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{{Short description|Star in the constellation Cancer}} |
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{{unreferenced|date=August 2012}} |
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{{Starbox begin |
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'''HD 79498''' is a [[star]] located approximately 160 [[light years]] away in the constellation [[Cancer (constellation)|Cancer]]. It has a [[right ascension]] of 09h 15m 09s and a [[declination]] of 23°22'32". This G5 [[spectral class]] star has an [[apparent magnitude]] of 8.03 and an [[absolute magnitude]] that has not yet been measured. An [[extrasolar planet]] was detected around HD 79498 using a small wobble in it's [[orbit]]. The planet was ultimately named [[HD 79498b]] by the [[IAU]] after it's parent star. |
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| name = HD 79498 |
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}} |
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{{Starbox observe |
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| epoch = J2000.0 |
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| constell = [[Cancer (constellation)|Cancer]] |
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| component = |
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| ra = {{RA|09|15|09.4020}}<ref name=dr3/> |
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| dec = {{DEC|+23|22|31.979}}<ref name=dr3/> |
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| appmag_v = 8.05<ref name=ment2018/> |
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}} |
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{{Starbox character |
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| type = [[main sequence]] |
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| class = G5 V<ref name=montes2018/> + M0 V<ref name=Alonso-Floriano_et_al_2015/> |
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| b-v = |
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| u-b = |
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| variable = None<ref name=apj749_1_39/> |
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}} |
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{{Starbox astrometry |
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| radial_v = {{val|19.94|0.14}}<ref name=dr3/> |
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| prop_mo_ra = −127.013<ref name=dr3/> |
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| prop_mo_dec = −155.703<ref name=dr3/> |
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| parallax = 20.5658 |
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| p_error = 0.0198 |
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| parallax_footnote = <ref name=dr3/> |
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| absmag_v = 4.62<ref name=bs2018/> |
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}} |
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{{Starbox detail |
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| source = |
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| component1 = Primary (A) |
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| mass = 1.08<ref name=ag2018/> |
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| radius = 1.05<ref name=ment2018/> |
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| luminosity = 1.07<ref name=ment2018/> |
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| temperature = 5,800<ref name=montes2018/> |
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| metal_fe = +0.21<ref name=montes2018/> |
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| gravity = 4.43<ref name=montes2018/> |
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| rotational_velocity = 2.0<ref name=lda2021/> |
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| age_gyr = 2.8<ref name=ag2018/> |
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| component2 = Secondary (B) |
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| temperature2 = 3,881<ref name=Veyette_et_al_2017/> |
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| metal_fe2 = 0.18<ref name=Veyette_et_al_2017/> |
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}} |
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{{Starbox catalog |
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| names = {{odlist|BD=+23°2063|HIP=45406|SAO=80717|HD=79498|2MASS=J09150941+2322323}}<ref name=SIMBAD/> |
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}} |
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{{Starbox reference |
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| Simbad = HD+79498 |
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}} |
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{{Starbox end}} |
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'''HD 79498''' is a [[double star]] in the northern [[constellation]] of [[Cancer (constellation)|Cancer]]. The primary component of this pair has an orbiting [[exoplanet]] companion. This star is too faint to be viewed with the naked eye, having an [[apparent visual magnitude]] of 8.05.<ref name=ment2018/> The system is located at a distance of 159 [[light year]]s based on [[stellar parallax|parallax]] measurements,<ref name=dr3/> and is drifting further away with a heliocentric [[radial velocity]] of 20 km/s.<ref name=dr3/> It has a relatively high [[proper motion]], traversing the [[celestial sphere]] at an angular rate of {{val|0.2|ul=arcsecond}}·yr<sup>−1</sup>.<ref name=Lepine_Shara_2005/> |
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==References== |
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The primary, designated component A, is a [[G-type main-sequence star]] with a [[stellar classification]] of G5 V.<ref name=montes2018/> It has 8%<ref name=ag2018/> greater mass compared to the Sun and a 5% larger girth.<ref name=ment2018/> The star is estimated to be 2.8<ref name=ag2018/> billion years old and appears to be spinning slowly with a [[projected rotational velocity]] of 2.0 km/s.<ref name=lda2021/> It has a higher than solar abundance of elements other than hydrogen and helium; what astronomers term a [[metallicity|metal-rich]] star.<ref name=epe_HD_79498_b/> The star is radiating 7% more luminosity than the Sun from its [[photosphere]] at an [[effective temperature]] of 5,800 K.<ref name=montes2018/> There appears to be only a low level of [[magnetic activity]] in the star's [[chromosphere]].<ref name=apj749_1_39/> |
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The secondary member, component B, is located at a [[projected separation]] of {{val|2900|ul=AU|fmt=commas}} from the primary.<ref name=apj749_1_39/> It is a small [[red dwarf]] of spectral class M0 V.<ref name=Alonso-Floriano_et_al_2015/> |
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==Planetary system== |
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The [[McDonald Observatory]] planet search program discovered an exoplanet orbiting the primary in 2011 using the [[radial velocity method]].<ref name=apj749_1_39/> |
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{{OrbitboxPlanet begin |
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| table_ref = <ref name=apj749_1_39/> |
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}} |
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{{OrbitboxPlanet |
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| exoplanet = Ab |
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| mass = ≥1.34 ± 0.07 |
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| period = 1966 ± 41 |
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| semimajor = 3.13 ± 0.08 |
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| eccentricity = 0.59 ± 0.02 |
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}} |
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{{Orbitbox end}} |
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==See also== |
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*[[List of stars in Cancer]] |
*[[List of stars in Cancer]] |
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*'''[[Cancer(constellation)]]''' |
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==References== |
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{{reflist|refs= |
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<ref name=ag2018>{{cite journal |bibcode=2018A&A...614A..55A |title=Lithium abundance patterns of late-F stars: An in-depth analysis of the lithium desert |journal=Astronomy and Astrophysics |volume=614 |pages=A55 |last1=Aguilera-Gómez |first1=Claudia |last2=Ramírez |first2=Iván |last3=Chanamé |first3=Julio |year=2018 |arxiv=1803.05922 |doi=10.1051/0004-6361/201732209 |s2cid=62799777 }}</ref> |
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<ref name=ment2018>{{cite journal | title=Radial Velocities from the N2K Project: Six New Cold Gas Giant Planets Orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810 | last1=Ment | first1=Kristo | last2=Fischer | first2=Debra A. | last3=Bakos | first3=Gaspar | last4=Howard | first4=Andrew W. | last5=Isaacson | first5=Howard | display-authors=1 | journal=The Astronomical Journal | volume=156 | issue=5 | at=213 | year=2018 | arxiv=1809.01228 | bibcode=2018AJ....156..213M | doi=10.3847/1538-3881/aae1f5 | s2cid=119243619 | doi-access=free }}</ref> |
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<ref name=lda2021>{{cite journal | display-authors=1 |last1=Llorente de Andrés |first1=F. |last2=Chavero |first2=C. |last3=de la Reza |first3=R. |last4=Roca-Fàbrega |first4=S. |last5=Cifuentes |first5=C. |title=The evolution of lithium in FGK dwarf stars. The lithium-rotation connection and the Li desert |journal=Astronomy and Astrophysics |date=October 2021 |volume=654 |pages=A137 |doi=10.1051/0004-6361/202141339 |bibcode=2021A&A...654A.137L |issn=0004-6361 |arxiv=2108.05852 |doi-access=free}}</ref> |
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<ref name=montes2018>{{cite journal |
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| title=Calibrating the metallicity of M dwarfs in wide physical binaries with F-, G-, and K-primaries - I: High-resolution spectroscopy with HERMES: stellar parameters, abundances, and kinematics |
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| last1=Montes | first1=D. | last2=González-Peinado | first2=R. |
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| last3=Tabernero | first3=H. M. | last4=Caballero | first4=J. A. |
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| last5=Marfil | first5=E. | last6=Alonso-Floriano | first6=F. J. |
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| last7=Cortés-Contreras | first7=M. | last8=González Hernández | first8=J. I. |
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| last9=Klutsch | first9=A. | last10=Moreno-Jódar | first10=C. |
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| display-authors=1 | journal=Monthly Notices of the Royal Astronomical Society |
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| volume=479 | issue=1 | pages=1332–1382 | date=September 2018 |
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| doi=10.1093/mnras/sty1295 | doi-access=free | arxiv=1805.05394 |
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| bibcode=2018MNRAS.479.1332M | s2cid=119260219 }}</ref> |
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<ref name=bs2018>{{cite journal |bibcode=2018A&A...616A.108B |title=Chromospheric activity catalogue of 4454 cool stars. Questioning the active branch of stellar activity cycles | display-authors=1 |last1=Boro Saikia |first1=S. |last2=Marvin |first2=C. J. |last3=Jeffers |first3=S. V. |last4=Reiners |first4=A. |last5=Cameron |first5=R. |last6=Marsden |first6=S. C. |last7=Petit |first7=P. |last8=Warnecke |first8=J. |last9=Yadav |first9=A. P. |journal=Astronomy and Astrophysics |year=2018 |volume=616 |page=616 |doi=10.1051/0004-6361/201629518 |arxiv=1803.11123 |s2cid=118915212 }}</ref> |
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<ref name=apj749_1_39>{{cite journal | display-authors=1 | last1=Robertson | first1=Paul | last2=Endl | first2=Michael | last3=Cochran | first3=William D. | last4=MacQueen | first4=Phillip J. | last5=Wittenmyer | first5=Robert A. | last6=Horner | first6=J. | last7=Brugamyer | first7=Erik J. | last8=Simon | first8=Attila E. | last9=Barnes | first9=Stuart I. | last10=Caldwell | first10=Caroline | title=The McDonald Observatory Planet Search: New Long-period Giant Planets and Two Interacting Jupiters in the HD 155358 System | journal=The Astrophysical Journal | volume=749 | issue=1 | page=39 |date=April 2012 | doi=10.1088/0004-637X/749/1/39 | bibcode=2012ApJ...749...39R | arxiv=1202.0265 | s2cid=59273311 }}</ref> |
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<ref name=epe_HD_79498_b>{{cite journal | first=Jean | last=Schneider | title=Planet HD 79498 b | date=1995 | url=https://exoplanet.eu/catalog/hd_79498_b--1091/ | work=[[Extrasolar Planets Encyclopaedia]] | access-date=2012-08-22 }}</ref> |
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<ref name=dr3>{{Cite Gaia DR3|686996756484129664}}</ref> |
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<ref name=SIMBAD>{{cite simbad | title=HD 79498 | access-date=15 August 2012 }}</ref> |
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<ref name=Alonso-Floriano_et_al_2015>{{cite journal |
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| title=CARMENES input catalogue of M dwarfs. I. Low-resolution spectroscopy with CAFOS |
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| last1=Alonso-Floriano | first1=F. J. | last2=Morales | first2=J. C. |
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| last3=Caballero | first3=J. A. | last4=Montes | first4=D. |
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| last5=Klutsch | first5=A. | last6=Mundt | first6=R. |
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| last7=Cortés-Contreras | first7=M. | last8=Ribas | first8=I. |
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| last9=Reiners | first9=A. | last10=Amado | first10=P. J. |
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| last11=Quirrenbach | first11=A. | last12=Jeffers | first12=S. V. |
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| display-authors=1 | journal=Astronomy & Astrophysics |
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| volume=577 | id=A128 | pages=19 | date=May 2015 |
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| doi=10.1051/0004-6361/201525803 | arxiv=1502.07580 |
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| bibcode=2015A&A...577A.128A | s2cid=53135130 }}</ref> |
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<ref name=Veyette_et_al_2017>{{cite journal |
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| title=A Physically Motivated and Empirically Calibrated Method to Measure the Effective Temperature, Metallicity, and Ti Abundance of M Dwarfs |
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| last1=Veyette | first1=Mark J. | last2=Muirhead | first2=Philip S. |
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| last3=Mann | first3=Andrew W. | last4=Brewer | first4=John M. |
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| last5=Allard | first5=France | last6=Homeier | first6=Derek |
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| display-authors=1 | journal=The Astrophysical Journal |
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| volume=851 | issue=1 | id=26 | date=December 2017 |
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| page=26 | doi=10.3847/1538-4357/aa96aa | arxiv=1710.10259 |
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| bibcode=2017ApJ...851...26V | doi-access=free }}</ref> |
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<ref name=Lepine_Shara_2005>{{cite journal |
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| last1=Lépine | first1=Sébastien | last2=Shara | first2=Michael M. |
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| title=A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog) |
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| journal=The Astronomical Journal |
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| volume=129 | issue=3 | pages=1483–1522 | date=March 2005 |
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| doi=10.1086/427854 | bibcode=2005AJ....129.1483L |
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| arxiv=astro-ph/0412070 | s2cid=2603568 }}</ref> |
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}} |
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{{Sky|09|15|09.40|+|23|22|32.0}} |
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{{Stars of Cancer}} |
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{{DEFAULTSORT:HD 79498}} |
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<!-- Properties --> |
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[[Category:G-type main-sequence stars]] |
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[[Category:M-type main-sequence stars]] |
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[[Category:Binary stars]] |
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[[Category:Planetary systems with one confirmed planet]] |
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<!-- Location/catalogues --> |
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[[Category:Cancer (constellation)]] |
[[Category:Cancer (constellation)]] |
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[[Category: |
[[Category:Durchmusterung objects]] |
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[[Category: |
[[Category:Henry Draper Catalogue objects|079498]] |
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[[Category:Hipparcos objects|045406]] |
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[[Category:2MASS objects|J09150941+2322323]] |
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Latest revision as of 14:47, 18 July 2024
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 09h 15m 09.4020s[1] |
| Declination | +23° 22′ 31.979″[1] |
| Apparent magnitude (V) | 8.05[2] |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | G5 V[3] + M0 V[4] |
| Variable type | None[5] |
| Astrometry | |
| Radial velocity (Rv) | 19.94±0.14[1] km/s |
| Proper motion (μ) | RA: −127.013[1] mas/yr Dec.: −155.703[1] mas/yr |
| Parallax (π) | 20.5658 ± 0.0198 mas[1] |
| Distance | 158.6 ± 0.2 ly (48.62 ± 0.05 pc) |
| Absolute magnitude (MV) | 4.62[6] |
| Details | |
| Primary (A) | |
| Mass | 1.08[7] M☉ |
| Radius | 1.05[2] R☉ |
| Luminosity | 1.07[2] L☉ |
| Surface gravity (log g) | 4.43[3] cgs |
| Temperature | 5,800[3] K |
| Metallicity [Fe/H] | +0.21[3] dex |
| Rotational velocity (v sin i) | 2.0[8] km/s |
| Age | 2.8[7] Gyr |
| Secondary (B) | |
| Temperature | 3,881[9] K |
| Metallicity [Fe/H] | 0.18[9] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 79498 is a double star in the northern constellation of Cancer. The primary component of this pair has an orbiting exoplanet companion. This star is too faint to be viewed with the naked eye, having an apparent visual magnitude of 8.05.[2] The system is located at a distance of 159 light years based on parallax measurements,[1] and is drifting further away with a heliocentric radial velocity of 20 km/s.[1] It has a relatively high proper motion, traversing the celestial sphere at an angular rate of 0.2″·yr−1.[11]
The primary, designated component A, is a G-type main-sequence star with a stellar classification of G5 V.[3] It has 8%[7] greater mass compared to the Sun and a 5% larger girth.[2] The star is estimated to be 2.8[7] billion years old and appears to be spinning slowly with a projected rotational velocity of 2.0 km/s.[8] It has a higher than solar abundance of elements other than hydrogen and helium; what astronomers term a metal-rich star.[12] The star is radiating 7% more luminosity than the Sun from its photosphere at an effective temperature of 5,800 K.[3] There appears to be only a low level of magnetic activity in the star's chromosphere.[5]
The secondary member, component B, is located at a projected separation of 2,900 AU from the primary.[5] It is a small red dwarf of spectral class M0 V.[4]
Planetary system
[edit]The McDonald Observatory planet search program discovered an exoplanet orbiting the primary in 2011 using the radial velocity method.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| Ab | ≥1.34 ± 0.07 MJ | 3.13 ± 0.08 | 1966 ± 41 | 0.59 ± 0.02 | — | — |
See also
[edit]References
[edit]- ^ a b c d e f g h Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d e Ment, Kristo; et al. (2018). "Radial Velocities from the N2K Project: Six New Cold Gas Giant Planets Orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810". The Astronomical Journal. 156 (5). 213. arXiv:1809.01228. Bibcode:2018AJ....156..213M. doi:10.3847/1538-3881/aae1f5. S2CID 119243619.
- ^ a b c d e f Montes, D.; et al. (September 2018). "Calibrating the metallicity of M dwarfs in wide physical binaries with F-, G-, and K-primaries - I: High-resolution spectroscopy with HERMES: stellar parameters, abundances, and kinematics". Monthly Notices of the Royal Astronomical Society. 479 (1): 1332–1382. arXiv:1805.05394. Bibcode:2018MNRAS.479.1332M. doi:10.1093/mnras/sty1295. S2CID 119260219.
- ^ a b Alonso-Floriano, F. J.; et al. (May 2015). "CARMENES input catalogue of M dwarfs. I. Low-resolution spectroscopy with CAFOS". Astronomy & Astrophysics. 577: 19. arXiv:1502.07580. Bibcode:2015A&A...577A.128A. doi:10.1051/0004-6361/201525803. S2CID 53135130. A128.
- ^ a b c d e Robertson, Paul; et al. (April 2012). "The McDonald Observatory Planet Search: New Long-period Giant Planets and Two Interacting Jupiters in the HD 155358 System". The Astrophysical Journal. 749 (1): 39. arXiv:1202.0265. Bibcode:2012ApJ...749...39R. doi:10.1088/0004-637X/749/1/39. S2CID 59273311.
- ^ Boro Saikia, S.; et al. (2018). "Chromospheric activity catalogue of 4454 cool stars. Questioning the active branch of stellar activity cycles". Astronomy and Astrophysics. 616: 616. arXiv:1803.11123. Bibcode:2018A&A...616A.108B. doi:10.1051/0004-6361/201629518. S2CID 118915212.
- ^ a b c d Aguilera-Gómez, Claudia; Ramírez, Iván; Chanamé, Julio (2018). "Lithium abundance patterns of late-F stars: An in-depth analysis of the lithium desert". Astronomy and Astrophysics. 614: A55. arXiv:1803.05922. Bibcode:2018A&A...614A..55A. doi:10.1051/0004-6361/201732209. S2CID 62799777.
- ^ a b Llorente de Andrés, F.; et al. (October 2021). "The evolution of lithium in FGK dwarf stars. The lithium-rotation connection and the Li desert". Astronomy and Astrophysics. 654: A137. arXiv:2108.05852. Bibcode:2021A&A...654A.137L. doi:10.1051/0004-6361/202141339. ISSN 0004-6361.
- ^ a b Veyette, Mark J.; et al. (December 2017). "A Physically Motivated and Empirically Calibrated Method to Measure the Effective Temperature, Metallicity, and Ti Abundance of M Dwarfs". The Astrophysical Journal. 851 (1): 26. arXiv:1710.10259. Bibcode:2017ApJ...851...26V. doi:10.3847/1538-4357/aa96aa. 26.
- ^ "HD 79498". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 15 August 2012.
- ^ Lépine, Sébastien; Shara, Michael M. (March 2005). "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)". The Astronomical Journal. 129 (3): 1483–1522. arXiv:astro-ph/0412070. Bibcode:2005AJ....129.1483L. doi:10.1086/427854. S2CID 2603568.
- ^ Schneider, Jean (1995). "Planet HD 79498 b". Extrasolar Planets Encyclopaedia. Retrieved 2012-08-22.
