BD+14 4559: Difference between revisions
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{{Short description|Orange-hued star in the constellation Pegasus}} |
{{Short description|Orange-hued star in the constellation Pegasus}} |
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{{distinguish|text=the [[Polaris]] star|}} |
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{{Starbox begin}} |
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{{Starbox begin|name=BD+14 4559 / Solaris}} |
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{{Starbox observe |
{{Starbox observe |
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| epoch = J2000.0 |
| epoch = J2000.0 |
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| constell = [[Pegasus (constellation)|Pegasus]] |
| constell = [[Pegasus (constellation)|Pegasus]] |
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| ra = {{RA|21|13|35.9901}}<ref name="Gaia DR2"/> |
| ra = {{RA|21|13|35.9901}}<ref name="Gaia DR2" /> |
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| dec = {{DEC|+14|41|21.7846}}<ref name="Gaia DR2"/> |
| dec = {{DEC|+14|41|21.7846}}<ref name="Gaia DR2" /> |
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| appmag_v = 9.78<ref name=Anderson_Francis_2012/> |
| appmag_v = 9.78<ref name=Anderson_Francis_2012/> |
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}} |
}} |
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{{Starbox character |
{{Starbox character |
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| type = |
| type = |
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| class = K2V<ref name="Niedzielski2009"/> |
| class = K2V<ref name="Niedzielski2009" /> |
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| r-i = 0.50<!-- 9.10-8.60 --><ref name=Anderson_Francis_2012/> |
| r-i = 0.50<!-- 9.10-8.60 --><ref name=Anderson_Francis_2012/> |
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| v-r = 0.68<!-- 9.78-9.10 --><ref name=Anderson_Francis_2012/> |
| v-r = 0.68<!-- 9.78-9.10 --><ref name=Anderson_Francis_2012/> |
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}} |
}} |
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{{Starbox astrometry |
{{Starbox astrometry |
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| radial_v = −44.30{{±|0.30}}<ref name="Gaia DR2"/> |
| radial_v = −44.30{{±|0.30}}<ref name="Gaia DR2" /> |
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| prop_mo_ra = 233.993{{±|0.057}} |
| prop_mo_ra = 233.993{{±|0.057}} |
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| prop_mo_dec = −0.275{{±|0.056}} |
| prop_mo_dec = −0.275{{±|0.056}} |
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| pm_footnote = <ref name="Gaia DR2"/> |
| pm_footnote = <ref name="Gaia DR2" /> |
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| parallax = 20.2337 |
| parallax = 20.2337 |
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| p_error = 0.0345 |
| p_error = 0.0345 |
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| parallax_footnote = <ref name="Gaia DR2"/> |
| parallax_footnote = <ref name="Gaia DR2" /> |
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| absmag_v = 6.14 |
| absmag_v = 6.14 |
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| absmag_bol = 5.56<ref name="Niedzielski2009"/> |
| absmag_bol = 5.56<ref name="Niedzielski2009" /> |
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}} |
}} |
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{{Starbox detail |
{{Starbox detail |
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}} |
}} |
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{{Starbox catalog |
{{Starbox catalog |
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| names = {{odlist | name=Solaris | AG=+14 2370 | BD=+14 4559 | HIP=104780 | LTT=16221 | PPM=139779 }}<ref name=SIMBAD/> |
| names = {{odlist | name=Solaris | AG=+14 2370 | BD=+14 4559 | HIP=104780 | LTT=16221 | PPM=139779 }}<ref name="SIMBAD" /> |
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}} |
}} |
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{{Starbox reference |
{{Starbox reference |
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{{Starbox end}} |
{{Starbox end}} |
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'''BD+14 4559''' is a [[star]] with an [[exoplanet]]ary companion in the northern [[constellation]] of [[Pegasus (constellation)|Pegasus]]. During the 2019 [[NameExoWorlds]] campaign, the star was named ''' |
'''BD+14 4559''' is a [[star]] with an [[exoplanet]]ary companion in the northern [[constellation]] of [[Pegasus (constellation)|Pegasus]]. During the 2019 [[NameExoWorlds]] campaign, the star was named '''Solaris''' by [[Poland]] after [[Solaris (novel)|a 1961 science fiction novel]] about an ocean-covered exoplanet by Polish writer [[Stanisław Lem]].<ref name="nameexoworlds" /> With an [[apparent visual magnitude]] of 9.78,<ref name="Anderson_Francis_2012" /> the star is too faint to be viewed with the naked eye. The system is located at a distance of 161 [[light-year]]s from the [[Sun]] based on [[Stellar parallax|parallax]] measurements, but is drifting closer with a [[radial velocity]] of −44 km/s.<ref name="Gaia DR2"/> It is a high [[proper motion]] star,<ref name="Niedzielski2009"/> traversing the [[celestial sphere]] at an [[angular rate]] of {{val|0.234|u=arcsecond}} yr<sup>−1</sup>.<ref name=Lepine2005/> |
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This is an ordinary [[K-type main sequence star]] with a [[stellar classification]] of K2V.<ref name="Niedzielski2009"/> The age of the star is poorly constrained, but is estimated to be roughly seven billion years. It has 82% of the mass and 78% of the radius of the Sun.<ref name=Bonfanti_et_al_2016/> The star is radiating 48%<ref name="Niedzielski2009"/> of the net luminosity of the Sun from its [[photosphere]] at an [[effective temperature]] of 4,948 K.<ref name=Bonfanti_et_al_2016/> It has a higher [[metallicity]] – the abundance of elements of higher [[atomic number]] than helium – compared to the Sun.<ref name="Niedzielski2009"/> |
This is an ordinary [[K-type main sequence star]] with a [[stellar classification]] of K2V.<ref name="Niedzielski2009" /> The age of the star is poorly constrained, but is estimated to be roughly seven billion years. It has 82% of the mass and 78% of the radius of the Sun.<ref name=Bonfanti_et_al_2016/> The star is radiating 48%<ref name="Niedzielski2009" /> of the net luminosity of the Sun from its [[photosphere]] at an [[effective temperature]] of 4,948 K.<ref name=Bonfanti_et_al_2016/> It has a higher [[metallicity]] – the abundance of elements of higher [[atomic number]] than helium – compared to the Sun.<ref name="Niedzielski2009" /> |
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==Planetary system== |
==Planetary system== |
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}} |
}} |
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{{OrbitboxPlanet |
{{OrbitboxPlanet |
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| exoplanet = [[BD+14 4559 b|b]] |
| exoplanet = [[BD+14 4559 b|b / Pirx]] |
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| mass = >1.52 ± 0.19 |
| mass = >1.52 ± 0.19 |
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| period = 268.94 ± 0.99 |
| period = 268.94 ± 0.99 |
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| volume=774 | issue=1 | id=27 | pages=10 | date=September 2013 |
| volume=774 | issue=1 | id=27 | pages=10 | date=September 2013 |
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| doi=10.1088/0004-637X/774/1/27 | arxiv=1307.4760 |
| doi=10.1088/0004-637X/774/1/27 | arxiv=1307.4760 |
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| bibcode=2013ApJ...774...27H }}</ref> |
| bibcode=2013ApJ...774...27H | s2cid=5072506 }}</ref> |
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<ref name=Lepine2005>{{cite journal |
<ref name=Lepine2005>{{cite journal |
Latest revision as of 22:32, 17 August 2024
Observation data Epoch J2000.0 Equinox J2000.0 | |
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Constellation | Pegasus |
Right ascension | 21h 13m 35.9901s[1] |
Declination | +14° 41′ 21.7846″[1] |
Apparent magnitude (V) | 9.78[2] |
Characteristics | |
Spectral type | K2V[3] |
B−V color index | 1.611±0.218 |
V−R color index | 0.68[2] |
R−I color index | 0.50[2] |
Astrometry | |
Radial velocity (Rv) | −44.30±0.30[1] km/s |
Proper motion (μ) | RA: 233.993±0.057 mas/yr[1] Dec.: −0.275±0.056 mas/yr[1] |
Parallax (π) | 20.2337 ± 0.0345 mas[1] |
Distance | 161.2 ± 0.3 ly (49.42 ± 0.08 pc) |
Absolute magnitude (MV) | 6.14 |
Absolute bolometric magnitude (Mbol) | 5.56[3] |
Details | |
Mass | 0.82±0.02[4] M☉ |
Radius | 0.78±0.02[4] R☉ |
Luminosity | 0.32±0.01[4] L☉ |
Luminosity (bolometric) | 0.4786[3] L☉ |
Surface gravity (log g) | 4.57±0.03[4] cgs |
Temperature | 4,948±25[4] K |
Metallicity [Fe/H] | 0.10±0.07[3] dex |
Age | 6.9±4.2[4] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Exoplanet Archive | data |
BD+14 4559 is a star with an exoplanetary companion in the northern constellation of Pegasus. During the 2019 NameExoWorlds campaign, the star was named Solaris by Poland after a 1961 science fiction novel about an ocean-covered exoplanet by Polish writer Stanisław Lem.[6] With an apparent visual magnitude of 9.78,[2] the star is too faint to be viewed with the naked eye. The system is located at a distance of 161 light-years from the Sun based on parallax measurements, but is drifting closer with a radial velocity of −44 km/s.[1] It is a high proper motion star,[3] traversing the celestial sphere at an angular rate of 0.234″ yr−1.[7]
This is an ordinary K-type main sequence star with a stellar classification of K2V.[3] The age of the star is poorly constrained, but is estimated to be roughly seven billion years. It has 82% of the mass and 78% of the radius of the Sun.[4] The star is radiating 48%[3] of the net luminosity of the Sun from its photosphere at an effective temperature of 4,948 K.[4] It has a higher metallicity – the abundance of elements of higher atomic number than helium – compared to the Sun.[3]
Planetary system
[edit]On June 10, 2009, an exoplanet (Pirx) was found in orbit by Niedzielski et al. using the Hobby-Eberly Telescope.[3] It has a minimum mass of one and a half Jupiter masses (MJ). The orbit of this object is highly eccentric and it spends 65% of its orbital period in the star's habitable zone.[8] A 2020 analysis of data from the Gaia mission has set a 3-sigma upper limit to its mass of 49.83 MJ.[9] There may be an undetected second planet orbiting the star, however this is unconfirmed.[3]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b / Pirx | >1.52 ± 0.19 MJ | 0.777 | 268.94 ± 0.99 | 0.29 ± 0.03 | >1.769° | — |
c (unconfirmed) | >2.4 MJ | >2.3 | 800? | — | — | — |
See also
[edit]References
[edit]- ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
- ^ a b c d e f g h i j k Niedzielski, A.; et al. (2009). "Substellar-mass Companions to the K-dwarf BD+14 4559 and the K-giants HD 240210 and BD+20 2457". The Astrophysical Journal. 707 (1): 768–777. arXiv:0906.1804. Bibcode:2009ApJ...707..768N. doi:10.1088/0004-637X/707/1/768. S2CID 16877069.
- ^ a b c d e f g h Bonfanti, A.; et al. (2016). "Age consistency between exoplanet hosts and field stars". Astronomy & Astrophysics. 585: 14. arXiv:1511.01744. Bibcode:2016A&A...585A...5B. doi:10.1051/0004-6361/201527297. S2CID 53971692. A5.
- ^ "9 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-11-12.
- ^ "Approved names". NameExoworlds. Retrieved 2020-01-02.
- ^ 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.
- ^ Hinkel, Natalie R.; Kane, Stephen R. (September 2013). "Habitability of Exomoons at the Hill or Tidal Locking Radius". The Astrophysical Journal. 774 (1): 10. arXiv:1307.4760. Bibcode:2013ApJ...774...27H. doi:10.1088/0004-637X/774/1/27. S2CID 5072506. 27.
- ^ a b Kiefer, F.; et al. (2021). "Determining the true mass of radial-velocity exoplanets with Gaia". Astronomy & Astrophysics. 645: A7. arXiv:2009.14164. Bibcode:2021A&A...645A...7K. doi:10.1051/0004-6361/202039168. S2CID 221995447.