HD 8535 is a star located 181 light-years (55 parsecs) away from the Sun in the southern constellation of Phoenix. It has a yellow hue and can be viewed using binoculars or a small telescope, having a low apparent visual magnitude of 7.70.[2] The star is drifting further away from the Sun with a radial velocity of +2.5 km/s.[1]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Phoenix |
| Right ascension | 01h 23m 37.23585s[1] |
| Declination | –41° 16′ 11.2795″[1] |
| Apparent magnitude (V) | 7.70[2] |
| Characteristics | |
| Spectral type | G0V[3] |
| Apparent magnitude (B) | 8.22[4] |
| Apparent magnitude (J) | 6.735[5] |
| Apparent magnitude (H) | 6.449[5] |
| Apparent magnitude (K) | 6.354[5] |
| B−V color index | 0.553±0.009[2] |
| Astrometry | |
| Radial velocity (Rv) | +2.51±0.12[1] km/s |
| Proper motion (μ) | RA: +57.795 mas/yr[1] Dec.: −69.879 mas/yr[1] |
| Parallax (π) | 18.0657 ± 0.0181 mas[1] |
| Distance | 180.5 ± 0.2 ly (55.35 ± 0.06 pc) |
| Absolute magnitude (MV) | 4.10[2] |
| Details[6] | |
| Mass | 1.17±0.02 M☉ |
| Radius | 1.18±0.02 R☉ |
| Luminosity | 1.85±0.01 L☉ |
| Surface gravity (log g) | 4.36±0.02 cgs |
| Temperature | 6,200±50 K |
| Metallicity [Fe/H] | 0.02 dex |
| Rotational velocity (v sin i) | 3.07[7] km/s |
| Age | 2.1±0.9 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
This is an ordinary G-type main-sequence star with a stellar classification of G0V.[3] The luminosity class of 'V' indicates the star is generating energy through core hydrogen fusion. It is about two[6] billion years old and is spinning slowly with a projected rotational velocity of 3 km/s.[7] The abundance of elements other than hydrogen and helium in the star – what astronomers term metallicity – is about the same as in the Sun. It has 17% more mass than the Sun and an 18% greater radius. The star is radiating 1.85 times the luminosity of the Sun from its photosphere at an effective temperature of 6,200 K.[6]
A survey in 2015 has ruled out the existence of any stellar companions at projected distances above 23 astronomical units.[9] However, in 2019 a white dwarf companion to this star was found.[10]
Planetary system
editIn 2009, a gas giant was found in orbit around the star using the radial velocity method. It has an orbital period of 3.59 years and has at least 68% of the mass of Jupiter.[11]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥ 0.68+0.07 −0.04 MJ |
2.45+0.04 −0.06 |
1,313±28 | 0.15+0.09 −0.05 |
— | — |
See also
editReferences
edit- ^ a b c d e f 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 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 Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 2. Ann Arbor: Dept. of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
- ^ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862. ISBN 978-0333750889.
- ^ a b c Cutri, R. M.; et al. (June 2003). 2MASS All Sky Catalog of point sources. NASA/IPAC. Bibcode:2003tmc..book.....C.
- ^ a b c Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951. S2CID 54555839.
- ^ a b Delgado Mena, E.; et al. (April 2015). "Li abundances in F stars: planets, rotation, and Galactic evolution". Astronomy & Astrophysics. 576: 24. arXiv:1412.4618. Bibcode:2015A&A...576A..69D. doi:10.1051/0004-6361/201425433. S2CID 56051637. A69.
- ^ "HD 8535". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-11-08.
- ^ Mugrauer, M.; Ginski, C. (12 May 2015). "High-contrast imaging search for stellar and substellar companions of exoplanet host stars". Monthly Notices of the Royal Astronomical Society. 450 (3): 3127–3136. Bibcode:2015MNRAS.450.3127M. doi:10.1093/mnras/stv771. hdl:1887/49340. Retrieved 19 June 2020.
- ^ Mugrauer, M. (December 2019). "Search for stellar companions of exoplanet host stars by exploring the second ESA-Gaia data release". Monthly Notices of the Royal Astronomical Society. 490 (4): 5088–5102. Bibcode:2019MNRAS.490.5088M. doi:10.1093/mnras/stz2673.
- ^ a b Naef, Dominique; Mayor, Michel; Lo Curto, Gaspare; Bouchy, François; Lovis, Christophe; Moutou, Claire; Benz, Willy; Pepe, Francesco; Queloz, Didier; Santos, Nuno C.; Ségransan, Damien; Udry, Stéphane; Bonfils, Xavier; Delfosse, Xavier; Forveille, Thierry; Hébrard, Guillaume; Mordasini, Christoph; Perrier, Christian; Boisse, Isabelle; Sosnowska, Danuta (2010). "The HARPS Search for Southern Extrasolar Planets XXIII. 8 Planetary Companions to Low-activity Solar-type Stars". Astronomy and Astrophysics. 523: A15. arXiv:1008.4600. Bibcode:2010A&A...523A..15N. doi:10.1051/0004-6361/200913616. S2CID 118845989.