Astronomy:HD 146624
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 16h 18m 17.89900s[1] |
| Declination | −28° 36′ 50.4721″[1] |
| Apparent magnitude (V) | 4.80[2] |
| Characteristics | |
| Spectral type | A0 V[3] |
| B−V color index | +0.008±0.018[2] |
| Astrometry | |
| Radial velocity (Rv) | −13.0±0.8[4] km/s |
| Proper motion (μ) | RA: −31.971[1] mas/yr Dec.: −101.295[1] mas/yr |
| Parallax (π) | 23.0018 ± 0.3267[1] mas |
| Distance | 142 ± 2 ly (43.5 ± 0.6 pc) |
| Absolute magnitude (MV) | 1.14[5] |
| Details | |
| Mass | 1.49[3] or 2.13±0.02[6] M☉ |
| Radius | 1.60[7] R☉ |
| Luminosity | 21.46+0.53 −0.51[6] L☉ |
| Surface gravity (log g) | 3.99±0.13[8] cgs |
| Temperature | 9,441+109 −108[6] K |
| Metallicity [Fe/H] | −0.27±0.12[8] dex |
| Rotational velocity (v sin i) | 39[6] km/s |
| Age | 10[3] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 146624 (d Scorpii) is a single,[3] white-hued star in the southern zodiac constellation of Scorpius. It is faintly visible to the naked eye, having an apparent visual magnitude of 4.80.[2] The distance to HD 146624 can be estimated from its annual parallax shift of 23.0 mas,[1] yielding a separation of 142 light years. At that distance, the visual magnitude is reduced by an extinction of 0.17 due to interstellar dust.[5] It is a member of the Beta Pictoris moving group, a set of ~12 million year old stars that share a common motion through space.[10]
This is an A-type main-sequence star with a stellar classification of A0 V,[3] and is suspected to be chemically peculiar.[11][6] It is a young star, just 10[3] million years old, with a projected rotational velocity of 39 km/s.[6] The mass of the star is greater than the Sun's, with De Rosa et al. (2014) estimating 1.49[3] times the mass of the Sun, while Zorec and Royer (2012) gives a multiplier of 2.13±0.02.[6] It has 1.60[7] times the Sun's radius and shines with 21 times the Sun's luminosity from its photosphere at an effective temperature of 9,441 K.[6]
The star displays an infrared excess, suggesting a circumstellar disk of orbiting material. This has a mean temperature of 280 K, matching a disk radius of 4.20 astronomical unit|AU.[7]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.
- ↑ 2.0 2.1 2.2 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 De Rosa, R. J. et al. (2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc", Monthly Notices of the Royal Astronomical Society 437 (2): 1216, doi:10.1093/mnras/stt1932, Bibcode: 2014MNRAS.437.1216D.
- ↑ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics 546: 14, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D.
- ↑ 5.0 5.1 Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters 38 (11): 694–706, doi:10.1134/S1063773712110035, Bibcode: 2012AstL...38..694G.
- ↑ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.
- ↑ 7.0 7.1 7.2 Cotten, Tara H.; Song, Inseok (July 2016), "A Comprehensive Census of Nearby Infrared Excess Stars", The Astrophysical Journal Supplement Series 225 (1): 24, doi:10.3847/0067-0049/225/1/15, 15, Bibcode: 2016ApJS..225...15C.
- ↑ 8.0 8.1 Prugniel, Ph. et al. (2011), "The atmospheric parameters and spectral interpolator for the MILES stars", Astronomy & Astrophysics 531: A165, doi:10.1051/0004-6361/201116769, Bibcode: 2011A&A...531A.165P.
- ↑ "HD 146624". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+146624.
- ↑ Zuckerman, B.; Song, Inseok; Bessell, M. S.; Webb, R. A. (November 2001), "The β Pictoris Moving Group", The Astrophysical Journal 562 (1): L87–L90, doi:10.1086/337968, Bibcode: 2001ApJ...562L..87Z.
- ↑ Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics 498 (3): 961–966, doi:10.1051/0004-6361/200810788, Bibcode: 2009A&A...498..961R, https://zenodo.org/record/890529.
 |  |
