Astronomy:HD 30453
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Auriga |
| Right ascension | 04h 49m 19.08028s[1] |
| Declination | +32° 35′ 17.4955″[1] |
| Apparent magnitude (V) | 5.86[2] |
| Characteristics | |
| Spectral type | A8m[3] or Am(A7/F0/F2)[4] |
| U−B color index | +0.14[2] |
| B−V color index | +0.24[2] |
| Astrometry | |
| Radial velocity (Rv) | 16.654±0.012[5] km/s |
| Proper motion (μ) | RA: +18.324[1] mas/yr Dec.: −34.866[1] mas/yr |
| Parallax (π) | 9.7628 ± 0.1172[1] mas |
| Distance | 334 ± 4 ly (102 ± 1 pc) |
| Orbit[5] | |
| Period (P) | 7.0508687±0.0000023 d |
| Semi-major axis (a) | ≥5.7633±0.0016 Gm |
| Eccentricity (e) | 0.0 (adopted) |
| Periastron epoch (T) | 2454673.72440±0.00043 MJD |
| Semi-amplitude (K1) (primary) | 0.442±0.017 km/s |
| Semi-amplitude (K2) (secondary) | 0.283±0.065 km/s |
| Details | |
| Radius | 3.59+0.16 −0.45[1] R☉ |
| Luminosity | 38.2±0.5[1] L☉ |
| Temperature | 7,568+532 −160[1] K |
| Rotational velocity (v sin i) | 16.0±9.7[6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 30453 is a binary star[8] system in the northern constellation of Auriga. It is visible to the naked eye with an apparent visual magnitude of 5.86.[2] The system is located at a distance of approximately 334 light years from the Sun based on parallax.[1] It is drifting further away from the Sun with a radial velocity of 16.65 km/s.[5]
This is a double-lined spectroscopic binary system with an essentially circular orbit and a period of one week.[5] The primary component is a chemically peculiar star of type CP1,[6] or Am star, with a stellar classification of A8m.[3] Abt and Morrell (1995) classed it as Am(A7/F0/F2),[4] indicating it has the hydrogen lines of an A7 star, the calcium K line of a cooler F0 star, and the metallic kines of an F2 class. It has been mentioned as a potential variable star.[9] The star has 3.6[1] times the girth of the Sun and is radiating 38 times the Sun's luminosity from its photosphere at an effective temperature of 7568 K.[1] It has a moderate rotation rate, with a projected rotational velocity of around 16 km/s.[6]
A third component was detected in 1987 using speckle interferometry at an angular separation of 0.04″.[5]
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 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. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 Mendoza, E. E. et al. (June 1978), "UBVRI photometry of 225 AM stars", Astronomical Journal 83: 606–614, doi:10.1086/112242, Bibcode: 1978AJ.....83..606M.
- ↑ 3.0 3.1 Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, doi:10.1086/110819, Bibcode: 1969AJ.....74..375C
- ↑ 4.0 4.1 Abt, Helmut A.; Morrell, Nidia I. (1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement 99: 135, doi:10.1086/192182, Bibcode: 1995ApJS...99..135A.
- ↑ 5.0 5.1 5.2 5.3 5.4 Fekel, Francis C. et al. (November 2013), "New Precision Orbits of Bright Double-lined Spectroscopic Binaries. VIII. HR 1528, HR 6993, 2 Sagittae, and 18 Vulpeculae", The Astronomical Journal 146 (5): 20, doi:10.1088/0004-6256/146/5/129, 129, Bibcode: 2013AJ....146..129F, https://repositories.lib.utexas.edu/bitstream/2152/34409/1/newprecisionorbits.pdf, retrieved 2019-12-15.
- ↑ 6.0 6.1 6.2 Paunzen, E. et al. (February 2013), "A photometric study of chemically peculiar stars with the STEREO satellites - II. Non-magnetic chemically peculiar stars", Monthly Notices of the Royal Astronomical Society 429 (1): 119–125, doi:10.1093/mnras/sts318, Bibcode: 2013MNRAS.429..119P.
- ↑ "HD 30453". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+30453.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
- ↑ Adelman, Saul J. (1998), "On the HIPPARCOS photometry of chemically peculiar B, A, and F stars", Astronomy and Astrophysics Supplement Series 132: 93–97, doi:10.1051/aas:1998361, Bibcode: 1998A&AS..132...93A.
 |  |
