HD 30453

HD 30453
Observation data; Epoch J2000 Equinox J2000
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
	BD+32°840, HD 30453, HIP 22407, HR 1528, SAO 57444[7]
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

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.
Mendoza, E. E.; et al. (June 1978), "UBVRI photometry of 225 AM stars", Astronomical Journal, 83: 606–614, Bibcode:1978AJ.....83..606M, doi:10.1086/112242.
Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819
Abt, Helmut A.; Morrell, Nidia I. (1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182.
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" (PDF), The Astronomical Journal, 146 (5): 20, Bibcode:2013AJ....146..129F, doi:10.1088/0004-6256/146/5/129, 129, retrieved 2019-12-15.
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, arXiv:1211.1535, Bibcode:2013MNRAS.429..119P, doi:10.1093/mnras/sts318.
"HD 30453". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-12-15.
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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
Adelman, Saul J. (1998), "On the HIPPARCOS photometry of chemically peculiar B, A, and F stars", Astronomy and Astrophysics Supplement Series, 132: 93–97, Bibcode:1998A&AS..132...93A, doi:10.1051/aas:1998361.

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[GaiaDR2-1] 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.

[aj83_606-2] Mendoza, E. E.; et al. (June 1978), "UBVRI photometry of 225 AM stars", Astronomical Journal, 83: 606–614, Bibcode:1978AJ.....83..606M, doi:10.1086/112242.

[aj74_375-3] Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819

[Abt1995-4] Abt, Helmut A.; Morrell, Nidia I. (1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182.

[Fekel2013-5] 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" (PDF), The Astronomical Journal, 146 (5): 20, Bibcode:2013AJ....146..129F, doi:10.1088/0004-6256/146/5/129, 129, retrieved 2019-12-15.

[Paunzen2013-6] 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, arXiv:1211.1535, Bibcode:2013MNRAS.429..119P, doi:10.1093/mnras/sts318.

[SIMBAD-7] "HD 30453". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-12-15.

[Eggleton2008-8] 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.

[Adelman1998-9] Adelman, Saul J. (1998), "On the HIPPARCOS photometry of chemically peculiar B, A, and F stars", Astronomy and Astrophysics Supplement Series, 132: 93–97, Bibcode:1998A&AS..132...93A, doi:10.1051/aas:1998361.