32 Aquarii

32 Aquarii
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Aquarius
Right ascension	22h 04m 47.42197s
Declination	−00° 54′ 22.8469″
Apparent magnitude (V)	5.29
Characteristics
Spectral type	A5 IV or Am (A5/A9V/F2)
B−V color index	0.231±0.004
Astrometry
Radial velocity (Rv)	18.9±4.2 km/s
Proper motion (μ)	RA: −19.69 mas/yr ; Dec.: −42.15 mas/yr
Parallax (π)	14.4329 ± 0.1784 mas
Distance	226 ± 3 ly ; (69.3 ± 0.9 pc)
Absolute magnitude (MV)	1.12
Orbit
Period (P)	7.83238±0.00002 d
Eccentricity (e)	0
Periastron epoch (T)	53,420.2304±0.0001 HJD
Argument of periastron (ω); (secondary)	0°
Semi-amplitude (K1); (primary)	7.2150±0.4 km/s
Details
Mass	1.69 M☉
Radius	2.97+0.17; −0.07 R☉
Luminosity	29.4±0.4 L☉
Surface gravity (log g)	4.11 cgs
Temperature	7,976±271 K
Metallicity [Fe/H]	0.26±0.12 dex
Rotational velocity (v sin i)	9.6 km/s
Age	465 Myr
Other designations
	32 Aqr, BD−01°4242, HD 209625, HIP 108991, HR 8410, SAO 145853
Database references
SIMBAD	data

32 Aquarii is a binary star system in the zodiac constellation of Aquarius. 32 Aquarii is its Flamsteed designation. It is visible to the naked eye as a dim, white-hued star with an apparent visual magnitude of 5.29. This system is moving away from the Earth with a heliocentric radial velocity of +19 km/s, and is a possible member of the corona of the Ursa Major flow.

This is a single-lined spectroscopic binary with an (assumed) circular orbit having a period of only 7.8 days. It has an a sin i value of 0.777 Gm (0.00519 AU), where a is the semimajor axis and i is the orbital inclination. Since the sine function can be no larger than one, this provides a lower bound on the true semimajor axis of their orbit.

The primary component is a metallic-line (Am) star with the calcium K line of an A3 star, the hydrogen lines of an F1 star, and the metal lines of an F2 star. It is a sharp-lined, slowly rotating star with a projected rotational velocity of 9.6 km/s and is about 465 million years old. The star has 1.69 times the mass of the Sun and three times the Sun's radius. It is radiating 29 times the luminosity of the Sun from its photosphere at an effective temperature of 7,976 K.

References

^ ^a ^b ^c ^d ^e ^f ^g 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 ^e ^f 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.
^ Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, 5, Bibcode:1999MSS...C05....0H.
^ ^a ^b Abt, Helmut A. (January 2009), "MK Classifications of Spectroscopic Binaries", The Astrophysical Journal Supplement, 180 (1): 117–118, Bibcode:2009ApJS..180..117A, doi:10.1088/0067-0049/180/1/117, S2CID 122811461.
^ ^a ^b van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
^ ^a ^b ^c ^d ^e Carrier, F.; et al. (August 2007), "A search for solar-like oscillations in the Am star HD 209625", Astronomy and Astrophysics, 470 (3): 1009–1012, arXiv:0706.0803, Bibcode:2007A&A...470.1009C, doi:10.1051/0004-6361:20067022, S2CID 15812804.
^ ^a ^b ^c ^d ^e ^f ^g David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
^ Hui-Bon-Hoa, A. (June 2000), "Metal abundances of field A and Am stars", Astronomy and Astrophysics Supplement, 144 (2): 203–209, Bibcode:2000A&AS..144..203H, doi:10.1051/aas:2000207.
^ "32 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-05-16.
^ Chupina, N. V.; et al. (June 2006), "Kinematic structure of the corona of the Ursa Major flow found using proper motions and radial velocities of single stars", Astronomy and Astrophysics, 451 (3): 909–916, Bibcode:2006A&A...451..909C, doi:10.1051/0004-6361:20054009.
^ Kocer, D.; et al. (July 1987), "Optical region elemental abundance analyses of B and A stars. VII - The metallic-lined star 32 Aquarii", Astronomy and Astrophysics Supplement Series, 70 (1): 49–56, Bibcode:1987A&AS...70...49K.

[GaiaDR2-1] ^ ^a ^b ^c ^d ^e ^f ^g 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.

[Anderson2012-2] ^ ^a ^b ^c ^d ^e ^f 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.

[Houk1999-3] Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, 5, Bibcode:1999MSS...C05....0H.

[Abt2009-4] Abt, Helmut A. (January 2009), "MK Classifications of Spectroscopic Binaries", The Astrophysical Journal Supplement, 180 (1): 117–118, Bibcode:2009ApJS..180..117A, doi:10.1088/0067-0049/180/1/117, S2CID 122811461.

[vanLeeuwen2007-5] van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.

[Carrier2007-6] Carrier, F.; et al. (August 2007), "A search for solar-like oscillations in the Am star HD 209625", Astronomy and Astrophysics, 470 (3): 1009–1012, arXiv:0706.0803, Bibcode:2007A&A...470.1009C, doi:10.1051/0004-6361:20067022, S2CID 15812804.

[David2015-7] ^ ^a ^b ^c ^d ^e ^f ^g David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.

[HuiBonHoa2000-8] Hui-Bon-Hoa, A. (June 2000), "Metal abundances of field A and Am stars", Astronomy and Astrophysics Supplement, 144 (2): 203–209, Bibcode:2000A&AS..144..203H, doi:10.1051/aas:2000207.

[SIMBAD-9] "32 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-05-16.

[Chupina2006-10] Chupina, N. V.; et al. (June 2006), "Kinematic structure of the corona of the Ursa Major flow found using proper motions and radial velocities of single stars", Astronomy and Astrophysics, 451 (3): 909–916, Bibcode:2006A&A...451..909C, doi:10.1051/0004-6361:20054009.

[Kocer1987-11] Kocer, D.; et al. (July 1987), "Optical region elemental abundance analyses of B and A stars. VII - The metallic-lined star 32 Aquarii", Astronomy and Astrophysics Supplement Series, 70 (1): 49–56, Bibcode:1987A&AS...70...49K.