Astronomy:V529 Andromedae
Observation data Equinox J2000.0]] (ICRS) | |
---|---|
Constellation | Andromeda |
Right ascension | 01h 27m 26.6729s[2] |
Declination | +41° 06′ 04.178″[2] |
Apparent magnitude (V) | 6.46[3] |
Characteristics | |
Spectral type | Am(kA5/hF1/mF2)[4] |
U−B color index | 0.03[3] |
B−V color index | 0.27[3] |
V−R color index | 0.26[3] |
R−I color index | 0.16[3] |
Variable type | γ Doradus and δ Scuti[5] |
Astrometry | |
Radial velocity (Rv) | 0.8±0.3[1] km/s |
Proper motion (μ) | RA: 9.611±0.030[2] mas/yr Dec.: 25.910±0.024[2] mas/yr |
Parallax (π) | 18.7624 ± 0.0298[2] mas |
Distance | 173.8 ± 0.3 ly (53.30 ± 0.08 pc) |
Absolute magnitude (MV) | +2.68[1] |
Details | |
Mass | 1.55±0.1[1] M☉ |
Radius | 1.7±0.1[1] R☉ |
Luminosity | 6.5±0.6[1] L☉ |
Surface gravity (log g) | 4.1±0.2[5] cgs |
Temperature | 7560±180[5] K |
Metallicity | +0.11[6] |
Rotational velocity (v sin i) | 53.1±0.5[5] km/s |
Age | 727[2] Myr |
Other designations | |
Database references | |
SIMBAD | data |
V529 Andromedae, also known as HD 8801, is a variable star in the constellation of Andromeda. It has a 13th magnitude visual companion star 15" away, which is just a distant star on the same line of sight.
It is also an Am star with a spectral classification Am(kA5/hF1/mF2), meaning that it has the calcium K line of a star with spectral type A5, the Balmer series of a F1 star, and metallic lines of an F2 star.[4]
Variability
V529 Andromedae was the first star known to combine Gamma Doradus and Delta Scuti type pulsations.[1] Nine different pulsation frequencies have been observed, and three of them could arise from a previously unknown stellar pulsation mode.[7]
Companion
V529 Andromedae has a 13th magnitude companion about 15″ away.[8] It is a far more distant star than V529 Andromedae, only coincidentally aligned in the sky.[9]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Henry, Gregory W.; Fekel, Francis C. (2005). "HD 8801: A Unique Single Am Star with γ Doradus and δ Scuti Pulsations". The Astronomical Journal 129 (4): 2026–2033. doi:10.1086/428373. Bibcode: 2005AJ....129.2026H.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 3.3 3.4 Mendoza, E. E. et al. (1978). "UBVRI photometry of 225 AM stars". The Astronomical Journal 83: 606–614. doi:10.1086/112242. Bibcode: 1978AJ.....83..606M.
- ↑ 4.0 4.1 Abt, Helmut A.; Morrell, Nidia I. (1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". The Astrophysical Journal Supplement Series 99: 135–172. doi:10.1086/192182. Bibcode: 1995ApJS...99..135A.
- ↑ 5.0 5.1 5.2 5.3 Neuteufel, R. et al. (2013). "Abundance analysis of the γ Doradus-δ Scuti hybrid metallic line (Am) star HD 8801". Astronomische Nachrichten 334 (7): 638–647. doi:10.1002/asna.201311909. Bibcode: 2013AN....334..638N.
- ↑ Ghazaryan, S.; Alecian, G.; Hakobyan, A. A. (2018). "New catalogue of chemically peculiar stars, and statistical analysis". Monthly Notices of the Royal Astronomical Society 480 (3): 2953–2962. doi:10.1093/mnras/sty1912. Bibcode: 2018MNRAS.480.2953G.
- ↑ Handler, G. (2009). "Confirmation of simultaneous p and g mode excitation in HD 8801 and γ Peg from time-resolved multicolour photometry of six candidate 'hybrid' pulsators". Monthly Notices of the Royal Astronomical Society 398 (3): 1339–1351. doi:10.1111/j.1365-2966.2009.15005.x. Bibcode: 2009MNRAS.398.1339H.
- ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal 122 (6): 3466. doi:10.1086/323920. Bibcode: 2001AJ....122.3466M.
- ↑ Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
![]() | Original source: https://en.wikipedia.org/wiki/V529 Andromedae.
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