 The visual band light curve of DV Aquarii, adapted from Okazaki (1985) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 20 58 41.84009 |
| Declination | −14° 28′ 59.2527″ |
| Apparent magnitude (V) | 5.89 |
| Characteristics | |
| Spectral type | A9 V |
| B−V color index | 0.244±0.009 |
| Variable type | β Lyr |
| Astrometry | |
| Radial velocity (Rv) | +10.3±7.4 km/s |
| Proper motion (μ) | RA: −54.986 mas/yr Dec.: −18.428 mas/yr |
| Parallax (π) | 11.2032 ± 0.1015 mas |
| Distance | 291 ± 3 ly (89.3 ± 0.8 pc) |
| Absolute magnitude (MV) | 1.25 |
| Orbit | |
| Period (P) | 1.5755 d |
| Eccentricity (e) | 0 (adopted) |
| Inclination (i) | 83.18±0.11° |
| Periastron epoch (T) | 2426160.50 JD |
| Semi-amplitude (K1) (primary) | 95.5 km/s |
| Details | |
| DV Aqr Aa | |
| Mass | 1.70 M☉ |
| Radius | 2.756 R☉ |
| Luminosity | 28.8+2.6 −2.4 L☉ |
| Surface gravity (log g) | 3.97 cgs |
| Temperature | 7,843±267 K |
| Rotational velocity (v sin i) | 103 km/s |
| Age | 679 Myr |
| DV Aqr Ab | |
| Mass | 1.01 M☉ |
| Radius | 1.149 R☉ |
| Surface gravity (log g) | 4.334 cgs |
| Temperature | 6,056±240 K |
| Other designations | |
| BD−15° 5848, HD 199603, HIP 103545, HR 8024, SAO 164027 | |
| Database references | |
| SIMBAD | data |
DV Aquarii is a binary star system in the zodiac constellation of Aquarius, near the border with Capricornus. It has a peak apparent visual magnitude of 5.89, which is bright enough to be visible to the naked eye. The distance can be estimated from its annual parallax shift of 11.2 mas, yielding a separation of 291 light years.
This is a detached eclipsing binary system of the Beta Lyrae type. The orbital period for the system is 1.5755 days and the eccentricity is unknown and probably non-zero; the orbital inclination is estimated to be 83.18°±0.11°. During the primary eclipse the magnitude drops to 6.25. It descends to 6.10 with the secondary eclipse (with 6.10 being brighter than 6.25). The pair have been identified as candidate Herbig Ae/Be stars, and catalogued as A-type shell stars.
A magnitude 10.8 star with the designation HD 358087 is a common proper motion companion. It is located at an angular separation of 129″ and has 78% of the Sun's mass. If it is gravitationally bound to the main system, the orbital period is estimated to be around 611,855 years
This star was a part of the obsolete constellation Norma Nilotica.
References
- Okazaki, A.; Yamasaki, A.; Nurwendaya, C.; Malasan, H. L. (January 1985). "Photometric observations and analysis of the close binary system DV Aquarii". Publications of the Astronomical Society of the Pacific. 97: 62–66. Bibcode:1985PASP...97...62O. doi:10.1086/131497. S2CID 121673757.
- ^ 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.
- ^ Avvakumova, E. A.; et al. (October 2013). "Eclipsing variables: Catalogue and classification" (PDF). Astronomische Nachrichten. 334 (8): 860. Bibcode:2013AN....334..860A. doi:10.1002/asna.201311942. hdl:10995/27061.
- Houk, Nancy; Smith-Moore, M. (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 4. Ann Arbor: Dept. of Astronomy, University of Michigan. Bibcode:1988mcts.book.....H.
- ^ Adelman, Saul J. (2002). "On the Periods of the Magnetic CP Stars". Baltic Astronomy. 11: 475–485. Bibcode:2002BaltA..11..475A.
- Watson, Christopher (April 19, 2012). "DV Aquarii". The International Variable Star Index. American Association of Variable Star Observers. Retrieved 2015-06-04.
- Kharchenko, N. V.; et al. (2004). "Astrophysical supplements to the ASCC-2.5. II. Membership probabilities in 520 Galactic open cluster sky areas". Astronomische Nachrichten. 325 (9): 740–748. Bibcode:2004AN....325..740K. doi:10.1002/asna.200410256.
- ^ Paffhausen, W.; Seggewiss, W. (April 1976). "Spectroscopic orbits of the eclipsing binaries DV and DX Aqr". Astronomy and Astrophysics Supplement Series. 24: 29–34. Bibcode:1976A&AS...24...29P.
- ^ Polubek, G. (December 2001). "DV Aquarii Revisited". Odessa Astronomical Publications. 14: 65–68. Bibcode:2001OAP....14...65P.
- ^ Tokovinin, A.; et al. (2008). Tertiary companions to close spectroscopic binaries. Vol. 450. Berlin Heidelberg. p. 129. arXiv:astro-ph/0601518. Bibcode:2006yCat..34500681T. doi:10.1051/0004-6361:20054427. ISBN 978-3-540-74744-4. S2CID 8899546.
{{cite book}}:|journal=ignored (help) - ^ Zorec, J.; Royer, F. (January 2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. S2CID 55586789.
- ^ 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.
- "HD 199603". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 August 2018.
- Corporon, P.; Lagrange, A.-M. (May 1999). "A search for spectroscopic binaries among Herbig Ae/Be stars". Astronomy and Astrophysics Supplement. 136 (3): 429–444. Bibcode:1999A&AS..136..429C. doi:10.1051/aas:1999225.
- Hauck, B.; Jaschek, C. (February 2000). "A-shell stars in the Geneva system". Astronomy and Astrophysics. 354: 157–162. Bibcode:2000A&A...354..157H.
- "HD 358087". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 August 2018.
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