Astronomy:Aquila X-1
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Short description: Star in the constellation Aquila
 A visual band light curve for Aquila X-1 during a July 1996 outburst, adapted from Garcia et al. (1999)[1] | |
| Observation data Epoch J2000.0 Equinox (celestial coordinates) | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 11m 16.05720s[2] |
| Declination | +00° 35′ 05.8767″[2] |
| Characteristics | |
| Spectral type | K4[3] |
| Variable type | LMXB[4] |
| Other designations | |
| Database references | |
| SIMBAD | data |
Aquila X-1 (frequently abbreviated to Aql X-1) is a low-mass x-ray binary (LMXB) and the most luminous X-Ray source in the constellation Aquila. It was first observed by the satellite Vela 5B which detected several outbursts from this source between 1969 and 1976.[4] Its optical counterpart is variable, so it was named V1333 Aql according to the IAU standards. The system hosts a neutron star that accretes matter from a main sequence star of spectral type K4.[3] The binary's orbital period is 18.9479 hours.[1]
The neutron star radiation flux is slightly variable due to the nuclear burning of the accreted helium on the surface.[6]
References
- ↑ 1.0 1.1 Garcia, Michael R.; Callanan, Paul J.; McCarthy, John; Eriksen, Kristoffer; Hjellming, Robert M. (June 1999). "Aquila X-1 in Outburst and Quiescence". The Astrophysical Journal 518 (1): 422–427. doi:10.1086/307283. Bibcode: 1999ApJ...518..422G. https://doi.org/10.1086/307283. Retrieved 22 October 2021.
- ↑ 2.0 2.1 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.
- ↑ 3.0 3.1 Mata Sánchez, D. et al. (2017), "The donor of Aquila X-1 revealed by high-angular resolution near-infrared spectroscopy", Monthly Notices of the Royal Astronomical Society Letters 464 (1): L41–L45, doi:10.1093/mnrasl/slw172, Bibcode: 2017MNRAS.464L..41M.
- ↑ 4.0 4.1 Campana, S. et al. (2013), "Mining the Aql X-1 long term X–ray light curve", Monthly Notices of the Royal Astronomical Society 432 (2): 1695–1700, doi:10.1093/mnras/stt604, Bibcode: 2013MNRAS.432.1695C.
- ↑ "X Aql X-1". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=X+Aql+X-1.
- ↑ Mancuso, G. C.; Altamirano, D.; Méndez, M.; Lyu, M.; Combi, J. A. (2021), "Drifts of the marginally stable burning frequency in the X-ray binaries 4U 1608–52 and Aql X–1", Monthly Notices of the Royal Astronomical Society 502 (2): 1856–1863, doi:10.1093/mnras/stab159
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