Aquila X-1

Star in the constellation Aquila

Aquila X-1

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 J2000.0 (ICRS)
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
V1333 Aql, 2MASS J19111604+0035058[5]
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

[edit]

1. ^ a b 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\. arXiv:astro-ph/9901075. Bibcode:1999ApJ...518..422G. doi:10.1086/307283. S2CID 14797125. Retrieved 22 October 2021.
2. ^ a b 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.
3. ^ a b 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, arXiv:1609.00392, Bibcode:2017MNRAS.464L..41M, doi:10.1093/mnrasl/slw172, S2CID 118355519.
4. ^ a b 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, arXiv:1304.4033, Bibcode:2013MNRAS.432.1695C, doi:10.1093/mnras/stt604, S2CID 118473178.
5. ^ "X Aql X-1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-21.`{{cite web}}`: CS1 maint: postscript (link)
6. ^ 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, arXiv:2102.01181, doi:10.1093/mnras/stab159

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Constellation of Aquila

* Aquila in Chinese astronomy
* List of stars in Aquila

Stars|

| Bayer|

* α (Altair)
* β (Alshain)
* γ (Tarazed)
* δ
* ε
* ζ (Okab)
* η
* θ (Antinous)
* ι
* κ
* λ
* μ
* ν
* ξ (Libertas)
* ο
* π
* σ
* τ (Tianfu)
* υ
* φ
* χ
* ψ
* ω1
* ω2

|

Flamsteed|

* 4
* 5
* 7
* 8
* 10
* 11
* 12 (i)
* 14 (g)
* 15 (h)
* 18
* 19
* 20
* 21
* 22
* 23
* 24
* 26 (f)
* 27 (d)
* 28 (A)
* 31 (b)
* 35 (c)
* 36 (e)
* 37 (k)
* 42
* 45
* 46
* 51
* 56
* 57
* 58
* 62
* 64
* 66
* 68
* 69
* 70
* 71 (l)
* 14 Sge (y Sge)
* 62 Ser
* 64 Sgr

Variable|

* R
* U
* V
* W
* TT
* EL
* FF
* QS
* V368
* V450
* V500
* V603
* V604
* V605
* V606
* V923
* V1286
* V1291
* V1298
* V1302
* V1315
* V1333
* V1339
* V1370
* V1427
* V1428
* V1429
* V1472
* V1487
* V1494
* V1654
* V1672
* V1691
* V1703 (Phoenicia)
* V1828
* V1936

HR|

* 7099
* 7143
* 7288
* 7300
* 7307
* 7396
* 7456
* 7569
* 7598
* 7599
* 7693
* 7717
* 7803

HD|

* 179079
* 183263
* 187734
* 192699 (Chechia)

Other|

* CoRoT-2
* CoRoT-3
* CoRoT-8
* Gaia BH3
* HAT-P-41
* Hulse–Taylor pulsar
* PSR J1856+0245
* PSR J1903+0327
* PSR J1951+1123
* SGR 1900+14
* SS 433
* W43A
* W49-2
* WASP-80 (Petra)
* WD J1953−1019
* ZTF J1901+1458

| Exoplanets|

* CoRoT-2b
* CoRoT-3b
* CoRoT-8b
* CoRoT-10b
* HD 179079 b
* HD 183263 b
* c
* HD 192263 b
* HD 192699 b
* ξ Aquilae b

|

| Star clusters|

* NGC 6709
* NGC 6738
* NGC 6755
* NGC 6756
* NGC 6760
* NGC 6863

|

Nebulae|

| NGC|

* 6741
* 6751
* 6778
* 6781
* 6790

|

Other|

* Abell 48
* Abell 70
* E Nebula
* Hen 2-428
* HESS J1857+026
* Kesteven 75
* Smith's Cloud
* W43
* W49
* W49B
* W50

Galaxies|

| NGC|

* 6814

|

Other|

* IC 1327

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