Astronomy:NGC 300 X-1
300px Artistic representation of NGC 300 X-1 | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Sculptor |
| Right ascension | 00h 55m 09.99s[1] |
| Declination | −37° 42′ 12.2″[1] |
| Characteristics | |
| Evolutionary stage | Black hole + Wolf-Rayet |
| Spectral type | WNE |
| Astrometry | |
| Distance | 6,070,000±0.23[2] ly |
| Details[3] | |
| Black hole | |
| Mass | 17±4 M☉ |
| WR | |
| Mass | 26+7 −5 M☉ |
| Other designations | |
NGC 300 X-1, 2XMM J005510.0-374212, CXOU J005510.0-374212[1] | |
| Database references | |
| SIMBAD | data |
NGC 300 X-1 is a high mass X-ray binary system located in the spiral galaxy NGC 300, approximately 6 million light-years away in the constellation of Sculptor.[4][5] It consists of a stellar-mass black hole orbiting a Wolf–Rayet star (specifically of WN spectral type), making it one of only a few confirmed extragalactic Wolf–Rayet-black hole binary systems, the other prominent example being IC 10 X-1.[3][6]
Observation
The system was first identified as an X-ray source, with periodic variability suggesting an orbital period.[7] Subsequent spectroscopic observations using the Very Large Telescope (VLT) with the FORS2 instrument confirmed the association by detecting radial velocity variations in the He II λ4686 emission line of the Wolf–Rayet star (designated #41 in NGC 300), yielding an orbital period of 32.3±0.2 h, consistent with the X-ray period.[5]
The black hole has a mass of 17±4 M☉ and the WR star has a mass of 26+7
−5 M☉. Both objects orbit each other at a distance of about 18.2 R☉.[3]
References
- ↑ 1.0 1.1 1.2 "CXOU J005510.0-374212". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=CXOU+J005510.0-374212.
- ↑ Rizzi, Luca; Bresolin, Fabio; Kudritzki, Rolf-Peter; Gieren, Wolfgang; Pietrzyński, Grzegorz (2006-02-20). "The Araucaria Project: The Distance to NGC 300 from the Red Giant Branch Tip Using HST ACS Imaging" (in en). The Astrophysical Journal 638 (2): 766–771. doi:10.1086/498705. ISSN 0004-637X.
- ↑ 3.0 3.1 3.2 Binder, Breanna A.; Sy, Janelle M.; Eracleous, Michael; Christodoulou, Dimitris M.; Bhattacharya, Sayantan; Cappallo, Rigel; Laycock, Silas; Plucinsky, Paul P. et al. (2021-03-01). "The Wolf–Rayet + Black Hole Binary NGC 300 X-1: What is the Mass of the Black Hole?". The Astrophysical Journal 910 (1): 74. doi:10.3847/1538-4357/abe6a9. ISSN 0004-637X.
- ↑ Crowther, P. A.; Barnard, R.; Carpano, S.; Clark, J. S.; Dhillon, V. S.; Pollock, A. M. T. (2010-03-01). "NGC 300 X-1 is a Wolf-Rayet/black hole binary" (in en). Monthly Notices of the Royal Astronomical Society: Letters 403 (1): L41–L45. doi:10.1111/j.1745-3933.2010.00811.x. ISSN 1745-3933.
- ↑ 5.0 5.1 information@eso.org. "The black hole inside NGC 300 X-1 (artist's impression)" (in en). https://www.eso.org/public/images/eso1004a/.
- ↑ "NGC 300 X-1 Fact Sheet - StarDate's Black Hole Encyclopedia". https://blackholes.stardate.org/objects/factsheet-NG-300-X-1.html.
- ↑ Carpano, S.; Pollock, A. M. T.; Prestwich, A.; Crowther, P.; Wilms, J.; Yungelson, L.; Ehle, M. (2007-05-01). "A 33 hour period for the Wolf-Rayet/black hole X-ray binary candidate NGC 300 X-1" (in en). Astronomy & Astrophysics 466 (2): L17–L20. doi:10.1051/0004-6361:20077363. ISSN 0004-6361.
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