Astronomy:4U 1543-475

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IL Lupi
Observation data
Epoch J2000.0   Equinox (celestial coordinates)
Constellation Lupus
Right ascension  15h 47m 08.27687s[1]
Declination −47° 40′ 10.2846″[1]
Apparent magnitude (V) 11.96[2] (14.6 - 16.7)[3]
Characteristics
Evolutionary stage main sequence[4]
Spectral type A2 V + black hole[5]
Variable type XNG[3]
Astrometry
Proper motion (μ) RA: −7.543[1] mas/yr
Dec.: −5.356[1] mas/yr
Parallax (π)0.1909 ± 0.0551[1] mas
Distanceapprox. 17,000 ly
(approx. 5,000 pc)
Details
donor star
Mass2.45±0.15[6] M☉
Radius2.84±0.11[5] R☉
Luminosity48±11[5] L☉
Surface gravity (log g)3.82[7] cgs
Temperature9,000±500[5] K
Metallicity [Fe/H]−0.11[8] dex
black hole
Mass9.4±2.0[9] M☉
Other designations
4U 1543-47, IL Lup, 2MASS J15470829-4740103[10]
Database references
SIMBADdata

4U 1543-475 is a recurrent X-ray transient[11] located in the southern constellation Lupus, the wolf. IL Lupi is its variable star designation. It has an apparent magnitude that fluctuates between 14.6 and 16.7, making it readily visible in large telescopes but not to the naked eye. The object is located relatively far at a distance of approximately 17,000 light years based on Gaia DR3 parallax measurements.

4U 1543-475 was first observed by Uhuru in 1971.[12] In 1976, 4U 1543-475's spectrum was observed. However, its status as a black hole binary had not been confirmed until 1984 by astronomer S. Kiamoto and colleagues.[13] After subsequent observations, it was given the variable star designation IL Lupi in 1995. 4U 1543-475 erupted three times.[citation needed]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 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.
  2. ↑ Alfonso-Garzón, J.; Domingo, A.; Mas-Hesse, J. M.; Giménez, A. (26 November 2012). "The first INTEGRAL-OMC catalogue of optically variable sources". Astronomy & Astrophysics 548: A79. doi:10.1051/0004-6361/201220095. ISSN 0004-6361. Bibcode: 2012A&A...548A..79A. 
  3. ↑ 3.0 3.1 Samus’, N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (January 2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports 61 (1): 80–88. doi:10.1134/S1063772917010085. ISSN 1063-7729. Bibcode: 2017ARep...61...80S. 
  4. ↑ Kolb, U. (21 June 1998). "Soft X-ray transients in the Hertzsprung gap". Monthly Notices of the Royal Astronomical Society 297 (2): 419–426. doi:10.1046/j.1365-8711.1998.01489.x. ISSN 0035-8711. Bibcode: 1998MNRAS.297..419K. 
  5. ↑ 5.0 5.1 5.2 5.3 Orosz, Jerome A.; Jain, Raj K.; Bailyn, Charles D.; McClintock, Jeffrey E.; Remillard, Ronald A. (20 May 1998). "Orbital Parameters for the Soft X‐Ray Transient 4U 1543−47: Evidence for a Black Hole". The Astrophysical Journal 499 (1): 375–384. doi:10.1086/305620. ISSN 0004-637X. Bibcode: 1998ApJ...499..375O. 
  6. ↑ Ritter, H.; Kolb, U. (26 May 2003). "Catalogue of cataclysmic binaries, low–mass X-ray binaries and related objects (Seventh edition)". Astronomy & Astrophysics 404 (1): 301–303. doi:10.1051/0004-6361:20030330. ISSN 0004-6361. Bibcode: 2003A&A...404..301R. 
  7. ↑ Stassun, Keivan G. et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S. 
  8. ↑ Anders, F. et al. (February 2022). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5". Astronomy & Astrophysics 658: A91. doi:10.1051/0004-6361/202142369. ISSN 0004-6361. Bibcode: 2022A&A...658A..91A. 
  9. ↑ Özel, Feryal; Psaltis, Dimitrios; Narayan, Ramesh; McClintock, Jeffrey E. (2 December 2010). "The Black Hole Mass Distribution in the Galaxy". The Astrophysical Journal 725 (2): 1918–1927. doi:10.1088/0004-637X/725/2/1918. ISSN 0004-637X. Bibcode: 2010ApJ...725.1918O. 
  10. ↑ "V* IL Lup". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=V%2A+IL+Lup. 
  11. ↑ Palombara, Nicola La; Mereghetti, Sandro (2 February 2008). "XMM-Newton observation of 4U 1543–475: The X-ray spectrum of a stellar-mass black-hole at low luminosity". Astronomy & Astrophysics 430 (2005): L53–L56. doi:10.1051/0004-6361:200400123. Bibcode: 2005A&A...430L..53L. 
  12. ↑ MATiLSKY, T. A.; Giacconi, R.; Gursky, H.; Kellogg, E. M.; Tananbaum, H. D. (15 May 1972). "A New Transient Source Observed by UHURU". The Astrophysical Journal 174: L53–L55. doi:10.1086/180947. Bibcode: 1972ApJ...174L..53M. 
  13. ↑ Kitamoto, S.; Miyamoto, S.; Tsunemi, H; Makishima, K; Nakagawa, M (1 June 1984). "The transient X-ray source 4U 1543-47 observed from TENMA". Publications of the Astronomical Society of Japan 36 (4): 799–806. Bibcode: 1984PASJ...36..799K. 



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