View source for Astronomy:XTE J1550–564

{{Short description|Star in the constellation Norma}}
{{Starbox begin
|name=XTE J1550-564
}}
{{Starbox image
| image = [[Image:V381NorLightCurve.png|250px]]
| caption = The [[Astronomy:Photometric system#Photometric letters|visual band]] [[Astronomy:Light curve|light curve]] of a flare on V381 Normae, adapted from Poutanen ''et al.'' (2014)<ref name="Poutanen"/>
}}
{{Starbox observe
|epoch=J2000
|ra={{RA|15|50|58.78}}<ref name=SIMBAD>{{cite simbad|title=V* V381 Nor|access-date=18 August 2015}}</ref>
|dec={{DEC|-56|28|35.0}}<ref name=SIMBAD/>
|appmag_v=16.6 
|constell=[[Astronomy:Norma (constellation)|Norma]]
}}
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{{Starbox catalog
|names=V381 Normae<ref name=SIMBAD/>
}}
{{Starbox reference|Simbad=V381+Nor}}
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'''XTE J1550-564''', sometimes abbreviated to '''J1550''' and also known as '''V381 Normae''', is a [[Astronomy:X-ray binary#Low-mass X-ray binary|low-mass X-ray binary]] in the constellation [[Astronomy:Norma (constellation)|Norma]]. It is composed of a [[Astronomy:Black hole|black hole]] around 10 times as massive as the [[Astronomy:Sun|Sun]],<ref name="Steiner 2011">{{cite journal|author1=Steiner, James F. |author2=Reis, Rubens C. |author3=McClintock, Jeffrey E. |author4=Narayan, Ramesh |author5=Remillard, Ronald A. |author6=Orosz, Jerome A. |author7=Gou, Lijun |author8=Fabian, Andrew C. |author9=Torres, Manuel A. P. |date=2011|title=The spin of the black hole microquasar XTE J1550-564 via the continuum-fitting and Fe-line methods|journal=Monthly Notices of the Royal Astronomical Society|volume=416|issue=2|pages=941–58 | doi=10.1111/j.1365-2966.2011.19089.x |bibcode=2011MNRAS.416..941S|arxiv = 1010.1013 |s2cid=53399981 }}</ref> and a star of spectral type K3III. The black hole fires out [[Astronomy:Astrophysical jet|jets]] of matter that are thought to arise from an [[Astronomy:Accretion disk|accretion disk]], and is hence known as a [[Astronomy:Microquasar|microquasar]].<ref name="Steiner 2011"/>

==References==
{{Reflist|refs=

<ref name="Poutanen">{{cite journal |last1=Poutanen |first1=Juri |last2=Veledina |first2=Alexandra |last3=Revnivtsev |first3=Mikhail G. |title=Colours of black holes: infrared flares from the hot accretion disc in XTE J1550–564 |journal=Monthly Notices of the Royal Astronomical Society |date=December 2014 |volume=445 |issue=4 |pages=3987–3998 |doi=10.1093/mnras/stu1989 |url=https://ui.adsabs.harvard.edu/abs/2014MNRAS.445.3987P |access-date=3 February 2022|arxiv=1409.6504 |bibcode=2014MNRAS.445.3987P }}</ref>

}}

{{Stars of Norma}}

{{DEFAULTSORT:XTE J1550-564}}
[[Category:Norma (constellation)]]
[[Category:Objects with variable star designations|Normae, V381]]
[[Category:X-ray binaries]]
[[Category:K-type giants]]
[[Category:Stellar black holes]]



{{Sourceattribution|XTE J1550–564}}