GQ Muscae

{{Short description|Nova in the constellation Musca}} {{Starbox begin}} {{Starbox image | image = [[Image:GQMusLightCurve.png|250px]] | caption = A [[Photometric_system#Photometric_letters|visual band]] [[light curve]] for GQ Muscae. The main plot shows the decline from the 1983 eruption, plotted with data from the AAVSO,<ref name="aavso"/> Whitelock ''et al.''<ref name="Whitelock"/> and Liller.<ref name=liller90/> The inset plot (adapted from Narloch ''et al.''<ref name="Narloch"/>) shows the post-eruption variability seen in 1992. }} {{Starbox observe | epoch = J2000 | constell = [[Musca (constellation)|Musca]] | ra = {{RA|11|52|02.4285}}<ref name="Gaia DR2"/> | dec = {{DEC|-67|12|20.991}}<ref name="Gaia DR2"/> | appmag_v = 7.2 Max. 21 Min.<ref name="Schaefer2018"/> }} {{Starbox character | class = | b-v = | u-b = | variable = [[Nova]]<ref name="Schaefer2018"/> }} {{Starbox astrometry | radial_v = | prop_mo_ra = {{val|−5.056|0.451}}<ref name="Gaia DR2"/> | prop_mo_dec = {{val|1.193|0.324}}<ref name="Gaia DR2"/> | parallax = 0.4702 | p_error = 0.2193 | parallax_footnote = <ref name="Gaia DR2"/> | dist_pc = {{val|2480|3780|300}}<ref name="Schaefer2018"/> | absmag_v = }} {{Starbox catalog | names = {{odlist | name=[[American Association of Variable Star Observers|AAVSO]] 1147-66 | name2=Nova Mus 1983 | Gaia DR2=5236081560713688448 }}<ref name="Simbad"/> }} {{Starbox reference | Simbad = GQ+Mus }} {{Starbox end}}

'''GQ Muscae''', also known as '''Nova Muscae 1983''' is a [[nova]] in the [[constellation]] [[Musca (constellation)|Musca]], which was discovered by [[William Liller]] at 03:20 [[Universal Time|UT]] on 18 January 1983.<ref name="IAUC3764"/> At the time of its discovery it was a magnitude ≈7.2 object, and it subsequently faded.<ref name=liller90/><ref name="Izumi"/>

GQ Muscae is a binary star system composed of a white dwarf and small star, the donor star, that is about 10% as massive as the Sun. The two orbit each other every 1.4 hours. The white dwarf accumulates material from the donor star until a runaway nuclear thermonuclear reaction erupts, as it did in 1983.<ref name="Izumi"/> GQ Muscae was the first nova from which X-rays were detected.<ref name="duerbeck"/>

==References== {{Reflist|refs=

<ref name="Narloch">{{cite journal |last1=Narloch |first1=W. |last2=Kaluzny |first2=J. |last3=Krzeminski |first3=W. |last4=Pych |first4=W. |last5=Rozyczka |first5=M. |last6=Shectman |first6=S. |last7=Thompson |first7=I. B. |last8=Tomov |first8=T. |title=New Observations of the Old Magnetic Nova GQ Muscae |journal=Baltic Astronomy |date=January 2014 |volume=23 |pages=1–7 |doi=10.1515/astro-2017-0168 |arxiv=1401.7177 |bibcode=2014BaltA..23....1N |s2cid=119291924 }}</ref>

<ref name="Whitelock">{{cite journal |last1=Whitelock |first1=P. A. |last2=Carter |first2=B. S. |last3=Feast |first3=M. W. |last4=Glass |first4=I. S. |last5=Laney |first5=D. |last6=Menzies |first6=J. W. |last7=Walsh |first7=J. |last8=Williams |first8=P. M. |title=Infrared and optical observations of Nova Mus 1983 |journal=Monthly Notices of the Royal Astronomical Society |date=November 1984 |volume=211 |issue=2 |pages=421–432 |doi=10.1093/mnras/211.2.421 |doi-access=free |bibcode=1984MNRAS.211..421W }}</ref>

<ref name="aavso">{{cite web |title=Download Data |url=https://www.aavso.org/data-download |website=aavso.org |publisher=AAVSO |access-date=1 October 2021}}</ref>

<ref name="duerbeck">{{cite journal|last=Duerbeck|first=H.W.|date=2009|title=New Stars and Telescopes: Nova Research in the Last Four Centuries|journal=Astronomische Nachrichten|volume=330|issue=6|pages=568–73|url=http://www.physics.usyd.edu.au/~laszlo/kepek/400ev_novai.pdf|doi=10.1002/asna.200911218|bibcode=2009AN....330..568D|access-date=2014-03-09|archive-url=https://web.archive.org/web/20150924073139/http://www.physics.usyd.edu.au/~laszlo/kepek/400ev_novai.pdf|archive-date=2015-09-24|url-status=dead}}</ref>

<ref name="Izumi">{{cite journal|author1=Hachisu, Izumi |author2=Kato, Mariko |author3=Cassatella, Angelo |date=2008|title=A Universal Decline Law of Classical Novae. III. GQ Muscae 1983|journal=The Astrophysical Journal|volume=687|issue=2 |pages=1236–52|bibcode=2008ApJ...687.1236H|arxiv = 0806.4253 |doi = 10.1086/591415 |s2cid=50476380 }}</ref>

<ref name="IAUC3764">{{cite journal |last1=Marsden |first1=Brian G. |title=Nova Muscae 1983 |journal=International Astronomical Union Circular |date=20 January 1983 |issue=3764 |url=http://www.cbat.eps.harvard.edu/iauc/03700/03764.html |access-date=30 January 2022}}</ref>

<ref name=liller90>{{cite book|last=Liller|first=William|title=Cambridge Astronomy Guide|publisher=[[CUP Archive]]|location=Cambridge, United Kingdom|date=1990|page=105|isbn=0-521-39915-7|url=https://books.google.com/books?id=yl04AAAAIAAJ&pg=PA105}}</ref>

<ref name="Schaefer2018">{{cite journal | title=The distances to Novae as seen by Gaia | last1=Schaefer | first1=Bradley E. | journal=Monthly Notices of the Royal Astronomical Society | volume=481 | issue=3 | year=2018 | pages=3033–3051 | arxiv=1809.00180 | bibcode=2018MNRAS.481.3033S | doi=10.1093/mnras/sty2388 | doi-access=free | s2cid=118925493 }}</ref>

<ref name="Simbad">{{cite simbad | title=GQ Muscae | accessdate=2019-08-19 }}</ref>

}}

[[Category:Musca]] [[Category:Objects with variable star designations|Muscae, GQ]] [[Category:Novae]]