| 词条 | Circinus X-1 |
| 释义 |
|image= |caption=X-ray image of Circinus X-1 |credit=Chandra X-ray Observatory }}{{Starbox observe |epoch=J2000 |constell=Circinus |ra={{RA|15|20|40.85}}[1] |dec={{DEC|-57|10|00.1}}[1] |appmag_v=21.40[2] }}{{Starbox character |class=B5–A0 I[3] |variable=HMXB[4] }}{{Starbox astrometry |dist_pc={{val|9400|+800|-1000}}[5] |dist_ly={{val|31000|+2600|-3300}} }}{{Starbox orbit |reference=[3] |period_unitless=16.68 ± 0.15 d |periastron={{nowrap|JD 2453473.8 ± 0.4}} |eccentricity=0.45 ± 0.07 |periarg=2 ± 12 |k1=25 ± 2 }}{{Starbox catalog |names={{odlist|V=BR Cir|name=INTREF 645|2MASS=J15204084-5710001|name2=2U 1516-56}}[4] }}{{Starbox reference |Simbad=V*+BR+Cir }}{{Starbox end}}Not to be confused with Cygnus X-1 Circinus X-1 is an X-ray binary star system that includes a neutron star. Observation of Circinus X-1 in July 2007 revealed the presence of X-ray jets normally found in black hole systems; it is the first of the sort to be discovered that displays this similarity to black holes. Circinus X-1 may be among the youngest X-ray binaries observed. Location, distanceOn June 14, 1969, an Aerobee 150 rocket, launched from Natal, Rio Grande do Norte, Brazil, obtained X-ray data during a scan of the Norma-Lupus-Circinus region that detected a well-isolated source at ℓ = 321.4±0.9° b = -0.5±2° (galactic), RA {{RA|15|14}} Dec {{Dec|-57|49}} within the constellation Circinus and referred to as Circinus XR-1 (Cir XR-1).[6] The distance of Circinus X-1 was not well established, with a low estimate of 13,400 light years[7] and high estimate of 26,000 light years.[8] On June 23, 2015, an article published on NASA's Chandra X-Ray Observatory's website, revealed that an international team of astronomers has succeeded in determining its distance from Earth with more precision - via a method of triangulation of X-ray light emitted by the star, echoing through stellar clouds and interstellar dust - as being about 30,700 light-years.[9] X-ray source and age related to supernova remnantA 16.6 day X-ray period was found by Kaluzienski et al.[10] The X-ray source is assumed to be a neutron star as part of a low-mass X-ray binary (LMXB), type-I X-ray burster.[11] The X-ray and radio nebulae surrounding Circinus X-1 have properties consistent with a young supernova remnant. This rare case of an X-ray binary apparently associated with a supernova remnant suggests the binary is very young on cosmic time scales, possibly less than 4600 years old.[12] An association of Circinus X-1 with a different nearby supernova remnant, G321.9-0.3, has been ruled out.[11] Other spectral regionsThe binary nature of Cir X-1 has been established.[13] The binary's radio component and a possible visual counterpart were identified by Whelan et al.[14] Its infrared counterpart was located and found to flare with a 16.6-day period by Glass.[15] A (heavily reddened) precise optical counterpart (now known as BR Cir) was identified by Moneti.[16] References1. ^1 {{cite journal|title=2MASS All-Sky Catalog of Point Sources|date=2003|journal=VizieR On-line Data Catalog|volume=2246|author=Cutri, R. M.|display-authors=etal|bibcode=2003yCat.2246....0C}} 2. ^{{cite journal|doi=10.1051/0004-6361:20077303|title=A catalogue of low-mass X-ray binaries in the Galaxy, LMC, and SMC (Fourth edition)|journal=Astronomy & Astrophysics|volume=469|issue=2|pages=807|year=2007|last1=Liu|first1=Q. Z|last2=Van Paradijs|first2=J|last3=Van Den Heuvel|first3=E. P. J|arxiv=0707.0544|bibcode=2007A&A...469..807L}} 3. ^1 {{cite journal|doi=10.1111/j.1365-2966.2006.11210.x|title=Detection of the radial velocity curve of the B5-A0 supergiant companion star of Cir X-1?|journal=Monthly Notices of the Royal Astronomical Society|volume=374|issue=3|pages=999|year=2007|last1=Jonker|first1=P. G|last2=Nelemans|first2=G|last3=Bassa|first3=C. G|arxiv=astro-ph/0605497|bibcode=2007MNRAS.374..999J}} 4. ^1 {{cite simbad|title=V* BR Cir|accessdate=22 September 2017}} 5. ^{{cite journal|doi=10.1088/0004-637X/806/2/265|title=Lord of the Rings: A Kinematic Distance to Circinus X-1 from a Giant X-Ray Light Echo Lord of the Rings: A Kinematic Distance to Circinus X-1 from a Giant X-Ray Light Echo|journal=The Astrophysical Journal|volume=806|issue=2|pages=265|year=2015|last1=Heinz|first1=S|last2=Burton|first2=M|last3=Braiding|first3=C|last4=Brandt|first4=W. N|last5=Jonker|first5=P. G|last6=Sell|first6=P|last7=Fender|first7=R. P|last8=Nowak|first8=M. A|last9=Schulz|first9=N. S|arxiv=1506.06142|bibcode=2015ApJ...806..265H}} 6. ^{{ cite journal |author=Margon B|author2=Lampton M|author3=Bowyer S|author4=Cruddace R |title=A Pulsing X-Ray Source in Circinus |journal=Astrophys. J. |date=Oct 1971 |volume=169 |issue=10 |pages=L23–5 |bibcode=1971ApJ...169L..23M |doi=10.1086/180806 }} 7. ^{{cite journal|display-authors=4|author=R. Iaria|author2=M. Spano|author3=T. DiSalvo|author4=N.R. Robba|author5=L. Burderi|author6=R. Fender|author7=M. Van Der Klis|author8=F. Frontera|title=On The Soft Excess In The X-Ray Spectrum Of Circinus X-1: Revisitation Of The Distance To Circinus X-1|journal=The Astrophysical Journal|date=January 2005|volume=619|issue=1|pages=503–516|doi=10.1086/426422|url=http://iopscience.iop.org/0004-637X/619/1/503/pdf/0004-637X_619_1_503.pdf|accessdate=5 December 2013|arxiv = astro-ph/0410259 |bibcode = 2005ApJ...619..503I }} 8. ^{{cite web|title=Circinus X-1: Neutron Stars Join The Black Hole Jet Set|url=http://chandra.harvard.edu/photo/2007/cirx1/|publisher=Harvard-Smithsonian Center for Astrophysics|accessdate=5 December 2013}} 9. ^{{Cite web|title = NASA’s Chandra Captures X-Ray Echoes Pinpointing Distant Neutron Star|url = http://www.nasa.gov/press-release/nasa-s-chandra-captures-x-ray-echoes-pinpointing-distant-neutron-star|accessdate = 2015-06-24}} 10. ^{{cite journal|author=Kaluzienski, L. J.|author2=Holt, S. S.|author3=Boldt, E. A.|author4=Serlemitsos, P. J.|title=Evidence for a 16.6 day period from Circinus X-1|journal=Astrophysical Journal|date=1976|volume=208|pages=L71–L75|bibcode = 1976ApJ...208L..71K |doi = 10.1086/182235 }} 11. ^1 {{ cite journal |doi=10.1051/0004-6361:20020224 |author=Mignani RP |author2=De Luca A |author3=Caraveo PA |author3-link=Patrizia A. Caraveo |author4=Mirabel IF |title=HST observations rule out the association between Cir X-1 and SNR G321.9-0.3 |journal=Astron. Astrophys. |date=2002 |volume=386 |issue=2 |pages=487–91 |url=http://cat.inist.fr/?aModele=afficheN&cpsidt=13588025 |bibcode=2002A&A...386..487M|arxiv = astro-ph/0202268 }} 12. ^{{cite journal|display-authors=4|author=S. Heinz|author2=P. Sell|author3=R.P. Fender|author4=P.G. Jonker|author5=W.N. Brandt|author6=D.E. Calvelo-Santos|author7=A.K. Tzioumis|author8=M.A. Nowak|author9=N.S. Schulz|author10=R. Wijnands|author11=M. Van Der Klis|title=The Youngest Known X-ray Binary: Circinus X-1 and its Natal Supernova Remnant|journal=The Astrophysical Journal|date=December 2013|volume=779|issue=2|doi=10.1088/0004-637X/779/2/171|arxiv = 1312.0632 |bibcode = 2013ApJ...779..171H|pages=171}} 13. ^{{ cite journal |author=Jones C|author2=Tananbaum H|author3=Giacconi R |title=UHURU Observations of the Binary Nature of Circinus X-1 |journal=141st Meeting Amer Astron Soc |volume=5|pages=395|location=Tucson, Arizona |date=1973 |bibcode=1973BAAS....5..395J }} 14. ^{{cite journal|display-authors= 4|author= Whelan, J. A. J.|author2= Mayo, S. K.|author3= Wickramasinghe, D. T.|author4= Murdin, P. G.|author5= Peterson, B. A.|author6= Hawarden, T. G.|author7= Longmore, A. J.|author8= Haynes, R. F.|author9= Goss, W. M.|author10= Simons, L. W.|author11= Caswell, J. L.|author12= Little, A. G.|author13= McAdam, W. B.|journal=Monthly Notices of the Royal Astronomical Society|date=1977|volume=181|issue= 2|pages=259–271|bibcode=1977MNRAS.181..259W|title=The optical and radio counterpart of Circinus X-1 /3U 1516-56/ | doi = 10.1093/mnras/181.2.259 }} 15. ^{{cite journal|last=Glass|first=I.S.|title=Variations of Circinus X-1 in the infrared|journal=Monthly Notices of the Royal Astronomical Society|date=1978|volume=183|issue=3|pages=335–340|bibcode = 1978MNRAS.183..335G | doi = 10.1093/mnras/183.3.335 }} 16. ^{{cite journal|last=Moneti|first=A.|journal=Astronomy and Astrophysics|title=Optical and infrared observations of Circinus X-1|date=1992|volume=260|pages=L7–L10|bibcode = 1992A&A...260L...7M }}
External links{{Stars of Circinus}}{{Multi-star-stub}} 3 : X-ray binaries|Circinus (constellation)|Objects with variable star designations |
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