“DI Chamaeleontis”的意思、由来-开放百科全书

DI Chamaeleontis, also known as Hen 3-593 or HIP 54365, is a quadruple star system in the constellation Chamaeleon. The system is roughly 700 light years from Earth.

DI Cha is a variable star of the T Tauri type, young stellar objects just approaching the main sequence. It varies erratically between visual magnitudes 10.65 and 10.74.^[7] Although it is visually faint, it was noticed because of the prominent emission lines in its spectrum.^[13]

In 1977, DI Cha was observed to have a much fainter companion.^[14] The separation was later measured at 4.6", approximately 644 astronomical units (AU).^[15] The B component was discovered to be a pair of star separated by only 0.066", about 10 AU,^[16] both with spectral type M5.5.^[17] Finally, the variable primary star was found to have a faint companion 0.2" away, of spectral type M6.^[17]

References

1. ^¹²³{{cite journal|bibcode=1985SAAOC...9...55K|title=Optical and infrared photometry of southern early-type shell stars and pre-main-sequence variables|journal=In its South African Astronomical Observatory Circular No. 9 p 55-86 (SEE N86-18271 08-89)|volume=9|author1=Kilkenny|first1=D.|last2=Whittet|first2=D. C. B.|last3=Davies|first3=J. K.|last4=Evans|first4=A.|last5=Bode|first5=M. F.|last6=Robson|first6=E. I.|last7=Banfield|first7=R. M.|year=1985}}
2. ^¹²{{cite journal|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)|journal=VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S|volume=1|display-authors=etal|author1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}
3. ^¹{{cite journal|bibcode=2006A&A...460..695T|arxiv=astro-ph/0609258|title=Search for associations containing young stars (SACY). I. Sample and searching method|journal=Astronomy and Astrophysics|volume=460|issue=3|pages=695|author1=Torres|first1=C. A. O.|last2=Quast|first2=G. R.|last3=Da Silva|first3=L.|last4=de la Reza|first4=R.|last5=Melo|first5=C. H. F.|last6=Sterzik|first6=M.|year=2006|doi=10.1051/0004-6361:20065602}}
4. ^¹²{{cite journal|bibcode=2013A&A...557A..80S|arxiv=1307.1082|title=New companions in the stellar systems of DI Cha, Sz 22, CHXR 32, and Cha Hα 5 in the Chamaeleon I star-forming region|journal=Astronomy & Astrophysics|volume=557|pages=A80|author1=Schmidt|first1=T. O. B.|last2=Vogt|first2=N.|last3=Neuhäuser|first3=R.|last4=Bedalov|first4=A.|last5=Roell|first5=T.|year=2013|doi=10.1051/0004-6361/201220660}}
5. ^¹{{cite journal|bibcode=1963AJ.....68S.280H|title=Emission-Line Stars in an Obscured Region in Chamaeleon|journal=Astronomical Journal|volume=68|pages=280|author1=Henize|first1=Karl G.|year=1963|doi=10.1086/109141}}
6. ^¹{{cite journal|bibcode=1977ApJS...35..161S|title=A survey of southern dark clouds for Herbig-Haro objects and H-alpha emission stars|journal=Astrophysical Journal Supplement Series|volume=35|pages=161|author1=Schwartz|first1=R. D.|year=1977|doi=10.1086/190473}}
7. ^¹{{cite journal|bibcode=1993A&A...278...81R|title=Visual binaries among pre-main sequence stars|journal=Astronomy and Astrophysics|volume=278|pages=81|author1=Reipurth|first1=Bo|last2=Zinnecker|first2=Hans|year=1993}}
8. ^¹{{cite journal|bibcode=2008ApJ...683..844L|arxiv=0803.0561|title=A Multiplicity Census of Young Stars in Chamaeleon I|journal=The Astrophysical Journal|volume=683|issue=2|pages=844–861|author1=Lafrenière|first1=David|last2=Jayawardhana|first2=Ray|last3=Brandeker|first3=Alexis|last4=Ahmic|first4=Mirza|last5=Van Kerkwijk|first5=Marten H.|year=2008|doi=10.1086/590239}}
9. ^¹{{cite journal|bibcode=2013A&A...554A..43D|arxiv=1304.1150|title=Protoplanetary disk evolution and stellar parameters of T Tauri binaries in Chamaeleon I|journal=Astronomy & Astrophysics|volume=554|pages=A43|author1=Daemgen|first1=S.|last2=Petr-Gotzens|first2=M. G.|last3=Correia|first3=S.|last4=Teixeira|first4=P. S.|last5=Brandner|first5=W.|last6=Kley|first6=W.|last7=Zinnecker|first7=H.|year=2013|doi=10.1051/0004-6361/201321220}}

词条	DI Chamaeleontis
释义	References {{Starbox begin \|Name:DI Cha \|Discovered by = Judy Schmidt{{citation needed\|date=December 2015}} }}{{Starbox image \| image = \| caption = Image showing DI Cha A and B, each of which is also an even closer binary, and the surrounding nebulosity. \| credit = ESA/Hubble & NASA Acknowledgement: Judy Schmidt (geckzilla.org). }}{{Starbox observe \| epoch = J2000 \| constell = Chamaeleon \| ra = {{RA\|11\|07\|20.72163}} \| dec = {{DEC\|−77\|38\|07.2903}} \| appmag_v = 10.655^[3] }}{{Starbox character \| class = G0e^[4] \| b-v = +1.144^[3] \| u-b = +0.630^[3] \| variable = T Tau^[7] }}{{Starbox astrometry \| prop_mo_ra = −24.61 \| prop_mo_dec = 3.45 \| parallax = 4.49 \| p_error = 1.59 \| parallax_footnote = \| absmag_v = }}{{Starbox detail \| source = ^[11] \| component1 = Aa \| mass = 1.7 \| radius = 2.00 \| temperature = 6,030 \| luminosity = 4.7 \| age_myr = 7.1 \| component2 = Ba/Bb \| mass2 = 0.18 \| radius2 = 1.13 \| temperature2 = 3,130 \| luminosity2 = 0.11 \| age_myr2 = 3.0 }}{{Starbox catalog \| names=DI Cha, HIP 54365, CD−76°486, WDS J11073-7738, AAVSO 1104-77 }}{{Starbox reference \|Simbad=DI+Char }}{{Starbox end}} DI Chamaeleontis, also known as Hen 3-593 or HIP 54365, is a quadruple star system in the constellation Chamaeleon. The system is roughly 700 light years from Earth. DI Cha is a variable star of the T Tauri type, young stellar objects just approaching the main sequence. It varies erratically between visual magnitudes 10.65 and 10.74.^[7] Although it is visually faint, it was noticed because of the prominent emission lines in its spectrum.^[13] In 1977, DI Cha was observed to have a much fainter companion.^[14] The separation was later measured at 4.6", approximately 644 astronomical units (AU).^[15] The B component was discovered to be a pair of star separated by only 0.066", about 10 AU,^[16] both with spectral type M5.5.^[17] Finally, the variable primary star was found to have a faint companion 0.2" away, of spectral type M6.^[17] References 1. ^¹²³{{cite journal\|bibcode=1985SAAOC...9...55K\|title=Optical and infrared photometry of southern early-type shell stars and pre-main-sequence variables\|journal=In its South African Astronomical Observatory Circular No. 9 p 55-86 (SEE N86-18271 08-89)\|volume=9\|author1=Kilkenny\|first1=D.\|last2=Whittet\|first2=D. C. B.\|last3=Davies\|first3=J. K.\|last4=Evans\|first4=A.\|last5=Bode\|first5=M. F.\|last6=Robson\|first6=E. I.\|last7=Banfield\|first7=R. M.\|year=1985}} 2. ^¹²{{cite journal\|bibcode=2009yCat....102025S\|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)\|journal=VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S\|volume=1\|display-authors=etal\|author1=Samus\|first1=N. N.\|last2=Durlevich\|first2=O. V.\|year=2009}} 3. ^¹{{cite journal\|bibcode=2006A&A...460..695T\|arxiv=astro-ph/0609258\|title=Search for associations containing young stars (SACY). I. Sample and searching method\|journal=Astronomy and Astrophysics\|volume=460\|issue=3\|pages=695\|author1=Torres\|first1=C. A. O.\|last2=Quast\|first2=G. R.\|last3=Da Silva\|first3=L.\|last4=de la Reza\|first4=R.\|last5=Melo\|first5=C. H. F.\|last6=Sterzik\|first6=M.\|year=2006\|doi=10.1051/0004-6361:20065602}} 4. ^¹²{{cite journal\|bibcode=2013A&A...557A..80S\|arxiv=1307.1082\|title=New companions in the stellar systems of DI Cha, Sz 22, CHXR 32, and Cha Hα 5 in the Chamaeleon I star-forming region\|journal=Astronomy & Astrophysics\|volume=557\|pages=A80\|author1=Schmidt\|first1=T. O. B.\|last2=Vogt\|first2=N.\|last3=Neuhäuser\|first3=R.\|last4=Bedalov\|first4=A.\|last5=Roell\|first5=T.\|year=2013\|doi=10.1051/0004-6361/201220660}} 5. ^¹{{cite journal\|bibcode=1963AJ.....68S.280H\|title=Emission-Line Stars in an Obscured Region in Chamaeleon\|journal=Astronomical Journal\|volume=68\|pages=280\|author1=Henize\|first1=Karl G.\|year=1963\|doi=10.1086/109141}} 6. ^¹{{cite journal\|bibcode=1977ApJS...35..161S\|title=A survey of southern dark clouds for Herbig-Haro objects and H-alpha emission stars\|journal=Astrophysical Journal Supplement Series\|volume=35\|pages=161\|author1=Schwartz\|first1=R. D.\|year=1977\|doi=10.1086/190473}} 7. ^¹{{cite journal\|bibcode=1993A&A...278...81R\|title=Visual binaries among pre-main sequence stars\|journal=Astronomy and Astrophysics\|volume=278\|pages=81\|author1=Reipurth\|first1=Bo\|last2=Zinnecker\|first2=Hans\|year=1993}} 8. ^¹{{cite journal\|bibcode=2008ApJ...683..844L\|arxiv=0803.0561\|title=A Multiplicity Census of Young Stars in Chamaeleon I\|journal=The Astrophysical Journal\|volume=683\|issue=2\|pages=844–861\|author1=Lafrenière\|first1=David\|last2=Jayawardhana\|first2=Ray\|last3=Brandeker\|first3=Alexis\|last4=Ahmic\|first4=Mirza\|last5=Van Kerkwijk\|first5=Marten H.\|year=2008\|doi=10.1086/590239}} 9. ^¹{{cite journal\|bibcode=2013A&A...554A..43D\|arxiv=1304.1150\|title=Protoplanetary disk evolution and stellar parameters of T Tauri binaries in Chamaeleon I\|journal=Astronomy & Astrophysics\|volume=554\|pages=A43\|author1=Daemgen\|first1=S.\|last2=Petr-Gotzens\|first2=M. G.\|last3=Correia\|first3=S.\|last4=Teixeira\|first4=P. S.\|last5=Brandner\|first5=W.\|last6=Kley\|first6=W.\|last7=Zinnecker\|first7=H.\|year=2013\|doi=10.1051/0004-6361/201321220}} ^[1]^[2]^[3]^[4]^[5]^[6]^[7]^[8]^[9] }}{{Stars of Chamaeleon}} 8 : Multiple star systems\|G-type main-sequence stars\|M-type main-sequence stars\|T Tauri stars\|Chamaeleon (constellation)\|Objects with variable star designations\|Hipparcos objects\|Durchmusterung objects
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