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Wikipedia

R85

January 01, 1970

For other uses, see R85 (disambiguation).

R85 (or RMC 85, after the Radcliffe Observatory Magellanic Clouds catalog[5]) is a candidate luminous blue variable[9] located in the LH-41 OB association[10] in the Large Magellanic Cloud.

R85

The nebula N119; R85 is the brightest of the small triangle of stars in the lower right "arm".
Credit: ESO
Observation data
Epoch J2000      Equinox J2000
Constellation Dorado
Right ascension 05h 17m 56.076s[1]
Declination −69° 16′ 03.77″[1]
Apparent magnitude (V) 10.84[2] (10.65 - 10.80[3])
Characteristics
Evolutionary stage LBV[4]
Spectral type B5 Iae[3]
Apparent magnitude (U) 10.28[2]
Apparent magnitude (B) 10.93[2]
Apparent magnitude (V) 10.84[2]
Apparent magnitude (R) 10.53[2]
Apparent magnitude (I) 10.44[2]
Apparent magnitude (J) 10.103[1]
Apparent magnitude (H) 9.980[1]
Apparent magnitude (K) 9.822[1]
U−B color index −0.65[2]
B−V color index +0.09[2]
Variable type LBV[4]
Astrometry
Radial velocity (Rv)292[5] km/s
Proper motion (μ) RA: −1.0[6] mas/yr
Dec.: −2.3[6] mas/yr
Distance160,000 ly
(50,000[7] pc)
Absolute magnitude (MV)−8.2 – −8.5[3]
Details
1960 (minimum)
Radius135[8] R☉
Luminosity350,000[3] L☉
Temperature13,500[3] K
1983 - 1990 (maximum)
Luminosity315,000[3] L☉
Temperature10,000[3] K
Other designations
HD 269321, CPD−69°352, 2MASS J05175607-6916037, GSC 09162-00359, Sk−69°92
Database references
SIMBADdata
A visual band light curve for R85, plotted from ASAS-SN data[11]

R85 has been shown to vary erratically in brightness with an amplitude of about 0.3 magnitudes. It shows variations on several timescales, sometimes with a distinct 400 day period. It has also shown temperature changes associated with brightness changes over several years, a characteristic of luminous blue variables.[12]

Based on R85's current properties and evolutionary models, it probably started out with an initial mass of 28 M☉.[10] It is theorized to be making a bubble known as DEM L132a with its stellar wind in the nebula LHA-120 N119, along with S Doradus.[13] It has an infrared excess consistent with a stellar wind contribution.[4]

References edit

  1. ^ a b c d e Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues. 2246: II/246. Bibcode:2003yCat.2246....0C.
  2. ^ a b c d e f g h Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
  3. ^ a b c d e f g Van Genderen, A. M. (2001). "S Doradus variables in the Galaxy and the Magellanic Clouds". Astronomy and Astrophysics. 366 (2): 508–531. Bibcode:2001A&A...366..508V. CiteSeerX 10.1.1.459.5400. doi:10.1051/0004-6361:20000022. S2CID 55796300.
  4. ^ a b c Bonanos, A. Z.; Massa, D. L.; Sewilo, M.; Lennon, D. J.; Panagia, N.; Smith, L. J.; Meixner, M.; Babler, B. L.; Bracker, S.; Meade, M. R.; Gordon, K. D.; Hora, J. L.; Indebetouw, R.; Whitney, B. A. (2009). "Spitzersage Infrared Photometry of Massive Stars in the Large Magellanic Cloud". The Astronomical Journal. 138 (4): 1003–1021. arXiv:0905.1328. Bibcode:2009AJ....138.1003B. doi:10.1088/0004-6256/138/4/1003. S2CID 14056495.
  5. ^ a b Feast, M. W.; Thackeray, A. D.; Wesselink, A. J. (1960). "The brightest stars in the Magellanic Clouds". Monthly Notices of the Royal Astronomical Society. 121 (4): 337. Bibcode:1960MNRAS.121..337F. doi:10.1093/mnras/121.4.337.
  6. ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H.
  7. ^ Aldoretta, E. J.; Caballero-Nieves, S. M.; Gies, D. R.; Nelan, E. P.; Wallace, D. J.; Hartkopf, W. I.; Henry, T. J.; Jao, W.-C.; Maíz Apellániz, J.; Mason, B. D.; Moffat, A. F. J.; Norris, R. P.; Richardson, N. D.; Williams, S. J. (2015). "The Multiplicity of Massive Stars: A High Angular Resolution Survey with the Guidance Sensor". The Astronomical Journal. 149 (1): 26. arXiv:1410.0021. Bibcode:2015AJ....149...26A. doi:10.1088/0004-6256/149/1/26. S2CID 58911264.
  8. ^ Stahl, O.; Wolf, B.; Leitherer, C.; Zickgraf, F.-J.; Krautter, J.; De Groot, M. (1984). "Variable blue supergiants in the Large Magellanic Cloud - R 84, R 85, and R 99". Astronomy and Astrophysics. 140: 459. Bibcode:1984A&A...140..459S.
  9. ^ Richardson, Noel D.; Mehner, Andrea (2018). "The 2018 Census of Luminous Blue Variables in the Local Group". Research Notes of the American Astronomical Society. 2 (3): 121. arXiv:1807.04262. Bibcode:2018RNAAS...2..121R. doi:10.3847/2515-5172/aad1f3. S2CID 119509358.
  10. ^ a b Smith, Nathan; Tombleson, Ryan (2015). "Luminous blue variables are antisocial: Their isolation implies that they are kicked mass gainers in binary evolution". Monthly Notices of the Royal Astronomical Society. 447 (1): 598–617. arXiv:1406.7431. Bibcode:2015MNRAS.447..598S. doi:10.1093/mnras/stu2430. S2CID 119284620.
  11. ^ "ASAS-SN Variable Stars Database". ASAS-SN Variable Stars Database. ASAS-SN. Retrieved 6 January 2022.
  12. ^ Van Genderen, A. M.; Sterken, C.; De Groot, M. (1998). "Light variations of massive stars (alpha Cyg variables). XVI. The LMC supergiants R 85 (LBV) and R 110 (LBV) and the SMC supergiants R 42 and R 45". Astronomy and Astrophysics. 337: 393. Bibcode:1998A&A...337..393V.
  13. ^ Ambrocio-Cruz, P.; Rosado, M.; Laval, A.; Le Coarer, E.; Russeil, D.; Amram, P. (2008). "Kinematic field of the S-shaped nebula N119 in the LMC". Revista Mexicana de Astronomía y Astrofísica. 44: 355. Bibcode:2008RMxAA..44..355A.

January 01, 1970
other, uses, disambiguation, after, radcliffe, observatory, magellanic, clouds, catalog, candidate, luminous, blue, variable, located, association, large, magellanic, cloud, nebula, n119, brightest, small, triangle, stars, lower, right, credit, observation, da. For other uses see R85 disambiguation R85 or RMC 85 after the Radcliffe Observatory Magellanic Clouds catalog 5 is a candidate luminous blue variable 9 located in the LH 41 OB association 10 in the Large Magellanic Cloud R85The nebula N119 R85 is the brightest of the small triangle of stars in the lower right arm Credit ESO Observation dataEpoch J2000 Equinox J2000 Constellation Dorado Right ascension 05h 17m 56 076s 1 Declination 69 16 03 77 1 Apparent magnitude V 10 84 2 10 65 10 80 3 Characteristics Evolutionary stage LBV 4 Spectral type B5 Iae 3 Apparent magnitude U 10 28 2 Apparent magnitude B 10 93 2 Apparent magnitude V 10 84 2 Apparent magnitude R 10 53 2 Apparent magnitude I 10 44 2 Apparent magnitude J 10 103 1 Apparent magnitude H 9 980 1 Apparent magnitude K 9 822 1 U B color index 0 65 2 B V color index 0 09 2 Variable type LBV 4 AstrometryRadial velocity Rv 292 5 km sProper motion m RA 1 0 6 mas yr Dec 2 3 6 mas yrDistance160 000 ly 50 000 7 pc Absolute magnitude MV 8 2 8 5 3 Details1960 minimum Radius135 8 R Luminosity350 000 3 L Temperature13 500 3 K1983 1990 maximum Luminosity315 000 3 L Temperature10 000 3 K Other designationsHD 269321 CPD 69 352 2MASS J05175607 6916037 GSC 09162 00359 Sk 69 92 Database referencesSIMBADdata A visual band light curve for R85 plotted from ASAS SN data 11 R85 has been shown to vary erratically in brightness with an amplitude of about 0 3 magnitudes It shows variations on several timescales sometimes with a distinct 400 day period It has also shown temperature changes associated with brightness changes over several years a characteristic of luminous blue variables 12 Based on R85 s current properties and evolutionary models it probably started out with an initial mass of 28 M 10 It is theorized to be making a bubble known as DEM L132a with its stellar wind in the nebula LHA 120 N119 along with S Doradus 13 It has an infrared excess consistent with a stellar wind contribution 4 References edit a b c d e Cutri Roc M Skrutskie Michael F Van Dyk Schuyler D Beichman Charles A Carpenter John M Chester Thomas Cambresy Laurent Evans Tracey E Fowler John W Gizis John E Howard Elizabeth V Huchra John P Jarrett Thomas H Kopan Eugene L Kirkpatrick J Davy Light Robert M Marsh Kenneth A McCallon Howard L Schneider Stephen E Stiening Rae Sykes Matthew J Weinberg Martin D Wheaton William A Wheelock Sherry L Zacarias N 2003 VizieR Online Data Catalog 2MASS All Sky Catalog of Point Sources Cutri 2003 CDS ADC Collection of Electronic Catalogues 2246 II 246 Bibcode 2003yCat 2246 0C a b c d e f g h Ducati J R 2002 VizieR Online Data Catalog Catalogue of Stellar Photometry in Johnson s 11 color system CDS ADC Collection of Electronic Catalogues 2237 Bibcode 2002yCat 2237 0D a b c d e f g Van Genderen A M 2001 S Doradus variables in the Galaxy and the Magellanic Clouds Astronomy and Astrophysics 366 2 508 531 Bibcode 2001A amp A 366 508V CiteSeerX 10 1 1 459 5400 doi 10 1051 0004 6361 20000022 S2CID 55796300 a b c Bonanos A Z Massa D L Sewilo M Lennon D J Panagia N Smith L J Meixner M Babler B L Bracker S Meade M R Gordon K D Hora J L Indebetouw R Whitney B A 2009 Spitzersage Infrared Photometry of Massive Stars in the Large Magellanic Cloud The Astronomical Journal 138 4 1003 1021 arXiv 0905 1328 Bibcode 2009AJ 138 1003B doi 10 1088 0004 6256 138 4 1003 S2CID 14056495 a b Feast M W Thackeray A D Wesselink A J 1960 The brightest stars in the Magellanic Clouds Monthly Notices of the Royal Astronomical Society 121 4 337 Bibcode 1960MNRAS 121 337F doi 10 1093 mnras 121 4 337 a b Hog E Fabricius C Makarov V V Urban S Corbin T Wycoff G Bastian U Schwekendiek P Wicenec A 2000 The Tycho 2 catalogue of the 2 5 million brightest stars Astronomy and Astrophysics 355 L27 Bibcode 2000A amp A 355L 27H Aldoretta E J Caballero Nieves S M Gies D R Nelan E P Wallace D J Hartkopf W I Henry T J Jao W C Maiz Apellaniz J Mason B D Moffat A F J Norris R P Richardson N D Williams S J 2015 The Multiplicity of Massive Stars A High Angular Resolution Survey with the Guidance Sensor The Astronomical Journal 149 1 26 arXiv 1410 0021 Bibcode 2015AJ 149 26A doi 10 1088 0004 6256 149 1 26 S2CID 58911264 Stahl O Wolf B Leitherer C Zickgraf F J Krautter J De Groot M 1984 Variable blue supergiants in the Large Magellanic Cloud R 84 R 85 and R 99 Astronomy and Astrophysics 140 459 Bibcode 1984A amp A 140 459S Richardson Noel D Mehner Andrea 2018 The 2018 Census of Luminous Blue Variables in the Local Group Research Notes of the American Astronomical Society 2 3 121 arXiv 1807 04262 Bibcode 2018RNAAS 2 121R doi 10 3847 2515 5172 aad1f3 S2CID 119509358 a b Smith Nathan Tombleson Ryan 2015 Luminous blue variables are antisocial Their isolation implies that they are kicked mass gainers in binary evolution Monthly Notices of the Royal Astronomical Society 447 1 598 617 arXiv 1406 7431 Bibcode 2015MNRAS 447 598S doi 10 1093 mnras stu2430 S2CID 119284620 ASAS SN Variable Stars Database ASAS SN Variable Stars Database ASAS SN Retrieved 6 January 2022 Van Genderen A M Sterken C De Groot M 1998 Light variations of massive stars alpha Cyg variables XVI The LMC supergiants R 85 LBV and R 110 LBV and the SMC supergiants R 42 and R 45 Astronomy and Astrophysics 337 393 Bibcode 1998A amp A 337 393V Ambrocio Cruz P Rosado M Laval A Le Coarer E Russeil D Amram P 2008 Kinematic field of the S shaped nebula N119 in the LMC Revista Mexicana de Astronomia y Astrofisica 44 355 Bibcode 2008RMxAA 44 355A Retrieved from https en wikipedia org w index php title R85 amp oldid 1186879136, wikipedia, wiki, book, books, library,

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