astro.wikisort.org - StarII Lupi (IRAS 15194-5115) is a Mira variable and carbon star located in the constellation Lupus. It is the brightest carbon star in the Southern Hemisphere at 12 μm.
II Lupi
 A near-infrared (J band) light curve for II Lupi, adapted from Lykou et al. (2018) [1] |
Observation data Epoch J2000.0 Equinox J2000.0 |
Constellation |
Lupus |
Right ascension |
15h 23m 05.075s[2] |
Declination |
−51° 25′ 58.73″[2] |
Characteristics |
Spectral type |
C[3] |
Apparent magnitude (I) |
10.18[4] |
Apparent magnitude (J) |
5.92[5] |
Apparent magnitude (K) |
1.79[5] |
Variable type |
Mira[6] |
Astrometry |
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Proper motion (μ) | RA: −13.837[7] mas/yr Dec.: 5.415[7] mas/yr |
Parallax (π) | 0.5217 ± 0.2778 mas[7] |
Distance | 500[8] pc |
Absolute magnitude (MV) | −5.15[9] |
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Details |
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Radius | 547[3] R☉ |
Luminosity | 8,800[8] L☉ |
Temperature | 2,400[8] K |
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Other designations |
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II Lup, IRAS 15194-5115, 2MASS J15230507-5125587, WOS 48, Gaia DR2 5889797405925371392 |
Database references |
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SIMBAD | data |
In 1987, the infrared source IRAS 15194-5115 was identified as an extreme carbon star. It was seen to be strongly variable at optical and infrared wavelengths. It is very faint visually, 15th or 16th magnitude in a red filter and below 21st magnitude in a blue filter, but at mid-infrared wavelengths (N band) it is the third-brightest carbon star in the sky.[10] A star at the location had earlier been catalogued as WOS 48, a possible S-type star, on the basis of strong LaO bands in its spectrum.[11]
On the basis of infrared photometry,[12] IRAS 15194-5115 was given the variable star designation II Lupi in 1995, although the variability type was still unknown.[13] More detailed infrared photometry confirmed that II Lupi was a Mira variable and showed regular variations with a period of 575 days over 18 years. The mean magnitude also dimmed and brightened during that time and has been characterised as a 6,900-day secondary period although less than a full cycle was observed. The secondary period could be interpreted as an isolated or irregular obscuration event in a dust shell surrounding the star.[14]
II Lupi has a strong stellar wind averaging 10−5 solar masses per year.[15]
References
- Lykou, Foteini; Zijlstra, A. A.; Kluska, J.; Lagadec, E.; Tuthill, P. G.; Avison, A.; Norris, B. R. M.; Parker, Q. A. (October 2018). "The curious case of II Lup: a complex morphology revealed with SAM/NACO and ALMA". Monthly Notices of the Royal Astronomical Society. 480 (1): 1006–1021. doi:10.1093/mnras/sty1903. Retrieved 21 January 2022.
- 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. S2CID 115529446.
- De Beck, E.; Decin, L.; De Koter, A.; Justtanont, K.; Verhoelst, T.; Kemper, F.; Menten, K. M. (2010). "Probing the mass-loss history of AGB and red supergiant stars from CO rotational line profiles. II. CO line survey of evolved stars: Derivation of mass-loss rate formulae". Astronomy and Astrophysics. 523: A18. arXiv:1008.1083. Bibcode:2010A&A...523A..18D. doi:10.1051/0004-6361/200913771. S2CID 16131273.
- DENIS Consortium (2003). "VizieR Online Data Catalog: The DENIS database (DENIS Consortium, 2003)". VizieR On-line Data Catalog. Bibcode:2003yCat....102002T.
- Whitelock, Patricia A; Feast, Michael W; Marang, Freddy; Groenewegen, M. A. T (2006). "Near-infrared photometry of carbon stars". Monthly Notices of the Royal Astronomical Society. 369 (2): 751–782. arXiv:astro-ph/0603504. Bibcode:2006MNRAS.369..751W. doi:10.1111/j.1365-2966.2006.10322.x. S2CID 14453496.
- Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- Schöier, F. L; Ramstedt, S; Olofsson, H; Lindqvist, M; Bieging, J. H; Marvel, K. B (2013). "The abundance of HCN in circumstellar envelopes of AGB stars of different chemical type". Astronomy & Astrophysics. 550: A78. arXiv:1301.2129. Bibcode:2013A&A...550A..78S. doi:10.1051/0004-6361/201220400. S2CID 96447896.
- Guandalini, R; Cristallo, S (2013). "Luminosities of carbon-rich asymptotic giant branch stars in the Milky Way". Astronomy & Astrophysics. 555: A120. arXiv:1305.4203. Bibcode:2013A&A...555A.120G. doi:10.1051/0004-6361/201321225. S2CID 54918450.
- Meadows, P. J; Good, A. R; Wolstencroft, R. D (1987). "The identification of IRAS 15194-5115 with a bright extreme carbon star". Monthly Notices of the Royal Astronomical Society. 225: 43p–49p. Bibcode:1987MNRAS.225P..43M. doi:10.1093/mnras/225.1.43P.
- Westerlund, B. E; Olander, N (1978). "S stars in the southern Milky Way". Astronomy and Astrophysics Supplement Series. 32: 401. Bibcode:1978A&AS...32..401W.
- Le Bertre, T (1992). "Carbon-star lightcurves in the 1-20 micron range". Astronomy and Astrophysics Supplement Series. 94: 377. Bibcode:1992A&AS...94..377L.
- Kazarovets, E. V; Samus, N. N (1995). "The 72nd Name-List of Variable Stars". Information Bulletin on Variable Stars. 4140: 1. Bibcode:1995IBVS.4140....1K.
- Feast, Michael W; Whitelock, Patricia A; Marang, Freddy (2003). "The case for asymmetric dust around a C-rich asymptotic giant branch star". Monthly Notices of the Royal Astronomical Society. 346 (3): 878. arXiv:astro-ph/0308417. Bibcode:2003MNRAS.346..878F. doi:10.1111/j.1365-2966.2003.07136.x. S2CID 18362625.
- Smith, C. L.; Zijlstra, A. A.; Fuller, G. A. (2015), "A molecular line survey of a sample of AGB stars and planetary nebulae", Monthly Notices of the Royal Astronomical Society, 454 (1): 177–200, arXiv:1508.05014, Bibcode:2015MNRAS.454..177S, doi:10.1093/mnras/stv1934, S2CID 119294505
Constellation of Lupus |
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|
Stars | Bayer | |
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Flamsteed | |
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Variable | |
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HR |
- 5362
- 5364
- 5377
- 5380
- 5401
- 5412
- 5413
- 5426
- 5427
- 5444
- 5450 (a)
- 5457
- 5458
- 5494
- 5495 (b)
- 5498
- 5509
- 5556 (c)
- 5559
- 5566
- 5580
- 5595
- 5607
- 5615
- 5617
- 5625
- 5636
- 5637
- 5642
- 5650
- 5651 (e)
- 5653
- 5663
- 5667
- 5668
- 5682
- 5688
- 5689
- 5696
- 5724 (k)
- 5736
- 5738
- 5742
- 5751
- 5753
- 5767
- 5773
- 5784
- 5790
- 5807
- 5821
- 5822
- 5825 (g)
- 5837 (h)
- 5846
- 5860
- 5862
- 5864
- 5893
- 5916
- 5918
- 5923
- 5929
- 5935
- 5943
- 5952
- 5956
- 5967
- 5970
- 5974
- 5975
- 5991
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HD |
- 125809
- 126093
- 126525
- 126759
- 128154
- 129624
- 133399
- 133469
- 133518
- 135430
- 135468
- 136607
- 137785
- 137919
- 138395
- 142527
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Other | |
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 Category |
На других языках
- [en] II Lupi
[ru] II Волка
II Волка (лат. II Lupi) — одиночная переменная звезда[5] в созвездии Волка на расстоянии (вычисленном из значения параллакса) приблизительно 6252 световых лет (около 1917 парсеков) от Солнца. Видимая звёздная величина звезды — от +5,97m до +4,37m[6].
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