HR Carinae

HR Car
Data pengamatan; Epos J2000.0 Ekuinoks J2000.0
Rasi bintang	Carina
Asensio rekta	10j 22m 53.84074d
Deklinasi	−59° 37′ 28.3774″
Magnitudo tampak (V)	8.42 (6.95 - 8.80)
Ciri-ciri
Kelas spektrum	LBV
Indeks warna U−B	−0.22
Indeks warna B−V	+0.92
Jenis variabel	LBV
Astrometri
Gerak diri (μ)	RA: -6.87 mdb/thn ; Dek.: +2.33 mdb/thn
Paralaks (π)	1,69±0,82 mdb
Jarak	5.4k pc
Magnitudo mutlak (MV)	-8.4
	Orbit
Periode (P)	4557.5 ± 21.0 days
Sumbu semimayor (a)	3.324 ± 0.026"; (18 AU)
Eksentrisitas (e)	0.4 ± 0.2
Inklinasi (i)	119.2 ± 0.7°
Detail
Massa	25- 40 M☉
Radius	220 (100 - 350) R☉
Luminositas	416,000-790,000 L☉
Suhu	7,900-21,900 K
Kecepatan rotasi (v sin i)	150 km/s
Penamaan lain
	HR Car, HD 90177, HIP 50843, SAO 238005, CD-59 3044, GC 14276, MWC 202, AAVSO 1019-59
Referensi basis data
SIMBAD	data

HR Carinae adalah bintang variabel biru bercahaya yang terletak di konstelasi Carina. Bintang ini dikelilingi oleh nebula awan besar yang terbentuk dari reaksi bahan nuklir yang dikeluarkan karena bintang ini memiliki banyak cangkang atmosfer yang mengembang. Bintang ini adalah salah satu bintang paling bercahaya di Bima Sakti. Ia memiliki sayap emisi yang sangat luas di garis Balmer, yang membuatnya memiliki garis luas yang diamati dalam spektrum bintang O dan Wolf–Rayet. Berjarak sekitar 5 kiloparsek dan magnitudo bolometrik-nya adalah -9,4 yang menempatkan HR Carinae HR di antara bintang-bintang paling bercahaya di galaksi.

Lihat pula

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Referensi

^ ^a ^b ^c ^d ^e Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752 . Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
^ ^a ^b ^c Drilling, J. S. (1991). "UBV photometry of OB+ stars in the southern Milky Way". The Astrophysical Journal Supplement Series. 76: 1033. Bibcode:1991ApJS...76.1033D. doi:10.1086/191588.
^ ^a ^b 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.
^ ^a ^b ^c Hutsemekers, D; van Drom, E. (1991). "HR Carinae - A luminous blue variable surrounded by an arc-shaped nebula". Astronomy and Astrophysics. 281: 141–149. Bibcode:1991A&A...248..141H.
^ ^a ^b ^c Boffin, Henri M. J.; Rivinius, Thomas; Merand, Antoine; Mehner, Andrea; Lebouquin, Jean-Baptiste; Pourbaix, Dimitri; De Wit, Willem-Jan; Martayan, Christophe; Guieu, Sylvain (2016). "The LBV HR Car has a partner: Discovery of a companion with the VLTI". Astronomy & Astrophysics. 593: A90. arXiv:1607.07724 . Bibcode:2016A&A...593A..90B. doi:10.1051/0004-6361/201629127. hdl:2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/239364.
^ ^a ^b Groh, J. H.; Damineli, A.; Hillier, D. J.; Barbá, R.; Fernández-Lajús, E.; Gamen, R. C.; Moisés, A. P.; Solivella, G.; Teodoro, M. (2009). "Bona Fide, Strong-Variable Galactic Luminous Blue Variable Stars Are Fast Rotators: Detection of a High Rotational Velocity in Hr Carinae". The Astrophysical Journal. 705 (1): L25–L30. arXiv:0909.4459 . Bibcode:2009ApJ...705L..25G. doi:10.1088/0004-637X/705/1/L25.
^ ^a ^b Machado, M. A. D.; de Araújo, F. X.; Pereira, C. B.; Fernandes, M. B. (2002). "HR Carinae: New spectroscopic data and physical parameters". Astronomy and Astrophysics. 387: 151–161. Bibcode:2002A&A...387..151M. doi:10.1051/0004-6361:20020295 . pp. 151-161.
^ ^a ^b Nazé, Y.; Rauw, G.; Hutsemékers, D. (2012). "The first X-ray survey of Galactic luminous blue variables". Astronomy & Astrophysics. 538: A47. arXiv:1111.6375 . Bibcode:2012A&A...538A..47N. doi:10.1051/0004-6361/201118040.

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[hipparcos-1] Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752 . Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.

[Drilling1991-2] Drilling, J. S. (1991). "UBV photometry of OB+ stars in the southern Milky Way". The Astrophysical Journal Supplement Series. 76: 1033. Bibcode:1991ApJS...76.1033D. doi:10.1086/191588.

[gcvs-3] 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.

[aanda-4] Hutsemekers, D; van Drom, E. (1991). "HR Carinae - A luminous blue variable surrounded by an arc-shaped nebula". Astronomy and Astrophysics. 281: 141–149. Bibcode:1991A&A...248..141H.

[boffin-5] Boffin, Henri M. J.; Rivinius, Thomas; Merand, Antoine; Mehner, Andrea; Lebouquin, Jean-Baptiste; Pourbaix, Dimitri; De Wit, Willem-Jan; Martayan, Christophe; Guieu, Sylvain (2016). "The LBV HR Car has a partner: Discovery of a companion with the VLTI". Astronomy & Astrophysics. 593: A90. arXiv:1607.07724 . Bibcode:2016A&A...593A..90B. doi:10.1051/0004-6361/201629127. hdl:2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/239364.

[groh-6] Groh, J. H.; Damineli, A.; Hillier, D. J.; Barbá, R.; Fernández-Lajús, E.; Gamen, R. C.; Moisés, A. P.; Solivella, G.; Teodoro, M. (2009). "Bona Fide, Strong-Variable Galactic Luminous Blue Variable Stars Are Fast Rotators: Detection of a High Rotational Velocity in Hr Carinae". The Astrophysical Journal. 705 (1): L25–L30. arXiv:0909.4459 . Bibcode:2009ApJ...705L..25G. doi:10.1088/0004-637X/705/1/L25.

[Machado-7] Machado, M. A. D.; de Araújo, F. X.; Pereira, C. B.; Fernandes, M. B. (2002). "HR Carinae: New spectroscopic data and physical parameters". Astronomy and Astrophysics. 387: 151–161. Bibcode:2002A&A...387..151M. doi:10.1051/0004-6361:20020295 . pp. 151-161.

[naze-8] Nazé, Y.; Rauw, G.; Hutsemékers, D. (2012). "The first X-ray survey of Galactic luminous blue variables". Astronomy & Astrophysics. 538: A47. arXiv:1111.6375 . Bibcode:2012A&A...538A..47N. doi:10.1051/0004-6361/201118040.

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