V1936 Aquilae

V1936 Aquilae
	; A visual band light curve for V1936 Aquilae, plotted from ASAS-SN data
Observation data; Epoch J2000 Equinox J2000
Constellation	Aquila
Right ascension	19h 23m 47.64119s
Declination	14° 36′ 39.0612″
Apparent magnitude (V)	15.1
Characteristics
Evolutionary stage	Blue supergiant
Spectral type	O4I
Variable type	cLBV
Astrometry
Proper motion (μ)	RA: +6.500 mas/yr ; Dec.: −55.796 mas/yr
Parallax (π)	0.1462 ± 0.0.598 mas
Distance	6,000 pc
Details
Mass	25 M☉
Radius	48 - 145 R☉
Luminosity	562,000 L☉
Temperature	13,213 K
Age	2.3 (3-6) Myr
Other designations
	LS1, 2MASS J19234764+1436391
Database references
SIMBAD	data

V1936 Aquilae is a blue supergiant and candidate Luminous blue variable located in the nebula Westerhout 51, in the constellation Aquila, about 20,000 light years away. The star was originally identified as a massive star in 2000,^[3] and was thought to be an O-type supergiant. However, subsequent analyses have shown it to be not O but B-type,^[5] as well as being possibly an LBV.^[4]

Properties

V1936 Aquilae is a very luminous star. Recent measurements hint at a bolometric luminosity of around 560,000 L_☉, assuming a distance of 6 kiloparsecs, consistent with the distance of Westerhout 51, the very large H II region (nebula) it is located in. The star likely has a temperature of around 13,200 K.^[5] The Stefan-Boltzmann Law suggests a radius of around 143 times that of the Sun.

References

^ "ASAS-SN Variable Stars Database". ASAS-SN Variable Stars Database. ASAS-SN. Retrieved 6 January 2022.
^ ^a ^b ^c ^d ^e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
^ ^a ^b Okumura, Shin-ichiro; Mori, Atsushi; Nishihara, Eiji; Watanabe, Etsuji; Yamashita, Takuya (2000-11-01). "The Initial Mass Function of a Massive Star-forming Region W51". The Astrophysical Journal. 543 (2): 799–821. Bibcode:2000ApJ...543..799O. doi:10.1086/317116. ISSN 0004-637X. S2CID 120384418.
^ ^a ^b Smith, Nathan; Aghakhanloo, Mojgan; Murphy, Jeremiah W.; Drout, Maria R.; Stassun, Keivan G.; Groh, Jose H. (2019-09-01). "On the Gaia DR2 distances for Galactic luminous blue variables". Monthly Notices of the Royal Astronomical Society. 488 (2): 1760–1778. arXiv:1805.03298. Bibcode:2019MNRAS.488.1760S. doi:10.1093/mnras/stz1712. ISSN 0035-8711.
^ ^a ^b ^c ^d ^e ^f Bik, A.; Henning, Th.; Wu, S. -W.; Zhang, M.; Brandner, W.; Pasquali, A.; Stolte, A. (2019-04-01). "Near-infrared spectroscopy of the massive stellar population of W51: evidence for multi-seeded star formation". Astronomy and Astrophysics. 624: A63. arXiv:1902.05460. Bibcode:2019A&A...624A..63B. doi:10.1051/0004-6361/201935061. ISSN 0004-6361. S2CID 118711844.
^ Clark, J. S.; Davies, B.; Najarro, F.; MacKenty, J.; Crowther, P. A.; Messineo, M.; Thompson, M. A. (2009). "The P Cygni supergiant [OMN2000] LS1 - implications for the star formation history of W51". Astronomy and Astrophysics. 504 (2): 429. arXiv:0909.3934. Bibcode:2009A&A...504..429C. doi:10.1051/0004-6361/200911980. S2CID 2609634.
^ Lim, Wanggi; De Buizer, James M. (2019). "Surveying the Giant H II Regions of the Milky Way with SOFIA. I. W51A". The Astrophysical Journal. 873 (1): 51. arXiv:1901.07561. Bibcode:2019ApJ...873...51L. doi:10.3847/1538-4357/ab0288.

Zdroj:https://en.wikipedia.org?pojem=V1936_Aquilae
Text je dostupný za podmienok Creative Commons Attribution/Share-Alike License 3.0 Unported; prípadne za ďalších podmienok. Podrobnejšie informácie nájdete na stránke Podmienky použitia.

[ASAS-SN-1] "ASAS-SN Variable Stars Database". ASAS-SN Variable Stars Database. ASAS-SN. Retrieved 6 January 2022.

[gaia-2] Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.

[okumura-3] Okumura, Shin-ichiro; Mori, Atsushi; Nishihara, Eiji; Watanabe, Etsuji; Yamashita, Takuya (2000-11-01). "The Initial Mass Function of a Massive Star-forming Region W51". The Astrophysical Journal. 543 (2): 799–821. Bibcode:2000ApJ...543..799O. doi:10.1086/317116. ISSN 0004-637X. S2CID 120384418.

[smith-4] Smith, Nathan; Aghakhanloo, Mojgan; Murphy, Jeremiah W.; Drout, Maria R.; Stassun, Keivan G.; Groh, Jose H. (2019-09-01). "On the Gaia DR2 distances for Galactic luminous blue variables". Monthly Notices of the Royal Astronomical Society. 488 (2): 1760–1778. arXiv:1805.03298. Bibcode:2019MNRAS.488.1760S. doi:10.1093/mnras/stz1712. ISSN 0035-8711.

[bik-5] ^ ^a ^b ^c ^d ^e ^f Bik, A.; Henning, Th.; Wu, S. -W.; Zhang, M.; Brandner, W.; Pasquali, A.; Stolte, A. (2019-04-01). "Near-infrared spectroscopy of the massive stellar population of W51: evidence for multi-seeded star formation". Astronomy and Astrophysics. 624: A63. arXiv:1902.05460. Bibcode:2019A&A...624A..63B. doi:10.1051/0004-6361/201935061. ISSN 0004-6361. S2CID 118711844.

[clark2009-6] Clark, J. S.; Davies, B.; Najarro, F.; MacKenty, J.; Crowther, P. A.; Messineo, M.; Thompson, M. A. (2009). "The P Cygni supergiant [OMN2000] LS1 - implications for the star formation history of W51". Astronomy and Astrophysics. 504 (2): 429. arXiv:0909.3934. Bibcode:2009A&A...504..429C. doi:10.1051/0004-6361/200911980. S2CID 2609634.

[lim2019-7] Lim, Wanggi; De Buizer, James M. (2019). "Surveying the Giant H II Regions of the Milky Way with SOFIA. I. W51A". The Astrophysical Journal. 873 (1): 51. arXiv:1901.07561. Bibcode:2019ApJ...873...51L. doi:10.3847/1538-4357/ab0288.

[1]

[2]

[3]

[4]

[5]

[6]

[7]

Observation data Epoch J2000 Equinox J2000
A visual band light curve for V1936 Aquilae, plotted from ASAS-SN data^[1]
Constellation	Aquila
Right ascension	19^h 23^m 47.64119^s^[2]
Declination	14° 36′ 39.0612″^[2]
Apparent magnitude (V)	15.1
Characteristics
Evolutionary stage	Blue supergiant
Spectral type	O4I^[3]
Variable type	cLBV^[4]
Astrometry

Proper motion (μ)	RA: +6.500^[2] mas/yr Dec.: −55.796^[2] mas/yr
Parallax (π)	0.1462 ± 0.0.598 mas^[2]
Distance	6,000^[5] pc

Details

Mass	25^[5] `M`_☉
Radius	48 - 145^[6] `R`_☉
Luminosity	562,000^[5] `L`_☉
Temperature	13,213^[5] K
Age	2.3 (3-6)^[7] Myr

Other designations
LS1, 2MASS J19234764+1436391
Database references
SIMBAD	data