AS 314

AS 314
Observation data
Epoch J2000      Equinox J2000
Constellation Scutum
Right ascension 18h 39m 26.106s
Declination −13° 50′ 47.19″
Apparent magnitude (V) 10.01
Characteristics
Spectral type A3Ia
Details
Luminosity160,000 L☉
Temperature9,100 K
Other designations
V452 Sct, BD -13°5061
Database references
SIMBADdata

AS 314, also known as V452 Scuti, is a white hypergiant star and luminous blue variable candidate located in the constellation of Scutum.[1] It has an apparent magnitude of 10.01 and can be seen with small telescopes.

Characteristics

AS 314 was poorly studied until the year 2000, when Miroshnichenko et al. determined a distance for this star of around 10 kiloparsecs (32,600 light years), a luminosity 160,000 times that of Sun (L☉), a radius 200 times the solar radius (R☉), and an initial mass of 20 solar masses (M☉). It's losing 2 × 10−5 M☉ each year (in other words, 1 M☉ every 50,000 years) through a very strong stellar wind.[1]

It has an infrared excess, suggesting that it's shrouded in a circumstellar envelope of dust, which perhaps produced outbursts in the past as a luminous blue variable, because its location in the Hertzsprung-Russell diagram places it near the zone occupied by those stars;[1][2] however, it has not been classified as a bona fide luminous blue variable, but as a candidate.[3]

References

  1. ↑ 1.0 1.1 1.2 Miroshnichenko, A. S.; Chentsov, E. L.; Klochkova, V. G. (June 2000). "AS 314: A dusty A-type hypergiant". Astronomy and Astrophysics 144: 379–389. Bibcode:2000A&AS..144..379M. doi:10.1051/aas:2000216.
  2. ↑ Clark, J. S.; Larionov, V. M.; Arkharov, A. (May 2005). "On the population of galactic Luminous Blue Variables". Astronomy and Astrophysics 435 (1): 239–246. Bibcode:2005A&A...435..239C. doi:10.1051/0004-6361:20042563.
  3. ↑ Nazé, Y.; Rauw, G.; Hutsemékers, D. (February 2012). "The first X-ray survey of Galactic luminous blue variables". Astronomy and Astrophysics 538. arXiv:1111.6375. Bibcode:2012A&A...538A..47N. doi:10.1051/0004-6361/201118040. A47.