AG Carinae

from Wikipedia, the free encyclopedia
Stern
AG Carinae
Photo from the Hubble Space Telescope
Photo from the Hubble Space Telescope
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Keel of the ship
Right ascension 10 h 56 m 11.6 s
declination −60 ° 27 ′ 13 ″
Apparent brightness 5.7 to 9.0 mag
Typing
Variable star type LBV 
Astrometry
parallax (0.40 ± 0.22)  mas
distance 20,000  ly
Proper movement 
Rec. Share: (−4.861 ± 0.079)  mas / a
Dec. portion: (1.923 ± 0.092)  mas / a
Physical Properties
Dimensions 60 to 70  M ☉
Luminosity

1.5 × 10 6  L ☉

Effective temperature 17000-22800  K
Rotation time (13 ± 2) d
(assuming R = 62 R ☉
and v rot  = 220 km / s)
Other names
and catalog entries
Cordoba Survey CD −59 ° 3430
Henry Draper Catalog HD 94910 [1]
Hipparcos catalog HIP 53461 [2]
SAO catalog SAO 251185 [3]
Tycho catalog TYC 8958-3996-1 [4]Template: Infobox star / maintenance / specification of the TYC catalog
2MASS catalog 2MASS J10561158-6027128 [5]

AG Carinae ( AG Car ) is a star 20,000 light years away in the constellation Carina . The star is classified as a luminous blue variable and is one of the most luminous stars in the Milky Way . Due to the great distance and the dust in between, however, it cannot be observed with the naked eye: its apparent brightness fluctuates between 5.7 m and 9.0 m .

The star is surrounded by a massive nebula, which consists of the matter of the strong stellar wind . The star is apparently in a transition region from a Wolf-Rayet star and a blue Supergiants the spectral O varied and the spectral between WN11 with lower visual brightness, and an early A- hypergiants at the maximum.

Apparent brightness of AG Car between January 1, 1940 and November 23, 2010

swell

  1. ^ F. van Leeuwen: Validation of the new Hipparcos reduction . In: Astronomy and Astrophysics . 474, No. 2, November 2007, pp. 653-664. arxiv : 0708.1752 . bibcode : 2007A & A ... 474..653V . doi : 10.1051 / 0004-6361: 20078357 .
  2. ↑ a b Gaia Collaboration: VizieR Online Data Catalog: Gaia DR1 (Gaia Collaboration, 2016) . In: VizieR On-line Data Catalog: I / 337. Originally published in: Astron. Astrophys . 1337, 2016. bibcode : 2016yCat.1337 .... 0G . Vizier catalog entry
  3. ↑ a b c d J. H. Groh, DJ Hillier, A. Damineli: On the Nature of the Prototype Luminous Blue Variable AG Carinae. II. Witnessing a Massive Star Evolving Close to the Eddington and Bistability Limits . In: The Astrophysical Journal . 736, No. 1, July 2011. arxiv : 1105.0814 . bibcode : 2011ApJ ... 736 ... 46G . doi : 10.1088 / 0004-637X / 736/1/46 .

Web links