1999AJ....118.1777D

Query : 1999AJ....118.1777D

1999AJ....118.1777D - Astron. J., 118, 1777-1783 (1999/October-0)

An unusual brightening of eta Carinae.

DAVIDSON K., GULL T.R., HUMPHREYS R.M., ISHIBASHI K., WHITELOCK P., BERDNIKOV L., McGREGOR P.J., METCALFE T.S., POLOMSKI E. and HAMUY M.

Abstract (from CDS):

HST/Space Telescope Imaging Spectrograph data show that the apparent near-UV, visual-wavelength, and near-IR brightness of η Car increased by a factor of two during 1998. Meanwhile its Homunculus ejecta nebula brightened by about 30%, the largest fluctuation of this type in the past 40 years. These developments were quite unexpected and are not easy to explain. Some dust has probably been destroyed, while the star's luminosity may have increased even though it was already close to the Eddington limit. Such a rapid luminosity change would be a truly remarkable phenomenon, not predicted by existing models.

Abstract Copyright: ∼

Journal keyword(s): Stars: Circumstellar Matter - ISM: Jets and Outflows - Stars: Activity - Stars: Individual: Constellation Name: η Carinae - Stars: Peculiar - Stars: Winds, Outflows

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 BD+75 325 HS* 08 10 49.4903003712 +74 57 57.931973676 8.002 9.23 9.50 9.698 9.884 sdO5 267 0
2 HD 93250 ** 10 44 45.0275085072 -59 33 54.680974848 6.73 8.12 7.50 8.38   O4III(fc) 334 0
3 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 1071 2
4 NAME Homunculus Nebula ISM 10 45 03.5 -59 41 04           ~ 379 1
5 * eta Car s*b 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 6.123 4.41 LBV 2543 0
6 HD 93695 V* 10 47 44.3174678544 -59 52 30.921185136   6.35 6.47     B3V 53 0

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