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A new luminous blue variable - R143 in 30 DoradusWe have discovered that R143 in the Large Magellanic Cloud is a luminous blue variable (LBV), the first and perhaps the lone LBV in the central cluster of 30 Doradus, and only the sixth known LMC LBV. Photometric and spectroscopic observations over the past 40 yr indicate that during that time R143 moved redward (changing from an F5 to F8 supergiant), then blueward (possibly becoming as early as O9.5), and is now moving back to the red (currently appearing as a late B supergiant). Similarly, the V magnitude of the star has changed by at least 1.4 mag. Images of R143 show very unusual filaments of nebulosity extending from the star to a shell at a distance of 3.5 pc, perhaps due to a similar ejection mechanism that created the spiral jets and shell associated with AG Car, another LBV.
Document ID
19930053804
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Parker, Joel WM.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Clayton, Geoffrey C.
(Colorado Univ. Boulder, United States)
Winge, Claudia
(Rio Grande do Sul, Univ. Federal, Porto Alegre, Brazil)
Conti, Peter S.
(Joint Inst. for Lab. Astrophysics Boulder, CO, United States)
Date Acquired
August 16, 2013
Publication Date
June 1, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 409
Issue: 2
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
93A37801
Funding Number(s)
CONTRACT_GRANT: NAGW-2338
CONTRACT_GRANT: NGT-50483
Distribution Limits
Public
Copyright
Other

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