TY - JOUR
T1 - HST/GHRS observations of the compact slow ejecta of eta carinae
AU - Davidson, Kris
AU - Ebbets, Dennis
AU - Johansson, Sveneric
AU - Morse, Jon A.
AU - Hamann, Frederick W.
AU - Balick, Bruce
AU - Humphreys, Roberta M.
AU - Weigelt, Gerd
AU - Frank, Adam
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1997/1
Y1 - 1997/1
N2 - We report spectroscopic observations of 77 Car and adjacent gas with an unprecedented combination of spatial and spectral resolution. 0.1″×0.1 Å. Radial velocities show that the bright objects C and D, 0.2″ from the star, are slow equatorial ejecta. The narrow emission lines which fluctuate in the spectrum of the core region are found to originate in C, D, and related gas. Our data and earlier speckle observations suggest that either C and D were formed long after the Great Eruption of η Car had ceased, or else they have been continuously accelerated outward since they were ejected. These strange objects are essential components of the equatorial-debris puzzle, which is crucial regarding the nature of this star and its instability. Moreover, the observed bright narrow emission lines in CD are excited by peculiar mechanisms that deserve more attention.
AB - We report spectroscopic observations of 77 Car and adjacent gas with an unprecedented combination of spatial and spectral resolution. 0.1″×0.1 Å. Radial velocities show that the bright objects C and D, 0.2″ from the star, are slow equatorial ejecta. The narrow emission lines which fluctuate in the spectrum of the core region are found to originate in C, D, and related gas. Our data and earlier speckle observations suggest that either C and D were formed long after the Great Eruption of η Car had ceased, or else they have been continuously accelerated outward since they were ejected. These strange objects are essential components of the equatorial-debris puzzle, which is crucial regarding the nature of this star and its instability. Moreover, the observed bright narrow emission lines in CD are excited by peculiar mechanisms that deserve more attention.
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U2 - 10.1086/118256
DO - 10.1086/118256
M3 - Article
AN - SCOPUS:0000983842
SN - 0004-6256
VL - 113
SP - 335
EP - 345
JO - Astronomical Journal
JF - Astronomical Journal
IS - 1
ER -