The subluminous spectroscopically peculiar type Ia supernova 1991bg in the elliptical galaxy NGC 4374

The subluminous spectroscopically peculiar type Ia supernova 1991bg in the elliptical galaxy NGC 4374

Photometric and spectroscopic observations of SN 1991bg, a very peculiar Type Ia supernova in the outskirts or the E1 galaxy NGC 4374 in the Virgo cluster, are reported. The spectra and light curves demonstrate that SN 1991bg is an intrinsically subluminous, photometrically and spectroscopically dis...

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Veröffentlicht in:The Astronomical journal 1992-10, Vol.104 (4), p.1543-1556
Hauptverfasser: FILIPPENKO, A. V, RICHMOND, M. W, SARGENT, W. L. W, SMALL, T. A, VAN BREUGEL, W. J. M, BRANCH, D, GASKELL, C. M, HERBST, W, FORD, C. H, TREFFERS, R. R, MATHESON, T, HO, L. C, DEY, A
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Astronomy
Earth, ocean, space
Exact sciences and technology
Late stages of stellar evolution (including black holes)
Stars
Supernovae
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container_end_page 1556
container_issue 4
container_start_page 1543
container_title The Astronomical journal
container_volume 104
creator FILIPPENKO, A. V
RICHMOND, M. W
SARGENT, W. L. W
SMALL, T. A
VAN BREUGEL, W. J. M
BRANCH, D
GASKELL, C. M
HERBST, W
FORD, C. H
TREFFERS, R. R
MATHESON, T
HO, L. C
DEY, A
description Photometric and spectroscopic observations of SN 1991bg, a very peculiar Type Ia supernova in the outskirts or the E1 galaxy NGC 4374 in the Virgo cluster, are reported. The spectra and light curves demonstrate that SN 1991bg is an intrinsically subluminous, photometrically and spectroscopically discrepant object. In some respects it is similar to the peculiar SNe Ia 1986G in Cen A and 1971I in NGC 5055. It is suggested that the observed properties of these mavericks are associated with a low mass in the ejecta. (C.D.)
doi_str_mv 10.1086/116339
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source EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection
subjects Astronomy
Earth, ocean, space
Exact sciences and technology
Late stages of stellar evolution (including black holes)
Stars
Supernovae
title The subluminous spectroscopically peculiar type Ia supernova 1991bg in the elliptical galaxy NGC 4374
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