Volume 461, Number 3, January III 2007
|Page(s)||943 - 947|
|Published online||13 November 2006|
The emission line galaxy TV Reticuli
Evidence for an ultraluminous supernova
European Southern Observatory, Casilla 19001, Santiago 19, Chile e-mail: firstname.lastname@example.org
2 Departamento de Astronomía y Astrofísica, Pontificia Universidad Católica, Casilla 306, Santiago 22, Chile
3 Zentrum für Astronomie, ITA, Universität Heidelberg, Albert-Überle-Str. 2, 69120 Heidelberg, Germany
Accepted: 10 October 2006
Aims.TV Ret was classified as a cataclysmic variable due to an outburst observed in 1977. We intended to confirm this classification and derive some basic properties of the system.
Methods.Low resolution optical spectra were obtained for a spectral classification of the object.
Results.We find that the object is not a cataclysmic variable but an emission line galaxy with a redshift . An R-image taken in very good seeing conditions shows that the object is extended.
Conclusions.We show that TV Ret is a blue dwarf galaxy, probably compact, with an absolute magnitude of MB = -17.5, a metallicity of 0.12 solar, and an average temperature of K. The line ratios place it among the H II galaxies, although close to the border of the Seyfert 2s. The outburst, which was observed in 1977, could thus be explained by a supernova explosion. However, with an absolute magnitude around MB = -21, it was an extremely bright one.
Key words: stars: dwarf novae / stars: individual: TV Ret / galaxies: dwarf / galaxies: starburst / galaxies: active
© ESO, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.