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26 April 2024

» arxiv » 1005.1455

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PTF10fqs: A Luminous Red Nova in the Spiral Galaxy Messier 99
Mansi M. Kasliwal ; S. R. Kulkarni ; Robert M. Quimby ; Eran O. Ofek ; Peter Nugent ; Janet Jacobsen ; Avishay Gal-Yam ; Yoav Green ; Iair Arcavi ; Ofer Yaron ; Jacob L. Howell ; Derek B. Fox ; S. Bradley Cenko ; Io Kleiser ; Joshua S. Bloom ; Adam Miller ; Dovi Poznanski ; Weidong Li ; Alexei V. Filippenko ; Dan Starr ; Nicholas M. Law ; George Helou ; Dale A. Frail ; James D. Neill ; Karl Forster ; D. Christopher Martin ; Shriharsh P. Tendulkar ; Neil Gehrels ; Jamie Kennea ; Mark Sullivan ; Richard Dekany ; Gustavo Rahmer ; David Hale ; Roger Smith ; Jeff Zolkower ; Viswa Velur ; Richard Walters ; John Henning ; Kahnh Bui ; Dan McKenna ; Cullen Blake ;
Date:	10 May 2010
Abstract:	The Palomar Transient Factory (PTF) is systematically charting the optical transient and variable sky. A primary science driver of PTF is building a complete inventory of transients in the local Universe (distance less than 200 Mpc). Here, we report the discovery of PTF10fqs, a transient in the luminosity "gap" between novae and supernovae. Located in the spiral arm of Messier 99, PTF10fqs is red, slowly evolving and has a spectrum dominated by intermediate width Halpha and Calcium lines. The explosion signature is similar to M85OT2006-1, SN2008S and NGC300-OT. The origin of these events is shrouded in mystery, controversy (and in some cases, in dust). PTF10fqs shows some evidence of a broad feature (around 8600A) that may suggest very large velocities in this explosion (~10000 km/s). Ongoing surveys can be expected to find a few such events per year. Sensitive spectroscopy and statistics (disk versus bulge) will eventually make it possible for astronomers to unravel the nature of these mysterious explosions.
Source:	arXiv, 1005.1455
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