Detection of Diatomic Molecules in the Dust Forming Nova V2676 Oph

Authors

  • M. Nagashima Kyoto Sangyo University, Koyama Astronomical Observatory
  • A. Arai Kyoto Sangyo University, Koyama Astronomical Observatory University of Hyogo, Nishi-Harima Astronomical Observatory
  • T. Kajikawa Kyoto Sangyo University, Koyama Astronomical Observatory
  • H. Kawakita Kyoto Sangyo University, Koyama Astronomical Observatory
  • E. Kitao Kyoto Sangyo University, Koyama Astronomical Observatory
  • T. Arasaki Kyoto Sangyo University, Koyama Astronomical Observatory
  • G. Taguchi Kyoto Sangyo University, Koyama Astronomical Observatory
  • Y. Ikeda

DOI:

https://doi.org/10.14311/APP.2015.02.0212

Abstract

Novae are generally considered to be hot astronomical objects and show effective temperatures up to 10,000 K or higher at their visual maximum. But, it is theoretically predicted that the outer envelope of the nova outflow can become cool enough to form molecules that would be dissociated at high temperatures. We detected strong absorption bands of C2 and CN radicals in the optical spectrum of Nova V2676 Oph, a very slow nova with dust formation. This is the first report of the detection of C2 and the second one of CN in novae during outburst. Although such simple molecules are predicted to form in the envelope of the outflow based on previous studies, there are few reports of their detection. In the case of V2676 Oph, the presence of the molecular envelope is considered to be very transient, lasting several days only.

Downloads

Published

2015-02-23

Issue

Vol. 2 No. 1 (2015): THE GOLDEN AGE OF CATACLYSMIC VARIABLES AND RELATED OBJECTS - II

Section

Articles

License

Copyright notice

Authors who publish with this journal agree to the following terms:

1. Authors retain copyright and grant the journal the right of the first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., to post it to an institutional repository or to publish it in a book), with an acknowledgement of its initial publication in this journal.
3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges as well as earlier and greater citation of the published work (See The Effect of Open Access).