Study of a New Class of Nova-Like Variables

Details Study of a New Class of Nova-Like Variables Study of a New Class of Nova-Like Variables

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3242a&link_type=abstract

Spitzer Proposal ID #3242

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Scientific paper

There have recently been instances of nova-like explosions on two stars viz. V4332 Sgr and V838 Mon which have evoked keen and sustained interest in a large segment of the astronomical community. This interest has been heightened by the spectacular and rare light echo seen around V838 Mon. Both these objects - for which we have proposed the name quasi-novae - have displayed outburst properties which are significantly different from other known classes of eruptive variables like classical novae, symbiotic novae or born-gain AGB stars. Though the cause for their outburst is poorly understood at present, it is being recognized that the mechanism involved could be fundamentally different from conventional scenarios for classical novae eruptions. Thus there is an imperative need to study these objects in greater detail. Available data on them, as elaborated in the science case, shows a richness in their optical and near-IR spectra that is truly exceptional. We wish to study these objects further in the mid and far-IR regime. Such a study will help to get better insights into the cool circumstellar environment of this new class of objects and understand the nature of their outburst better. The proposed objects have already yielded very interesting optical and near-IR results so far. We anticipate - with a fair deal of conviction - that mid/far-IR studies will yield equally striking results. The Spitzer Space Telescope provides a unique opportunity - that does not come often - for carrying out such studies.

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