Mid Infrared Spectroscopy of Galactic Novae

Details Mid Infrared Spectroscopy of Galactic Novae Mid Infrared Spectroscopy of Galactic Novae

Nov 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.277..259s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 277, NO. 1/NOV1, P. 259, 1995

Astronomy and Astrophysics

Astronomy

17

Novae, Cataclysmic Variables - Dust, Extinction - Infrared: Stars

Scientific paper

We present 8 - 13 μm spectroscopy of 10 galactic novae. In 6 of these 10 novae, dust has formed in the ejecta. Each of these 6 cases shows evidence for silicate dust as well as carbon/graphitic dust. Despite limited statistics, it seems clear that the formation of silicate dust as well as carbon dust is a common occurrence in nova ejecta, despite the nova progenitor being generally carbon rich. For carbon and silicate grains to co-exist, the nova ejecta must be chemically and/or spatially inhomogeneous. In the case of Nova Her 91 there is evidence to suggest that the silicate emission may arise from a light echo from silicate grains deposited in a previous nova eruption. In Nova Sco 92 we have identified an extra emission component in the 8 - 9.5 μm region of the spectrum which is possibly due to emission from SiO molecules in the ejecta.

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