Computer Science
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30192s&link_type=abstract
Spitzer Proposal ID #30192
Computer Science
Scientific paper
We propose to observe a sample of 8 novae in the bulge and disk of M31 using IRAC and IRS as part of the first systematic extragalactic survey of novae in the infrared. The nova sample will be selected from the second year of an ongoing M31 nova patrol. The IRAC photometry will be used to search for the ~1000K thermal emission from dust grains formed in the ejecta, while the IRS data will be used to search for the prominent Ne emission lines at 7.6 and 12.8um. Observations of Galactic novae suggest that novae exhibiting prominent dust shells arise from systems containing CO white dwarfs, while those that display significant Ne emission are associated with novae harboring more massive ONeMg white dwatfs, and thus the two types of novae appear to be mutually exclusive. Stellar population models predict that nova binaries containing ONeMg white dwarfs are more common in younger stellar populations, such as the Galactic disk, but are rare in the older stellar populations found in the bulges of spirals, where CO white dwarfs should dominate. It is difficult to test this prediction in the Galaxy, since the majority of Galactic novae are consistent with an association with a disk population. However, a comparison of the IR properties of novae in M31's bulge with well-studied Galactic disk novae (and perhaps with M31 disk novae), will provide an important constraint on the properties of novae from differing stellar populations.
Bode Michael
Misselt Karl
Shafter Allen
No associations
LandOfFree
A Spitzer Survey of Selected Novae in M31 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Spitzer Survey of Selected Novae in M31, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Spitzer Survey of Selected Novae in M31 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-933208