Statistics – Methodology
Scientific paper
Mar 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50213r&link_type=abstract
Spitzer Proposal ID #50213
Statistics
Methodology
Scientific paper
We propose to search for shocked molecular hydrogen emission in 4 infalling cluster galaxies with strong evidence for ram-pressure stripping to understand how galaxies are transformed in the cluster environment. With IRS, Appleton et al. (2006) have observed strong molecular hydrogen emission emanating from Stefan's Quintet which can only be interpreted as a galactic scale shock created from the collision of galaxies with the intragroup medium. Spitzer spectroscopy offers a direct and quantitative way to observe interactions between the intragroup/intracluster medium and the galactic interstellar medium unlike other techniques that only observe after-effects of gas-stripping events. We will use IRS spectral mapping, following the methodology of Appleton et al., of the four likeliest nearby candidates for ICM/ISM interactions. These candidates have a variety of telltale signs that they are undergoing some form of interaction with the ICM, such as bow-shock like star-forming regions, H-alpha and X-ray tails, extraplanar HII regions, etc. We also propose to acquire ancillary deep IRAC data to improve the spatial resolution of our IRS data as 4.5-micron IRAC data are sensitive to molecular hydrogen emission. Combined with 8-micron imaging we can distinguish between molecular hydrogen emission produced in shocks and in photodissociation regions found in star-forming regions. We will also study the star-forming properties of these galaxies and how they relate to galactic scale shocks.
Rieke George
Rieke Marcia
Sivanandam Suresh
No associations
LandOfFree
Molecular Hydrogen Shocks As Tracers of Galaxy Evolution 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 Molecular Hydrogen Shocks As Tracers of Galaxy Evolution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molecular Hydrogen Shocks As Tracers of Galaxy Evolution will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-884807