Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 710069.0, MPI für Astronomie / Publikationen_mpia
Revealing the light from old stars: Stars, dust, and PAH emission in S4G Infrared Array Camera 3.6 and 4.5 mm Images
Authors:Querejeta, M.; Meidt, S. E.; Schinnerer, E.; Collaboration, S. 4. G.
Place of Publication:San Francisco
Publisher:ASP
Date of Publication (YYYY-MM-DD):2014
Audience:Not Specified
Abstract / Description:The Spitzer Survey of Stellar Structure in Galaxies imaged 2352 nearby galaxies (D<40 Mpc) in two Infrared Array Camera bands: 3.6 and 4.5mum, an optimal window to trace stellar mass, since most emission comes from the old stars that dominate the baryonic mass budget. However, contamination from non-stellar sources can locally be significant in these bands, severely biasing the derived mass distributions in some regions. Here, we explore the automatic application of a published method to correct for that non-stellar emission, which is based on an independent component analysis technique. Defining the best strategy to apply the above technique to the whole sample has allowed us to obtain contaminant-free maps of the old stellar flux for hundreds of galaxies, which are readily convertible into mass maps. Their public release provides a powerful tool for studies of stellar structure and secular evolution.
External Publication Status:published
Document Type:Other
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://cdsads.u-strasbg.fr/abs/2014ASPC..486..143Q
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.