The Spitzer survey of stellar structure in galaxies (S⁴G) : multi-component decomposition strategies and data release
- Salo, Heikki
- Laurikainen, Eija
- Laine, Jarkko
- Comeron, Sebastien
- Gadotti, Dimitri A
- Buta, Ron
- Sheth, Kartik
- Zaritsky, Dennis
- Ho, Luis
- Knapen, Johan
- Athanassoula, E
- Bosma, Albert
- Laine, Seppo
- Cisternas, Mauricio
- Kim, Taehyun
- Munoz-Mateos, Juan Carlos
- Regan, Michael
- Hinz, Joannah L
- Gil de Paz, Armando
- Menendez-Delmestre, Karin
- Mizusawa, Trisha
- Erroz-Ferrer, Santiago
- van der Wel, Sharon Meidt
- Querejeta, Miguel
DOIAbstract
The Spitzer Survey of Stellar Structure in Galaxies (S(4)G) is a deep 3.6 and 4.5 mu m imaging survey of 2352 nearby (<40 Mpc) galaxies. We describe the S(4)G data analysis pipeline 4, which is dedicated to two-dimensional structural surface brightness decompositions of 3.6 mu m images, using GALFIT3.0. Besides automatic 1-component Sersic fits, and 2-component Sersic bulge + exponential disk fits, we present human-supervised multi-component decompositions, which include, when judged appropriate, a central point source, bulge, disk, and bar components. Comparison of the fitted parameters indicates that multi-component models are needed to obtain reliable estimates for the bulge Sersic index and bulge-to-total light ratio (B/T), confirming e...
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