The AMIGA sample of isolated galaxies. III. IRAS data and infrared diagnostics

Ute Lisenfeld (1) , L. Verdes-Montenegro (2) , Jack W. Sulentic (3) , Sylvie Léon (4) , D. Espada (2) , Gilles Bergond (2, 5) , E. Garciá (2) , J. Sabater (2) , J. D. Santander-Vela (2) , Simon Verley (2, 6)

1 UGR - Universidad de Granada = University of Granada
2 IAA - Instituto de Astrofísica de Andalucía
3 Department of Astronomy, University of Alabama
4 IRAM - Instituto de Radio Astronomía Milimétrica
5 GEPI - Galaxies, Etoiles, Physique, Instrumentation
6 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique

Aims:We describe the mid- (MIR) and far- (FIR) infrared properties of a large (~1000) sample of the most isolated galaxies in the local Universe. This sample is intended as a "nurture-free" zero point against which more environmentally influenced samples can be compared.
Methods: We reprocess IRAS MIR/FIR survey data using the ADDSCAN/SCANPI utility for 1030 out of 1050 galaxies from the Catalogue of Isolated Galaxies (CIG) as part of the AMIGA project. We focus on diagnostics (FIR luminosity L_FIR, R=log(L_FIR/L_B), and IRAS colours) thought to be sensitive to effects of environment or interaction.
Results: The distribution of log(L_FIR) sharply peaks from 9.0-10.5, with very few (

Domaines: Astrophysique [astro-ph]; Planète et Univers [physics]

Ute Lisenfeld, L. Verdes-Montenegro, Jack W. Sulentic, Sylvie Léon, D. Espada, et al.. The AMIGA sample of isolated galaxies. III. IRAS data and infrared diagnostics. Astronomy and Astrophysics - A&A, 2007, 462, pp.507-523. ⟨10.1051/0004-6361:20066144⟩. ⟨hal-03797023⟩