Enhanced Warm H2 Emission in the Compact Group Mid-Infrared "Green Valley".
M.E. Cluver et al.
2013 in press in ApJ
The AMIGA Sample of Isolated Galaxies XI. Optical characterization of nuclear activity.
J. Sabater, L. Verdes-Montenegro, S. Leon, P. Best, J. W. Sulentic
2012 A&A 545, A.15S
Dpt. Astronomía Extragaláctica
Instituto Astrofísica Andalucía
Glorieta de la Astronomía s/n
Analysis of the interstellar Medium of Isolated GAlaxies
Secular evolution is thought to be a driving factor behind many aspects of galaxy morphology and structure. The challenge is to identify which properties are due to internal secular evolution and which are linked to formative evolution or external influences. Understanding internal mechanisms requires study of samples of isolated galaxies avoiding loose definitions like "the field", and comparison with matching samples of galaxies from well-defined denser environments. This is the aim of AMIGA project (Analysis of the interstellar Medium in Isolated GAlaxies).
An earlier phase of the project involved refinement of the CIG in order to produce a vetted catalogue of ~1000 isolated galaxies with a multiwavelength characterization (public access to the data is provided by a VO compliant interface). The catalogue provides a statistically significant list of galaxies that have not interacted with a significant mass neighbour in the past ~3Gyr. The current phase of the project is named AMIGA4GAS (AMIGA for GTC, ALMA, and SKA pathfinders, funded under AYA2011-30491-C02, co-funded by MICINN and FEDER funds) and builds on the results of AMIGA3 (AYA2008-06181).
Our multiwavelength studies made clear that the role of nurture has been reduced beyond anything yet achieved. The galaxies in our catalog show different physical properties from even loose groups: e.g. level of optical asymmetry, clumpiness and concentration, LFIR (< 10.5 Lsun), radio-excess above the radio-FIR correlation (0%), rate of AGNs (22%), or HI asymmetry (< 20%) are minimized (e.g. Verdes-Montenegro et al. 2005; Sulentic et al. 2006; Verley et al. 2007 a b c; Lisenfeld et al. 2007; Sabater et al. 2008; Leon et al. 2008; Espada et al. 2011).
The three major threads proposed in AMIGA4GAS are:
a) Testing the hypothesis that our sample is pseudobulge dominated, as a challenge to the hierarchical formation scenario
We also plan to go one step further with respect to our previous technical developments, designing and developping VO-services-based astronomical workflows for analysis and kinematical modelling of astronomical 3D data. Those are not only needed to support the science use cases of this project, but will also provide the astronomical community with a transparent, federated access to deploy computations into the existing heterogeneous computational infrastructures.
This project is a collaboration between astronomers at IAA (CSIC) and the FCSCL supercomputing centre. Activities will be carried out in close collaboration with the BSC, Portuguese Ibergrid initiative, LOFAR/TARGET in the Netherlands and PrepSKA activities.