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The Thick Disk in the Galaxy NGC 4244 from S4G Imaging

Bibcode
2011ApJ...729...18C
DOI
10.1088/0004-637X/729/1/18
Comerón, S.; Knapen, J. H.; Sheth, Kartik; Regan, Michael W.; Hinz, Joannah L.; Gil de Paz, Armando; Menéndez-Delmestre, Karín; Muñoz-Mateos, Juan-Carlos; Seibert, Mark; Kim, Taehyun; Athanassoula, E.; Bosma, Albert; Buta, Ronald J.; Elmegreen, Bruce G.; Ho, Luis C.; Holwerda, Benne W.; Laurikainen, Eija; Salo, Heikki; Schinnerer, Eva
Bibliographical reference

The Astrophysical Journal, Volume 729, Issue 1, article id. 18 (2011).

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3
2011
Journal
The Astrophysical Journal
Number of authors
19
IAC number of authors
2
Citations
41
Refereed citations
33
Description
If thick disks are ubiquitous and a natural product of disk galaxy formation and/or evolution processes, all undisturbed galaxies that have evolved during a significant fraction of a Hubble time should have a thick disk. The late-type spiral galaxy NGC 4244 has been reported as the only nearby edge-on galaxy without a confirmed thick disk. Using data from the Spitzer Survey of Stellar Structure in Galaxies (S4G) we have identified signs of two disk components in this galaxy. The asymmetries between the light profiles on both sides of the mid-plane of NGC 4244 can be explained by a combination of the galaxy not being perfectly edge-on and a certain degree of opacity of the thin disk. We argue that the subtlety of the thick disk is a consequence of either a limited secular evolution in NGC 4244, a small fraction of stellar material in the fragments which built the galaxy, or a high amount of gaseous accretion after the formation of the galaxy.
Related projects
Project Image
Spiral Galaxies: Evolution and Consequences

Our small group is well known and respected internationally for our innovative and important work on various aspects of the structure and evolution of nearby spiral galaxies. We primarily use observations at various wavelengths, exploiting synergies that allow us to answer the most pertinent questions relating to what the main properties of

Johan Hendrik
Knapen Koelstra
In progress
Type
Refereed
Galaxies
Photometry
Formation & Evolution of Galaxies (FYEG)

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