Are Low Surface Brightness Disks Young?

Details Are Low Surface Brightness Disks Young? Are Low Surface Brightness Disks Young?

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...481l..27p&link_type=abstract

Astrophysical Journal Letters v.481, p.L27

Astronomy and Astrophysics

Astronomy

16

Galaxies: Formation, Galaxies: Fundamental Parameters, Galaxies: Evolution

Scientific paper

We reconsider the problem of the age of the stellar disks of late-type low surface brightness galaxies (LSBs) by making use of a new IMF recently derived from numerical fluid dynamics simulations (Padoan, Nordlund, & Jones 1997), and a new synthetic stellar population code, based on Jimenez & MacDonald (1997) evolutionary tracks and Kurucz atmospheric models (Kurucz 1992). We find that the disks of LSBs are not necessarily formed very recently. Their colors seem to indicate that the disks of LSBs started to form stars at least 7 Gyr ago, and more likely about 9 Gyr ago, and therefore contrary to what has been claimed in the literature disks of LSBs are not young.

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