Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-12-31
Astronomy and Astrophysics
Astrophysics
2 pages, 1 figure, To appear in the proceedings of the conference "Formation and Evolution of Galaxy Disks", Rome, Italy, 1-5
Scientific paper
The extreme outer Galaxy (EOG) has a very different environment from that in the solar neighborhood, with low metallicity (less than -0.5 dex), much lower gas density, and small or no perturbation from spiral arms. The EOG is an excellent laboratory for the study of the star formation processes that happened during the formation period of the Galaxy. In particular, the study of the EOG may shed light on the origin and role of the thick disk, whose metallicity range matches well with that of the EOG. We show an example of a molecular cloud in the EOG (Digel's Cloud 2), which is located at R_g ~ 20 kpc beyond the Outer arm. Based on our NIR and 12CO data as well as HI, radio continuum, and IRAS data in the archives, we examined the detailed star formation processes in this unique environment, especially the supernova triggered star formation, which should have been the major star formation mode during the halo and thick disk formation.
Kobayashi Naoto
Saito Masao
Tokunaga Alan T.
Yasui Chikako
No associations
LandOfFree
Extreme Outer Galaxy: A Laboratory of Star Formation in an Early Epoch of Galaxy Formation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Extreme Outer Galaxy: A Laboratory of Star Formation in an Early Epoch of Galaxy Formation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extreme Outer Galaxy: A Laboratory of Star Formation in an Early Epoch of Galaxy Formation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-235223