The Evolutionary History of Galactic Bulges: Photometric and Spectroscopic Studies of Distant Spheroids in the GOODS Fields

Details The Evolutionary History of Galactic Bulges: Photometric and Spectroscopic Studies of Distant Spheroids in the GOODS Fields The Evolutionary History of Galactic Bulges: Photometric and Spectroscopic Studies of Distant Spheroids in the GOODS Fields

2007-11-02

arxiv.org/abs/0711.0238v1

Astronomy and Astrophysics

Astrophysics

32 pages, 13 embedded color figures, uses emulateapj.cls. Submitted to ApJ. High-resolution version available at http://www.

Scientific paper

10.1086/587887

We report on the first results of a new study aimed at understanding the diversity and evolutionary history of distant galactic bulges in the context of now well-established trends for pure spheroidal galaxies. To this end, bulges have been isolated for a sample of 137 spiral galaxies within the redshift range 0.10.2 show very similar patterns of evolution to those seen for pure spheroidals such that the stellar populations of all spheroids with M>10^{11}Msun are homogeneously old, consistent with a single major burst of star formation at high redshift (z_f<~2), while bulges with M<10^{11}Msun must have had more recent stellar mass growth (~10% in mass since z~1). Although further data spanning a wider range of redshift and mass is desirable, the striking similarity between the assembly histories of bulges and low mass spheroidals is difficult to reconcile with the picture whereby the majority of large bulges form primarily via secular processes within spiral galaxies.

Affiliated with

Also associated with

No associations

Rating

The Evolutionary History of Galactic Bulges: Photometric and Spectroscopic Studies of Distant Spheroids in the GOODS Fields 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 The Evolutionary History of Galactic Bulges: Photometric and Spectroscopic Studies of Distant Spheroids in the GOODS Fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Evolutionary History of Galactic Bulges: Photometric and Spectroscopic Studies of Distant Spheroids in the GOODS Fields will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-437089