How Was the Galactic Halo Formed? Quantifying the Amount of Substructure in the Milky Way Halo (Imaging)

Details How Was the Galactic Halo Formed? Quantifying the Amount of Substructure in the Milky Way Halo (Imaging) How Was the Galactic Halo Formed? Quantifying the Amount of Substructure in the Milky Way Halo (Imaging)

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999noao.prop..290o&link_type=abstract

NOAO Proposal ID #1999A-0290

Computer Science

Scientific paper

A significant amount of the Galaxy's halo may have formed by the accretion of dwarf satellites of the Milky Way, and it seems that this process continues to the present day. The most spectacular piece of evidence for this view is the recent discovery of the Sagittarus dwarf galaxy, ``caught in the act'' of merging with the Milky Way. There is also intriguing evidence of older accretions: kinematic substructure in halo field stars (eg Cote ηl 1993, Majewski ηl 1994), and halo stars with ages substantially younger than most of the halo (Preston ηl 1994). We have begun a major survey to map the Galaxy's halo and to put limits on the amount of the halo which has arrived in the past few Gyr, by searching for kinematic substructure. The survey is optimized for the detection of distant halo stars (presently only ~30 field stars are known with R_GC> 30 kpc) and we will increase this number by an order of magnitude when the survey is completed. We use CCD Washington photometry to identify halo stars, and spectroscopic observations to obtain velocities. We ask for BTC time here, and argue that BTC is better than the Schmidt for this survey.

Affiliated with

Also associated with

No associations

Rating

How Was the Galactic Halo Formed? Quantifying the Amount of Substructure in the Milky Way Halo (Imaging) 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 How Was the Galactic Halo Formed? Quantifying the Amount of Substructure in the Milky Way Halo (Imaging), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and How Was the Galactic Halo Formed? Quantifying the Amount of Substructure in the Milky Way Halo (Imaging) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-948337