The Gaseous Environment of the Ursa Minor Dwarf Spheroidal Galaxy: CYCLE3 Medium

Details The Gaseous Environment of the Ursa Minor Dwarf Spheroidal Galaxy: CYCLE3 Medium The Gaseous Environment of the Ursa Minor Dwarf Spheroidal Galaxy: CYCLE3 Medium

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993hst..prop.4323o&link_type=abstract

HST Proposal ID #4323

Computer Science

Hst Proposal Id #4323

Scientific paper

We propose to probe the interstellar gas content of the Ursa Minor dwarf spheroidal galaxy. We have discovered a V=18.5 QSO at approximately 1 core radius from the center of UMi. We will use the FOS to look for EUV absorption lines from gas in UMi. This technique complements ground-based H I measurements, and X-ray imaging. Some of the dSph, e.g., Carina, made a significant 2nd generation of stars a few Gyr ago, despite their current low limits on gas, low stellar densities, and low escape velocity. It is still a mystery why we do not detect significant gas lost during stellar evolution. This problem is compounded in the dSph because, unlike in the analogous globular cluster gas problem, the dSph gravitational potential is dominated by dark matter, which may confine the gas. Further, Silk, Wyse, and Shields (1987) have proposed that gas lost by galaxies at high redshift can cool and accrete onto dE galaxies. There may thus be large reservoirs of gas that can be detected by UV spectroscopy. We intend to use the G270H grating, which allows us to observe the Mg II doublet, Mg I, Fe II lines, and weak Fe I, Al I, Mn II, and Ti II lines. Because of the patchy nature of the Milky Way high velocity halo gas, we will also observe a brighter, nearby QSO to ensure that we can ascribe any detections to UMi. Finally we will take a low resolution, G160L, spectrum to see if the UMi QSO is clear of Lyman limits for future work.

Affiliated with

Also associated with

No associations

Rating

The Gaseous Environment of the Ursa Minor Dwarf Spheroidal Galaxy: CYCLE3 Medium 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 Gaseous Environment of the Ursa Minor Dwarf Spheroidal Galaxy: CYCLE3 Medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Gaseous Environment of the Ursa Minor Dwarf Spheroidal Galaxy: CYCLE3 Medium will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1071323