UV Absorption by Intermediate and High Velocity Galactic Gas toward PG0953+415

Details UV Absorption by Intermediate and High Velocity Galactic Gas toward PG0953+415 UV Absorption by Intermediate and High Velocity Galactic Gas toward PG0953+415

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.5303f&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #53.03; Bulletin of the American Astronomical Society, Vol. 31, p.1453

Other

Scientific paper

We present an analysis of the ultraviolet interstellar absorption lines seen with the STIS E140M grating at a spectral resolution of R 40,000 toward the quasar PG0953+415 (z=0.239, l=179° .79, b=+51° .71). This diffuse galactic halo sightline shows absorption due to zero velocity gas, two intermediate velocity clouds at VLSR=-75, +52 km s-1, and two high velocity clouds at VLSR=-150, +125 km s-1. A deep H 1 observation of this sightline with the Green Bank 140' indicates the presence of the intermediate velocity cloud IV16 at -75 km s-1, and a broad emission component covering the velocity range +75 km s-1 to +130 km s-1. IV16 is detected in Al 2, S 2, Fe 2, and Si 2 and we derive abundances from component fitting to those features. The positive velocity gas is highly ionized (Si 3/Si 2 3) and seen in two distinct components in C 2, Si 2, and Si 3. C 4 shows a broad absorption trough through those velocities. We also report the presence of a strong metal line absorption component at -150 km s-1 that is not seen in H 1 emission down to a detection limit of 8x1017 cm-2. Complex A ( 10° away) is the only gas in the vicinity at the proper velocity. This component is also highly ionized (Si 3/Si 2 1) and is seen in the strong neutral gas lines but not at all in the high ion species. We discuss the physical and chemical properties of these objects in the context of other HVC studies. We appreciate NASA support for this research through grant GO-06499.02 from STScI.

Affiliated with

Also associated with

No associations

Rating

UV Absorption by Intermediate and High Velocity Galactic Gas toward PG0953+415 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 UV Absorption by Intermediate and High Velocity Galactic Gas toward PG0953+415, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and UV Absorption by Intermediate and High Velocity Galactic Gas toward PG0953+415 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1740871