SUMMARY OF PROPOSAL 72093
UNIVERSITY OF MICHIGAN
500 CHURCH STREET
ANN ARBOR
MICHIGAN USA 48109-1090
Tel: (734) 764-3412 Fax: (734) 763-6317
Medium: CD ROM
Subject: AGN
THE MASS AND DISTRIBUTION OF MOLECULAR GAS IN THE GALAXY
ABSTRACT
Molecular absorption line studies and X-ray absorption observations toward extragalactic sight lines indicate that molecular gas is as abundant as neutral atomic gas in the Solar vicinity. At larger Galactic radii, H2 exceeds HI in some locations, and if this is generally true, it implies a dramatic revision in the picture of neutral gas in disk galaxies. To determine if H2 dominates the ISM at large radii, we propose to measure the X-ray absorption column toward AGNs projected behind the outer part of the Galactic disk, which is expected to be about 1E22/cm2. The H2 column is the difference between the X-ray absorption column and the observed HI 21 cm column.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| JOEL BREGMAN | UNIV. OF MICHIGAN | USA |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)1RXSJ024457.8+622810 | C | 41.2408 | 62.4696 | 20 ks | N | N | P | 0.98590 | 1 |
| 2)1RXSJ003552.8+595006 | C | 8.9700 | 59.8350 | 20 ks | N | N | P | 0.88260 | 1 |
| 3)1RXSJ013748.0+581422 | C | 24.4500 | 58.2396 | 20 ks | N | N | P | 0.69980 | 1 |