Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/DarlingtagA1342tp.ps Дата изменения: Mon Apr 19 19:59:26 2004 Дата индексирования: Sat Dec 22 22:35:43 2007 Кодировка: Поисковые слова: agn

Proposal Identication No.: A1342 Date Received: 1999-Sep-30 11:39:00
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub-Category: Spectroscopy
Observation Category: Extragalactic
Total Time Requested: 40 Hours
Proposal Title: Are OH Megamasers Produced Exclusively in Mergers?
ABSTRACT:
We propose to investigate the types of environments which produce OH megamasers (OHMs) by conducting a
small search for OHM emission from FIR-faint AGN. We intend to disentangle the in uence of AGN and merger
activity on the formation of OH megamasers by searching for them in environments which do not display any
evidence of ongoing merger activity. To maximize column density, we choose Seyfert type 2 AGN for the study, as
they are thought to be AGN viewed \edge-on" with respect to the circumnuclear torus in the standard AGN
model. Selection of Sey 2 at low redshift (z < 0:05) which are undetected in the IRAS PSC and FSC places a
strong constraint on ongoing merger activity. A sample of 30 FIR-faint Sey 2 is adequate to both (i) provide a
meaningful upper limit on non-merger OHM contamination of blind OHM surveys, and (ii) provide a reasonable
probability of OHM detection if AGN have a signicant in uence on OHM activity. We request 40 hours of
observing time on the L-wide receiver for this study.
Name Institution E-mail Phone Student
Jeremy K Darling Cornell University darling@astrosun.tn.cornell.edu 607 255 6472 G
Instrument Setup
L-wide
Atmospheric Optical Instruments:
Special Equipment or setup: none
RFI Considerations
Frequency Ranges Planned
1588-1667
This proposal requires Iridium RFI protection at 1612 MHz between 10pm and 6am EST.
1