Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/VantagA1578tp.ps Дата изменения: Mon Apr 19 19:59:55 2004 Дата индексирования: Sat Sep 6 03:29:28 2008 Кодировка: Поисковые слова: ionization front

Proposal Identication No.: A1578 Date Received: 2001-Oct-01 13:16:14
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub-Category: Spectroscopy
Observation Category: Extragalactic
Total Time Requested: 64 Hours
Proposal Title: HI-rich Dwarf Galaxies and HI Clouds without Optical Counterparts in the Her-
cules Cluster
ABSTRACT:
Our project concerns two types of objects found in a VLA HI survey of the Hercules Cluster: 22 gas-rich dwarf
galaxies and 10 HI clouds without optical counterparts. The sensitivity of the Arecibo telescope is required for a
follow-up HI study. We will combine the HI data with our deep optical CCD images and spectroscopic data. The
Arecibo data will allow a precise determination of the HI prole parameters of the dwarf galaxies in the cluster,
which can be used to determine, e.g., the HI deciency parameter and dynamical properties of the sample. They
may also be used to identify detached Tidal Dwarf Galaxies. The HI sources without optical counterparts on our
deep CCD images were detected at the limit of the VLA sensitivity. If conrmed at Arecibo, their precise velocity
will be determined and compared to that of nearby spirals, in order to determine their origin.
Name Institution E-mail Phone Student
Wim van Driel Paris Observatory wim.vandriel@obspm.fr +33 -
145077731
no
I do NOT want to do remote observing.
Instrument Setup
L-narrow
Atmospheric Optical Instruments:
Special Equipment or setup: none
RFI Considerations
Frequency Ranges Planned
1360-1375
This proposal requires coordination with Punta Salinas radar within the band 1222-1381 MHz..
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