Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/DendytagA1344tp.ps Дата изменения: Mon Apr 19 19:59:26 2004 Дата индексирования: Sat Dec 22 20:59:24 2007 Кодировка: Поисковые слова: trifid nebula

Proposal Identication No.: A1344 Date Received: 2000-Oct-01 11:57:29
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub-Category: Spectroscopy
Observation Category: Extragalactic
Total Time Requested: 25 Hours
Proposal Title: Constraining the CDM Theory with the Star Formation Histories of Low-Luminosity
Early-Type Galaxies
ABSTRACT:
Recent numerical simulations of the CDM theory provide predictions that are easily testable with astronomical
observations. This hierarchical scenario ultimately predicts that the ages of smaller mass systems should be older
than their larger counterparts. To provide constraints to this model, we have initiated a study of low-luminosity
early-type galaxies in the Virgo cluster. Spectroscopic age diagnostics already indicate that this sample has
experienced a large range of star formation histories with a signicant fraction having extremely young ages.
Understanding how these observations constrain the predictions of the CDM model and what they tell us about the
evolution of galaxies in clusters requires information about the star formation histories of these galaxies that is
obtainable with HI mapping of each sample galaxy. Thus, the motivation of this proposal is to obtain 21cm
observations which will reveal the nature, amount and location of gas available to fuel the star formation episodes.
Name Institution E-mail Phone Student
Kristi Dendy University of North
Carolina at Chapel
Hill
dendy@physics.unc.edu 919-962-3683 G
I NA want to do remote observing.
Instrument Setup
L-narrow
Atmospheric Optical Instruments:
Special Equipment or setup: none
RFI Considerations
Frequency Ranges Planned
1