Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic On-line Article (HTML)
· Table of Contents
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
A Spatially Resolved Study of the Cold Dust in NGC~205
Authors:
Marleau, F. R.; Noriega-Crespo, A.; Misselt, K.; Gordon, K.; Rieke, G. H.; Barmby, P.; Willner, S.; Engelbracht, C.
Publication:
The Second Annual Spitzer Science Center Conference: Infrared Diagnostics of Galaxy Evolution. ASP Conference Series, Vol. 381, proceedings of the conference held 14-16 November, 2005 in Pasadena, California, USA. Edited by Ranga-Ram Chary, Harry I. Teplitz and Kartik Sheth. San Francisco: Astronomical Society of the Pacific, 2008., p.177
Publication Date:
03/2008
Origin:
ASP
Bibliographic Code:
2008ASPC..381..177M

Abstract

We present IRAC and MIPS observations of NGC~205, the dwarf elliptical companion of M31, obtained with the Spitzer Space Telescope. The extended dust emission is spatially concentrated in three main emission regions. Based on our mid-to-far infrared flux density measurements alone, we derive a total dust mass estimate of the order of 3.2 × 10^4 M_ȯ, at a temperature of ˜~20K. The gas mass associated with this component matches the predicted mass returned by the dying stars from the last burst of star formation in NGC~205 (˜0.5~Gyr ago). Analysis of the Spitzer data combined with previous 1.1mm observations over a small central region or ``Core'' (18 arcsec~diameter), suggest the presence of very cold (T˜ 12K) dust and a dust mass 16 times higher than is estimated from the Spitzer measurements alone. Assuming a gas to dust mass ratio of 100, these two datasets, i.e. with and without the millimeter observations, suggest a total gas mass range of 3.2 × 10^6 to 5 × 10^7 M_ȯ.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints