NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-16 T12:06:08 PDT
Help | Comment | NED Home

For refcode 2000AJ....120.2460Y:
Retrieve 1 NED object in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2000AJ....120.2460Y PROPERTIES OF THE MOLECULAR CLOUDS IN NGC 205 L. M. YOUNG Department of Astronomy, New Mexico State University, Box 3000, MSC 4500, Las Cruces, NM 88003-8001, and Department of Physics, New Mexico Institute of Mining and Technology, Socorro, NM 87801; lyoung@aoc.nrao.edu Received 2000 April 18; accepted 2000 July 12 ABSTRACT The nearby dwarf elliptical galaxy NGC 205 offers a unique opportunity for high-resolution studies of the interstellar medium in an elliptical galaxy. The present paper investigates the distribution of molecular gas, molecular line ratios, and the relationships between atomic gas, molecular gas, and dust in this galaxy. The line ratios ^12^CO (2-1)/(1-0) and ^12^CO (1-0)/^13^CO (1-0) in one of the molecular clouds in NGC 205 are consistent with the ratios found in other elliptical galaxies and in Galactic giant molecular clouds; they suggest that the CO in this cloud is probably subthermally excited. Atomic gas, molecular gas, and dust are very closely associated on scales of ~100 pc; the atomic gas can be understood as a photodissociated envelope around the molecular clouds. The atomic column densities in this galaxy are quite low (~10^20^ cm^-2^) because the interstellar UV field is relatively low. The total gas-to-dust column density ratios are consistent with Galactic gas-to-dust ratios. In short, the molecular gas in NGC 205 seems to have properties very similar to the familiar molecular clouds in our own Galaxy except for the low atomic column densities. Key words: galaxies: elliptical and lenticular, cD-galaxies: individual (NGC 205)-galaxies: ISM-ISM: molecules-ISM: structure-Local Group
Retrieve 1 NED object in this reference.
Please click here for ADS abstract

Back to NED Home