Gas Density, Stability, and Starbursts Near the Inner Lindblad Resonance of the Milky Way
A key project of the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO) reported by Martin et al. (2004) is the mapping of CO J=4-3 and J=7-6 emission from the inner Milky Way, allowing determination of gas density and temperature. Galactic center gas that Binney et al. (1991) identif...
Main Authors: | , , , , , |
---|---|
Language: | English |
Published: |
2004
|
Subjects: | |
Online Access: | http://cds.cern.ch/record/735486 |
id |
ftcern:oai:cds.cern.ch:735486 |
---|---|
record_format |
openpolar |
spelling |
ftcern:oai:cds.cern.ch:735486 2023-05-15T13:47:45+02:00 Gas Density, Stability, and Starbursts Near the Inner Lindblad Resonance of the Milky Way Stark, A A Martin, C L Walsh, W M Xiao, K Lane, A P Walker, C K 2004 http://cds.cern.ch/record/735486 eng eng http://cds.cern.ch/record/735486 astro-ph/0405330 oai:cds.cern.ch:735486 Astrophysics and Astronomy 2004 ftcern 2018-07-28T06:42:38Z A key project of the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO) reported by Martin et al. (2004) is the mapping of CO J=4-3 and J=7-6 emission from the inner Milky Way, allowing determination of gas density and temperature. Galactic center gas that Binney et al. (1991) identify as being on x_2 orbits has a density near 10^3.5 cm ^-3, which renders it only marginally stable against gravitational coagulation into a few Giant Molecular Clouds, as discussed by Elmegreen (1994). This suggests a relaxation oscillator mechanism for starbursts in the Milky Way, where inflowing gas accumulates in a ring at 150 pc radius for approximately 20 million years, until the critical density is reached, and the resulting instability leads to the sudden formation of giant clouds and the deposition of 4 x 10^7 solar masses of gas onto the Galactic center. Other/Unknown Material Antarc* Antarctic CERN Document Server (CDS) Antarctic Milky Way ENVELOPE(-68.705,-68.705,-71.251,-71.251) The Antarctic |
institution |
Open Polar |
collection |
CERN Document Server (CDS) |
op_collection_id |
ftcern |
language |
English |
topic |
Astrophysics and Astronomy |
spellingShingle |
Astrophysics and Astronomy Stark, A A Martin, C L Walsh, W M Xiao, K Lane, A P Walker, C K Gas Density, Stability, and Starbursts Near the Inner Lindblad Resonance of the Milky Way |
topic_facet |
Astrophysics and Astronomy |
description |
A key project of the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO) reported by Martin et al. (2004) is the mapping of CO J=4-3 and J=7-6 emission from the inner Milky Way, allowing determination of gas density and temperature. Galactic center gas that Binney et al. (1991) identify as being on x_2 orbits has a density near 10^3.5 cm ^-3, which renders it only marginally stable against gravitational coagulation into a few Giant Molecular Clouds, as discussed by Elmegreen (1994). This suggests a relaxation oscillator mechanism for starbursts in the Milky Way, where inflowing gas accumulates in a ring at 150 pc radius for approximately 20 million years, until the critical density is reached, and the resulting instability leads to the sudden formation of giant clouds and the deposition of 4 x 10^7 solar masses of gas onto the Galactic center. |
author |
Stark, A A Martin, C L Walsh, W M Xiao, K Lane, A P Walker, C K |
author_facet |
Stark, A A Martin, C L Walsh, W M Xiao, K Lane, A P Walker, C K |
author_sort |
Stark, A A |
title |
Gas Density, Stability, and Starbursts Near the Inner Lindblad Resonance of the Milky Way |
title_short |
Gas Density, Stability, and Starbursts Near the Inner Lindblad Resonance of the Milky Way |
title_full |
Gas Density, Stability, and Starbursts Near the Inner Lindblad Resonance of the Milky Way |
title_fullStr |
Gas Density, Stability, and Starbursts Near the Inner Lindblad Resonance of the Milky Way |
title_full_unstemmed |
Gas Density, Stability, and Starbursts Near the Inner Lindblad Resonance of the Milky Way |
title_sort |
gas density, stability, and starbursts near the inner lindblad resonance of the milky way |
publishDate |
2004 |
url |
http://cds.cern.ch/record/735486 |
long_lat |
ENVELOPE(-68.705,-68.705,-71.251,-71.251) |
geographic |
Antarctic Milky Way The Antarctic |
geographic_facet |
Antarctic Milky Way The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://cds.cern.ch/record/735486 astro-ph/0405330 oai:cds.cern.ch:735486 |
_version_ |
1766247813556994048 |