Journal ArticleDOI
Far Infrared and Submillimeter Emission from Galactic and Extragalactic Photo-Dissociation Regions
Reads0
Chats0
TLDR
In this article, the effects of metallicity and cloud extinction on the predicted line intensities were examined for PDR models with densities over the range n=10^1-10^7 cm^-3.Abstract:
Photodissociation Region (PDR) models are computed over a wide range of physical conditions, from those appropriate to giant molecular clouds illuminated by the interstellar radiation field to the conditions experienced by circumstellar disks very close to hot massive stars. These models use the most up-to-date values of atomic and molecular data, the most current chemical rate coefficients, and the newest grain photoelectric heating rates which include treatments of small grains and large molecules. In addition, we examine the effects of metallicity and cloud extinction on the predicted line intensities. Results are presented for PDR models with densities over the range n=10^1-10^7 cm^-3 and for incident far-ultraviolet radiation fields over the range G_0=10^-0.5-10^6.5, for metallicities Z=1 and 0.1 times the local Galactic value, and for a range of PDR cloud sizes. We present line strength and/or line ratio plots for a variety of useful PDR diagnostics: [C II] 158 micron, [O I] 63 and 145 micron, [C I] 370 and 609 micron, CO J=1-0, J=2-1, J=3-2, J=6-5 and J=15-14, as well as the strength of the far-infrared continuum. These plots will be useful for the interpretation of Galactic and extragalactic far infrared and submillimeter spectra observable with ISO, SOFIA, SWAS, FIRST and other orbital and suborbital platforms. As examples, we apply our results to ISO and ground based observations of M82, NGC 278, and the Large Magellenic Cloud.read more
Citations
More filters
Journal ArticleDOI
Astrochemistry and compositions of planetary systems
Karin I. Öberg,Edwin A. Bergin +1 more
TL;DR: A review of the chemical processes active in pre-and protostellar environments that set the initial conditions for disks, and the disk chemical processes that evolve the chemical conditions during the first million years of planet formation is given in this article.
Journal ArticleDOI
An extragalactic 12co j = 3-2 survey with the heinrich hertz telescope
Rui-Qing Mao,Rui-Qing Mao,Andreas Schulz,Andreas Schulz,Christian Henkel,Rainer Mauersberger,Dirk Muders,Dinh-V-Trung,Dinh-V-Trung +8 more
TL;DR: In this paper, the authors presented results of a {sup 12}CO J = 3-2 survey of 125 nearby galaxies obtained with the 10 m Heinrich Hertz Telescope, with the aim to characterize the properties of warm and dense molecular gas in a large variety of environments.
Journal ArticleDOI
A Detection of [C II] Line Emission in the z = 4.7 QSO BR 1202–0725
Daisuke Iono,Min S. Yun,Martin Elvis,Alison B. Peck,Paul T. P. Ho,Paul T. P. Ho,David J. Wilner,Todd R. Hunter,Satoki Matsushita,Sebastien Muller +9 more
TL;DR: In this paper, a 3'' resolution imaging of the z = 4.7 QSO BR 1202-0725 at 900 μm from the Submillimeter Array is presented.
Journal ArticleDOI
Physical conditions of the interstellar medium of high-redshift, strongly lensed submillimetre galaxies from the Herschel-ATLAS
Ivan Valtchanov,J. S. Virdee,J. S. Virdee,Rob Ivison,Rob Ivison,B. Swinyard,B. Swinyard,P. van der Werf,P. van der Werf,Dimitra Rigopoulou,Dimitra Rigopoulou,E. da Cunha,E. da Cunha,Roxana Lupu,Dominic J. Benford,Dominik A. Riechers,Ian Smail,Matt J. Jarvis,C. P. Pearson,Haley Louise Gomez,R. Hopwood,Bruno Altieri,Mark Birkinshaw,D. Coia,L. Conversi,Asantha Cooray,G. de Zotti,Loretta Dunne,David T. Frayer,Lerothodi Leonard Leeuw,Lerothodi Leonard Leeuw,A. Marston,Mattia Negrello,M. Sanchez Portal,Douglas Scott,Mark Thompson,Mattia Vaccari,Maarten Baes,David L. Clements,Michał J. Michałowski,Helmut Dannerbauer,Stephen Serjeant,Robbie Richard Auld,S. Buttiglione,Antonio Cava,Aliakbar Dariush,Simon Dye,Stephen Anthony Eales,Jacopo Fritz,Edo Ibar,Steve Maddox,Enzo Pascale,Michael Pohlen,E. E. Rigby,Giulia Rodighiero,Daniel J. Smith,Pasquale Temi,John M. Carpenter,Alberto D. Bolatto,Mark Gurwell,Joaquin Vieira +60 more
TL;DR: In this paper, the authors presented the first detection by Herschel of the [O iii] 88 μm line in a galaxy at redshift higher than 0.05 in the distant galaxies H-ATLAS J090311.6+003906 (SDP.81).
Journal ArticleDOI
CI and CO in the spiral galaxies NGC 6946 and M 83
F. P. Israel,F. Baas +1 more
TL;DR: In this article, the authors present a line-ratio analysis of the late-type spiral galaxies NGC 6946 and M 83 (NGC 5236) and show that the molecular medium in both galaxies consists of at least two separate components: a warm and dense component and a much more tenuous hot component.