Sign on
ADS Classic is now deprecated. It will be completely retired in October 2019. Please redirect your searches to the new ADS modern form or the classic form. More info can be found on our blog.

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (280) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (4)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Infrared spectroscopy of dense clouds in the C-H stretch region - Methanol and 'diamonds'
Authors:
Allamandola, L. J.; Sandford, S. A.; Tielens, A. G. G. M.; Herbst, T. M.
Affiliation:
AA(NASA, Ames Research Center, Moffett Field, CA), AB(NASA, Ames Research Center, Moffett Field, CA), AC(NASA, Ames Research Center, Moffett Field, CA), AD(Hawaii Univ., Honolulu)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 399, no. 1, p. 134-146. (ApJ Homepage)
Publication Date:
11/1992
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Hydrocarbons, Infrared Spectroscopy, Methyl Alcohol, Molecular Clouds, Protostars, Spectral Bands, Absorption Spectra, Astronomical Spectroscopy, Cosmic Dust, Interstellar Matter, Spectral Resolution
DOI:
10.1086/171909
Bibliographic Code:
1992ApJ...399..134A

Abstract

The paper presents high spectral resolution studies in the 3100-2600/cm range of the protostars NGC 7538 IRS9, W33A, W3 IRS 5, and S140 IRS 1. Well-resolved absorption bands at about 2825/cm and 2880/cm were found superposed on the LF wing of the strong O-H stretch feature. The 2880/cm band, previously detected toward W33A, is also in the spectrum of NGC 7538 IRS 9. The relative strength of these two bands varies, showing that they are associated with two different carriers. The new band at about 2880/cm falls near the position of C-H stretching vibrations in tertiary carbon atoms. The strength of this feature, in combination with the lack of strong features associated with primary and secondary carbon atoms, suggests that the carrier of the new feature has a diamondlike structure. This new feature is tentatively attributed to interstellar 'diamonds'. The detection of this band in the spectra of all four dense molecular clouds suggests that the carrier is ubiquitous in dense clouds.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences



More Article Retrieval Options

HELP for Article Retrieval


Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)


Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints