Sign on

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 (189) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (6)
· Associated Articles
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Irradiation of accretion disks around young objects. I - Near-infrared CO bands
Authors:
Calvet, Nuria; Patino, Alberto; Magris, Gladis C.; D'Alessio, Paola
Affiliation:
AA(Centro de Investigaciones de Astronomia, Merida, Venezuela; Institut d'Estudis Catalans, Barcelona, Spain), AB(Centro de Investigaciones de Astronomia; Universidad de los Andes, Merida, Venezuela), AC(Centro de Investigaciones de Astronomia, Merida; Universidad Central de Venezuela, Caracas), AD(Universidad Nacional Autonoma de Mexico, Coyoacan, Mexico; Centro de Investigaciones de Astronomia, Merida, Venezuela)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 380, Oct. 20, 1991, p. 617-630. Research supported by Universidad de los Andes and Smithsonian Institution. (ApJ Homepage)
Publication Date:
10/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Accretion Disks, Carbon Monoxide, Near Infrared Radiation, Radiative Transfer, Stellar Atmospheres, A Stars, B Stars, Computational Astrophysics, Stellar Mass Accretion, Stellar Temperature, T Tauri Stars
DOI:
10.1086/170618
Bibliographic Code:
1991ApJ...380..617C

Abstract

The effect of irradiation by the central star on the atmospheres of optically thick physically thin accretion disks around young objects are approximated, assuming radiative equilibrium. Irradiation is found to increase the temperature in the atmosphere of a viscous accretion disk relative to the case when only the viscous flux goes through it. Its effect on the near-infrared spectrum of the star-disk configuration is to decrease the strength of the absorption in the CO bands or turn them into emission, depending on the irradiation rate and on the mass accretion rate. As the stellar effect temperature increases for a given mass accretion rate, the disk surface temperature increases and the CO bands turn into emission. Observed spectra of young objects such as T Tauri stars, FU Ori subjects, and Herbig Be/Ae stars are in qualitative agreement with those predicted using the corresponding stellar parameters and disk mass accretion rates. It is inferred that the near-infrared CO bands can be used as indicators of the rate of mass accretion in the disk around young objects.

Associated Articles

Part  1     Part  2    


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)

  New!

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