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Title: A STUDY OF RO-VIBRATIONAL OH EMISSION FROM HERBIG Ae/Be STARS

Abstract

We present a study of ro-vibrational OH and CO emission from 21 disks around Herbig Ae/Be stars. We find that the OH and CO luminosities are proportional over a wide range of stellar ultraviolet luminosities. The OH and CO line profiles are also similar, indicating that they arise from roughly the same radial region of the disk. The CO and OH emission are both correlated with the far-ultraviolet luminosity of the stars, while the polycyclic aromatic hydrocarbon (PAH) luminosity is correlated with the longer wavelength ultraviolet luminosity of the stars. Although disk flaring affects the PAH luminosity, it is not a factor in the luminosity of the OH and CO emission. These properties are consistent with models of UV-irradiated disk atmospheres. We also find that the transition disks in our sample, which have large optically thin inner regions, have lower OH and CO luminosities than non-transition disk sources with similar ultraviolet luminosities. This result, while tentative given the small sample size, is consistent with the interpretation that transition disks lack a gaseous disk close to the star.

Authors:
;  [1];  [2];  [3];  [4]
  1. Department of Physics and Astronomy, 118 Kinard Laboratory, Clemson University, Clemson, SC 29634-0978 (United States)
  2. National Optical Astronomy Observatory, 950 N. Cherry Ave., Tucson, AZ 85719 (United States)
  3. Naval Research Laboratory, Code 7211, Washington, DC 20375 (United States)
  4. Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States)
Publication Date:
OSTI Identifier:
22667318
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 830; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; AUGER ELECTRON SPECTROSCOPY; CARBON; CARBON MONOXIDE; EMISSION; FAR ULTRAVIOLET RADIATION; HYDROXIDES; IRRADIATION; LUMINOSITY; POLYCYCLIC AROMATIC HYDROCARBONS; PROTOPLANETS; STARS; STELLAR FLARES; WAVELENGTHS

Citation Formats

Brittain, Sean D., Reynolds, Nickalas, Najita, Joan R., Carr, John S., and Ádámkovics, Máté, E-mail: sbritt@clemson.edu. A STUDY OF RO-VIBRATIONAL OH EMISSION FROM HERBIG Ae/Be STARS. United States: N. p., 2016. Web. doi:10.3847/0004-637X/830/2/112.
Brittain, Sean D., Reynolds, Nickalas, Najita, Joan R., Carr, John S., & Ádámkovics, Máté, E-mail: sbritt@clemson.edu. A STUDY OF RO-VIBRATIONAL OH EMISSION FROM HERBIG Ae/Be STARS. United States. doi:10.3847/0004-637X/830/2/112.
Brittain, Sean D., Reynolds, Nickalas, Najita, Joan R., Carr, John S., and Ádámkovics, Máté, E-mail: sbritt@clemson.edu. Thu . "A STUDY OF RO-VIBRATIONAL OH EMISSION FROM HERBIG Ae/Be STARS". United States. doi:10.3847/0004-637X/830/2/112.
@article{osti_22667318,
title = {A STUDY OF RO-VIBRATIONAL OH EMISSION FROM HERBIG Ae/Be STARS},
author = {Brittain, Sean D. and Reynolds, Nickalas and Najita, Joan R. and Carr, John S. and Ádámkovics, Máté, E-mail: sbritt@clemson.edu},
abstractNote = {We present a study of ro-vibrational OH and CO emission from 21 disks around Herbig Ae/Be stars. We find that the OH and CO luminosities are proportional over a wide range of stellar ultraviolet luminosities. The OH and CO line profiles are also similar, indicating that they arise from roughly the same radial region of the disk. The CO and OH emission are both correlated with the far-ultraviolet luminosity of the stars, while the polycyclic aromatic hydrocarbon (PAH) luminosity is correlated with the longer wavelength ultraviolet luminosity of the stars. Although disk flaring affects the PAH luminosity, it is not a factor in the luminosity of the OH and CO emission. These properties are consistent with models of UV-irradiated disk atmospheres. We also find that the transition disks in our sample, which have large optically thin inner regions, have lower OH and CO luminosities than non-transition disk sources with similar ultraviolet luminosities. This result, while tentative given the small sample size, is consistent with the interpretation that transition disks lack a gaseous disk close to the star.},
doi = {10.3847/0004-637X/830/2/112},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 830,
place = {United States},
year = {2016},
month = {10}
}