Skip to main content Accessibility help
×
Home
Hostname: page-component-747cfc64b6-65n5b Total loading time: 0.217 Render date: 2021-06-16T15:41:05.865Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": true, "newCiteModal": false, "newCitedByModal": true, "newEcommerce": true }

Anomalously Broad Diffuse Interstellar Bands and Excited CH+ Absorption in the Spectrum of Herschel 36

Published online by Cambridge University Press:  21 February 2014

D. G. York
Affiliation:
University of Chicago, Astronomy & Astrophysics Center, 5640 S. Ellis Ave., Chicago, IL 60637, USA The Enrico Fermi Institute, The University of Chicago, 5640 S. Ellis Ave., Chicago, IL 60637, USA
J. Dahlstrom
Affiliation:
Carthage College, 2001 Alford Park Dr., Kenosha, WI 53140, USA
D. E. Welty
Affiliation:
University of Chicago, Astronomy & Astrophysics Center, 5640 S. Ellis Ave., Chicago, IL 60637, USA
T. Oka
Affiliation:
University of Chicago, Astronomy & Astrophysics Center, 5640 S. Ellis Ave., Chicago, IL 60637, USA The Enrico Fermi Institute, The University of Chicago, 5640 S. Ellis Ave., Chicago, IL 60637, USA University of Chicago, Dept. of Chemistry, 5735 S. Ellis Ave., Chicago, IL 60637, USA
L. M. Hobbs
Affiliation:
University of Chicago, Astronomy & Astrophysics Center, 5640 S. Ellis Ave., Chicago, IL 60637, USA
S. Johnson
Affiliation:
University of Chicago, Astronomy & Astrophysics Center, 5640 S. Ellis Ave., Chicago, IL 60637, USA
S. D. Friedman
Affiliation:
Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218, USA
Z. Jiang
Affiliation:
University of Chicago, Astronomy & Astrophysics Center, 5640 S. Ellis Ave., Chicago, IL 60637, USA
B. L. Rachford
Affiliation:
Embry-Riddle Aeronautical University, Dept. of Physics, 3700 Willow Creek Rd., Prescott, AZ 863011, USA
T. P. Snow
Affiliation:
The University of Colorado, CASACampus Box 389, Boulder, CO 80309, USA
R. Sherman
Affiliation:
University of Chicago, Astronomy & Astrophysics Center, 5640 S. Ellis Ave., Chicago, IL 60637, USA
P. Sonnentrucker
Affiliation:
Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218, USA
Rights & Permissions[Opens in a new window]

Abstract

Anomalously broad diffuse interstellar bands (DIBs) at 5780.5, 5797.1, 6196.0, and 6613.6 Å are found in absorption along the line of sight to Herschel 36, an O star system next to the bright Hourglass nebula of the Hii region Messier 8. Excited lines of CH and CH+ are seen as well. We show that the region is very compact and itemize other anomalies of the gas. An infrared-bright star within 400 AU is noted. The combination of these effects produces anomalous DIBs, interpreted by Oka et al. (2013, see also this volume) as being caused predominantly by infrared pumping of rotational levels of relatively small molecules.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2014 

References

Arias, J. I., Barbá, R. H., Gamen, R. C., et al. 2010, ApJ Lett. 710, L30CrossRefGoogle Scholar
Cox, N. L. J., Ehrenfreund, P., Foing, B. H., et al. 2011, A&A 531, A25Google Scholar
Dahlstrom, J., York, D. G., Welty, D. E., et al. 2013, ApJ 773, 41CrossRefGoogle Scholar
Friedman, S. D., York, D. G., McCall, B. J., et al. 2011, ApJ 727, 33CrossRefGoogle Scholar
Geballe, T. R., Najarro, F., Figer, D. F., Schlegelmilch, B. W., & de La Fuente, D. 2011, Nat 479, 200CrossRefGoogle Scholar
Goto, M., Stecklum, B., Linz, H., et al. 2006, ApJ 649, 299CrossRefGoogle Scholar
Hecht, J., Helfer, H. L., Wolf, J., Pipher, J. L., & Donn, B. 1982, ApJ Lett. 263, L39CrossRefGoogle Scholar
Heger, M. L. 1922, Lick Observatory Bulletin 10, 146Google Scholar
Herbig, G. H. 1993, ApJ 407, 142CrossRefGoogle Scholar
Herschel, J. F. W. Sir 1847, Results of astronomical observations made during the years 1834, 5, 6, 7, 8, at the Cape of Good Hope; being the completion of a telescopic survey of the whole surface of the visible heavens, commenced in 1825. London, Smith, Elder and co., 1847.Google Scholar
Hobbs, L. M., York, D. G., Snow, T. P., et al. 2008, ApJ 680, 1256CrossRefGoogle Scholar
Hobbs, L. M., York, D. G., Thorburn, J. A., et al. 2009, ApJ 705, 32CrossRefGoogle Scholar
Kaufer, A., Stahl, O., Tubbesing, S., et al. 1999, The Messenger 95, 8Google Scholar
Meyer, D. M., Lauroesch, J. T., Sofia, U. J., Draine, B. T., & Bertoldi, F. 2001, ApJ Lett. 553, L59CrossRefGoogle Scholar
Motylewski, T., Linnartz, H., Vaizert, O., et al. 2000, ApJ 531, 312CrossRefGoogle Scholar
Oka, T., Welty, D. E., Johnson, S., et al. 2013, ApJ 773, 42CrossRefGoogle Scholar
Riegel, K. W. & Crutcher, R. M. 1972, A&A 18, 55Google Scholar
Snow, T. P. & McCall, B. J. 2006, ARA&A 44, 367CrossRefGoogle Scholar
Thackeray, A. D. 1950 110, 343Google Scholar
Thorburn, J. A., Hobbs, L. M., McCall, B. J., et al. 2003, ApJ 584, 339CrossRefGoogle Scholar
Walker, M. F. 1957, ApJ 125, 636CrossRefGoogle Scholar
Wang, S., Hildebrand, R. H., Hobbs, L. M., et al. 2003, In: Iye, M., Moorwood, A. F. M. (eds.), Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, vol. 4841, pp. 1145–1156Google Scholar
Zsargó, J. & Federman, S. R. 2003, ApJ 589, 319CrossRefGoogle Scholar
You have Access
1
Cited by

Send article to Kindle

To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Anomalously Broad Diffuse Interstellar Bands and Excited CH+ Absorption in the Spectrum of Herschel 36
Available formats
×

Send article to Dropbox

To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

Anomalously Broad Diffuse Interstellar Bands and Excited CH+ Absorption in the Spectrum of Herschel 36
Available formats
×

Send article to Google Drive

To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

Anomalously Broad Diffuse Interstellar Bands and Excited CH+ Absorption in the Spectrum of Herschel 36
Available formats
×
×

Reply to: Submit a response

Please enter your response.

Your details

Please enter a valid email address.

Conflicting interests

Do you have any conflicting interests? *