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Title: ANALYSIS OF THE CN AND CH MOLECULAR BAND STRENGTHS IN STARS OF THE OPEN CLUSTER NGC 6791

Abstract

Low-resolution SDSS/SEGUE spectra have been used to study the behavior of the strengths of the CN and CH molecular bands in stars at different evolutionary stages of the open cluster NGC 6791. We find a significant spread in the strengths of the CN bands, more than twice that expected from the uncertainties, although the bimodalities observed in globular clusters are not clearly observed here. This behavior is observed not only among red clump objects but also in unevolved stars such as those in the main sequence and lower red giant branch. In contrast, not all of the stars studied show significant scatter in their CH strengths.

Authors:
 [1];  [2]
  1. Instituto de Astrofisica de Canarias, La Laguna E-3200, Tenerife (Spain)
  2. (Spain)
Publication Date:
OSTI Identifier:
22086521
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 758; 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; ASTRONOMY; ASTROPHYSICS; CARBON NITRIDES; CYANIDES; EMISSION SPECTRA; GALACTIC EVOLUTION; GALAXIES; GALAXY CLUSTERS; HYDROCARBONS; MAIN SEQUENCE STARS; RESOLUTION

Citation Formats

Carrera, R., E-mail: rcarrera@iac.es, and Departamento de Astrofisica, Universidad de La Laguna, La Laguna E-38205, Tenerife. ANALYSIS OF THE CN AND CH MOLECULAR BAND STRENGTHS IN STARS OF THE OPEN CLUSTER NGC 6791. United States: N. p., 2012. Web. doi:10.1088/0004-637X/758/2/110.
Carrera, R., E-mail: rcarrera@iac.es, & Departamento de Astrofisica, Universidad de La Laguna, La Laguna E-38205, Tenerife. ANALYSIS OF THE CN AND CH MOLECULAR BAND STRENGTHS IN STARS OF THE OPEN CLUSTER NGC 6791. United States. doi:10.1088/0004-637X/758/2/110.
Carrera, R., E-mail: rcarrera@iac.es, and Departamento de Astrofisica, Universidad de La Laguna, La Laguna E-38205, Tenerife. Sat . "ANALYSIS OF THE CN AND CH MOLECULAR BAND STRENGTHS IN STARS OF THE OPEN CLUSTER NGC 6791". United States. doi:10.1088/0004-637X/758/2/110.
@article{osti_22086521,
title = {ANALYSIS OF THE CN AND CH MOLECULAR BAND STRENGTHS IN STARS OF THE OPEN CLUSTER NGC 6791},
author = {Carrera, R., E-mail: rcarrera@iac.es and Departamento de Astrofisica, Universidad de La Laguna, La Laguna E-38205, Tenerife},
abstractNote = {Low-resolution SDSS/SEGUE spectra have been used to study the behavior of the strengths of the CN and CH molecular bands in stars at different evolutionary stages of the open cluster NGC 6791. We find a significant spread in the strengths of the CN bands, more than twice that expected from the uncertainties, although the bimodalities observed in globular clusters are not clearly observed here. This behavior is observed not only among red clump objects but also in unevolved stars such as those in the main sequence and lower red giant branch. In contrast, not all of the stars studied show significant scatter in their CH strengths.},
doi = {10.1088/0004-637X/758/2/110},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 758,
place = {United States},
year = {2012},
month = {10}
}