The Astrophysical Journal

The Astrophysical Journal

Quick search Find article
Quick search
Find article
The Astrophysical Journal Volume 684 Number 2 Create an alert RSS this journal

David Yong et al. 2008 ApJ 684 1159 doi:10.1086/590658

Nitrogen Abundances in Giant Stars of the Globular Cluster NGC 6752*

FREE ISSUE

David Yong1, Frank Grundahl2, Jennifer A. Johnson3 and Martin Asplund4

Show affiliations

Tag this article Full text PDF (1.85 MB) HTML with Enhancements

Abstract References Cited By
We present N abundances for 21 bright giants in the globular cluster NGC 6752 based on high-resolution UVES spectra of the 3360 Å NH lines. We confirm that the Strömgren c1 index traces the N abundance and find that the star-to-star N abundance variation is 1.95 dex, at the sample's luminosity. We find statistically significant correlations, but small-amplitude variations, between the abundances of N and α-, Fe-peak, and s-process elements. Analyses using model atmospheres with appropriate N, O, Na, and Al abundances would strengthen, rather than mute, these correlations. If the small variations of heavy elements are real, then the synthesis of the N anomalies must take place in stars which also synthesize α-, Fe-peak, and s-process elements. These correlations offer support for contributions from both asymptotic giant branch and massive stars to the globular cluster abundance anomalies.

Footnote
*  Based on observations made with ESO Telescopes at the Paranal Observatories under program 65.L-0165(A).
Subject headings

Galaxy: abundances; globular clusters: individual (NGC 6752); stars: abundances


Dates

Issue 2 (2008 September 10)

Received 2008 April 16, accepted for publication 2008 May 30



Your last 10 viewed
  1. Nitrogen Abundances in Giant Stars of the Globular Cluster NGC 6752

    David Yong et al. 2008 ApJ 684 1159

  2. Infrared Spectroscopy of Symbiotic Stars. I. Orbits for Well-Known S-Type Systems

    Francis C. Fekel et al. 2000 The Astronomical Journal 119 1375

  3. Discontinuity of the chemical potential in reduced-density-matrix-functional theory

    N. Helbig et al 2007 EPL 77 67003

  4. A Self-Consistent Optical, Ultraviolet, and Extreme-Ultraviolet Model for the Spectrum of the Hot White Dwarf G191-B2B

    T. Lanz et al. 1996 ApJ 473 1089

  5. Investigation of a Color-Color Method to Determine Temperatures along Coronal Structures Using TRACE Data

    J. B. Noglik and R. W. Walsh 2007 ApJ 655 1127

  6. The Evolution of Stellar Mass in Galaxies in the NICMOS Ultra Deep Field

    S. D. J. Gwyn and F. D. A. Hartwick 2005 The Astronomical Journal 130 1337

  7. Exchange bias in granular CoO layers due to random magnetic anisotropy

    M. Gruyters 2007 EPL 77 57006

  8. Elemental Abundances in Five Stars in M54, A Globular Cluster Associated with the Sagittarius Galaxy

    Jeffery A. Brown et al. 1999 The Astronomical Journal 118 1245

  9. Ion Cyclotron Waves in the Solar Wind Observed by STEREO Near 1 AU

    Lan K. Jian et al 2009 ApJ 701 L105

  10. Discovery of a Metal-Line Absorber Associated with a Local Dwarf Starburst Galaxy

    Brian A. Keeney et al. 2006 The Astronomical Journal 132 2496

Users also read

What's this?
This innovative new feature generates a list of articles 'also read' by other users based on them reading the original article. Article abstracts citations and references are all considered and weighted accordingly. We hope that this will help you find relevant papers for your research.

  1. Multiple Stellar Populations in the Galactic Globular Cluster NGC 6752
  2. A Large C+N+O Abundance Spread in Giant Stars of the Globular Cluster NGC 1851

Share

View by subject




Export








Please login to access our web services, or create an account if you don't yet have one.

You must have cookies enabled in your web browser to be able to login.

Username
Password

Forgotten your password? Get a new one here.