THE SLOAN DIGITAL SKY SURVEY DATA RELEASE 7 SPECTROSCOPIC M DWARF CATALOG. III. THE SPATIAL DEPENDENCE OF MAGNETIC ACTIVITY IN THE GALAXY
Abstract
We analyze the magnetic activity of 59,318 M dwarfs from the Sloan Digital Sky Survey Data Release 7. This analysis explores the spatial distribution of M dwarf activity as a function of both vertical distance from the Galactic plane (Z) and planar distance from the Galactic center (R). We confirm the established trends of decreasing magnetic activity (as measured by H{alpha} emission) with increasing distance from the mid-plane of the disk and find evidence of a trend in Galactocentric radii. We measure a non-zero radial gradient in the activity fraction in our analysis of stars with spectral types dM3 and dM4. The activity fraction increases with R and can be explained by a decreasing mean stellar age with increasing distance from the Galactic center.
- Authors:
-
- Department of Astronomy, California Institute of Technology, 1200 E. California Avenue, Pasadena, CA 91125 (United States)
- Department of Astronomy, Boston University, 725 Commonwealth Avenue, Boston, MA 02215 (United States)
- Department of Physics and Astronomy, Haverford College, 370 Lancaster Avenue, Haverford, PA 19041 (United States)
- Publication Date:
- OSTI Identifier:
- 22136598
- Resource Type:
- Journal Article
- Journal Name:
- Astronomical Journal (New York, N.Y. Online)
- Additional Journal Information:
- Journal Volume: 146; Journal Issue: 3; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1538-3881
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BALMER LINES; CATALOGS; DISTANCE; GALAXIES; GEOPHYSICAL SURVEYS; SPACE DEPENDENCE; SPATIAL DISTRIBUTION; STARS
Citation Formats
Sebastian Pineda, J., West, Andrew A., Bochanski, John J., and Burgasser, Adam J., E-mail: jspineda@astro.caltech.edu. THE SLOAN DIGITAL SKY SURVEY DATA RELEASE 7 SPECTROSCOPIC M DWARF CATALOG. III. THE SPATIAL DEPENDENCE OF MAGNETIC ACTIVITY IN THE GALAXY. United States: N. p., 2013.
Web. doi:10.1088/0004-6256/146/3/50.
Sebastian Pineda, J., West, Andrew A., Bochanski, John J., & Burgasser, Adam J., E-mail: jspineda@astro.caltech.edu. THE SLOAN DIGITAL SKY SURVEY DATA RELEASE 7 SPECTROSCOPIC M DWARF CATALOG. III. THE SPATIAL DEPENDENCE OF MAGNETIC ACTIVITY IN THE GALAXY. United States. https://doi.org/10.1088/0004-6256/146/3/50
Sebastian Pineda, J., West, Andrew A., Bochanski, John J., and Burgasser, Adam J., E-mail: jspineda@astro.caltech.edu. 2013.
"THE SLOAN DIGITAL SKY SURVEY DATA RELEASE 7 SPECTROSCOPIC M DWARF CATALOG. III. THE SPATIAL DEPENDENCE OF MAGNETIC ACTIVITY IN THE GALAXY". United States. https://doi.org/10.1088/0004-6256/146/3/50.
@article{osti_22136598,
title = {THE SLOAN DIGITAL SKY SURVEY DATA RELEASE 7 SPECTROSCOPIC M DWARF CATALOG. III. THE SPATIAL DEPENDENCE OF MAGNETIC ACTIVITY IN THE GALAXY},
author = {Sebastian Pineda, J. and West, Andrew A. and Bochanski, John J. and Burgasser, Adam J., E-mail: jspineda@astro.caltech.edu},
abstractNote = {We analyze the magnetic activity of 59,318 M dwarfs from the Sloan Digital Sky Survey Data Release 7. This analysis explores the spatial distribution of M dwarf activity as a function of both vertical distance from the Galactic plane (Z) and planar distance from the Galactic center (R). We confirm the established trends of decreasing magnetic activity (as measured by H{alpha} emission) with increasing distance from the mid-plane of the disk and find evidence of a trend in Galactocentric radii. We measure a non-zero radial gradient in the activity fraction in our analysis of stars with spectral types dM3 and dM4. The activity fraction increases with R and can be explained by a decreasing mean stellar age with increasing distance from the Galactic center.},
doi = {10.1088/0004-6256/146/3/50},
url = {https://www.osti.gov/biblio/22136598},
journal = {Astronomical Journal (New York, N.Y. Online)},
issn = {1538-3881},
number = 3,
volume = 146,
place = {United States},
year = {Sun Sep 15 00:00:00 EDT 2013},
month = {Sun Sep 15 00:00:00 EDT 2013}
}