THE GEMINI SPECTRAL LIBRARY OF NEAR-IR LATE-TYPE STELLAR TEMPLATES AND ITS APPLICATION FOR VELOCITY DISPERSION MEASUREMENTS

Autor: Thaisa Storchi-Bergmann, Claudia Winge, Rogemar A. Riffel
Rok vydání: 2009
Předmět:
Stellar kinematics
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Instrumentation
FOS: Physical sciences
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
spectroscopic [Techniques]
Astronomia infravermelha
Astrophysics::Solar and Stellar Astrophysics
miscellaneous [Astronomical data bases]
Spectral resolution
data analysis [Methods]
Instrumentation and Methods for Astrophysics (astro-ph.IM)
Astrophysics::Galaxy Astrophysics
Physics
Supermassive black hole
Resolution (electron density)
Velocity dispersion
Astronomy and Astrophysics
Espectros estelares
Galaxy
Galáxias ativas
Buracos negros
Stars
Space and Planetary Science
late-type [Stars]
Astrophysics::Earth and Planetary Astrophysics
Astrophysics - Instrumentation and Methods for Astrophysics
Astrophysics - Cosmology and Nongalactic Astrophysics
Zdroj: Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
ISSN: 1538-4365
0067-0049
Popis: We present a spectroscopic library of late spectral type stellar templates in the near-IR range 2.15-2.42microns, at R=5300-5900 resolution, oriented to support stellar kinematics studies in external galaxies, such as the direct determination of the masses of supermassive black-holes in nearby active (or non-active) galaxies. The combination of high spectral resolution and state-of-the-art instrumentation available in 8-m class telescopes has made the analysis of circumnuclear stellar kinematics using the near-IR CO band heads one of the most used techniques for such studies, and this library aims to provide the supporting datasets required by the higher spectral resolution and larger spectral coverage currently achieved with modern near-IR spectrographs. Examples of the application for kinematical analysis are given for data obtained with two Gemini instruments, but the templates can be easily adjusted for use with other near-IR spectrographs at similar or lower resolution. The example datasets are also used to revisit the "template mismatch" effect and the dependence of the velocity dispersion values obtained from the fitting process with the characteristics of the stellar templates. The library is available in electronic form from the Gemini web pages (link above).
Comment: To appear in the ApJ Supplement Series, December 2009. AASTex, 25 pages, 17 figures. The library spectra are available in standard FITS format from the Gemini Observatory webpage at http://www.gemini.edu/sciops/instruments/nearir-resources/?q=node/10167
Databáze: OpenAIRE
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