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Title: SPECTROSCOPIC MODELING OF THE ALGOL-TYPE STAR TW DRACONIS

Abstract

TW Dra is a well-known short-period Algol-type system. It belongs to the class of oEA stars (Algol-type systems with a {delta} Scuti-like oscillating primary component). We investigate the TW Dra system based on high-resolution spectra taken in 2007 and in 2008 to derive precise stellar and system parameters and to check for phases of active mass transfer. We derived a precise orbital solution and the extracted spectra of the stellar components of the TW Dra system. The analysis of the spectrum of the primary shows that it is a normal A5-type star with a chemical composition close to solar. By means of the Shellspec07{sub i}nverse program we calculated precise stellar and system parameters from the composite spectra. All results agree with those from the most recent photometric study. During both epochs of observations, the system can be well modeled without counting for mass transfer effects, assuming a spherical configuration of the primary and a Roche-lobe filling secondary. Thus, we conclude that the star was in quiet phases during both epochs of observations.

Authors:
;  [1];  [2]
  1. Thueringer Landessternwarte (TLS), D-7778 Tautenburg (Germany)
  2. Crimean Astrophysical Observatory, Nauchny, Crimea, 98409 (Ukraine)
Publication Date:
OSTI Identifier:
21301231
Resource Type:
Journal Article
Journal Name:
Astronomical Journal (New York, N.Y. Online)
Additional Journal Information:
Journal Volume: 139; Journal Issue: 4; Other Information: DOI: 10.1088/0004-6256/139/4/1327; 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; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; CHEMICAL COMPOSITION; MASS TRANSFER; ROCHE EQUIPOTENTIALS; SIMULATION; SPECTRA; SPHERICAL CONFIGURATION; STARS

Citation Formats

Tkachenko, A, Lehmann, H, and Mkrtichian, D. SPECTROSCOPIC MODELING OF THE ALGOL-TYPE STAR TW DRACONIS. United States: N. p., 2010. Web. doi:10.1088/0004-6256/139/4/1327; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).
Tkachenko, A, Lehmann, H, & Mkrtichian, D. SPECTROSCOPIC MODELING OF THE ALGOL-TYPE STAR TW DRACONIS. United States. https://doi.org/10.1088/0004-6256/139/4/1327; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)
Tkachenko, A, Lehmann, H, and Mkrtichian, D. 2010. "SPECTROSCOPIC MODELING OF THE ALGOL-TYPE STAR TW DRACONIS". United States. https://doi.org/10.1088/0004-6256/139/4/1327; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).
@article{osti_21301231,
title = {SPECTROSCOPIC MODELING OF THE ALGOL-TYPE STAR TW DRACONIS},
author = {Tkachenko, A and Lehmann, H and Mkrtichian, D},
abstractNote = {TW Dra is a well-known short-period Algol-type system. It belongs to the class of oEA stars (Algol-type systems with a {delta} Scuti-like oscillating primary component). We investigate the TW Dra system based on high-resolution spectra taken in 2007 and in 2008 to derive precise stellar and system parameters and to check for phases of active mass transfer. We derived a precise orbital solution and the extracted spectra of the stellar components of the TW Dra system. The analysis of the spectrum of the primary shows that it is a normal A5-type star with a chemical composition close to solar. By means of the Shellspec07{sub i}nverse program we calculated precise stellar and system parameters from the composite spectra. All results agree with those from the most recent photometric study. During both epochs of observations, the system can be well modeled without counting for mass transfer effects, assuming a spherical configuration of the primary and a Roche-lobe filling secondary. Thus, we conclude that the star was in quiet phases during both epochs of observations.},
doi = {10.1088/0004-6256/139/4/1327; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)},
url = {https://www.osti.gov/biblio/21301231}, journal = {Astronomical Journal (New York, N.Y. Online)},
issn = {1538-3881},
number = 4,
volume = 139,
place = {United States},
year = {Thu Apr 15 00:00:00 EDT 2010},
month = {Thu Apr 15 00:00:00 EDT 2010}
}