DYNAMICAL PHENOMENA IN THE ATMOSPHERE OF THE PROTO-PLANETARY NEBULA IRAS 22272+5435

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27832

Title:	DYNAMICAL PHENOMENA IN THE ATMOSPHERE OF THE PROTO-PLANETARY NEBULA IRAS 22272+5435
Authors:	Zacs,L;Sperauskas,J;Musaev,FA;Smirnova,O;Yang,TC;Chen,WP;Schmidt,M
Contributors:	天文研究所
Keywords:	RV TAURI STARS;POST-AGB STARS;LONG-TERM;IRAS-22272+5435;SPECTROSCOPY;VARIABILITY;MASS
Date:	2009
Issue Date:	2010-06-29 19:34:32 (UTC+8)
Publisher:	中央大學
Abstract:	Radial velocity monitoring of the star HD 235858 confirmed regular variations with a peak-to-peak amplitude of about 10 km s(-1) and a period of about 131.2 days. The light, color, and velocity variations are typical for RV Tauri stars. Splitting of low-excitation atomic lines was detected. The components are both blue- and redshifted relative to the systemic velocity. Significant variations are observed in the intensity of C-2 and CN lines. Variable emission in the Ha profile, splitting of low-excitation atomic absorption lines, appearance of CN emission lines, blue wings of strong lines, and recent reddening give evidence of shocks and mass outflow obviously induced by atmospheric pulsations.
Relation:	ASTROPHYSICAL JOURNAL LETTERS
Appears in Collections:	[Graduate Institute of Astronomy] journal & Dissertation

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