A multiwavelength view of a classical T Tauri star CV Cha

被引：1

作者：

Pandey, Jeewan Chandra ^{[1
]}

Karmakar, Subhajeet ^{[1
]}

Joshi, Arti ^{[1
]}

Sharma, Saurabh ^{[1
]}

Pandey, Shashi Bhushan ^{[1
]}

Pandey, Anil Kumar ^{[1
]}

机构：

[1] Aryabhatta Res Inst Observat Sci ARIES, Naini Tal 263002, India

来源：

RESEARCH IN ASTRONOMY AND ASTROPHYSICS | 2019年 / 19卷 / 01期

关键词：

stars: activity; stars: individual (CV Cha); stars: pre-main sequence; stars: variable: T Tauri; X-ray: stars; 2-DIMENSIONAL RADIATIVE-TRANSFER; SPECTRAL ENERGY-DISTRIBUTIONS; YOUNG STELLAR OBJECTS; PHOTON IMAGING CAMERA; TIME-SERIES ANALYSIS; MAIN-SEQUENCE STARS; X-RAY; PROTOSTELLAR ENVELOPES; ACCRETION SHOCK; XMM-NEWTON;

D O I：

10.1088/1674-4527/19/1/7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using long-term optical, ultraviolet (UV) and X-ray data, we present a study of a classical T Tauri star CV Cha. The V-band light curve obtained from the All Sky Automated Survey (ASAS) shows short as well as long-term variability. The short-term variability could be due to rotational modulation of CV Cha. We derive the rotational period of 3.714 +/- 0.001 d for CV Cha. UV light curves obtained from Swift also show the variations. X-ray light curves from XMM-Newton and Swift do not show any significant short as well as long-term variability. However, the light curve from Chandra appears to be variable, which could be due to the emergence of flaring activities. X-ray spectra from all observations are explained well by the single temperature plasma of 0.95 keV with X-ray luminosity of 10(30.4)erg s(-1) in the 0.5-7.5 keV energy band. It appears that variability in optical and UV bands could be due to the presence of both hot and cool spots on the surface, while X-ray emission is dominated by magnetic processes.

引用

页数：12

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