Characterization of X-ray flare properties of AB Dor

被引:2
作者
Lalitha, S. [1 ,2 ]
机构
[1] Indian Inst Astrophys, 2 Block, Bangalore 560034, Karnataka, India
[2] Tata Inst Fundamental Res, Homi Bhabha Rd, Bombay 400005, Maharashtra, India
来源
SOLAR AND STELLAR FLARES AND THEIR EFFECTS ON PLANETS | 2016年 / 11卷 / S320期
关键词
Sun: activity; stars: flare; stars: coronae; stars: individual: AB Dor; X-rays: stars; SOLAR-FLARES;
D O I
10.1017/S1743921316002155
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The strong similarities between the flares observed on the Sun and in low mass stars has raised question regarding dynamo in these stars. Using the Sun as a prototype, one may be able to address this. In this paper, we present an analysis of 30 intense X-ray flares observed from AB Dor. These flares detected in XMM-Newton data show a rapid rise (500-3000 s) and a slow decay (1000-6000 s). Our studies suggest that the scaling law between the flare peak emission measure and the flare peak temperature for all the flares observed on AB Dor is very similar to the relationship followed by solar flares. Furthermore, we obtain the frequency distribution of flare energies which is a crucial diagnostic to calculate the overall energy residing in a flare. Our results of this study indicate that the large flare (10(33) <= E <= 10(34) erg) may not contribute to the heating of the corona.
引用
收藏
页码:155 / 160
页数:6
相关论文
共 13 条
  • [1] Arnaud KA, 1996, ASTR SOC P, V101, P17
  • [2] Scaling laws of solar and stellar flares
    Aschwanden, Markus J.
    Stern, Robert A.
    Guedel, Manuel
    [J]. ASTROPHYSICAL JOURNAL, 2008, 672 (01) : 659 - 673
  • [3] X-ray astronomy of stellar coronae
    Güdel, M
    [J]. ASTRONOMY AND ASTROPHYSICS REVIEW, 2004, 12 (2-3) : 71 - 237
  • [4] The size of AB Doradus A from VLTI/AMBER interferometry
    Guirado, J. C.
    Marcaide, J. M.
    Marti-Vidal, I.
    Le Bouquin, J-B
    Close, L. M.
    Cotton, W. D.
    Montalban, J.
    [J]. ASTRONOMY & ASTROPHYSICS, 2011, 533
  • [5] The solar neighborhood. X. New nearby stars in the southern sky and accurate photometric distance estimates for red dwarfs
    Henry, TJ
    Subasavage, JP
    Brown, MA
    Beaulieu, TD
    Jao, WC
    Hambly, NC
    [J]. ASTRONOMICAL JOURNAL, 2004, 128 (05) : 2460 - 2473
  • [6] SOLAR-FLARES, MICROFLARES, NANOFLARES, AND CORONAL HEATING
    HUDSON, HS
    [J]. SOLAR PHYSICS, 1991, 133 (02) : 357 - 369
  • [7] Kuerster M., 1994, A A, V289, p899K
  • [8] Lalitha S., 2013, A A A, V559A, p119L
  • [9] Lalitha S., 2013, A A, V560A, p69L
  • [10] SOLAR HARD X-RAY MICROFLARES
    LIN, RP
    SCHWARTZ, RA
    KANE, SR
    PELLING, RM
    HURLEY, KC
    [J]. ASTROPHYSICAL JOURNAL, 1984, 283 (01) : 421 - 425