The disappearing act: a dusty wind eclipsing RW Aur

The disappearing act: a dusty wind eclipsing RW Aur
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消失的一幕:一阵尘土飞扬的风席卷了RW Aur

DOI:
10.1093/mnras/stw2327
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发表时间:
2016
影响因子:
4.8
通讯作者:
Bozhinova I
Bozhinova I
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Bozhinova I

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RW Aur是一颗年轻的双星星星,在2010-2011年经历了一次深度变暗,在2014年夏天到2016年夏天经历了第二次更深的变暗。我们在2014-2016年日食期间提出了新的未解决的多波段测光,在变暗之前和期间的新发射线光谱,2014年和2015年之间的存档红外测光,以及文献数据的概述。光谱观测是用利物浦望远镜上的光纤馈电机器人双光束光谱仪进行的。光度监测是由拉斯坎布雷斯天文台全球望远镜网络和詹姆斯格雷戈里望远镜完成的。我们的测光显示,RW Aur在2016年3月的亮度下降到R = 12.5。除了长期的变暗趋势,RW Aur在短至数小时的时间尺度上是可变的。短期的变化很可能是由于不稳定的吸积流。这一点,加上光谱中与吸积相关的发射线的存在,表明在日食期间,双星系统中的吸积流至少部分可见。[Oi]的等效宽度在2014年增加了10倍,与调光事件相吻合,证实了以前的报告。Hα剖面的蓝移部分在日食期间被抑制。结合文献中报道的日食期间中红外亮度的增加和在WISE档案数据中看到的,以及RW Aur A周围圆盘几何形状的限制,我们得出结论,遮蔽屏幕是从内部圆盘发出的风的一部分。
RW Aur is a young binary star that experienced a deep dimming in 2010–2011 in component A and a second even deeper dimming from summer 2014 to summer 2016. We present new unresolved multiband photometry during the 2014–2016 eclipse, new emission line spectroscopy before and during the dimming, archive infrared photometry between 2014 and 2015, as well as an overview of literature data. Spectral observations were carried out with the Fibre-fed RObotic Dual-beam Optical Spectrograph on the Liverpool Telescope. Photometric monitoring was done with the Las Cumbres Observatory Global Telescope Network and James Gregory Telescope. Our photometry shows that RW Aur dropped in brightness toR= 12.5 in 2016 March. In addition to the long-term dimming trend, RW Aur is variable on time-scales as short as hours. The short-term variation is most likely due to an unstable accretion flow. This, combined with the presence of accretion-related emission lines in the spectra suggest that accretion flows in the binary system are at least partially visible during the eclipse. The equivalent width of [Oi] increases by a factor of 10 in 2014, coinciding with the dimming event, confirming previous reports. The blueshifted part of the Hα profile is suppressed during the eclipse. In combination with the increase in mid-infrared brightness during the eclipse reported in the literature and seen inWISEarchival data, and constraints on the geometry of the disc around RW Aur A we arrive at the conclusion that the obscuring screen is part of a wind emanating from the inner disc.
Chandra 解析 T TAURI 双星系统 RW AUR
DOI: --
发表时间: 2014
期刊:
影响因子: --
作者:
S. Skinner;M. Guedel
通讯作者: M. Guedel
DOI: 10.1051/0004-6361/201527237
发表时间: 2015-11
影响因子: 6.5
作者:
P. Schneider;H. M. Gunther;J. Robrade;S. Facchini;K. Hodapp;C. Manara;V. Perdelwitz;J. Schmitt;S. Skinner;S. Wolk
通讯作者: P. Schneider;H. M. Gunther;J. Robrade;S. Facchini;K. Hodapp;C. Manara;V. Perdelwitz;J. Schmitt;S. Skinner;S. Wolk
RW Aurigae 双极喷流的 HST/STIS 观测:绘制靠近源头的物理参数
DOI: --
发表时间: 2009
期刊:
影响因子: --
作者:
S. Melnikov;J. Eisloffel;F. Bacciotti;J. Woitas;T. Ray
通讯作者: T. Ray
RW Aur Jet 中的固有运动和速度不对称
DOI: --
发表时间: 2003
期刊:
影响因子: --
作者:
L. López;S. Cabrit;C. Dougados
通讯作者: C. Dougados
RW Aurigae 系统中的潮汐剥离和圆盘运动学
DOI: --
发表时间: 2006
期刊:
影响因子: --
作者:
S. Cabrit;J. Pety;N. Pesenti;C. Dougados
通讯作者: C. Dougados