Characterizing HR 3549 B using SPHERE
Characterizing HR 3549 B using SPHERE
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使用 SPHERE 表征 HR 3549 B
DOI：
10.1051/0004-6361/201628740
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发表时间：
2016
影响因子：
6.5
通讯作者：
A. Zurlo
中科院分区：
文献类型：
--
作者：
D. Mesa;A. Vigan;V. D’Orazi;C. Ginski;S. Desidera;M. Bonnefoy;R. Gratton;M. Langlois;F.Marzari;S. Messina;J. Antichi;B. Biller;M. Bonavita;E. Cascone;G. Chauvin;R. Claudi;I. Curtis;D. Fantinel;M. Feldt;A. Garufi;R. Galicher;T. Henning;S. Incorvaia;A. Lagrange;M. Millward;C. Perrot;B. Salasnich;S. Scuderi;E. Sissa;Z. Wahhaj;A. Zurlo
目标。在这项工作中，我们描述了AO场星HR 3549的低质量伴星。方法：研究方法。在成像模式下，我们用球体的近红外分支(IFS和IRDIS)在VLT观察到了HR3549B，在YJ模式下观察到了近红外分支，在H波段观测到了IRDIS。我们还用IRDIS长缝光谱模式获得了一个中等分辨率的光谱。使用专门为该仪器设计的SPHERE GTO管道减少了数据。我们使用了PCA和TLOCI等算法来抑制斑点噪声。结果。在IRDIS和IF上都可以清楚地看到同伴。我们得到了四个不同波段的光度和伴星的天文位置。根据我们的天体测量学，我们确认它是一个被束缚的物体，并在其轨道上设置约束。尽管仍然存在一些不确定因素，但我们估计这个系统的年龄类似于100-150Myr，产生40-50M-JUP和T-Eff 2300-2400K的伴星最可能的质量，与模板光谱相比，这指向伴星的M9和L0之间的光谱类型，与它在颜色-星等图上的位置相称。
Aims. In this work, we characterize the low-mass companion of the AO field star HR 3549. Methods. We observed HR 3549B in imaging mode with the near-infrared branch (IFS and IRDIS) of SPHERE at the VLT, with IFS in YJ mode and IRDIS in the H band. We also acquired a medium-resolution spectrum with the IRDIS long-slit spectroscopy mode. The data were reduced using the dedicated SPHERE GTO pipeline, which is custom-designed for this instrument. We employed algorithms such as PCA and TLOCI to reduce the speckle noise. Results. The companion was clearly visible with both IRDIS and IFS. We obtained photometry in four different bands and also the astrometric position for the companion. Based on our astrometry, we confirm that it is a bound object and set constraints on its orbit. Although several uncertainties still remain, we estimate an age of similar to 100-150 Myr for this system, yielding a most probable mass for the companion of 40-50 M-Jup and T-eff 2300-2400 K. Compared with template spectra, this points to a spectral type between M9 and L0 for the companion, commensurate with its position on the color-magnitude diagram.
双子座 NICI 行星搜寻活动：发现年轻碎片盘恒星 PZ Tel 的近恒星伴星
DOI：
10.1088/2041-8205/720/1/l82
发表时间：
2010
期刊：
The Astrophysical Journal
影响因子：
--
作者：
Biller B
通讯作者：
Biller B