Increasing the census of ultracool dwarfs in wide binary and multiple systems using Dark Energy Survey DR1 and Gaia DR2 data
Increasing the census of ultracool dwarfs in wide binary and multiple systems using Dark Energy Survey DR1 and Gaia DR2 data
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使用暗能量勘测 DR1 和盖亚 DR2 数据增加宽二元系统和多系统中超冷矮星的普查
DOI:
10.1093/mnras/staa3118
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发表时间:
2020
影响因子:
4.8
通讯作者:
Dal Ponte M
中科院分区:
文献类型:
--
作者:
Dal Ponte M
We present the discovery of 255 binary and 6 multiple system candidates with wide (> 5 arcsec) separation composed by ultracool dwarfs (UCDs) companions to stars, plus nine double ultracool dwarf systems. These systems were selected based on common distance criteria. About 90 per cent of the total sample has proper motions available and 73 per cent of the systems also satisfy a common proper motion criterion. The sample of ultracool candidates was taken from the Dark Energy Survey (DES) and the candidate stellar primaries are from Gaia DR2 and DES data. We compute chance alignment probabilities in order to assess the physical nature of each pair. We find that 174 candidate pairs with Gaia DR2 primaries and 81 pairs with a DES star as a primary have chance alignment probabilities. Only nine candidate systems composed of two UCDs were identified. The sample of candidate multiple systems is made up of five triple systems and one quadruple system. The majority of the UCDs found in binaries and multiples are of early L type and the typical wide binary fraction over the L spectral types is. Our sample of candidate wide binaries with UCDs as secondaries constitutes a substantial increase over the known number of such systems, which are very useful to constrain the formation and evolution of UCDs.
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DOI:
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发表时间:
2001
期刊:
影响因子:
--
作者:
J. Wilson;J. Kirkpatrick;J. Gizis;M. Skrutskie;D. Monet;J. R. H. Cornell;Ipac;Umass;U. F. Station
通讯作者:
U. F. Station
DOI:
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发表时间:
2010
期刊:
影响因子:
--
作者:
R. Scholz
通讯作者:
R. Scholz
DOI:
10.1088/0004-637x/763/2/130
发表时间:
2012
期刊:
The Astrophysical Journal
影响因子:
--
作者:
S. Leggett;C. Morley;M. Marley;D. Saumon;J. Fortney;C. Visscher
通讯作者:
C. Visscher
DOI:
10.1088/0004-6256/150/2/57
发表时间:
2015
期刊:
The Astronomical Journal
影响因子:
--
作者:
S. Dhital;A. West;K. Stassun;K. Schluns;Angela P. Massey
通讯作者:
Angela P. Massey
DOI:
10.1086/321085
发表时间:
2001
期刊:
The Astronomical Journal
影响因子:
--
作者:
J. Kirkpatrick;C. Dahn;D. Monet;I. Reid;J. Gizis;J. Liebert;A. Burgasser
通讯作者:
A. Burgasser