Discovery of the first white dwarf plus T dwarf binary system and the use of white dwarfs as age calibrators

被引：0

作者：

Day-Jones, A. C. ^{[1
,2
]}

Pinfield, D. J. ^{[2
]}

Ruiz, M. T. ^{[1
]}

Beaumont, H. ^{[2
]}

Gallardo, J. ^{[1
]}

Gianninas, A. ^{[3
]}

Bergeron, P. ^{[3
]}

Napiwotzki, R. ^{[2
]}

Jenkins, J. S. ^{[1
]}

Burningham, B. ^{[2
]}

Zhang, Z. H. ^{[2
]}

Jones, H. R. A.

Murray, D. ^{[2
]}

Catalan, S. ^{[2
]}

Gomes, J. ^{[2
]}

机构：

[1] Univ Chile, Camino Observ 1515, Santiago, Chile

[2] Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England

[3] Univ Montreal, Dept Phys, Montreal, PQ 6128, Canada

来源：

17TH EUROPEAN WHITE DWARF WORKSHOP | 2010年 / 1273卷

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

white dwarfs; brown dwarfs; binaries; BROWN DWARF; COMPANIONS; STARS;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the discovery of the first white dwarf + T dwarf binary system. Systems containing a white dwarf and a brown dwarf are rare but can be used to place constraints on the age of the binary, making them valuable benchmark systems. It is currently not possible to calculate brown dwarf ages from models alone and white dwarfs provide an opportunity to aid the calibration of these models. We describe our program to identify such benchmark binary systems in the latest releases of UKIDSS/SDSS and review the level of constraints currently provided by benchmark objects. Finally we describe the niche age space that white dwarf + brown dwarf binary systems can provide and look at how many more systems may be identified in future surveys, such as VISTA and WISE.

引用

页码：366 / 371

页数：6

共 31 条

[1] The limiting effects of dust in brown dwarf model atmospheres [J].

Allard, F ;

Hauschildt, PH ;

Alexander, DR ;

Tamanai, A ;

Schweitzer, A .

ASTROPHYSICAL JOURNAL, 2001, 556 (01) :357-372

[2] PHOTOMETRIC CALIBRATION OF HYDROGEN-RICH AND HELIUM-RICH WHITE-DWARF MODELS [J].

BERGERON, P ;

WESEMAEL, F ;

BEAUCHAMP, A .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1995, 107 (717) :1047-1054

[3] DISCOVERY OF 2 COOL MAGNETIC WHITE-DWARFS [J].

BERGERON, P ;

RUIZ, MT ;

LEGGETT, SK .

ASTROPHYSICAL JOURNAL, 1992, 400 (01) :315-320

[4] A near-infrared spectroscopic detection of the brown dwarf in the post common envelope binary WD 0137-349 [J].

Burleigh, M. R. ;

Hogan, E. ;

Dobbie, P. D. ;

Napiwotzki, R. ;

Maxted, P. F. L. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2006, 373 (01) :L55-L59

[5] Imaging planets around nearby white dwarfs [J].

Burleigh, MR ;

Clarke, FJ ;

Hodgkin, ST .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2002, 331 (04) :L41-L45

[6] 47 new T dwarfs from the UKIDSS Large Area Survey [J].

Burningham, Ben ;

Pinfield, D. J. ;

Lucas, P. W. ;

Leggett, S. K. ;

Deacon, N. R. ;

Tamura, M. ;

Tinney, C. G. ;

Lodieu, N. ;

Zhang, Z. H. ;

Huelamo, N. ;

Jones, H. R. A. ;

Murray, D. N. ;

Mortlock, D. J. ;

Patel, M. ;

Barrado y Navascues, D. ;

Zapatero Osorio, M. R. ;

Ishii, M. ;

Kuzuhara, M. ;

Smart, R. L. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2010, 406 (03) :1885-1906

[7] The initial-final mass relationship of white dwarfs revisited:: effect on the luminosity function and mass distribution [J].

Catalan, S. ;

Isern, J. ;

Garcia-Berro, E. ;

Ribas, I. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2008, 387 (04) :1693-1706

[8]

Clarke R.A., 2009, MNRAS, V402, P575

[9] Discovery of a widely separated ultracool dwarf-white dwarf binary [J].

Day-Jones, A. C. ;

Pinfield, D. J. ;

Napiwotzki, R. ;

Burningham, B. ;

Jenkins, J. S. ;

Jones, H. R. A. ;

Folkes, S. L. ;

Weights, D. J. ;

Clarke, J. R. A. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2008, 388 (02) :838-848

[10]

Day-Jones A.C., 2010, MNRAS IN PRESS

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