THE ELM SURVEY. V. MERGING MASSIVE WHITE DWARF BINARIES

被引：93

作者：

Brown, Warren R. ^{[1
]}

Kilic, Mukremin ^{[2
]}

Allende Prieto, Carlos ^{[3
,4
]}

Gianninas, A. ^{[2
]}

Kenyon, Scott J. ^{[1
]}

机构：

[1] Smithsonian Astrophys Observ, Cambridge, MA 02138 USA

[2] Univ Oklahoma, Homer L Dodge Dept Phys & Astron, Norman, OK 73019 USA

[3] Inst Astrofis Canarias, E-38205 Tenerife, Spain

[4] Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain

来源：

ASTROPHYSICAL JOURNAL | 2013年 / 769卷 / 01期

基金：

美国国家科学基金会;

关键词：

binaries: close; Galaxy: stellar content; stars: individual (SDSS J0751-0141; SDSS J0811+0225); stars: neutron; white dwarfs; HYPERVELOCITY STARS; THEORETICAL ISOCHRONES; PHOTOMETRIC SYSTEMS; PSR J1911-5958A; HYDROGEN-RICH; DATA RELEASE; DISCOVERY; HELIUM; MERGER; SDSS;

D O I：

10.1088/0004-637X/769/1/66

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the discovery of 17 low-mass white dwarfs (WDs) in short-period (P <= 1 day) binaries. Our sample includes four objects with remarkable log g similar or equal to 5 surface gravities and orbital solutions that require them to be double degenerate binaries. All of the lowest surface gravity WDs have metal lines in their spectra implying long gravitational settling times or ongoing accretion. Notably, six of the WDs in our sample have binary merger times < 10 Gyr. Four have greater than or similar to 0.9M(circle dot) companions. If the companions are massive WDs, these four binaries will evolve into stable mass transfer AM CVn systems and possibly explode as underluminous supernovae. If the companions are neutron stars, then these may be millisecond pulsar binaries. These discoveries increase the number of detached, double degenerate binaries in the ELM Survey to 54; 31 of these binaries will merge within a Hubble time.

引用

页数：11

共 73 条

[1] THE EIGHTH DATA RELEASE OF THE SLOAN DIGITAL SKY SURVEY: FIRST DATA FROM SDSS-III [J].

Aihara, Hiroaki ;

Allende Prieto, Carlos ;

An, Deokkeun ;

Anderson, Scott F. ;

Aubourg, Eric ;

Balbinot, Eduardo ;

Beers, Timothy C. ;

Berlind, Andreas A. ;

Bickerton, Steven J. ;

Bizyaev, Dmitry ;

Blanton, Michael R. ;

Bochanski, John J. ;

Bolton, Adam S. ;

Bovy, Jo ;

Brandt, W. N. ;

Brinkmann, J. ;

Brown, Peter J. ;

Brownstein, Joel R. ;

Busca, Nicolas G. ;

Campbell, Heather ;

Carr, Michael A. ;

Chen, Yanmei ;

Chiappini, Cristina ;

Comparat, Johan ;

Connolly, Natalia ;

Cortes, Marina ;

Croft, Rupert A. C. ;

Cuesta, Antonio J. ;

da Costa, Luiz N. ;

Davenport, James R. A. ;

Dawson, Kyle ;

Dhital, Saurav ;

Ealet, Anne ;

Ebelke, Garrett L. ;

Edmondson, Edward M. ;

Eisenstein, Daniel J. ;

Escoffier, Stephanie ;

Esposito, Massimiliano ;

Evans, Michael L. ;

Fan, Xiaohui ;

Femenia Castella, Bruno ;

Font-Ribera, Andreu ;

Frinchaboy, Peter M. ;

Ge, Jian ;

Gillespie, Bruce A. ;

Gilmore, G. ;

Gonzalez Hernandez, Jonay I. ;

Gott, J. Richard ;

Gould, Andrew ;

Grebel, Eva K. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2011, 193 (02)

[2] The masses of PSR J1911-5958A and its white dwarf companion [J].

Bassa, C. G. ;

van Kerkwijk, M. H. ;

Koester, D. ;

Verbunt, F. .

ASTRONOMY & ASTROPHYSICS, 2006, 456 (01) :295-U53

[3] 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

[4] Faint thermonuclear supernovae from AM Canum Venaticorum binaries [J].

Bildsten, Lars ;

Shen, Ken J. ;

Weinberg, Nevin N. ;

Nelemans, Gijs .

ASTROPHYSICAL JOURNAL, 2007, 662 (02) :L95-L98

[5]

Brown J. M., 2011, APJ, V729, P2

[6] Hypervelocity stars. III. The space density and ejection history of main-sequence stars from the galactic center [J].

Brown, Warren R. ;

Geller, Margaret J. ;

Kenyon, Scott J. ;

Kurtz, Michael J. ;

Bromley, Benjamin C. .

ASTROPHYSICAL JOURNAL, 2007, 671 (02) :1708-1716

[7] Hypervelocity stars. II. The bound population [J].

Brown, Warren R. ;

Geller, Margaret J. ;

Kenyon, Scott J. ;

Kurtz, Michael J. .

ASTROPHYSICAL JOURNAL, 2007, 660 (01) :311-318

[8] Hypervelocity stars. I. The spectroscopic survey [J].

Brown, Warren R. ;

Geller, Margaret J. ;

Kenyon, Scott J. ;

Kurtz, Michael J. .

ASTROPHYSICAL JOURNAL, 2006, 647 (01) :303-311

[9] MMT HYPERVELOCITY STAR SURVEY. II. FIVE NEW UNBOUND STARS [J].

Brown, Warren R. ;

Geller, Margaret J. ;

Kenyon, Scott J. .

ASTROPHYSICAL JOURNAL, 2012, 751 (01)

[10] THE ELM SURVEY. III. A SUCCESSFUL TARGETED SURVEY FOR EXTREMELY LOW MASS WHITE DWARFS [J].

Brown, Warren R. ;

Kilic, Mukremin ;

Allende Prieto, Carlos ;

Kenyon, Scott J. .

ASTROPHYSICAL JOURNAL, 2012, 744 (02)

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