NLTT 5306: the shortest period detached white dwarf+brown dwarf binary

Steele, P. R.; Saglia, R.; Burleigh, M. R.; Marsh, T. R.; Gänsicke, B. T.; Lawrie, Katherine; Cappetta, M.; Girven, J.; Napiwotzki, R.

doi:10.1093/mnras/sts620

Cited by 55 publications

(86 citation statements)

References 55 publications

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“…A planet-sized body is not supported by the fits and would, moreover, overfill its Roche lobe. WD + BD binaries are rare (Steele et al 2011) and only two such systems with comparable short orbital periods are known, WD0137+349B with 116 min period Burleigh et al 2006) and NLTT5306 with 101.88 min (Steele et al 2013), and both are not eclipsing. Other WD+BD binaries exist in the variety of cataclysmic variables, but their post-CE evolutionary history was probably different.…”

Section: Discussionmentioning

confidence: 99%

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The eclipsing post-common envelope binary CSS21055: a white dwarf with a probable brown-dwarf companion

Beuermann

Dreizler

Hessman

et al. 2013

A&A

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We report photometric observations of the eclipsing close binary CSS21055 (SDSS J141126+200911) that strongly suggest that the companion to the carbon-oxygen white dwarf is a brown dwarf with a mass between 0.030 and 0.074 M . The measured orbital period is 121.73 min and the totality of the eclipse lasts 125 s. If confirmed, CSS21055 would be the first detached eclipsing WD+BD binary. Spectroscopy in the eclipse could provide information about the companion's evolutionary state and atmospheric structure.

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Section: Discussionmentioning

confidence: 99%

“…asp with CSS 21055. These are NLTT5306 (Steele et al 2013) and WD0137-349 Burleigh et al 2006), which are not eclipsing.…”

Section: Introductionmentioning

confidence: 98%

The eclipsing post-common envelope binary CSS21055: a white dwarf with a probable brown-dwarf companion

Beuermann

Dreizler

Hessman

et al. 2013

A&A

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“…Such irradiation effects can be observed at wavelengths as short as the SDSS i -band (e.g. NLTT 5306; Steele et al 2012) but become more pronounced in the near-IR, as has been observed in WD 0137-359 (Burleigh et al 2013, in prep. ).…”

Section: Introductionmentioning

confidence: 71%

White dwarfs in the WTS: Eclipsing binaries

Steele

Saglia

Koppenhoefer

et al. 2013

EPJ Web of Conferences

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Abstract.We have identified photometric white dwarf candidates in the WFCAM transit survey through a reduced proper motion versus colour approach. Box-fitting with parameters adjusted to detect the unique signature of a white dwarf + planet/brown dwarf transit/eclipse event was performed, as well as looking for variability due to the irradiation of the companions atmosphere by the white dwarf's high UV flux. We have also performed a simple sensitivity analysis in order to assess the ability of the survey to detect companions to white dwarfs via the transit method.

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“…There are a handful of confirmed white dwarfbrown dwarf binaries in compact orbits which suggest that, despite engulfment, the brown-dwarf survives post-main sequence evolution relatively unscathed (Farihi & Christopher 2004;Maxted et al 2006;Casewell et al 2012;Steele et al 2013). The compact orbits lead to tidally synchronous orbits and significant differences between dayside and nightside brown-dwarf surface temperatures (Casewell et al 2015).…”

Section: Region Iii: High Tempertaure Small Radiusmentioning

confidence: 99%

WIRED for EC: New White Dwarfs with WISE Infrared Excesses and New Classification Schemes from the Edinburgh–Cape Blue Object Survey

Dennihy

Clemens

Debes

et al. 2017

ApJ

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We present a simple method for identifying candidate white dwarf systems with dusty exoplanetary debris based on a single temperature blackbody model fit to the infrared excess. We apply this technique to a sample of Southern Hemisphere white dwarfs from the recently completed Edinburgh-Cape Blue Object Survey and identify four new promising dusty debris disk candidates. We demonstrate the efficacy of our selection method by recovering three of the four Spitzer confirmed dusty debris disk systems in our sample. Further investigation using archival high resolution imaging shows Spitzer data of the un-recovered fourth object is likely contaminated by a line-of-sight object that either led to a mis-classification as a dusty disk in the literature or is confounding our method. Finally, in our diagnostic plot we show that dusty white dwarfs which also host gaseous debris lie along a boundary of our dusty debris disk region, providing clues to the origin and evolution of these especially interesting systems.

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NLTT 5306: the shortest period detached white dwarf+brown dwarf binary

Cited by 55 publications

References 55 publications

The eclipsing post-common envelope binary CSS21055: a white dwarf with a probable brown-dwarf companion

The eclipsing post-common envelope binary CSS21055: a white dwarf with a probable brown-dwarf companion

White dwarfs in the WTS: Eclipsing binaries

WIRED for EC: New White Dwarfs with WISE Infrared Excesses and New Classification Schemes from the Edinburgh–Cape Blue Object Survey

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