A Gaseous Metal Disk Around a White Dwarf

Gänsicke, B. T.; Marsh, T. R.; Southworth, J.; Rebassa‐Mansergas, A.

doi:10.1126/science.1135033

Cited by 356 publications

(465 citation statements)

References 24 publications

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“…Early in the Spitzer era, and prior to the publication of any satellite observations of white dwarf disks other than G29-38, Gänsicke et al (2006) announced the discovery 5 of strong gaseous emis- (Gänsicke et al, 2006). The data are shown as points with (small) error bars, while a dynamical, disk model for the emission is shown as a solid line.…”

Section: Gaseous Debris In Disksmentioning

confidence: 99%

Circumstellar debris and pollution at white dwarf stars

Farihi

2016

New Astronomy Reviews

291

265

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Circumstellar disks of planetary debris are now known or suspected to closely orbit hundreds of white dwarf stars. To date, both data and theory support disks that are entirely contained within the preceding giant stellar radii, and hence must have been produced during the white dwarf phase. This picture is strengthened by the signature of material falling onto the pristine stellar surfaces; disks are always detected together with atmospheric heavy elements. The physical link between this debris and the white dwarf host abundances enables unique insight into the bulk chemistry of extrasolar planetary systems via their remnants. This review summarizes the body of evidence supporting dynamically active planetary systems at a large fraction of all white dwarfs, the remnants of first generation, main-sequence planetary systems, and hence provide insight into initial conditions as well as long-term dynamics and evolution.

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Section: Gaseous Debris In Disksmentioning

confidence: 99%

Circumstellar debris and pollution at white dwarf stars

Farihi

2016

New Astronomy Reviews

291

265

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“…However, they also noted that they are only candidates for having a dust disk due to possible background contamination. some white dwarfs (Gänsicke et al 2006;Melis et al 2010;Brinkworth et al 2012;Debes et al 2012).…”

Section: Introductionmentioning

confidence: 99%

The Drop During Less Than 300 Days of a Dusty White Dwarf's Infrared Luminosity

Jura

2014

ApJ

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We report Spitzer/Infrared Array Camera photometry of WD J0959−0200, a white dwarf that displays excess infrared radiation from a disk, likely produced by a tidally disrupted planetesimal. We find that in 2010, the fluxes in both 3.6 μm and 4.5 μm decreased by ∼35% in less than 300 days. The drop in the infrared luminosity is likely due to an increase of the inner disk radius from one of two scenarios: (1) a recent planetesimal impact; (2) instability in the circumstellar disk. The current situation is tantalizing; high-sensitivity, high-cadence infrared studies will be a new tool to study the interplay between a disk and its host white dwarf star.

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“…Brinkworth et al 2012;Girven et al 2012;Farihi et al 2012Farihi et al , 2010bFarihi et al , 2009Jura et al 2007;von Hippel et al 2007;Kilic et al 2006); their properties are precisely as expected for material contained within the Roche limit of the star and feeding the stellar surface (Metzger et al 2012;Rafikov 2011;Bochkarev & Rafikov 2011). A fraction of these exhibit metallic, gaseous emission Melis et al 2012Melis et al , 2011Gänsicke et al 2008Gänsicke et al , 2007Gänsicke et al , 2006 that is spatially coincident with the particulate disks Melis et al 2010). …”

Section: Tidally-destroyed Planetesimalsmentioning

confidence: 75%

ALMA and Herschel observations of the prototype dusty and polluted white dwarf G29-38

Farihi

Wyatt

Greaves

et al. 2014

Monthly Notices of the Royal Astronomical Society

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ALMA Cycle 0 and Herschel 1 PACS observations are reported for the prototype, nearest, and brightest example of a dusty and polluted white dwarf, G29-38. These long wavelength programs attempted to detect an outlying, parent population of bodies at 1 − 100 AU, from which originates the disrupted planetesimal debris that is observed within 0.01 AU and which exhibits L IR /L * = 0.039. No associated emission sources were detected in any of the data down to L IR /L * ∼ 10 −4 , generally ruling out cold dust masses greater than 10 24 − 10 25 g for reasonable grain sizes and properties in orbital regions corresponding to evolved versions of both asteroid and Kuiper belt analogs. Overall, these null detections are consistent with models of long-term collisional evolution in planetesimal disks, and the source regions for the disrupted parent bodies at stars like G29-38 may only be salient in exceptional circumstances, such as a recent instability. A larger sample of polluted white dwarfs, targeted with the full ALMA array, has the potential to unambiguously identify the parent source(s) of their planetary debris.

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A Gaseous Metal Disk Around a White Dwarf

Cited by 356 publications

References 24 publications

Circumstellar debris and pollution at white dwarf stars

Circumstellar debris and pollution at white dwarf stars

The Drop During Less Than 300 Days of a Dusty White Dwarf's Infrared Luminosity

ALMA and Herschel observations of the prototype dusty and polluted white dwarf G29-38

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