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J/MNRAS/459/1415    Bright white dwarfs IRAC photometry          (Barber+, 2016)

Remnant planetary systems around bright white dwarfs. Barber S.D., Belardi C., Kilic M., Gianninas A. <Mon. Not. R. Astron. Soc., 459, 1415-1421 (2016)> =2016MNRAS.459.1415B (SIMBAD/NED BibCode)
ADC_Keywords: Stars, white dwarf ; Photometry, millimetric/submm Keywords: white dwarfs - infrared: planetary systems - infrared: stars Abstract: We cross-correlate several sources of archival photometry for 1265 bright (V∼16mag) white dwarfs (WDs) with available high signal-to-noise spectroscopy. We find 381 WDs with archival Spitzer+IRAC data and investigate this subsample for infrared excesses due to circumstellar dust. This large data set reveals 15 dusty WDs, including three new debris discs and the hottest WD known to host dust (WD 0010+280). We study the frequency of debris discs at WDs as function of mass. The frequency peaks at 12.5 per cent for 0.7-0.75M WDs (with 3M main-sequence star progenitors) and falls off for stars more massive than this, which mirrors predicted planet occurrence rates for stars of different masses. Description: Mid-infrared photometry, like the 3.4 and 4.6um photometry available from WISE, is necessary to detect emission from a debris disc orbiting a WD. WISE, however, has poor spatial resolution (6 arcsec beam size) and is known to have a 75 per cent false positive rate for detecting dusty discs around WDs fainter than 14.5(15) mag in W1(W2) (Barber et al. (2014ApJ...786...77B). To mitigate this high rate of spurious detections, we compile higher spatial resolution archival data from the InfraRed Array Camera (IRAC) on the Spitzer Space Telescope. We query the Spitzer Heritage Archive for any observations within 10 arcsec of the 1265 WDs from Gianninas et al. (2011, Cat. J/ApJ/743/138) and find 907 Astronomical Observing Requests (AORs) for 381 WDs. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 67 381 IRAC Ch 1-4 photometry
See also: J/ApJ/657/1013 : 2MASS/Spitzer white dwarfs IR photometry (Tremblay+, 2007) J/MNRAS/417/1210 : DA-white dwarfs from SDSS and UKIDSS (Girven+, 2011) J/ApJ/760/26 : DA white dwarfs infrared photometry (Barber+, 2012) J/AJ/146/34 : LAMOST DA white dwarfs infrared photometry (Zhang+, 2013) J/ApJ/743/138 : Bright white dwarfs spectroscopic survey (Gianninas+, 2011) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 10 A10 --- WD WD name (HHMM+DDd or HHMM+DDd.N) 12- 18 F7.3 mJy F3.6um ?=- Flux density at 3.6um 20- 24 F5.3 mJy e_F3.6um ?=- rms uncertainty on F3.6um 26- 32 F7.3 mJy F4.5um ?=- Flux density at 4.5um 34- 38 F5.3 mJy e_F4.5um ?=- rms uncertainty on F4.5um 40- 47 F8.3 mJy F5.8um ?=- Flux density at 5.8um 49- 53 F5.3 mJy e_F5.8um ?=- rms uncertainty on F5.8um 55- 61 F7.3 mJy F8.0um ?=- Flux density at 8.0um 63- 67 F5.3 mJy e_F8.0um ?=- rms uncertainty on F8.0um
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 28-Jul-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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