J/ApJ/700/L73 Photospheric fluxes at 24 and 70µm (Kospal+, 2009)
On the relationship between debris disks and planets.
Kospal A., Ardila D.R., Moor A., Abraham P.
<Astrophys. J. 700, L73 (2009)>
=2009ApJ...700L..73K 2009ApJ...700L..73K
ADC_Keywords: Stars, nearby ; Stars, ages ; Photometry, infrared
Keywords: circumstellar matter - infrared: stars - Kuiper Belt -
planetary systems
Abstract:
Dust in debris disks is generated by collisions among planetesimals.
The existence of these planetesimals is a consequence of the
planet-formation process, but the relationship between debris disks
and planets has not been clearly established. Here we analyze
Spitzer/MIPS 24 and 70um data for 150 planet-bearing stars, and
compare the incidence of debris disks around these stars with a sample
of 118 stars around which planets have been searched for, but not
found. Together they comprise the largest sample ever assembled to
deal with this question. The use of survival analysis techniques
allows us to account for the large number of non-detections at 70um.
We discovered 10 new debris disks around stars with planets and one
around a star without known planets. We found that the incidence of
debris disks is marginally higher among stars with planets, than among
those without, and that the brightness of the average debris disk is
not significantly different in the two samples. We conclude that the
presence of a planet that has been detected via current radial
velocity techniques is not a good predictor for the presence of a
debris disk detected at infrared wavelengths.
Description:
In this table we present ages, metallicities, photospheric flux
predictions at 24 and 70um, as well as observed 24 and 70um photometry
(obtained with the MIPS instrument of the Spitzer Space Telescope) for
our sample of 150 planet-bearing stars and 118 stars without planets.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 123 268 Photospheric predictions and MIPS photometry
refs.dat 147 19 References
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Stallar identification
12- 15 A4 --- Pl Star with planet(SWP)/Star without planet(SWOP)
17- 22 F6.3 Gyr Age ? Age
24- 25 I2 --- r_Age ? Reference for Age, in refs.dat file
27- 33 F7.4 [-] [Fe/H] ? Metallicity (1)
35- 42 F8.2 mJy F24P Predicted photospheric flux at 24um
44- 51 F8.2 mJy F24 ? Observed flux at 24um
53- 58 F6.2 mJy e_F24 ? 1-σ uncertainty in F24 (2)
60- 66 F7.3 --- R24 ? Observed-to-predicted flux ratio at 24um (3)
68- 74 F7.3 --- chi24 ? Significance of excess emission at 24um (4)
76- 78 A3 --- IRE24 ? Excess emission at 24um (5)
80- 87 F8.2 mJy F70P Predicted photospheric flux at 70um
89- 96 F8.2 mJy F70 ? Observed flux at 70um
98-103 F6.2 mJy e_F70 ? Observed 1-sigma flux uncertainty at 70um (2)
105-111 F7.3 --- R70 ? Observed-to-predicted flux ratio at 70um (3)
113-119 F7.3 --- chi70 ? Significance of excess emission at 70um (4)
121-123 A3 --- IRE70 ? Excess emission at 70um (5)
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Note (1): Metallicities are averages of values presented in the
NASA/IPAC/NExScI Star and Exoplanet Database
(http://nsted.ipac.caltech.edu)
Note (2): 1-σ uncertainties of the observed flux include the
uncertainty of the absolute calibration (4% for 24um and 7%
for 70um, see the MIPS Data Handbook)
Note (3): R=FObs/FPred
Note (4): χ=(FObs-FPred)/σ; excess emission is significant if χ≥3
Note (5): Excess emission code:
NO = no excess
YES = significant excess
UPL = upper limit
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode BibCode
24- 44 A21 --- Aut Author's name
46-147 A102 --- Com Comments
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Acknowledgements:
Agnes Kospal, kospal(at)strw.leidenuniv.nl
(End) A. Kospal [Leiden Obs., Leiden Univ.], P. Vannier [CDS] 14-Jul-2009