J/ApJS/208/29 HIP stars with 22µm excess (Wu+, 2013)
Bright 22µm excess candidates from the WISE all-sky catalog and the Hipparcos
main catalog.
Wu C.-J., Wu H., Lam M.-I., Yang M., Wen X.-Q., Li S., Zhang T.-J., Gao L.
<Astrophys. J. Suppl. Ser., 208, 29 (2013)>
=2013ApJS..208...29W 2013ApJS..208...29W
ADC_Keywords: Photometry, infrared ; Stars, nearby ; Stars, double and multiple
Keywords: infrared: stars - planetary systems - protoplanetary disks -
stars: formation
Abstract:
In this paper, we present a catalog that includes 141 bright
candidates (≤10.27mag, V band) showing an excess of infrared (IR) at
22µm. Of these 141 candidates, 38 stars are known IR-excess stars
or disks, 23 stars are double or multiple stars, and 4 are Be stars
while the remaining more than 70 stars are identified as 22 µm
excess candidates in our work. The criterion for selecting candidates
is Ks-[22]µm. All these candidates are selected from the
Wide-field Infrared Survey Explorer all-sky data cross-correlated with
the Hipparcos main catalog and the likelihood-ratio technique is
employed. Considering the effect of background, we introduce the IRAS
100µm level to exclude the high background. We also estimate the
coincidence probability of these sources. In addition, we present the
optical to mid-IR spectral energy distributions and optical images for
all the candidates, and give the observed optical spectra of six stars
with the National Astronomical Observatories, Chinese Academy of
Sciences' 2.16m telescope. To measure for the amount of dust around
each star, the fractional luminosity is also provided. We also test
whether our method of selecting IR-excess stars can be used to search
for extra-solar planets; we cross-match our catalog with known
IR-excess stars with planets but found no matches. Finally, we give
the fraction of stars showing excess IR for different spectral types
of main-sequence stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 185 141 Stars with 22um excess
refs.dat 82 9 References
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See also:
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
J/MNRAS/426/91 : Kepler stars with infrared excess emission (Kennedy+, 2012)
J/AJ/134/26 : Binaries with white dwarf in 2MASS (Hoard+, 2007)
J/ApJ/660/1556 : Characterization of dusty debris disks (Rhee+, 2007)
J/ApJ/653/675 : Spitzer 24µm photometry of A dwarfs (Su+, 2006)
J/ApJ/586/1356 : White dwarfs with cool companions (Wachter+, 2003)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP Hipparcos star identifier
8- 19 F12.8 deg RAdeg Right Ascension in decimal degrees (J2000)
21- 31 F11.7 deg DEdeg Declination in decimal degrees (J2000)
33- 37 F5.2 mag Bmag [3.73/11.76] Johnson B band magnitude
39- 42 F4.2 mag e_Bmag [0/0.02] Uncertainty in Bmag
44- 48 F5.2 mag Vmag [3.85/10.2] Johnson V band magnitude
50- 53 F4.2 mag Imag [3.8/8.3] Johnson I band magnitude
55- 58 F4.2 mag e_Imag [0/0.2] Uncertainty in Imag
60- 63 F4.2 mag Jmag [3.8/7.42] 2MASS J band magnitude
65- 68 F4.2 mag e_Jmag [0.02/0.3] Uncertainty in Jmag
70- 73 F4.2 mag Hmag 2MASS H band magnitude
75- 78 F4.2 mag e_Hmag Uncertainty in Hmag
80- 83 F4.2 mag Ksmag [3.82/7.34] 2MASS Ks band magnitude
85- 88 F4.2 mag e_Ksmag [0.01/0.3] Uncertainty in Ksmag
90- 93 F4.2 mag [3.4] [3.7/7.3] WISE 3.4 micron band magnitude (W1)
95- 98 F4.2 mag e_[3.4] [0.03/0.2] Uncertainty in [3.4]
100-103 F4.2 mag [4.6] WISE 4.6 micron band magnitude (W2)
105-108 F4.2 mag e_[4.6] Uncertainty in [4.6]
110-113 F4.2 mag [12] WISE 12 micron band magnitude (W3)
115-118 F4.2 mag e_[12] Uncertainty in [12]
120-123 F4.2 mag [22] [1.82/6.78] WISE 22 micron band magnitude (W4)
125-128 F4.2 mag e_[22] [0.01/0.05] Uncertainty in [22]
130-133 F4.2 mag K-22 [0.2/4.6] The (Ks-22um) color index (1)
135-138 F4.2 mag e_K-22 Uncertainty in K-22
140-147 E8.3 --- fd [0/1] Dust fractional luminosity (2)
149-153 A5 --- SpT MK spectral type from Hipparcos
155-183 A29 --- Note Additional notes for stars (3)
185 I1 --- Ref ? Reference (see refs.dat file)
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Note (1): The criterion of searching for 22 µm excess stars
Note (2): The luminosity ratio fd=LIR/F*, calculated as explained
in Section 3.4.
Note (3): Abbreviations used in notes:
C = Contaminated stars from W4 band (22um) images;
D = Double star;
M = multiple star;
Disk = IR excess stars with disk;
Double? = May be the double system.
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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 I1 --- Ref Reference code
3- 21 A19 --- BibCode Bibcode
23- 38 A16 --- Auth First author's name
40- 82 A43 --- Comm Comment
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 04-Nov-2013