J/ApJ/660/1556 Characterization of dusty debris disks (Rhee+, 2007)
Characterization of dusty debris disks: the IRAS and Hipparcos catalogs.
Rhee J.H., Song I., Zuckerman B., McElwain M.
<Astrophys. J., 660, 1556-1571 (2007)>
=2007ApJ...660.1556R 2007ApJ...660.1556R
ADC_Keywords: Stars, dwarfs ; Infrared sources ; Planets ; Interstellar medium
Keywords: infrared: stars - planetary systems: protoplanetary disks
Abstract:
Dusty debris disks around main-sequence stars are signposts for the
existence of planetesimals and exoplanets. From cross-correlating
Hipparcos stars with the IRAS catalogs, we identify 146 stars within
120pc of Earth that show excess emission at 60um. This search took
special precautions to avoid false positives. Our sample is reasonably
well distributed from late B to early K-type stars, but it contains
very few later type stars. Even though IRAS flew more than 20 years
ago and many astronomers have cross-correlated its catalogs with
stellar catalogs, we were still able to newly identify debris disks at
as many as 33 main-sequence stars; of these, 32 are within 100pc of
Earth. The power of an all-sky survey satellite like IRAS is evident
when comparing our 33 new debris disks with the total of only 22 dusty
debris disk stars first detected with the more sensitive, but pointed,
satellite ISO. Our investigation focuses on the mass, dimensions, and
evolution of dusty debris disks.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 120 146 Stars with Dusty Debris Disks
notes.dat 80 61 Notes
table4.dat 69 103 List of Rejected Sources
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See also:
II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP Hipparcos number
8- 13 I6 --- HD ? HD number
15- 22 A8 --- SpType Spectral type (from Hipparcos)
24- 27 F4.1 mag Vmag The V band magnitude (from Hipparcos)
29- 33 F5.1 pc Dist Distance (from Hipparcos)
35- 38 F4.2 solRad Rstar Stellar radius from SED fit
40- 44 I5 K Tstar Stellar temperature from SED fit
46- 48 I3 K Tdust Dust temperature from blackbody fit
49 A1 --- u_Tdust [?] Uncertainty flag on Tdust
51- 53 I3 AU Rdust Dust semimajor axis
55- 59 F5.2 arcsec s-dust Angular separation between star and dust
61 A1 --- l_tau Limit flag on tau
62- 69 E8.2 --- tau Fractional dust luminosity, LIR/Lbol
71- 78 E8.2 geoMass Mdust ? Dust mass in units of earth masses
80- 81 A2 --- f_Mdust "dd" when dust mass measurements from sub-mm
observations
84- 85 A2 --- l_Age [≲ >] Limit flag on Age
87- 90 I4 Myr Age ? Stellar age
91- 92 A2 --- u_Age [? ] Uncertainty flag on Age
94-103 A10 --- Method Method of age determination (1)
105-112 A8 --- Excess Source of excess dust confirmation
114-120 A7 --- Notes Additional note(s), in notes.dat file
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Note (1): Method of age determination as follows:
S2000 = Song et al. (2000ApJ...533L..41S 2000ApJ...533L..41S)
S2001 = Song (2001, n ASP Conf. Ser. 244, 221)
SBZ = Song et al. (2002A&A...385..862S 2002A&A...385..862S)
ZFK = Zuckerman et al. (1995ApJ...446L..79Z 1995ApJ...446L..79Z)
ZSBW = Zuckerman et al. (2001ApJ...562L..87Z 2001ApJ...562L..87Z)
ZSW = Zuckerman et al. (2001ApJ...559..388Z 2001ApJ...559..388Z)
ZW = Zuckerman & Webb (2000ApJ...535..959Z 2000ApJ...535..959Z)
SZB = Song, Zuckerman, & Bessell (2003ApJ...599..342S 2003ApJ...599..342S)
a = UVW; Zuckerman & Song (2004ARA&A..42..685Z 2004ARA&A..42..685Z)
b = X-ray emission; e.g., Song, Zuckerman, & Bessell
(2003ApJ...599..342S 2003ApJ...599..342S)
c = lithium age; Song, Zuckerman, & Bessell (2003ApJ...599..342S 2003ApJ...599..342S)
d = location on an A-star Hertzsprung-Russell diagram
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Note Note number
4- 80 A77 --- Text Text of the note
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP HIP number
7 A1 --- n_HIP [b] Note (1)
9- 14 I6 --- HD ? HD number
17- 27 A11 --- IRAS IRAS source name
29- 59 A31 ---- Cont Contamination source
61- 64 A4 --- Source Additional data source
66- 69 A4 --- Rej Reason for rejection (2)
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Note (1): Both IRAS and ISO reported excess emission at 60um, and Greaves
et al. (2004MNRAS.351L..54G 2004MNRAS.351L..54G) reported excess emission at 850um.
However, Spitzer MIPS observations show a stellar photosphere
detection at 70um.
Note (2): Reason for rejection as follows:
1 = There exists a nearby extended source within 3sigma IRAS
positional error ellipse
2 = SED shows that IRAS 60 or MIPS 70um detection falls on the
stellar photosphere
3 = No source was detected at the expected stellar position in
MIPS 70um image
4 = There exists a second bright star within 3sigma IRAS positional
error ellipse
5 = IRAS 60um excess is likely caused by cirrus contamination
6 = This star, a member of the Pleiades cluster, is likely
contaminated by cirrus (Kalas et al., 2002ApJ...567..999K 2002ApJ...567..999K)
7 = IRAS SCANPI shows 1' offset in in-scan direction where the listed
galaxy is located
8 = The 3sigma IRAS positional error ellipse does not include the
target star
9 = Moor et al. (2006ApJ...644..525M 2006ApJ...644..525M) rejected this star based on
their Spitzer MIPS observation
10 = Infrared excess had <2.5sigma detection at IRAS 60um band (see
Sect. 2 for the definition of sigma)
11 = IRAS FSC long format indicates a large offset between 60 and 12um
positions
12 = IRAS SCANPI shows 30" offset in the in-scan direction where the
listed galaxy is located
13 = Spitzer MIPS 70um image shows extended emission
14 = There exists a huge background galaxy behind this star
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History:
From electronic version of the journal
References:
Zuckerman & Song, Paper I 2004ApJ...603..738Z 2004ApJ...603..738Z
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 18-Mar-2009