J/ApJ/845/120 Spitzer obs. of warm dust in 83 debris disks (Ballering+, 2017)
What sets the radial locations of warm debris disks?
Ballering N.P., Rieke G.H., Su K.Y.L., Gaspar A.
<Astrophys. J., 845, 120 (2017)>
=2017ApJ...845..120B 2017ApJ...845..120B
ADC_Keywords: Photometry, infrared ; Effective temperatures ; Stars, masses ;
Spectra, infrared
Keywords: circumstellar matter ; planetary systems
Abstract:
The architectures of debris disks encode the history of planet
formation in these systems. Studies of debris disks via their spectral
energy distributions (SEDs) have found infrared excesses arising from
cold dust, warm dust, or a combination of the two. The cold outer
belts of many systems have been imaged, facilitating their study in
great detail. Far less is known about the warm components, including
the origin of the dust. The regularity of the disk temperatures
indicates an underlying structure that may be linked to the water snow
line. If the dust is generated from collisions in an exo-asteroid
belt, the dust will likely trace the location of the water snow line
in the primordial protoplanetary disk where planetesimal growth was
enhanced. If instead the warm dust arises from the inward transport
from a reservoir of icy material farther out in the system, the dust
location is expected to be set by the current snow line. We analyze
the SEDs of a large sample of debris disks with warm components. We
find that warm components in single-component systems (those without
detectable cold components) follow the primordial snow line rather
than the current snow line, so they likely arise from exo-asteroid
belts. While the locations of many warm components in two-component
systems are also consistent with the primordial snow line, there is
more diversity among these systems, suggesting additional effects play
a role.
Description:
For our sample, we used the systems with a warm component found by
Ballering+ (2013, J/ApJ/775/55), where "warm" was defined as warmer
than 130K. All of these systems have data available from the Multiband
Imaging Photometer for Spitzer (MIPS) at 24 and 70um and from the
Spitzer Infrared Spectrograph (IRS). The selected 83 targets used for
our analysis are listed in Table 1.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 94 83 Target properties
table2.dat 53 329 Target photometry
table3.dat 33 29 Single-component fit results
table4.dat 61 54 Two-component fit results
refs.dat 67 45 References
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See also:
J/AJ/129/1049 : mm and sub-mm obs. of solar-type stars (Carpenter+, 2005)
J/ApJ/620/1010 : Spitzer 24µm photometry of A dwarfs (Rieke+, 2005)
J/A+A/452/245 : Near-IR photometry of PMS stars in rho Oph (Natta+, 2006)
J/ApJ/636/1098 : Debris disks around solar-type stars (Bryden+, 2006)
J/ApJ/653/675 : Spitzer 24µm photometry of A dwarfs (Su+, 2006)
J/ApJ/705/89 : IRS spectra of solar-type stars (Lawler+, 2009)
J/ApJ/705/1226 : Planet-bearing stars in Spitzer (Bryden+, 2009)
J/ApJ/753/147 : Herschel observations stars in THA (Donaldson+, 2012)
J/AJ/144/135 : Spitzer 24µm obs. of Hipparcos F stars (Mizusawa+, 2012)
J/MNRAS/427/343 : Infrared excesses of Hipparcos stars (McDonald+, 2012)
J/ApJ/768/25 : Spitzer & Herschel obs. of debris disks (Gaspar+, 2013)
J/ApJ/775/55 : Spitzer IR excesses in A-K stars (Ballering+, 2013)
J/A+A/555/A11 : DUNES survey observational results (Eiroa+, 2013)
J/ApJS/208/9 : Intrinsic colors & temperatures of PMS stars (Pecaut+, 2013)
J/ApJS/211/25 : Spitzer/IRS debris disk catalog. I. (Chen+, 2014)
J/ApJ/785/33 : F4-K2 stars high quality Spitzer/MIPS obs. (Sierchio+, 2014)
J/ApJ/798/87 : Spitzer/IRS debris disk catalog. II. (Mittal+, 2015)
J/AJ/149/131 : Param. of galactic nearby main-sequence stars (Eker+, 2015)
J/ApJ/823/108 : A dust model for bet Pic from 0.58-870um (Ballering+, 2016)
J/A+A/591/A108 : HD61005 SPHERE H and Ks images (Olofsson+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 1 I1 --- Comp [1/2] Number of components
3- 5 A3 --- --- [HIP]
7- 12 I6 --- HIP Hipparcos identifier
14- 14 A1 --- Ref [0/1] Source of stellar properties (1)
16- 21 A6 --- SpT MK spectral type
23- 26 F4.2 mag Vmag [3.3/9.2] V band magnitude
28- 31 F4.2 mag Jmag [3/8.3] J band magnitude
33- 36 F4.2 mag Hmag [2.9/8.1] H band magnitude
38- 41 F4.2 mag Kmag [2.9/8.1] K band magnitude
43- 47 I5 K Teff [5199/10642] Stellar surface temperature
49- 53 F5.2 Lsun Lstar [0.5/92.5] Bolometric luminosity
55- 58 F4.2 Msun Mstar [0.8/3] Stellar mass
60- 63 F4.1 um aBOS [0.5/15.5] Grain blowout size αBOS
65- 70 F6.2 pc Dist [14.8/165.1] Distance
72- 79 I8 --- AOR Spitzer/IRS Astronomical Observation Request id
81- 84 F4.2 --- xLL1 [0.9/1.1] Spectral correction factor,
IRS long low 1
86- 89 F4.2 --- xSL1 [0.9/1.2]? Spectral correction factor,
IRS short low 1
91- 94 F4.2 --- xSL2 [0.9/1.2]? Spectral correction factor,
IRS short low 2
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Note (1): Source of stellar properties as follows:
0 = Inferred from V-K color using the tabulated values maintained online,
http://www.pas.rochester.edu/~emamajek/EEM_dwarf_UBVIJHK_colors_Teff.txt;
1 = McDonald et al. (2012, J/MNRAS/427/343).
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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- 1 I1 --- Comp [1/2] Number of components
3- 5 A3 --- --- [HIP]
7- 12 I6 --- HIP Hipparcos identifier
14- 18 I5 um lambda [24/10000] Wavelength of observation
20- 20 A1 --- l_Fnu limit flag on Fnu
21- 27 F7.2 mJy Fnu [0.01/1827]? Flux density at lambda
29- 34 F6.2 mJy e_Fnu [0/192]? Uncertainty in Fnu
36- 49 A14 --- Inst Instrument
52- 53 I2 --- Ref [1/45] Reference (see refs.dat file)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [HIP]
5- 10 I6 --- HIP Hipparcos identifier
12- 16 F5.2 au r-warm [2.6/16.4] Warm dust location radius
18- 22 F5.2 10-5Mgeo M-warm [0.2/22.4] Warm dust mass
24- 28 F5.2 10-5 f-warm [0.8/29] Fractional luminosity, warm dust
30- 33 F4.2 --- cIRS [0.8/1] Amplitude adjustment, IRS data
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Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [HIP]
5- 10 I6 --- HIP Hipparcos identifier
12- 16 F5.2 au r-warm [0.5/36.1] Warm dust location radius
18- 23 F6.2 10-5Mgeo M-warm [0.03/324.3] Warm dust mass
25- 30 F6.2 10-5 f-warm [0.9/104.7] Fractional luminosity, warm dust
32- 37 F6.2 K T-cold [43.9/130] Temperature, cold component
39- 44 F6.2 10-5 f-cold [0.4/482.7] Fractional luminosity,
cold component
46- 51 F6.2 --- lam0 [50/350] Model parameter, λ0
53- 56 F4.2 --- beta [0.1/1.2] Model parameter, ~β
58- 61 F4.2 --- cIRS [0.8/1.1] Amplitude adjustment, IRS data
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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 Code reference
4- 22 A19 --- BibCode Bibcode of the reference
24- 48 A25 --- Auth Author's reference
50- 67 A18 --- Comm VizieR reference
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 05-Apr-2018