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J/ApJ/705/1226     Planet-bearing stars in Spitzer           (Bryden+, 2009)

Planets and debris disks: results from a Spitzer/MIPS search for infrared excess. Bryden G., Beichman C.A., Carpenter J.M., Rieke G.H., Stapelfeldt K.R., Werner M.W., Tanner A.M., Lawler S.M., Wyatt M.C., Trilling D.E., Su K.Y.L., Blaylock M., Stansberry J.A. <Astrophys. J., 705, 1226-1236 (2009)> =2009ApJ...705.1226B
ADC_Keywords: Photometry, infrared ; Stars, ages ; Spectral types ; Planets Keywords: circumstellar matter - infrared: stars - Kuiper Belt - planetary systems Abstract: Using the MIPS camera on the Spitzer Space Telescope, we have searched for debris disks around 104 stars known from radial velocity studies to have one or more planets. Combining this new data with 42 already published observations of planet-bearing stars, we find that 14 of the 146 systems have IR excess at 24 and/or 70um. Only one star, HD 69830, has IR excess exclusively at 24um, indicative of warm dust in the inner system analogous to that produced by collisions in the solar system's asteroid belt. For the other 13 stars with IR excess the emission is stronger at 70um, consistent with cool dust (<100K) located beyond 10AU, well outside of the orbital location of the known planets. Description: Throughout this paper, we contrast between two samples - stars with known radial-velocity planets and stars without. The bulk of the planet-bearing sample comes from two programs - an initial guaranteed time (GTO) survey with observations from 2004 to 2006 (PI: G. Rieke) and a later general observer (GO) survey from 2007 to 2008 (PI: J. Carpenter). The early dataset consists of 46 planet-bearing stars, 25 already discussed by Beichman et al. (2005ApJ...622.1160B) and 21 newly presented here, while the later data set has 71 additional MIPS observations. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 107 149 Spitzer observations of planet-bearing stars
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) J/ApJ/700/L73 : Photospheric fluxes at 24 and 70µm (Kospal+, 2009) J/A+A/485/571 : Metallicities + activities of southern stars (Jenkins+, 2008) J/ApJS/179/451 : IR excesses for protoplanetary disks (Kenyon+, 2008) J/ApJ/660/1556 : Characterization of dusty debris disks (Rhee+, 2007) J/AJ/132/161 : NStars project: The southern sample. I. (Gray+, 2006) J/MNRAS/372/163 : Activity indices for southern stars (Jenkins+, 2006) J/ApJ/646/505 : Catalog of nearby exoplanets (Butler+, 2006) J/ApJS/152/261 : Chromospheric Ca II emission in nearby stars (Wright+, 2004) J/AJ/126/2048 : NStars project: the Northern Sample. I. (Gray+, 2003) J/MNRAS/328/45 : Late-type stars members of young groups (Montes+, 2001) J/AJ/111/439 : Chromospheric emission in late-type stars. (Henry+ 1996) : NStED homepage : the Extrasolar Planets Encyclopaedia Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Star name 12- 14 A3 --- n_Name [c-h, ] Remarks about the star (1) 16- 23 A8 --- OName Other designation 25- 31 A7 --- SpType MK spectral type from NStED (the NASA Star and Exoplanet Database) 33- 37 F5.1 pc Dist ? Distance from the Hipparcos catalogue 39- 42 F4.2 mag Ksmag 2MASS Ks-band magnitude 44- 47 F4.1 Gyr Age ? Estimated age 49- 61 A13 --- r_Age Age reference(s) (2) 63- 68 F6.1 mJy F24 ? Spitzer/MIPS 24um flux (3) 70- 73 F4.2 --- F24/F ? Observed flux relative to the expected stellar flux (Fν/Fν*) at 24um 75- 80 F6.1 mJy F70 Spitzer/MIPS 70um flux (3) 82- 86 F5.1 mJy e_F70 F70 uncertainty 88- 92 F5.1 --- F70/F Observed flux relative to the expected stellar flux (Fν/Fν,*_) at 70um 94- 97 F4.1 --- chi Significance of excess (Equation (1)) 99 A1 --- l_Lum Limit flag on Lum 100-104 F5.1 10-5 Lum Luminosity ratio L_dust_/L_*_ at 70um (4) 106-107 A2 --- Ref Spitzer reference (5)
Note (1): Flag as follows: c = Binary or triple star; see Mugrauer & Neuhauser (2009A&A...494..373M) for individual references. d = Star with excess 70um emission. e = Star with excess 24um emission. f = Based on the Hubble Space Telescope (HST) astrometry, Bean et al. (2007AJ....134..749B) conclude that the companion of HD 33636 is not a planet but rather a low-mass star in a near face-on orbit. While Beichman et al. (2005ApJ...622.1160B) identified HD 33636 as a planet-bearing star with strong 70um excess, we no longer include this star in our planet sample. g = Radial-velocity observations by Moro-Martin et al. (2007ApJ...658.1312M) and Wright et al. (2007ApJ...657..533W) do not confirm the planet around HD 150706. This star is not included in our sample. h = Radial-velocity observations by Eggenberger et al. (2007A&A...466.1179E) do not confirm the planet around HD 188753A. This star is not included in our sample. Note (2): Age reference as follows: 1 = Gray et al. 2003, Cat. J/AJ/126/2048, 2006, Cat. J/AJ/132/161; 2 = Jenkins et al. 2006, Cat. J/MNRAS/372/163, 2008, Cat. J/A+A/485/571; 3 = Saffe et al. 2005A&A...443..609S; 4 = Henry et al. 1996, Cat. J/AJ/111/439; 5 = Wright et al. 2004, Cat. J/ApJS/152/261; 6 = Soderblom 1985AJ.....90.2103S; 7 = Barnes 2007ApJ...669.1167B; 8 = Hall et al. 2007AJ....133..862H; 9 = Backman et al. 2009ApJ...690.1522B; 10 = Montes et al. 2001, Cat. J/MNRAS/328/45; 11 = Butler et al. 2006, Cat. J/ApJ/646/505; 12 = This paper. Note (3): Color corrections have not been applied. For cold emission (∼50K), the color-corrected 70um flux is as much as ∼10% higher. Note (4): Minimum Ldust/L* based solely on the 70um emission (Equation (2)). Note (5): Spitzer data reference as follows: 1 = Beichman et al. 2005ApJ...622.1160B; 2 = This paper; 2a = from Spitzer PID 41, PI: G. Rieke; 2b = PID 40096, PI J. Carpenter; 2c = PID 30590, PI D. Koerner; 2d = PID 72, PI F. Low; 3 = Moro-Martin et al. 2007ApJ...658.1312M; 4 = Backman et al. 2009ApJ...690.1522B; 5 = Beichman et al. 2005ApJ...626.1061B; 6 = Beichman et al. 2006ApJ...652.1674B; 7 = Smith et al. 2006ApJ...644L.125S; 8 = Trilling et al. 2007ApJ...658.1289T; 9 = Gautier et al. 2007ApJ...667..527G
History: From electronic version of the journal
(End) Emmanuelle Perret [CDS] 05-Dec-2011
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