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. =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: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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, L_IR_/L_bol_ 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 -------------------------------------------------------------------------------- Note (1): Method of age determination as follows: S2000 = Song et al. (2000ApJ...533L..41S) S2001 = Song (2001, n ASP Conf. Ser. 244, 221) SBZ = Song et al. (2002A&A...385..862S) ZFK = Zuckerman et al. (1995ApJ...446L..79Z) ZSBW = Zuckerman et al. (2001ApJ...562L..87Z) ZSW = Zuckerman et al. (2001ApJ...559..388Z) ZW = Zuckerman & Webb (2000ApJ...535..959Z) SZB = Song, Zuckerman, & Bessell (2003ApJ...599..342S) a = UVW; Zuckerman & Song (2004ARA&A..42..685Z) b = X-ray emission; e.g., Song, Zuckerman, & Bessell (2003ApJ...599..342S) c = lithium age; Song, Zuckerman, & Bessell (2003ApJ...599..342S) d = location on an A-star Hertzsprung-Russell diagram -------------------------------------------------------------------------------- Byte-by-byte Description of file: notes.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 --- Note Note number 4- 80 A77 --- Text Text of the note -------------------------------------------------------------------------------- Byte-by-byte Description of file: table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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) -------------------------------------------------------------------------------- Note (1): Both IRAS and ISO reported excess emission at 60um, and Greaves et al. (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) 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) 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 -------------------------------------------------------------------------------- History: From electronic version of the journal References: Zuckerman & Song, Paper I 2004ApJ...603..738Z ================================================================================ (End) Greg Schwarz [AAS], Patricia Vannier [CDS] 18-Mar-2009