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J/ApJ/686/L115        Masses of evolved disks in PMS stars        (Cieza+, 2008)

The masses of transition circumstellar disks: observational support for photoevaporation models. Cieza L.A., Swift J.J., Mathews G.S., Williams J.P. <Astrophys. J., 686, L115-L118 (2008)> =2008ApJ...686L.115C
ADC_Keywords: Photometry, infrared ; Photometry, millimetric/submm ; Stars, pre-main sequence Keywords: circumstellar matter - planetary systems: protoplanetary disks - stars: pre-main sequence - submillimeter Abstract: We report deep Submillimeter Array observations of 26 pre-main-sequence (PMS) stars with evolved inner disks. These observations measure the mass of the outer disk (r∼20-100AU) across every stage of the dissipation of the inner disk (r<10AU) as determined by the IR spectral energy distributions (SEDs). We find that only targets with high mid-IR excesses are detected and have disk masses in the 1-5MJup range, while most of our objects remain undetected to sensitivity levels of MDISK∼0.2-1.5MJup. To put these results in a more general context, we collected publicly available data to construct the optical to millimeter wavelength SEDs of over 120 additional PMS stars. We find that the near-IR and mid-IR emissions remain optically thick in objects whose disk masses span 2 orders of magnitude (∼0.5-50MJup). Taken together, these results imply that, in general, inner disks start to dissipate only after the outer disk has been significantly depleted of mass. This provides strong support for photoevaporation being one of the dominant processes driving disk evolution. Description: We selected 11 objects located in the Ophiuchus molecular cloud from Cieza et al. (2007, Cat. J/ApJ/667/308), 10 objects from the Upper Scorpius association from Carpenter et al. (2006, Cat. J/ApJ/651/L49), and 5 objects from the TW Hydra association from Low et al. (2005ApJ...631.1170L). (Sub)millimeter interferometric observations were conducted with the Submillimeter Array (SMA) during the summer of 2007 (July 5-31, compact configuration) and the spring of 2008 (April 24-May 17, compact-north configuration). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 68 26 Submillimeter Array (SMA) sample
See also: J/A+A/485/155 : HK photometry of rho Oph PMS stars (Alves de Oliveira+, 2008) J/ApJ/667/308 : Weak-line T Tauri in Spitzer c2d Survey. II. (Cieza+, 2007) J/A+A/475/915 : L1489IRS observed by the submillimeter array (Brinch+, 2007) J/ApJ/671/1800 : SCUBA observations of ρ Oph cloud (Andrews+, 2007) J/ApJ/651/L49 : Upper Sco OB association IRAC observations (Carpenter+, 2006) J/A+A/452/245 : Near-IR photometry of PMS stars in rho Oph (Natta+, 2006) J/ApJ/630/381 : Mid-IR imaging in ρ Oph (Barsony+, 2005) J/AJ/121/1040 : PMS members of upper Scorpius OB association (Preibisch+, 2001) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 21 A21 --- Name Object Name 23- 27 F5.2 mag Ksmag 2MASS Ks band magnitude 29- 34 F6.1 mJy F24 Spitzer/MIPS flux density at 24 micron (1) 36 A1 --- l_F850 The 3 sigma limit flag on F850 38- 42 F5.1 mJy F850 ? SMA flux density at 850 micron (345GHz) 44- 47 F4.1 mJy e_F850 ? The 1 sigma error in F850 49 A1 --- l_F1300 The 3 sigma limit flag on F1300 51- 54 F4.1 mJy F1300 ? SMA flux density at 1300 micron (230GHz) 56- 58 F3.1 mJy e_F1300 ? The 1 sigma error in F1300 60 A1 --- l_MassD The 3 sigma limit flag on MassD 62- 68 A7 Msun MassD Disk mass in solar masses
Note (1): TWA and Ophicuhus data from Cieza et al. (2007, Cat. J/ApJ/667/308, <Cl* IC 348 CPS NNN> in Simbad) and Low et al. (2005ApJ...631.1170L), respectively. Upper Sco photometry obtained from archival data using the c2d pipeline (Evans et al. 2007, Final Delivery of Data from the c2d Legacy Project: IRAC and MIPS (Pasadena: SSC)).
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 17-Dec-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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