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 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 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 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