J/ApJ/823/58 Photo-reverberation mapping of 27 YSOs in LDN1688 (Meng+, 2016)
Photo-reverberation mapping of a protoplanetary accretion disk around
a T Tauri star.
Meng H.Y.A., Plavchan P., Rieke G.H., Cody A.M., Guth T., Stauffer J.,
Covey K., Carey S., Ciardi D., Duran-Rojas M.C., Gutermuth R.A.,
Morales-Calderon M., Rebull L.M., Watson A.M.
<Astrophys. J., 823, 58-58 (2016)>
=2016ApJ...823...58M 2016ApJ...823...58M (SIMBAD/NED BibCode)
ADC_Keywords: YSOs ; Photometry, infrared
Keywords: accretion, accretion disks; circumstellar matter;
protoplanetary disks; stars: individual: YLW 16B;
stars: variables: T Tauri, Herbig Ae/Be
Abstract:
Theoretical models and spectroscopic observations of newborn stars
suggest that protoplanetary disks have an inner "wall" at a distance
set by the disk interaction with the star. Around T Tauri stars, the
size of this disk hole is expected to be on a 0.1au scale that is
unresolved by current adaptive optics imaging, though some
model-dependent constraints have been obtained by near-infrared
interferometry. Here we report the first measurement of the inner disk
wall around a solar-mass young stellar object, YLW 16B in the
ρ Ophiuchi star-forming region, by detecting the light-travel time
of the variable radiation from the stellar surface to the disk.
Consistent time lags were detected on two nights, when the time series
in H (1.6µm) and K (2.2µm) bands were synchronized while the
4.5µm emission lagged by 74.5±3.2s. Considering the nearly
edge-on geometry of the disk, the inner rim should be 0.084au from the
protostar on average, with an error of order 0.01au. This size is
likely larger than the range of magnetospheric truncations and
consistent with an optically and geometrically thick disk front at the
dust sublimation radius at ∼1500K. The widths of the cross-correlation
functions between the data in different wavebands place possible new
constraints on the geometry of the disk.
Description:
The Spitzer observations were made in its warm mission with the
Infrared Array Camera (IRAC) under program 60109 for three periods of
staring mode observations at 4.5um, on 2010 April 20, 22, and 24,
respectively.
Near-simultaneous ground-based observations were made with the
FLAMINGOS on the 4m Mayall telescope at Kitt Peak National
Observatory, Arizona; the Spartan Infrared Camera on the 4m SOAR
telescope and the ANDICAM on the SMARTS 1.3m telescope, both at Cerro
Tololo Inter-American Observatory, Chile; and Camila on the Harold L.
Johnson 1.5m telescope of Observatorio Astronomico Nacional (OAN) at
Sierra San Pedro Martir, Mexico.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 82 27 Index of the sources monitored in the
reverberation experiment
table2.dat 30 74493 Differential photometry of all sources monitored
in the reverberation experiment
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See also:
II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)
II/297 : AKARI/IRC mid-IR all-sky Survey (ISAS/JAXA, 2010)
J/A+A/581/A30 : Herschel maps of ρ Oph (Rebollido+, 2015)
J/AJ/148/122 : YSOVAR: infrared photometry in Lynds 1688 (Gunther+, 2014)
J/AJ/147/82 : Monitoring of disk-bearing stars in NGC 2264 (Cody+, 2014)
J/ApJS/211/3 : NIR photometry variability in ρ Oph (Parks+, 2014)
J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)
J/AJ/145/59 : Optical and MIR photometry of PTF 10nvg (Hillenbrand+, 2013)
J/ApJS/184/18 : Spitzer survey of young stellar clusters (Gutermuth+, 2009)
J/ApJS/181/321 : Properties of Spitzer c2d dark clouds (Evans+, 2009)
J/A+A/498/167 : Embedded sources in L 1688 (van Kempen+, 2009)
J/A+A/485/155 : HK photometry of rho Oph PMS stars (Alves de Oliveira+, 2008)
J/A+A/469/575 : Spitzer mid-IR spectra of 3 molecular clouds (Berne+, 2007)
J/ApJ/646/297 : Spitzer obs. of pre-main-sequence stars (Rebull+, 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/130/1145 : YSO near-infrared properties (Doppmann+, 2005)
J/ApJ/566/993 : rho Oph (Lynds 1688) cluster NICMOS imaging (Allen+, 2002)
J/A+A/359/113 : X-ray and IR study of Rho Oph dark cloud (Grosso+, 2000)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Index of monitored source
4- 13 F10.6 deg RAdeg [246.8/247] Right Ascension (J2000)
15- 24 F10.6 deg DEdeg [-24.73/-24.6] Declination (J2000)
26- 28 A3 --- --- [YLW]
30- 32 A3 --- YLW YLW identifier (Young+ 1986ApJ...304L..45Y 1986ApJ...304L..45Y)
34- 36 A3 --- --- [IRS]
38- 39 I2 --- IRS ? IRS identifier (Wilking+, 1989ApJ...340..823W 1989ApJ...340..823W;
in Simbad)
41- 47 A7 --- --- [ISO-Oph]
49- 51 I3 --- ISO-Oph ? Iso-Oph identifier
(Bontemps+, 2001, J/A+A/372/173)
53- 54 A2 --- --- [GY]
56- 58 I3 --- [GY92] ? GY identifier
(Greene & Young, 1992ApJ...395..516G 1992ApJ...395..516G)
60- 66 A7 --- --- [2MASS J]
67- 82 A16 --- 2MASS 2MASS identifier (HHMMSSss+DDMMSSs; J2000)
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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- 2 I2 --- Seq Index of monitored source, as in Table 1
4 A1 --- Inst [ACFS] Instrument used to monitor source (1)
6 I1 d Day [1/3] Observation run day (2)
8- 16 F9.3 s BJD Barycentric Julian Date (TDB) in seconds (3)
18- 23 F6.3 mag dNIRmag [-4.1/11.6] Differential NIR magnitude (4)
25- 30 F6.3 mag e_dNIRmag [0.001/48]? Uncertainty in dNIRmag (4)
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Note (1): Instrument used to monitor source:
A = ANDICAM, SMARTS 1.3m telescope, CTIO, Chile;
C = Camila, Harold L. Johnson 1.5m, OAN, Sierra San Pedro Martir, Mexico;
F = FLAMINGOS, 4-m Mayall telescope, KPNO, Arizona;
S = Spartan Infrared Camera, 4m SOAR telescope, CTIO, Chile.
Note (2): A missing day sequence means that the star was not covered by that
instrument on that night. The Modified Barycentric Julian Date of
each Day is:
1 = 55306
2 = 55308
3 = 55310
Note (3): The mid-exposure time is given in Barycentric Julian Date in
barycentric dynamical time (BJD_TDB) and is expressed in seconds offset
from the Modified BJD of the observation Day (See Note 2).
Note (4): dNIRmag passband depends upon Instr:
A = K band;
C = K band;
F = H band;
S = H band.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 08-Aug-2016