J/A+A/633/A37 RXJ1604.3-2130A griz and JHK light curves (Sicilia-Aguilar+, 2020)
Time-resolved photometry of the young dipper RX J1604.3-2130A:
Unveiling the structure and mass transport through the innermost disk.
Sicilia-Aguilar A., Manara C.F., de Boer J., Benisty M., Pinilla P.,
Bouvier J.
<Astron. Astrophys. 633, A37 (2020)>
=2020A&A...633A..37S 2020A&A...633A..37S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; YSOs ; Photometry, ugriz ; Photometry, infrared
Keywords: stars: individual: RX J1604.3-2130A -
stars: variables: T Tauri, Herbig Ae/Be - protoplanetary disks -
stars: formation
Abstract:
RX J1604.3-2130A is a young, dipper-type, variable star in the Upper
Scorpius association, suspected to have an inclined inner disk with
respect to its face-on outer disk.
We study the eclipses to constrain the inner disk properties. We use
time-resolved photometry from the Rapid Eye Mount telescope and
Kepler 2 data to study the multi-wavelength variability, and archival
optical and IR data to track accretion, rotation, and changes in disk
structure.
The observations reveal details of the structure and matter transport
through the inner disk. The eclipses show 5d quasi-periodicity, with
the phase drifting in time and some periods showing
increased/decreased eclipse depth and frequency. Dips are consistent
with extinction by slightly processed dust grains in an inclined,
irregularly-shaped inner disk locked to the star through two
relatively stable accretion structures. The grains are located near
the dust sublimation radius (∼0.09au) at the corotation radius, and
can explain the shadows observed in the outer disk. The total mass
(gas and dust) required to produce the eclipses and shadows is a few %
of a Ceres mass. Such amount of mass is accreted/replenished by
accretion in days to weeks, which explains the variability from period
to period. Spitzer and WISE variability reveal variations in the dust
content in the innermost disk on a few years timescale, which is
consistent with small imbalances (compared to the stellar accretion
rate) in the matter transport from the outer to the inner disk.
A decrease in the accretion rate is observed at the times of less
eclipsing variability and low mid-IR fluxes, confirming this picture.
The vsini=16km/s confirms that the star cannot be aligned with the
outer disk, but is likely close to equator-on and to be aligned with
the inner disk. This anomalous orientation is a challenge for standard
theories of protoplanetary disk formation.
Description:
Relative photometry obtained with the Rapid Eye Mount (REM) telescope
for the star RX J1604.3-2130A. The optical magnitudes are given
relative to MJD 58346.021046, while the JHK magnitudes are calibrated
using 2MASS data. The uncertainties include the photometric
uncertainty and the uncertainty in the relative photometry.
Objects:
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RA (ICRS) DE Designation(s)
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16 04 21.65 -21 30 28.5 RX J1604.3-2130A = 2MASS J16042165-2130284
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 64 271 Optical photometry of RX J1604.3-2130A
tablea2.dat 48 92 JHK photometry of RX J1604.3-2130A
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 12 F12.6 d MJD Modified Julian Date of observations
14- 19 F6.3 mag gpmag ?=- REM relative g' mag (1)
21- 25 F5.3 mag e_gpmag ? Uncertainty in g' mag
27- 32 F6.3 mag rpmag ?=- REM relative r' mag (1)
34- 38 F5.3 mag e_rpmag ? Uncertainty in r' mag
40- 45 F6.3 mag ipmag ?=- REM relative i' mag (1)
47- 51 F5.3 mag e_ipmag ? Uncertainty in i' mag
53- 58 F6.3 mag zpmag ?=- REM relative z' mag (1)
60- 64 F5.3 mag e_zpmag ? Uncertainty in z' mag
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Note (1): All magnitudes are given relative to those of MJD=58346.021046 for
which g'=12.47±0.02mag, r'=11.01±0.04mag, i'=11.72±0.08mag
and z'=11.01±0.08mag. Note that g' is the only one for which the
color terms are negligible, so that the absolute calibration is highly
uncertain for r', i', and z'.
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 12 F12.6 MJD MJD Modified Julian Date (1)
14- 18 F5.3 mag Jmag ?=- REM relative J mag (2)
20- 24 F5.3 mag e_Jmag ? Uncertainty in J mag
26- 30 F5.3 mag Hmag ?=- REM relative H mag (2)
32- 36 F5.3 mag e_Hmag ? Uncertainty in H mag
38- 42 F5.3 mag Ksmag ?=- REM relative Ks mag (2)
44- 48 F5.3 mag e_Ksmag ? Uncertainty in Ks mag
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Note (1): The JHK exposures are not fully simultaneous, so the MJD indicated is
the one of the shortest wavelength observation available.
Note (2): All magnitudes are calibrated using 2MASS data, with absolute
calibration errors 2-4% not included in the uncertainty.
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Acknowledgements:
Aurora Sicilia-Aguilar, asiciliaaguilar(at)dundee.ac.uk
(End) Patricia Vannier [CDS] 13-Nov-2019