J/A+A/598/A43 2MASS J16042165-2130284 high-contrast images (Canovas+, 2017)
Constraining the mass of the planet(s) sculpting a disk cavity.
The intriguing case of 2MASS J16042165-2130284.
Canovas H., Hardy A., Zurlo A., Wahhaj Z., Schreiber M.R., Vigan A.,
Villaver E., Olofsson J., Meeus G., Menard F., Caceres C., Cieza L.A.,
Garufi A.
<Astron. Astrophys. 598, A43 (2017)>
=2017A&A...598A..43C 2017A&A...598A..43C (SIMBAD/NED BibCode)
ADC_Keywords: Stars, nearby ; Stars, pre-main sequence ; Stars, K-type
Keywords: protoplanetary disks - planet-disk interactions -
stars: variables: T Tauri, Herbig Ae/Be -
techniques: high angular resolution -
stars: individual: 2MASS J16042165-2130284
Abstract:
The large cavities observed in the dust and gas distributions of
transition disks may be explained by planet-disk interactions. At
145pc, 2MASS J16042165-2130284 (J1604) is a 5-12Myr old transitional
disk with different gap sizes in the mm- and micron-sized dust
distributions (outer edges at 79 and at 63AU, respectively). Its
12CO emission shows a 30 au cavity. This radial structure suggests
that giant planets are sculpting this disk.
We aim to constrain the masses and locations of plausible giant
planets around J1604.
We observed J1604 with the Spectro-Polarimetric High-contrast
Exoplanet REsearch (SPHERE) at the Very Large Telescope (VLT), in
IRDIFS_EXT, pupil-stabilized mode, obtaining YJH- band images with the
integral field spectrograph (IFS) and K1K2-band images with the
Infra-Red Dual-beam Imager and Spectrograph (IRDIS). The dataset was
processed exploiting the angular differential imaging (ADI) technique
with high-contrast algorithms.
Our observations reach a contrast of ΔK, ΔYH∼12mag from
0.15" to 0.80" (∼22 to 115AU), but no planet candidate is detected.
The disk is directly imaged in scattered light at all bands from Y to
K, and it shows a red color. This indicates that the dust particles in
the disk surface are mainly ≳0.3um-sized grains. We confirm the sharp
dip/decrement in scattered light in agreement with polarized light
observations. Comparing our images with a radiative transfer model we
argue that the southern side of the disk is most likely the nearest.
This work represents the deepest search yet for companions around
J1604. We reach a mass sensitivity of ≳2-3MJup from ∼22 to ∼115AU
according to a hot start scenario. We propose that a brown dwarf
orbiting inside of ∼15AU and additional Jovian planets at larger radii
could account for the observed properties of J1604 while explaining
our lack of detection.
Description:
The article describes high-contrast images of the protoplanetary disk
2MASS J16042165-2130284, obtained with the Spectro-Polarimetric
High-contrast Exoplanet REsearch (SPHERE).
* Fig1.fits: It corresponds to Fig. 1 of the article. The file
contains the Angular Differential Imaging (ADI) + Principal Component
Analysis (PCA) image of the disk in K1 band, showing no point sources
inside of the disk cavity from ∼22 au onwards.
* Fig4_ifs.fits: It corresponds to Fig. 4 (IFS part) of the article.
The datacube contains the 3 IFS broadband images, corresponding to the
Y [*,*, 0], J [*,*,1], H [*,*,2] bands.
* Fig4_ird.fits: It corresponds to Fig. 4 (IRDIS part) of the article.
The datacube contains the 2 IRDIS images (220x220pix), corresponding
to the K1 [*,*, 0], and K2 [*,*,1] bands.
Objects:
-------------------------------------------------------------------
RA (2000) DE Designation(s)
-------------------------------------------------------------------
16 04 21.655 -21 30 28.40 J1604 = 2MASS J16042165-2130284
-------------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 108 3 List of fits files
fits/* . 3 Individual fits files
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 26 F7.5 arcsec/pix Scale Scale of the image
28- 30 I3 --- Nx Number of pixels along X-axis
32- 34 I3 --- Ny Number of pixels along Y-axis
36- 59 A24 --- Obs.Date Observation date (YYYY-MM-DDThh:mm:ss.sss)
61- 63 I3 Kibyte Size Size of FITS file
65- 77 A13 --- FileName Name of FITS file, in subdirectory fits
79-108 A30 --- Title Title of the FITS file
--------------------------------------------------------------------------------
Acknowledgements:
Hector Canovas, Hector.canovas(at)uam.es
(End) H. Canovas [Univ. Autonoma Madrid, Spain], P. Vannier [CDS] 21-Oct-2016