J/A+A/675/L1 HD 100453 disk K1-band image (Xie+, 2023)
Dynamical detection of a companion driving a spiral arm in
a protoplanetary disk.
Xie C., Ren B.B., Dong R., Choquet E., Vigan A., Gonzalez J.-F., Wagner K.,
Fang T., Ubeira-Gabellini M.G.
<Astron. Astrophys. 675, L1 (2023)>
=2023A&A...675L...1X 2023A&A...675L...1X (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Infrared
Keywords: planet-disk interactions - protoplanetary disks -
techniques: high angular resolution - techniques: image processing -
stars: individual: HD 100453
Abstract:
Radio and near-infrared observations have observed dozens of
protoplanetary disks that host spiral arm features. Numerical
simulations have shown that companions may excite spiral density waves
in protoplanetary disks via companion-disk interaction. However, the
lack of direct observational evidence for spiral-driving companions
poses challenges to current theories of companion- disk interaction.
Here we report multi-epoch observations of the binary system HD 100453
with the Spectro-Polarimetric High-contrast Exoplanet REsearch
(SPHERE) facility at the Very Large Telescope. By recovering the
spiral features via robustly removing starlight contamination, we
measure spiral motion across 4yr to perform dynamical motion
analyses. The spiral pattern motion is consistent with the orbital
motion of the eccentric companion. With this first observational
evidence of a companion driving a spiral arm among protoplanetary
disks, we directly and dynamically confirm the long-standing theory on
the origin of spiral features in protoplanetary disks. With the
pattern motion of companion-driven spirals being independent of
companion mass, here we establish a feasible way of searching for
hidden spiral-arm-driving planets that are beyond the detection of
existing ground-based high-contrast imagers.
Description:
FITS file images of HD 100453 disk in K1-band total intensity
with SPHERE/IRDIS.
FITS files of disk images from VLT/SPHERE in K1 total intensity.
The stars are located at the mathematical centers of the arrays.
The units are in detector counts.
The SPHERE data were reduced with reference differential imaging and
data imputation using sequential nonnegative matrix factorization
Objects:
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RA (2000) DE Designation(s)
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11 33 05.57 -54 19 28.5 HD 100453 = HIP 56354
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 118 4 List of fits files
fits/* . 4 Individual fits files
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 25 F6.4 arcsec/pix scale ? Scale of the image
27- 29 I3 --- Nx Number of pixels along X-axis
31- 33 I3 --- Ny Number of pixels along Y-axis
35- 37 I3 Kibyte size Size of FITS file
39- 56 A18 --- FileName Name of FITS file, in subdirectory fits
58-118 A61 --- Title Title of the FITS file
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Acknowledgements:
Chen Xie, chen.xie(a)lam.fr
(End) Patricia Vannier [CDS] 16-Jun-2023