J/A+A/681/L2 FITS images of V1247 Ori (Ren+, 2024)
A companion in V1247 Ori supported by motion in the pattern of the spiral arm.
Ren B.B., Xie C., Benisty M., Dong R., Bae J., Stolker T.,
van Holstein R.G., Debes J.H., Garufi A., Ginski C., Kraus S.
<Astron. Astrophys. 681, L2 (2024)>
=2024A&A...681L...2R 2024A&A...681L...2R (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Interstellar medium ; Polarization ; Infrared
Keywords: techniques: high angular resolution - protoplanetary disks -
planet-disk interactions - stars: individual: V1247 Ori
Abstract:
While nearly two dozen spiral arms have been detected from
planet-forming disks in near-infrared scattered light, none of their
substellar drivers has been confirmed. By observing spiral systems in
at least two epochs spanning multiple years and measuring the motion
of the spirals, we can distinguish what causes the spirals and locate
the orbits of the driving planets if the spirals are triggered by
them. Upon a recent validation of this approach using the comotion
between a stellar companion and a spiral, we obtained a second-epoch
observation for the spiral system in the disk of V1247 Ori in the
H-band polarized scattered light using Very Large Telescope (VLT),
SPHERE, and IRDIS. By combining our observations with archival IRDIS
data, we established a 4.8yr timeline to constrain the spiral motion
of V1247 Ori. We obtained a pattern speed of 0.40±0.10deg/yr
for the northeast spiral. This corresponds to an orbital period of
900±220yr, and the semimajor axis of the hidden planetary driver
therefore is 118±20au for a 2.0±0.1M☉ central star. The
location agrees with the gap in ALMA dust-continuum observations,
which provides joint support for the hypothesis that a companion
drives the scattered-light spirals while carving a millimeter gap.
With an angular separation of 0.29"±0.05", this hidden companion is
an ideal target for JWST imaging.
Description:
FITS files of disk images in SPHERE/IRDIS (H-band) from
the Very Large Telescope.
The stars are located at the mathematical centers of the arrays.
The units are in counts per pixel for Qphi data.
Objects:
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RA (2000) DE Designation(s)
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05 38 05.25 -01 15 21.6 V1247 Ori = TIC 11199521
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 155 2 List of fits images
fits/* . 2 Individual fits images
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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 A9 --- Name Star name
11- 12 I2 h RAh Right ascension (J2000)
14- 15 I2 min RAm Right ascension (J2000)
17- 21 F5.2 s RAs Right ascension (J2000)
23 A1 --- DE- Declination sign (J2000)
24- 25 I2 deg DEd Declination (J2000)
27- 28 I2 arcmin DEm Declination (J2000)
30- 34 F5.2 arcsec DEs Declination (J2000)
36- 39 I4 --- Nx Number of pixels along X-axis
41- 44 I4 --- Ny Number of pixels along Y-axis
46- 55 A10 "date" Obs.date Observation date
57- 60 I4 Kibyte size Size of FITS file
62-107 A46 --- FileName Name of FITS file, in subdirectory fits
109-155 A47 --- Title Title of the FITS file
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Acknowledgements:
Bin Ren, bin.ren(at)oca.eu
(End) Patricia Vannier [CDS] 08-Dec-2023