J/A+A/658/A104 HL Tau SO2 14(0-14)-13(1,13) datacube (Garufi+, 2022)
ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT).
VI: Accretion shocks in the disk of DG Tau and HL Tau.
Garufi A., Podio L., Codella C., Segura-Cox D., Vander Donckt M.,
Mercimek S., Bacciotti F., Fedele D., Kasper M., Pineda J.E., Humphreys E.,
Testi L.
<Astron. Astrophys. 658, A104 (2022)>
=2022A&A...658A.104G 2022A&A...658A.104G (SIMBAD/NED BibCode)
ADC_Keywords: Stars, pre-main sequence ; Molecular data ; Radio lines
Keywords: astrochemistry - protoplanetary disks
Abstract:
Planet-forming disks are not isolated systems. Their interaction with
the surrounding medium affects their mass budget and chemical content.
In the context of the ALMA-DOT program, we obtained high-resolution
maps of assorted lines from six disks that are still partly embedded
in their natal envelope. In this work, we examine the SO and SO2
emission that is detected from four sources: DG Tau, HL Tau,
IRAS 04302+2247, and T Tau. The comparison with CO, HCO+, and CS
maps reveals that the SO and SO2 emission originates at the
intersection between extended streamers and the planet-forming disk.
Two targets, DG Tau and HL Tau, offers clear cases of inflowing
material inducing an accretion shock on the disk material. The
measured rotational temperatures and radial velocities are consistent
with this view. In contrast to younger Class 0 sources, these shocks
are confined to the specific disk region impacted by the streamer. In
HL Tau, the known accreting streamer induces a shock in the disk
outskirt, and the released SO and SO2 molecules spiral toward the
star in a few hundreds years. These results suggest that shocks
induced by late accreting material may be common in the disks of young
star-forming regions with possible consequences on the chemical
composition and mass content of the disk. They also highlight the
importance of SO and SO2 line observations to probe accretion shocks
from a larger sample.
Description:
This work makes use of ALMA Band 5, 6, 7, and 9 observations
from Cycles 4, 5, and 6. Within the ALMA-DOT program (P.I.: Podio,
L.), six sources were observed in Band 6 during Cycle 4
(2016.1.00846.S) and Cycle 6 (2018.1.01037.S) using 12 narrow and
high-resolution (0.16km/s and 0.2km/s) spectral windows (SPWs) and
one broad and low-resolution SPW (0.6km/s and 1.2km/s) for the
continuum.
we focus on the five spectral windows (SPWs) covering four SO2
transitions and one 34SO2 transition, and on the four sources that
show emission in SO2, namely DG Tau, HL Tau, IRAS04302, and T Tau.
We also make use of ALMA Cycle 5 observations of HL Tau from program
2017.1.01178.S (P.I.: Humphreys, E.) covering one SO2 transition in
Band 7 and three SO transitions in Band 9. In total, 11 SO2 lines
(including the 34SO2 isotopolog) and 4 SO lines are probed by the
observations presented in this work.
Datacube of SO2 14(0-14)-13(1,13) in HL Tau
Objects:
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RA (2000) DE Designation(s)
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04 31 38.47 +18 13 58.1 HL Tau = V* HL Tau
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 163 1 Informations on FITS datacube
fits/* . 1 FITS datacube
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See also:
J/A+A/644/A120 : HL TAU and IRAS04302+2247 H2CS ALMA images (Codella+, 2020)
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- 23 I4 --- Nx Number of pixels along X-axis
25- 28 I4 --- Ny Number of pixels along Y-axis
30- 31 I2 --- Nz Number of slices
33- 54 A22 "datime" Obs.date Observation date
56- 62 F7.3 GHz bFrep Lower value of frequency interval
64- 70 F7.3 GHz BFrep Upper value of frequency interval
72- 77 I6 Hz dFrep Frequency resolution
79- 84 I6 Kibyte size Size of FITS file
86-119 A34 --- FileName Name of FITS file, in subdirectory fits
121-163 A43 --- Title Title of the FITS file
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Acknowledgements:
Antonio Garufi, antonio.garufi(at)inaf.it
(End) Patricia Vannier [CDS] 20-Jan-2022