J/A+A/667/A12 PRODIGE I. Per-emb-50 datacubes (Valdivia-Mena+, 2022)
PRODIGE - envelope to disk with NOEMA.
I. A 3000 au streamer feeding a Class I protostar.
Valdivia-Mena M.T., Pineda J.E., Segura-Cox D.M., Caselli P., Neri R.,
Lopez-Sepulcre A., Cunningham N., Bouscasse L., Semenov D., Henning T.,
Pietu V., Chapillon E., Dutrey A., Fuente A., Guilloteau S., Hsieh T.H.,
Jimenez-Serra I., Marino S., Maureira M.J., Smirnov-Pinchukov G.V.,
Tafalla M., Zhao B.
<Astron. Astrophys. 667, A12 (2022)>
=2022A&A...667A..12V 2022A&A...667A..12V (SIMBAD/NED BibCode)
ADC_Keywords: Interferometry ; YSOs ; Spectra, millimetric/submm
Keywords: ISM: kinematics and dynamics - ISM: individual objects: Per-emb-50 -
ISM: structure - stars: protostars - stars: formation
Abstract:
In the past few years, there has been a rise in the detection
of streamers, asymmetric flows of material directed toward the
protostellar disk with material from outside a star's natal core. It
is unclear how they affect the process of mass accretion, in
particular beyond the Class 0 phase.
We investigate the gas kinematics around Per-emb-50, a Class I source
in the crowded star-forming region NGC 1333. Our goal is to study how
the mass infall proceeds from envelope to disk scales in this source.
We use new NOEMA 1.3mm observations, including C18O, H2CO, and SO,
in the context of the PRODIGE MPG - IRAM program, to probe the core
and envelope structures toward Per-emb-50. Results. We discover a
streamer delivering material toward Per-emb-50 in H2CO and C18O
emission. The streamer's emission can be well described by the
analytic solutions for an infalling parcel of gas along a streamline
with conserved angular momentum, both in the image plane and along the
line-of-sight velocities. The streamer has a mean infall rate of
1.3x10-3Msun/yr, five to ten times higher than the current accretion
rate of the protostar. SO and SO2 emission reveal asymmetric infall
motions in the inner envelope, additional to the streamer around
Per-emb-50. Furthermore, the presence of SO2 could mark the impact
zone of the infalling material.
The streamer delivers sufficient mass to sustain the protostellar
accretion rate and might produce an accretion burst, which would
explain the protostar's high luminosity with respect to other Class
I sources. Our results highlight the importance of late infall for
protostellar evolution: streamers might provide a significant amount
of mass for stellar accretion after the Class 0 phase.
Description:
Data cubes for H2CO (303-202), C18O (2-1), SO (55-44) and
SO2 (11111-10010) molecular line emissions. The cubes come from
the MPG-IRAM large program PRODIGE (Protostars and Disks: Global
Evolution). These are not the cubes that come directly from the
imaging routine, but smaller cubes centered at the location of
Per-emb-50, and the area includes all observed emission.
Objects:
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RA (2000) DE Designation(s)
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03 29 07.74 +31 21 57.5 Per-emb 50 = [EES2009] Per-emb 50
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 181 4 List of fits datacubes
fits/* . 4 Individual fits datacubes
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See also:
https://github.com/tere-valdivia/Per-emb-50_results : Codes to
replicate results
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- 22 I3 --- Nx Number of pixels along X-axis
24- 26 I3 --- Ny Number of pixels along Y-axis
28- 30 I3 --- Nz Number of pixels along Z-axis
32- 39 F8.5 km/s bVRAD Lower value of VRAD interval
41- 47 F7.4 km/s BVRAD Upper value of VRAD interval
49- 57 F9.7 km/s dVRAD VRAD resolution
59- 63 I5 Kibyte size Size of FITS file
65-122 A58 --- FileName Name of FITS file, in subdirectory fits
124-181 A58 --- Title Title of the FITS file
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Acknowledgements:
Maria Teresa Valdivia-Mena, mvaldivi(at)mpe.mpg.de
(End) Maria Teresa Valdivia-Mena [MPE], Patricia Vannier [CDS] 19-Oct-2022