J/A+A/602/A8 Cepheus E CO, OH and OI spectra (Gusdorf+, 2017)
Nature of shocks revealed by SOFIA OI observations in the Cepheus E
protostellar outflow.
Gusdorf A., Anderl S., Lefloch B., Leurini S., Wiesemeyer H., Guesten R.,
Benedettini M., Codella C., Godard B., Gomez-Ruiz A.I., Jacobs K.,
Kristensen L.E., Lesaffre P., Pineau des Forets G., Lis D.C.
<Astron. Astrophys. 602, A8 (2017)>
=2017A&A...602A...8G 2017A&A...602A...8G (SIMBAD/NED BibCode)
ADC_Keywords: Infrared sources ; Interstellar medium ; Carbon monoxide
Keywords: astrochemistry - stars: formation - ISM: jets and outflows -
ISM: individual objects: Cepheus E - ISM: kinematics and dynamics -
infrared: ISM
Abstract:
Protostellar jets and outflows are key features of the star-formation
process, and primary processes of the feedback of young stars on the
interstellar medium. Understanding the underlying shocks is necessary
to explain how jet and outflow systems are launched, and to quantify
their chemical and energetic impacts on the surrounding medium.
We performed a high-spectral resolution study of the [OI]63um
emission in the outflow of the intermediate-mass Class 0 protostar Cep
E-mm. The goal is to determine the structure of the outflow, to
constrain the chemical conditions in the various components, and to
understand the nature of the underlying shocks, thus probing the
origin of the mass-loss phenomenon.
We present observations of the OI 3P1 -> 3P2, OH between
2Π1/2 J=3/2 and J=1/2 at 1837.8GHz, and CO (16-15) lines with
the GREAT receiver onboard SOFIA towards three positions in the Cep E
protostellar outflow: Cep E-mm (the driving protostar), Cep E-BI (in
the southern lobe), and Cep E-BII (the terminal position in the
southern lobe).
Description:
All spectra shown in Fig. 2 are provided in FITS format at their
nominal spectral and spatial resolution x-axis is the lsr velocity (in
km/s) y-axis is the main beam temperature (in K) they were obtained
with the SOFIA-GREAT receiver (see Table 2 for details):
- the CO, OH, and OI spectra shown in the upper panel (Cep E - mm
position) are in the co-cepe-mm.fits, oh-cepe-mm.fits, and
oI-cepe-mm.fits files;
- the CO, OH, and OI spectra shown in the middle panel (Cep E - BI
position) are in the co-cepe-BI.fits, oh-cepe-BI.fits, and
oI-cepe-BI.fits files;
- the CO, OH, and OI spectra shown in the upper panel (Cep E - BII
position) are in the co-cepe-BII.fits, oh-cepe-BII.fits, and
oI-cepe-BII.fits files.
Objects:
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RA (2000) DE Designation(s)
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23 03 12.78 +61 42 25.8 Cep E = IRAS 23011+6126
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 135 9 List of spectra
fits/* . 9 Individual spectra
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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- 22 I3 --- Nx Number of pixels along X-axis
24- 42 A19 --- Obs.Date Observation date (YYYY-MM-DD:hh:mm:ss)
44- 54 F11.6 GHz RestFreq Rest frequency
56- 64 F9.6 GHz bFreq Lower value of frequency interval
66- 72 F7.5 GHz BFreq Upper value of frequency interval
74- 81 F8.5 MHz dFreq Frequency resolution
83 I1 Kibyte size Size of FITS file
85-100 A16 --- FileName Name of FITS file, in subdirectory fits
102-135 A34 --- Title Title of the FITS file
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Acknowledgements:
Antoine Gusdorf, antoine.gusdorf(at)lra.ens.fr
(End) Patricia Vannier [CDS] 07-Apr-2017