J/A+A/650/A173 Four Herbig-Haro objects SOFIA/FIFI-LS images (Sperling+, 2021)
Evolution of the atomic component in protostellar outflows.
Sperling T., Eisloeffel J., Fischer C., Nisini B., Giannini T., Krabbe A.
<Astron. Astrophys. 650, A173 (2021)>
=2021A&A...650A.173S 2021A&A...650A.173S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, pre-main sequence ; Infrared
Keywords: ISM: jets and outflows - ISM: Herbig-Haro objects - stars: formation -
stars: mass-loss
Abstract:
We present SOFIA/FIFI-LS observations of three Class 0 and one Class I
outflows (Cep E, HH 1, HH 212, and L1551 IRS5) in the far-infrared
[OI]63um and [OI]145um transitions. Spectroscopic [OI]63um maps enable
us to infer the spatial extent of warm (T∼500-1200K), low-excitation
atomic gas within these protostellar outflows. Our main goal is to
determine mass-loss rates from the obtained [OI]63um maps and compare
these with accretion rates from other studies. The far-infrared
[OI]63um emission line is predicted to be the main coolant of dense,
dissociative J-shocks caused by decelerated wind or jet shocks. If
proper shock conditions prevail, the instantaneous mass-ejection rate
is directly connected to the [OI]63um luminosity. In order to unravel
evolutionary trends we analyse a set of 14 Class 0/I outflow sources
that have been spatially resolved in the [OI]63um emission. We compare
these data with a sample of 74 Class 0/I/II outflow sources that have
been observed with Herschel (WISH, DIGIT, WILL, GASPS surveys) without
spatially resolving the [OI]63um line.
Description:
SOFIA/FIFI-LS datacubes of HH1, HH212, L1551 IRS5, and Cep E are presented.
These four targets have been mapped in the two [OI]63.2um and
[OI]145.5um transitions along the outflow.
Objects:
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RA (2000) DE Designation(s)
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05 36 20.8 -06 45 13 HH1 = HH 1
05 43 51.41 -01 02 53.1 HH212 = HH 212
04 31 34.08 +18 08 04.9 L1551 IRS 5 = L1551 IRS 5
23 03 12.78 +61 42 25.8 Cep E = NAME Cep E
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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 32 List of fits images
fits/* . 32 Individual fits images
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See also:
J/A+A/642/A216 : Five Herbig-Haro objects SOFIA/FIFI-LS images (Sperling+ 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- 22 I3 --- Nx Number of pixels along X-axis
24- 26 I3 --- Ny Number of pixels along Y-axis
28- 30 I3 Kibyte size Size of FITS file
32- 63 A32 --- FileName Name of FITS file, in subdirectory fits (1)
65-155 A91 --- Title Title of the FITS file
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Note (1): units in continuum maps: 10-13erg/s/cm2/µm,
units in emission maps: 10-13erg/s/cm2.
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Acknowledgements:
Thomas Sperling, thomas(at)tls-tautenburg.de
(End) Patricia Vannier [CDS] 29-Apr-2021