J/MNRAS/488/4638 Infall and outflow on massive star-forming regions (Li+, 2019)
Effects of infall and outflow on massive star-forming regions.
Li Q., Zhou J., Esimbek J., He Y., Baan W., Li D., Wu G., Tang X., Ji W.,
Komesh T., Sailanbek S.
<Mon. Not. R. Astron. Soc., 488, 4638-4647 (2019)>
=2019MNRAS.488.4638L 2019MNRAS.488.4638L (SIMBAD/NED BibCode)
ADC_Keywords: Star Forming Region ; Interstellar medium ;
Spectra, millimetric/submm ; YSOs
Keywords: stars: formation - stars: massive - stars: statistic - ISM: clouds -
ISM: jets and outflows - ISM: molecules
Abstract:
A total of 188 high-mass outflows have been identified from a sample
of 694 clumps from the Millimetre Astronomy Legacy Team 90GHz survey,
representing a detection rate of approximately 27 per cent. The
detection rate of outflows increases from the proto-stellar stage to
the HII stage, but decreases again at the photodissociation (PDR)
stage suggesting that outflows are being switched off during the PDR
stage. An intimate relationship is found between outflow action and
the presence of masers, and water masers appear together with 6.7GHz
methanol masers. Comparing the infall detection rate of clumps with
and without outflows, we find that outflow candidates have a lower
infall detection rate. Finally, we find that outflow action has some
influence on the local environment and the clump itself, and this
influence decreases with increasing evolutionary time as the outflow
action ceases.
Description:
The Millimetre Astronomy Legacy Team 90GHz survey (MALT90) aims to
characterize the physical and chemical evolution of high-mass
star-forming clumps (Jackson et al. 2013PASA...30...57J 2013PASA...30...57J; Foster et al.
2011ApJS..197...25F 2011ApJS..197...25F, Cat. J/ApJS/197/25, 2013PASA...30...38F 2013PASA...30...38F).
He et al. (2015MNRAS.450.1926H 2015MNRAS.450.1926H, Cat. J/MNRAS/450/1926,
2016MNRAS.461.2288H 2016MNRAS.461.2288H, Cat. J/MNRAS/461/2288) selected 732 high-mass
clumps with N2H+(1-0), HNC(1-0), and HCO+(1-0) emission lines
detected from the MALT90 survey with S/N>3 and an angular distance
between any two sources larger than the Mopra beam size (36arcsec at
90GHz). These clumps with detected N2H+, HNC, and HCO+ emission
lines with S/N>3 are more evolved than 8016 ATLASGAL clumps at
corresponding evolutionary stages. The distance range is from 0.5kpc
to 17kpc. 38 clumps were excluded because they are close to the edge
of the 3arcminx3arcmin map, which may affect the reliability of the
outflow identification. Therefore, our sample included 694 massive
star-forming regions. Then, we searched for outflow candidates in
these 694 high-mass clumps.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 104 105 Outflow properties of the blue and red lobes
tablea2.dat 51 694 The clumps basic information
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See also:
J/ApJS/197/25 : MALT90 pilot survey (Foster+, 2011)
J/MNRAS/450/1926 : Infall motions in massive star-forming regions (He+, 2015)
J/MNRAS/461/2288 : Infall motions in massive star-forming regions (He+, 2016)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Clump ATLASGAL designation (GLLL.lll+B.bbb)
16- 21 F6.1 Msun Mout Outflow mass
23- 29 F7.1 Msun.km/s p Outflow momentum
31- 38 F8.2 10+38J E Outflow energy
40- 43 F4.1 10+4yr tdyn Dynamical time
45- 50 F6.2 10-3Msun.km/s/yr Fout Mechanical force
52- 58 F7.3 Lsun Lout Mechanical luminosity
60- 65 F6.2 10-4Msun/yr dotM Mass-Loss rate
67- 72 F6.1 km/s dvbmin Integrated blue-shifted velocity
range, min
74- 79 F6.1 km/s dvbmax Integrated blue-shifted velocity
range, max
81- 86 F6.1 km/s dvrmin Integrated red-shifted velocity
range, min
88- 93 F6.1 km/s dvrmax Integrated red-shifted velocity
range, max
95- 99 F5.2 kpc Dist Distance
101-104 F4.2 kpc e_Dist Error on Dist
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Clump ATLASGAL designation (GLLL.lll+BB.bbb)
17- 20 F4.2 [Msun] logMclump ? Logarithm of the Clump mass
22- 25 F4.2 km/s PixFWHM Local region FWHM of N2H+
27- 31 F5.3 km/s FWHM Clump FWHM of N2H+
33- 45 A13 --- Type Evolution Type
47- 51 A5 --- Notes Notes (1)
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Note (1): Notes as follows:
i = infall candidates
o = outflow candidates
w = water masers
m = methanol masers
s = SiO
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 28-Dec-2022