J/A+A/611/A6 ATLASGAL massive clumps H2CO data (Tang+, 2018)
ATLASGAL-selected massive clumps in the inner Galaxy:
VI. Kinetic temperature and spatial density measured with formaldehyde.
Tang X.D., Henkel C., Wyrowski F., Giannetti A., Menten K.M., Csengeri T.,
Leurini S., Urquhart J.S., Koenig C., Guesten R., Lin Y.X., Zheng X.W.,
Esimbek J., Zhou J.J.
<Astron. Astrophys. 611, A6 (2018)>
=2018A&A...611A...6T 2018A&A...611A...6T (SIMBAD/NED BibCode)
ADC_Keywords: Interstellar medium; Molecular clouds; Effective temperatures ;
Abundances
Keywords: stars: formation - stars: massive - ISM: clouds - ISM: molecules -
ISM: abundances - radio lines: ISM
Abstract:
Formaldehyde (H2CO) is a reliable tracer to accurately measure the
physical parameters of dense gas in star-forming regions.
We aim to determine directly the kinetic temperature and spatial
density with formaldehyde for the ∼100 brightest ATLASGAL-selected
clumps (the TOP100 sample) at 870um representing various evolutionary
stages of high-mass star formation.
Ten transitions (J=3-2 and 4-3) of ortho- and para-H2CO near 211, 218,
225, and 291GHz were observed with the Atacama Pathfinder EXperiment
(APEX) 12m telescope.
Description:
We selected the 110 brightest clumps from the ATLASGAL survey (the
TOP100 sample) obeying simple IR criteria to cover a range in
evolutionary stages as described in Giannetti et al. (2014, Cat.
J/A+A/570/A65, Paper I) and Koenig et al. (2017, Cat. J/A+A/599/A139,
Paper III).
These clumps consist almost entirely of clumps that have the potential
to form, or are forming, massive stars.
Our observations were carried out on 2013 July and December, 2014
September and November, and 2015 April, June, July, and October with
the Atacama Pathfinder EXperiment (APEX) 12m telescope located on
Chajnantor (Chile). Five transitions of H2CO (J=3-2) were observed
with the new MPIfR 1-mm receiver (PI230) with a beam size from
27.6" to 29.5" and integration times of 1 to 3 minutes. Five
H2CO (J=4-3) transitions were observed with the FLASH receiver
with a beam size ∼21.4" and integration times of 2 to 4 minutes.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 87 98 Source parameters
tablea2.dat 99 98 Ortho-H2CO (313-212) and (312-211)
spectral parameters
tablea3.dat 98 98 Para-H2CO (303-202) and (322-221)
spectral parameters
tablea4.dat 96 98 Para-H2CO (321-220) and (404-303)
spectral parameters
tablea5.dat 99 98 Para-H2CO (423-322) and (422-321)
spectral parameters
tablea6.dat 147 98 Beam filling factors, integrated intensity ratios,
para-H2CO column densities, spatial densities,
and kinetic temperatures
tablea7.dat 70 98 H2CO luminosities
--------------------------------------------------------------------------------
See also:
J/A+A/570/A65 : ATLASGAL massive clumps CO depletion (Giannetti+, 2014)
J/A+A/586/A149 : SiO in ATLASGAL-selected massive clumps (Csengeri+, 2016)
J/A+A/599/A139 : ATLASGAL massive clumps dust characterization (Koenig+, 2017)
J/A+A/602/A37 : ATLASGAL-selected massive clumps millimeter RRL (Kim+, 2017)
J/A+A/603/A33 : Temperature evolution in massive clumps (Giannetti+, 2017)
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- Source Source name (AGALLLL.lll+BB.bbb)
20- 21 I2 h RAh Right ascension (J2000)
23- 24 I2 min RAm Right ascension (J2000)
26- 30 F5.2 s RAs Right ascension (J2000)
32 A1 --- DE- Declination sign (J2000)
33- 34 I2 deg DEd Declination (J2000)
36- 37 I2 arcmin DEm Declination (J2000)
39- 42 F4.1 arcsec DEs Declination (J2000)
44- 47 F4.1 kpc Dist Distance
49- 50 I2 arcsec Size Size (full width to half power values of
the 870um continuum)
52- 56 F5.2 Jy/beam S870 Flux density at 870um (1)
58- 64 E7.1 cm-2 N(H2) ?=- H2 column density (2)
66- 71 E6.2 Msun Mclump Clump mass (2)
73- 78 E6.2 Lsun Lbol Bolometric luminosity (2)
80- 83 F4.1 K Tdust Dust temperature (2)
85- 87 A3 --- Note Notes (3)
--------------------------------------------------------------------------------
Note (1): selected from Csengeri et al. (2014, Cat. J/A+A/565/A75).
Note (2): From Koenig et al. (2017, Cat. J/A+A/599/A139, Paper III).
Note (3): Notes as follows:
70w = 70um weak
HII = HII region
IRb = mid-infrared bright
IRw = mid-infrared weak
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- Source Source name (AGALLLL.lll+BB.bbb)
20- 24 F5.2 K.km/s ITmbdvA ?=- Ortho-H2CO (313-212)
velocity-integrated intensity
26- 29 F4.2 K.km/s e_ITmbdvA ?=- rms uncertainty on ITmbdvA
31- 37 F7.2 km/s VlsrA ?=- Ortho-H2CO (313-212) LSR velocity
39- 42 F4.2 km/s e_VlsrA ?=- rms uncertainty on VlsrA
44- 48 F5.2 km/s FWHMA ?=- Ortho-H2CO (313-212) FWHM
50- 53 F4.2 km/s e_FWHMA ?=- rms uncertainty on FWHMA
55- 59 F5.2 K TmbA ?=- Ortho-H2CO (313-212) mean
brightness temperature
61- 65 F5.2 K ITmbdvB ?=- Ortho-H2CO (312-211)
velocity-integrated intensity
67- 70 F4.2 K e_ITmbdvB ?=- rms uncertainty on ITmbdvB
72- 78 F7.2 km/s VlsrB ?=- Ortho-H2CO (312-211) LSR velocity
80- 83 F4.2 km/s e_VlsrB ?=- rms uncertainty on VlsrB
85- 89 F5.2 km/s FWHMB ?=- Ortho-H2CO (312-211) FWHM
91- 94 F4.2 km/s e_FWHMB ?=- rms uncertainty on FWHMB
96- 99 F4.2 K TmbB ?=- Ortho-H2CO (312-211) mean
brightness temperature
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- Source Source name (AGALLLL.lll+BB.bbb)
20- 24 F5.2 K.km/s ITmbdvC ?=- Para-H2CO (303-202)
velocity-integrated intensity
26- 29 F4.2 K.km/s e_ITmbdvC ?=- rms uncertainty on ITmbdvC
31- 37 F7.2 km/s VlsrC ?=- Para-H2CO (303-202) LSR velocity
39- 42 F4.2 km/s e_VlsrC ?=- rms uncertainty on VlsrC
44- 48 F5.2 km/s FWHMC ?=- Para-H2CO (303-202) FWHM
50- 53 F4.2 km/s e_FWHMC ?=- rms uncertainty on FWHMA
55- 58 F4.2 K TmbC ?=- Para-H2CO (303-202) peak main beam
brightness temperature
60- 64 F5.2 K ITmbdvD ?=- Para-H2CO (322-221)
velocity-integrated intensity
66- 69 F4.2 K e_ITmbdvD ?=- rms uncertainty on ITmbdvB
71- 77 F7.2 km/s VlsrD ?=- Para-H2CO (322-221) LSR velocity
79- 82 F4.2 km/s e_VlsrD ?=- rms uncertainty on VlsrD
85- 88 F4.2 km/s FWHMD ?=- Para-H2CO (322-221) FWHM
90- 93 F4.2 km/s e_FWHMD ?=- rms uncertainty on FWHMD
95- 98 F4.2 K TmbD ?=- Para-H2CO (322-221) peak main beam
brightness temperature
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- Source Source name (AGALLLL.lll+BB.bbb)
20- 24 F5.2 K.km/s ITmbdvE ?=- Para-H2CO (321-220)
velocity-integrated intensity
26- 29 F4.2 K.km/s e_ITmbdvE ?=- rms uncertainty on ITmbdvE
31- 36 F6.2 km/s VlsrE ?=- Para-H2CO (321-220) LSR velocity
38- 41 F4.2 km/s e_VlsrE ?=- rms uncertainty on VlsrE
43- 46 F4.2 km/s FWHME ?=- Para-H2CO (321-220) FWHM
48- 51 F4.2 km/s e_FWHME ?=- rms uncertainty on FWHME
53- 56 F4.2 K TmbE ?=- Para-H2CO (321-220) peak main beam
brightness temperature
58- 62 F5.2 K ITmbdvF ?=- Para-H2CO (404-303)
velocity-integrated intensity
64- 67 F4.2 K e_ITmbdvF ?=- rms uncertainty on ITmbdvF
69- 75 F7.2 km/s VlsrF ?=- Para-H2CO (404-303) LSR velocity
77- 80 F4.2 km/s e_VlsrF ?=- rms uncertainty on VlsrF
82- 86 F5.2 km/s FWHMF ?=- Para-H2CO (404-303) FWHM
88- 91 F4.2 km/s e_FWHMF ?=- rms uncertainty on FWHMF
93- 96 F4.2 K TmbF ?=- Para-H2CO (404-303) peak main beam
brightness temperature
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- Source Source name (AGALLLL.lll+BB.bbb)
20- 24 F5.2 K.km/s ITmbdvG ?=- Para-H2CO (423-322)
velocity-integrated intensity
26- 29 F4.2 K.km/s e_ITmbdvG ?=- rms uncertainty on ITmbdvG
31- 37 F7.2 km/s VlsrG ?=- Para-H2CO (423-322) LSR velocity
39- 42 F4.2 km/s e_VlsrG ?=- rms uncertainty on VlsrG
44- 48 F5.2 km/s FWHMG ?=- Para-H2CO (423-322) FWHM
50- 53 F4.2 km/s e_FWHMG ?=- rms uncertainty on FWHMG
55- 58 F4.2 K TmbG ?=- Para-H2CO (423-322) peak main beam
brightness temperature
60- 64 F5.2 K ITmbdvH ?=- Para-H2CO (422-321)
velocity-integrated intensity
66- 69 F4.2 K e_ITmbdvH ?=- rms uncertainty on ITmbdvH
71- 77 F7.2 km/s VlsrH ?=- Para-H2CO (422-321) LSR velocity
79- 82 F4.2 km/s e_VlsrH ?=- rms uncertainty on VlsrH
84- 88 F5.2 km/s FWHMH ?=- Para-H2CO (422-321) FWHM
90- 93 F4.2 km/s e_FWHMH ?=- rms uncertainty on FWHMH
96- 99 F4.2 K TmbH ?=- Para-H2CO (422-321) peak main beam
brightness temperature
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- Source Source name (AGALLLL.lll+BB.bbb)
20- 24 F5.3 --- etabfA para-H2CO (303-202) beam filling factor,
ηbf
26- 30 F5.3 --- etabfB para-H2CO (404-303) beam filling factor,
ηbf
32- 35 F4.2 --- I'F/I'C ?=- Integrated intensity ratio
I'(404-303)/I'(303-202)
37- 40 F4.2 --- e_I'F/I'C ?=- rms uncertainty on I'F/I'C
42 A1 --- n_N(pH2CO) Limit flag on N(pH2CO)
43- 49 E7.2 cm-2 N(pH2CO) ?=- para-H2CO column density
51- 57 E7.2 cm-2 N(oH2CO) ?=- ortho-H2CO column density
59- 64 E6.3 cm-3 n(H2) ?=- H2 spatial density
65 A1 --- --- [+]
66- 71 E6.3 cm-3 E_n(H2) ? Error on n(H2) (upper value)
72 A1 --- --- [-]
73- 78 E6.3 cm-3 e_n(H2) ? Error on n(H2) (lower value)
80 A1 --- l_TE/C Limit flag on TC
81- 85 F5.1 K TE/C ?=- Kinetic temperature for
(321-220/303-202) ratio
86 A1 --- --- [+]
87- 90 F4.1 K E_TE/C ? Error on TE/C (upper value)
91 A1 --- --- [-]
92- 95 F4.1 K e_TE/C ? Error on TE/C (lower value)
97 A1 --- l_TLTEE/C Limit flag on TLTEE/C
98-102 F5.1 K TLTEE/C ?=- LTE kinetic temperature for
(321-220/303-202) ratio
103 A1 --- --- [+]
104-108 F5.1 K E_TLTEE/C ? Error on TLTEE/C (upper value)
109 A1 --- --- [-]
110-113 F4.1 K e_TLTEE/C ? Error on TLTEE/C (lower value)
115 A1 --- l_TH/F Limit flag on TH/F
116-120 F5.1 K TH/F ?=- Kinetic temperature for
(422-321/404-303) ratio
121 A1 --- --- [+]
122-125 F4.1 K E_TH/F ? Error on TH/F (upper value)
126 A1 --- --- [-]
127-130 F4.1 K e_TH/F ? Error on TH/F (lower value)
132 A1 --- l_TLTEH/F Limit flag on TLTEH/F
133-137 F5.1 K TLTEH/F ?=- LTE kinetic temperature for
(422-321/404-303) ratio
138 A1 --- --- [+]
139-142 F4.1 K E_TLTEH/F ? Error on TLTEH/F (upper value)
143 A1 --- --- [-]
144-147 F4.1 K e_TLTEH/F ? Error on TLTEH/F (lower value)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- Source Source name (AGALLLL.lll+BB.bbb)
20- 25 F6.2 K.km/s/pc2 L'H2COA ?=- H2CO (313-212) luminosity
27- 32 F6.2 K.km/s/pc2 L'H2COB ?=- H2CO (312-211) luminosity
34- 38 F5.2 K.km/s/pc2 L'H2COC ?=- H2CO (303-202) luminosity
40- 44 F5.2 K.km/s/pc2 L'H2COD ?=- H2CO (322-221) luminosity
46- 50 F5.2 K.km/s/pc2 L'H2COE ?=- H2CO (321-220) luminosity
52- 57 F6.2 K.km/s/pc2 L'H2COF ?=- H2CO (404-303) luminosity
59- 64 F6.2 K.km/s/pc2 L'H2COG ?=- H2CO (423-322) luminosity
66- 70 F5.2 K.km/s/pc2 L'H2COH ?=- H2CO (422-321) luminosity
--------------------------------------------------------------------------------
Acknowledgements:
Xindi Tang, xdtang(at)mpifr-bonn.mpg.de
References:
Giannetti et al., Paper I 2014A&A...570A..65G 2014A&A...570A..65GC, Cat. J/A+A/570/A65
Csengeri et al., Paper II 2016A&A...586A.149C 2016A&A...586A.149C, Cat. J/A+A/586/A149
Koenig et al., Paper III 2017A&A...599A.139K 2017A&A...599A.139K, Cat. J/A+A/599/A139
Kim et al., Paper IV 2017A&A...602A..37K 2017A&A...602A..37K, Cat. J/A+A/602/A37
Giannetti et al., Paper V 2017A&A...603A..33G 2017A&A...603A..33G, Cat. J/A+A/603/A33
(End) Patricia Vannier [CDS] 04-Dec-2017