J/A+A/563/A97 IRAM 30m reduced spectra of 59 sources (Gerner+, 2014)
The chemical evolution in the early phases of massive star formation. I.
Gerner T., Beuther H., Semenov D., Linz H., Vasyunina T., Bihr S.,
Shirley Y.L., Henning T.
<Astron. Astrophys. 563, A97 (2014)>
=2014A&A...563A..97G 2014A&A...563A..97G
ADC_Keywords: Molecular clouds ; Spectroscopy
Keywords: stars: formation - stars: early-type - ISM: molecules -
(ISM:) evolution
Abstract:
Understanding the chemical evolution of young (high-mass) star-forming
regions is a central topic in star formation research. Chemistry is
employed as a unique tool 1) to investigate the underlying physical
processes and 2) to characterize the evolution of the chemical
composition. With these aims in mind, we observed a sample of 59
high-mass star-forming regions at different evolutionary stages
varying from the early starless phase of infrared dark clouds to
high-mass protostellar objects to hot molecular cores and, finally,
ultra-compact HII regions at 1mm and 3mm with the IRAM 30m
telescope. We determined their large-scale chemical abundances and
found that the chemical composition evolves along with the
evolutionary stages.
Description:
IRAM30m reduced spectra in TMB for 86.6GHz-94.2GHz, 217.3GHz-221.2GHz
and 241.3GHz-245.2GHz for the 59 sources in fits-format.
The file names are sourcename_s1.fits, sourcename_s2.fits,
sourcename_s3.fits and sourcename_s4.fits with
s1 = 86.6GHz-90.5GHz
s2 = 90.2GHz-94.2GHz
s3 = 217.3GHz-221.2GHz
s4 = 241.3GHz-245.2GHz
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 84 59 Source list showing the position, the distance,
and the evolutionary stage of all high-mass
star-forming regions
list.dat 167 236 List of spectra
fits/* . 236 Individual FITS spectra
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 A12 --- Name Source name
14- 15 I2 h RAh Right ascension (J2000)
17- 18 I2 min RAm Right ascension (J2000)
20- 23 F4.1 s RAs Right ascension (J2000)
25 A1 --- DE- Declination sign (J2000)
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 33 I2 arcsec DEs Declination (J2000)
35- 41 F7.3 deg GLON Galactic longitude
43- 50 F8.4 deg GLAT Galactic latitude
53- 57 F5.2 kpc Dist Distance (preferred value)
58 A1 --- n_Dist [cd] Note on Dist (1)
59- 63 F5.2 kpc Dist2 ? Distance (alternative value)
65 A1 --- n_Dist2 [egh] Note on Dist2 (1)
67- 71 A5 --- Type Stage of source (3)
72 A1 --- f24 [yn-] flag for embedded 24um point sources (2)
74 A1 --- f70 [yn-] flag for embedded 70um point sources (2)
75 A1 --- n_f70 [bf] Weak or no source (1)
77- 84 A8 --- Ref Sources of the dust continuum data:
ATLASGAL, SCUBA or Mambo
--------------------------------------------------------------------------------
Note (1): Notes as follows:
b = very weak emission compared with the background located at the same
position as 24µm emission source
c = for vlsr=111.3km/s (preferred) or 97.6km/s (alternative)
d = for vlsr=100.2km/s (preferred) or 52.8 (alternative)
e = for vlsr=94.3km/s (preferred) or 98.4km/s (alternative)
f = no embedded central point source found, a nearby extended source
with emission inside the beam is detected
g = for the near (far) kinematic solution
h = parallactic (kinematic) distance
Note (2): For the IRDCs we indicate whether or not they show embedded 24
or 70µm point sources with y(es) or n(o) (or "-" if there are no data
available).
Note (3): the four stages are:
IRDC = Infra-Red Cark Cloud stage (densities ≳105cm-3)
HMPO = High-Mass protostellar Object (accreting protostar >8M☉)
HMC = Hot Molecular Core (central source heats the surrounding environment)
UCHII = Ultra-Compact HII region (UV radiation from protostar ionizes the
surrounding gas)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 A12 --- Name Name of the source
14- 22 F9.5 deg RAdeg Right Ascension of center (J2000)
23- 31 F9.5 deg DEdeg Declination of center (J2000)
34- 38 I5 --- N [1860/20737] Number of points in spectrum
40- 44 F5.1 GHz Freq0 [92/243] Rest (median) frequency
47- 51 F5.1 km/s Vlsr [-58/122] LSR velocity of zero point
53- 58 F6.3 km/s dV [-2.5/-0.24] Velocity width
60- 65 F6.3 GHz dnu0 Lower frequency νmin-ν0
67- 72 F6.3 GHz dnu1 Upper frequency νmax-ν0
76- 80 F5.3 MHz dnu [0.19/2] Frequency resolution
82- 83 I2 Kibyte Size [11/48] FITS file size
85-101 A17 --- FileName Name of FITS file in "fits" subdirectory
103-167 A65 --- Title Title of the file
--------------------------------------------------------------------------------
Acknowledgements:
Thomas Gerner, gerner(at)mpia-hd.mpg.de
History:
* 17-Mar-2014: Fisrt on-line version
* 06-Oct-2015: Cosmetic changes in table1 presentation
(End) Patricia Vannier [CDS] 24-Jan-2014