J/ApJS/178/302 C18O observations of multiple-core systems (Saito+, 2008)
High-resolution studies of the multiple-core systems toward cluster-forming regions including massive stars. Saito H., Saito M., Yonekura Y., Nakamura F. <Astrophys. J. Suppl. Ser. 178, 302-329 (2008)> =2008ApJS..178..302S
ADC_Keywords: Interstellar medium ; Millimetric/submm sources Keywords: ISM: clouds - ISM: molecules - ISM: structure - stars: formation open clusters and associations: general - stars: early-type Abstract: We present the results of C18O observations by the Nobeyama Millimeter Array toward dense clumps with radii of ∼0.3pc in six cluster-forming regions including massive (proto) stars. We identified 171 cores, whose radius, line width, and molecular mass range from 0.01 to 0.09pc, 0.43 to 3.33km/s, and 0.5 to 54.1M☉, respectively. Many cores with various line widths exist in one clump, and the index of the line width-radius relationship of the cores and the parental clump differs from core to core in the clump. This indicates that the degree of dissipation of the turbulent motion varies for each core in one clump. Description: The observations were carried out from 2002 November through 2005 May with the six-element Nobeyama Millimeter Array (NMA) in the C18O (J=1-0 ; 109.782GHz) line and 98110GHz continuum bands. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 67 182 Observed properties of C18O cores table5.dat 64 171 Derived properties of C18O cores
See also: J/MNRAS/391/869 : A mapping survey of massive CO cores (Guan+, 2008) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 14 A14 --- Region Source region 16- 19 A4 --- --- [core] 21- 22 A2 --- Core Core identification (G1) 24- 25 I2 h RAh ? Hour of Right Ascension (J2000) (1) 27- 28 I2 min RAm ? Minute of Right Ascension (J2000)(1) 30- 33 F4.1 s RAs ? Second of Right Ascension (J2000) (1) 34 A1 --- DE- Declination sign (J2000) (1) 35- 36 I2 deg DEd ? Degree of Declination (J2000) (1) 38- 39 I2 arcmin DEm ? Arcminute of Declination (J2000) (1) 41- 42 I2 arcsec DEs ? Arcsecond of Declination (J2000) (1) 44- 46 F3.1 K T*R Absolute peak temperature (2) 48- 52 F5.1 km/s VLSR Local Standard of Rest radial velocity (2) 54- 57 F4.2 km/s dV Full-Width at Half-Maximum of line (2) 59- 62 F4.2 km/s dVc ? Composite line width (3) 64- 67 F4.1 K.km/s intT*R Integrated intensity peak
Note (1): Position of the integrated intensity peak of C18O cores. Note (2): The parameters are derived from a Gaussian fitting for the line profile at the integrated intensity peak of C18O cores. Note (3): The line width of composite spectrum made using the data within the cores.
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 14 A14 --- Region Source region 16- 17 I2 K Tex Excitation temperature 19- 22 A4 --- --- [core] 24- 25 A2 --- Core Core identification (G1) 27- 30 F4.1 10+22cm-2 N(H2) H_2_ column density (1) 32- 36 F5.3 pc Rcore Core radius 38- 41 F4.1 solMass Mcore LTE core mass 43- 47 F5.1 solMass Mvir ? Core virial mass 49 A1 --- f_Mvir [e] Mvir not estimated (2) 51- 54 F4.1 10+5cm-3 n(H2)c ? Average H2 density over core 56 A1 --- f_n(H2)c [e] n(H2)c not estimated (2) 58 A1 --- MCS Name of associated millimeter continuum source 60 A1 --- NIR Number of associated 2MASS source 62 A1 --- f_NIR [f] foreground source (3) 64 A1 --- CCS Number of associated centimeter continuum source
Note (1): at the intensity peak of cores. Note (2): 'e' when values not derived since the radius has a large error. Note (3): 'f' when source seems to be foreground (see text).
Global notes: Note (G1): Sources identified as [SSY2008] IRAS HHMMm+DDMM Core AA in Simbad.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 27-Jul-2009
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