J/A+A/538/A137 Orion B9 dense cores maps (Miettinen+, 2012)
A (sub)millimetre study of dense cores in Orion B9.
Miettinen O., Harju J., Haikala L.K., Juvela M.
<Astron. Astrophys. 538, A137 (2012)>
=2012A&A...538A.137M 2012A&A...538A.137M
ADC_Keywords: Interstellar medium ; Molecular clouds ; Millimetric/submm sources
Keywords: astrochemistry - stars: formation - ISM: abundances - ISM: clouds -
ISM: molecules - submillimeter: ISM
Abstract:
We aim to further constrain the properties and evolutionary stages of
dense cores in Orion B9. The central part of Orion B9 was mapped at
350 micron with APEX/SABOCA. A sample of nine cores in the region were
observed in C17O(2-1), H13CO+(4-3) (towards 3 sources),
DCO+(4-3), N2H+(3-2), and N2D+(3-2) with APEX/SHFI. These
data are used in conjunction with our previous APEX/LABOCA 870-micron
dust continuum data. Many of the LABOCA cores show evidence of
substructure in the higher-resolution SABOCA image.
Description:
SABOCA 350-micron map of Orion B9 (FITS format of Fig. 2 of the
paper). The data were reduced using the CRUSH-2 software.
Objects:
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RA (2000) DE Designation(s)
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05 42 27.7 -01 20 02 Orion B9 = [CM95] Ori B9
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 92 9 Source list
fig2.fits 2880 2325 SABOCA 350-um image of the central part of
Orion B9
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name Source name
17- 18 I2 h RAh Right ascension (J2000) (1)
20- 21 I2 min RAm Right ascension (J2000) (1)
23- 26 F4.1 s RAs Right ascension (J2000) (1)
28 A1 --- DE- Declination sign (J2000) (1)
29- 30 I2 deg DEd Declination (J2000) (1)
32- 33 I2 arcmin DEm Declination (J2000) (1)
35- 36 I2 arcsec DEs Declination (J2000) (1)
38- 41 F4.1 K Tkin Gas kinematic temperature
43- 45 F3.1 K e_Tkin rms uncertainty on Tkin
47- 50 F4.1 Msun Mass Core mass
52- 54 F3.1 Msun e_Mass rms uncertainty on Mass
56- 58 F3.1 10+22cm-2 N(H2) Beam-averaged peak molecular hydrogen column
density, calculated towards the revised
LABOCA peak position by using the
temperature derived towards the line
observation target position
60- 62 F3.1 10+22cm-2 e_N(H2) rms uncertainty on N(H2)
63 A1 --- --- [/]
64- 66 F3.1 10+22cm-2 N(H2)2 Beam-averaged peak molecular hydrogen column
density, refers to the position used in
molecular-line observations
68- 70 F3.1 10+22cm-2 e_N(H2)2 rms uncertainty on N(H2)2
72- 75 F4.1 10+4cm-3 n(H2) Volume-averaged molecular hydrogen
number density
77- 79 F3.1 10+4cm-3 e_n(H2) rms uncertainty on n(H2)
81- 92 A12 --- Class Classification (2)
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Note (1): These coordinates refer to the LABOCA peak positions after adjusting
the pointing. The coordinates of our molecular-line observation target
positions can be found in Table 1 of Paper II
(Miettinen et al., 2010A&A...524A..91M 2010A&A...524A..91M).
Note (2): protostar class (0, I or "prestellar"). The virial parameter of
the starless cores SMM 5 and Ori B9 N is αvir≳2, and thus it
is unclear if they are prestellar (Paper II, Miettinen et al.,
2010A&A...524A..91M 2010A&A...524A..91M)
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Acknowledgements:
Oskari Miettinen, osmietti(at)mappi.helsinki.fi
References:
Miettinen et al., Paper I 2009A&A...500..845M 2009A&A...500..845M
Miettinen et al., Paper II 2010A&A...524A..91M 2010A&A...524A..91M
(End) Patricia Vannier [CDS] 15-Dec-2011