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NAK86 - Molecular line observations of the S235B region

Short title: Nakano & Yoshida (1986)
Authors: Nakano, Makoto Yoshida, Shigeomi
Journal: Astronomical Society of Japan, Publications (ISSN 0004-6264), vol. 38, no. 4, 1986, p. 531-545. Research supported by the Japan Society for the Promotion of Science.
Bibcode:

Target type: High_mass_SFR
Transitions: CH3OH_95(I)

Abstract
The core of the molecular cloud associated with the young stellar object S235B has been observed in molecular lines of CS, CO, and CH3OH with high angular resolution by the 45-m radio telescope of the Nobeyama Radio Observatory. The core is 0.6 x 1.0 pc in extent. The number density of molecular hydrogen and the fractional abundance of CS relative to molecular hydrogen are estimated to be 300,000/cu cm and 5 x 10 to the -10th, respectively. The CO observations show evidence of bipolar flow. This suggests that S235B is not a compact H II region but an expanding ionized envelope around a young star. The mass-loss rate from S235B is estimated as 10 to the -6th solar mass/yr. CH3OH emission shows a very compact distribution and a narrow line width, suggesting that the methanol lines are weakly masing.

Abstract

The core of the molecular cloud associated with the young stellar object S235B has been observed in molecular lines of CS, CO, and CH3OH with high angular resolution by the 45-m radio telescope of the Nobeyama Radio Observatory. The core is 0.6 x 1.0 pc in extent. The number density of molecular hydrogen and the fractional abundance of CS relative to molecular hydrogen are estimated to be 300,000/cu cm and 5 x 10 to the -10th, respectively. The CO observations show evidence of bipolar flow. This suggests that S235B is not a compact H II region but an expanding ionized envelope around a young star. The mass-loss rate from S235B is estimated as 10 to the -6th solar mass/yr. CH3OH emission shows a very compact distribution and a narrow line width, suggesting that the methanol lines are weakly masing.

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Detection table from Nakano & Yoshida (1986)

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ID	Obs. RA	Obs. Dec	l	b	Group id	Other name	Line	V_peak	FWHM	List	Beam	Detection	Class	Dist. (parallax)	Ref.
	(J2000)	(J2000)	(deg.)	(deg.)		Comp	CH₃OH (class I)	(km/s)	(km/s)		(arcsec)	Yes/No		(kpc)
1	05 40 53.5	+35 41 38.8	173.7215	2.6971	G173.719+2.698	max	95 GHz (I);	-16.5	0.7	AVE02	20	+H₂O +CH₃OH I +CH₃OH II -OH	SFR_MIXED		NAK86
	05 40 53.5	+35 41 38.8	173.7215	2.6971	G173.719+2.698	max	95 GHz (I);	-17.5		AVE02	20	+H₂O +CH₃OH I +CH₃OH II -OH	SFR_MIXED		NAK86

DSS colored	2MASS colored	WISE colored
SDSS color	IRAC color I1,I2,I4	GLIMPSE 360
PACS color (70-160 um)	SPIRE color (250-500 um)	NVSS (1.4GHz)
ATLASGAL 870 um	ATLASGAL 870 um + Planck	Bolocam 1.1 mm
UKIDSS K Download UKIDSS K FITS	2MASS K Download 2MASS K FITS

select MAX(met1_data_all.ra_hms) as ra_hms,MAX(met1_data_all.dec_dms) as dec_dms,MAX(met1_data_all.source_name) as source_name,MAX(met1_data_all.ra) as ra,MAX(met1_data_all.dec) as dec,MAX(met1_data_all.l) as l,MAX(met1_data_all.b) as b,MAX(met1_data_all.grp) as grp,MAX(met1_data_all.other_name) as other_name,MAX(met1_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(met1_data_all.line) as line,MAX(met1_data_all.vrange) as vrange,MAX(met1_data_all.vpeak) as vpeak,MAX(met1_data_all.peak) as peak,MAX(met1_data_all.fwhm) as fwhm,MAX(met1_data_all.int) as int,MAX(met1_data_all.rms) as rms,MAX(met1_data_all.units) as units,MAX(met1_data_all.units_rms) as units_rms,MAX(met1_data_all.date_txt) as date_txt,MAX(met1_data_all.telescope_ref) as telescope_ref,MAX(met1_data_all.telescope_conf) as telescope_conf,MAX(met1_data_all.v_step) as v_step,MAX(met1_data_all.beam) as beam,MAX(met1_data_all.beam_maj) as beam_maj,MAX(met1_data_all.beam_min) as beam_min,MAX(met1_data_all.beam_pa) as beam_pa,MAX(met1_data_all.ref) as ref,MAX(met1_data_all.list_ref) as list_ref,MAX(met1_data_all.ascii) as ascii,MAX(met1_data_all.url) as url,MAX(met1_data_all.image) as image,MAX(met1_data_all.image2) as image2,MAX(met1_data_all.image3) as image3,MAX(met1_data_all.descr) as descr,MAX(met1_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(met1_data_all.dist) as dist,1 as dist_parallax,MAX(met1_data_all.date_txt) as date_txt,MAX(line_det) as line_det,MAX(type) as type,MAX(simbad_types_cat) as simbad_types_cat FROM met1_data_all  LEFT JOIN all_objects_withmet ON met1_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' LEFT JOIN transitions ON met1_data_all.line=transitions."Line"  WHERE ref ilike 'NAK86' AND detected=true AND hide=false GROUP BY ref

select met1_data_all.ra_hms,met1_data_all.dec_dms,met1_data_all.source_name,met1_data_all.ra,met1_data_all.dec,met1_data_all.l,met1_data_all.b,met1_data_all.grp,met1_data_all.other_name,met1_data_all.other_desc,met1_data_all.thermal,met1_data_all.line,met1_data_all.vrange,met1_data_all.vpeak,met1_data_all.peak,met1_data_all.fwhm,met1_data_all.int,met1_data_all.rms,met1_data_all.units,met1_data_all.units_rms,met1_data_all.date_txt,met1_data_all.telescope_ref,met1_data_all.telescope_conf,met1_data_all.v_step,met1_data_all.beam,met1_data_all.beam_maj,met1_data_all.beam_min,met1_data_all.beam_pa,met1_data_all.ref,met1_data_all.list_ref,met1_data_all.ascii,met1_data_all.url,met1_data_all.image,met1_data_all.image2,met1_data_all.image3,met1_data_all.descr,met1_data_all.id,met1_data_all.mjy_flag,met1_data_all.rms_mjy_flag,met1_data_all.dist,met1_data_all.dist_parallax,met1_data_all.date_txt,line_det,type,simbad_types_cat FROM met1_data_all   LEFT JOIN all_objects_withmet ON met1_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' LEFT JOIN transitions ON met1_data_all.line=transitions."Line"  WHERE ref ilike 'NAK86' AND detected=true AND hide=false ORDER BY detected DESC,id

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NAK86 - Molecular line observations of the S235B region

View as list of objects

Detection table from Nakano & Yoshida (1986)