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BAR71 - Detection of Methyl Alcohol in Orion at a Wavelength of ~1 Centimeter

Short title: Barrett et al. (1971)
Authors: Barrett, A. H. Schwartz, P. R. Waters, J. W.
Journal: Astrophysical Journal, vol. 168, p.L101
Bibcode:
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Target type: First_detection
Transitions: CH3OH_25-30_GHz(I)

Abstract

Five transitions of CH3OH, corresponding to the J = 4, 5, 6, 7, and 8 rotational levels, at frequencies of approximately 25 GHz, have been detected in Orion A. The source of emission is less than 1 arc minute in angular size and appears to be coincident with the infrared nebula. Although departures from LTE are evident in the line intensities, if the emission originates in the infrared nebula then a temperature of 90� K, a column density of 10^16 CH3OH molecules per cm2, and a CH3OH density of 0.25 molecules per cm3 are indicated. Collisional excitation requires a total gas density of 2 x 10^6 cm-3 and a total mass of gas in excess of 20 M_sol

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Detection table from Barrett et al. (1971)

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ID	Obs. RA	Obs. Dec	l	b	Group id	grpv	Source name	Line	T_a	Telescope	Beam	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(deg.)	(deg.)				CH₃OH (class I)	(K)		(arcsec)	Yes/No		(kpc)
1	05 35 15.5	-05 22 26.6	208.9940	-19.3806	G208.993-19.385	G208.9928-19.3847	Orion	24.933 GHz (I);	1.0 (0.2)	HAYS	78	+H₂O +CH₃OH I +CH₃OH II +OH +SiO	SFR_MIXED		April-May 1971
2	05 35 15.5	-05 22 26.6	208.9940	-19.3806	G208.993-19.385	G208.9928-19.3847	Orion	24.959 GHz (I);	1.1 (0.2)	HAYS	78	+H₂O +CH₃OH I +CH₃OH II +OH +SiO	SFR_MIXED		April-May 1971
3	05 35 15.5	-05 22 26.6	208.9940	-19.3806	G208.993-19.385	G208.9928-19.3847	Orion	25.0 GHz (I);	1.7 (0.2)	HAYS	78	+H₂O +CH₃OH I +CH₃OH II +OH +SiO	SFR_MIXED		April-May 1971
4	05 35 15.5	-05 22 26.6	208.9940	-19.3806	G208.993-19.385	G208.9928-19.3847	Orion	25.1 GHz (I);	1.5 (0.2)	HAYS	78	+H₂O +CH₃OH I +CH₃OH II +OH +SiO	SFR_MIXED		April-May 1971
5	05 35 15.5	-05 22 26.6	208.9940	-19.3806	G208.993-19.385	G208.9928-19.3847	Orion	25.2 GHz (I);	0.7 (0.2)	HAYS	78	+H₂O +CH₃OH I +CH₃OH II +OH +SiO	SFR_MIXED		April-May 1971

Non-detection table from Barrett et al. (1971)

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ID	Obs. RA	Obs. Dec	l	b	Group id	grpv	Source name	Line	Telescope	RMS	Beam	Detection	Class	Date
	(J2000)	(J2000)	(deg.)	(deg.)				CH₃OH (class I)		(K)	(arcsec)	Yes/No
1	02 09 26.1	+76 09 19	127.6539	14.0037	G127.654+14.004	G127.6539+14.0037	Cloud 127.7	25.1 GHz (I);	HAYS	1.000	78	-CH₃OH I		April-May 1971
2	02 25 38.4	+62 05 43.2	133.7118	1.2115	G133.715+1.215	G133.7119+1.2112	W3	25.1 GHz (I);	HAYS	2.000	78	+H₂O -CH₃OH I +CH₃OH II +OH	SFR_MIXED	April-May 1971
3	02 27 4.4	+61 52 21.6	133.9487	1.0638	G133.947+1.064	G133.9475+1.0642	W3 OH	25.1 GHz (I);	HAYS	1.000	78	+H₂O +CH₃OH I +CH₃OH II +OH	SFR	April-May 1971
4	04 41 35.5	+25 24 5.5	174.5895	-13.6451	G174.590-13.645	G174.5895-13.6451	Cloud 2	25.1 GHz (I);	HAYS	1.000	78	-CH₃OH I		April-May 1971
5	05 11 19.7	+52 52 27.7	156.4395	7.8347	G156.438+7.835	G156.4377+7.8350	IRC 50137	25.1 GHz (I);	HAYS	1.000	78	+H₂O -CH₃OH I +OH +SiO	EVOLVED	April-May 1971
6	07 22 56.6	-25 46 14.6	239.3524	-5.0727	G239.352-5.065	G239.3524-5.0727	VY CMa	25.1 GHz (I);	HAYS	0.800	78	+H₂O -CH₃OH I -CH₃OH II +OH +SiO	EVOLVED	April-May 1971
7	09 48 0.5	+13 16 38.7	221.4559	45.0711	G221.445+45.058	G221.4559+45.0711	IRC+10216	25.1 GHz (I);	HAYS	1.000	78	+H₂O -CH₃OH I -OH	EVOLVED	April-May 1971
8	10 16 3.3	+30 34 26	197.7116	55.9682	G197.715+55.964	G197.7116+55.9682	CIT-6	25.1 GHz (I);	HAYS	1.000	78	-H₂O -CH₃OH I -OH +SiO	EVOLVED	April-May 1971
9	14 24 12.9	+25 42 21	34.2853	69.2084	G34.278+69.213	G34.2853+69.2084	RX Boo	25.1 GHz (I);	HAYS	0.800	78	+H₂O -CH₃OH I +OH +SiO	EVOLVED	April-May 1971
10	17 45 38.7	-28 59 39.7	359.9532	-0.0350	G359.9518-0.0357	G359.9532-0.0359	Sgr A	25.1 GHz (I);	HAYS	0.600	78	-H₂O -CH₃OH I +SiO		April-May 1971
11	17 47 20.9	-28 24 50.2	0.6431	-0.0525	G0.6431-0.0525	G0.6431-0.0525	Sgr B2	25.1 GHz (I);	HAYS	0.400	78	-CH₃OH I	SFR	April-May 1971
12	17 47 20.8	-28 23 32.2	0.6615	-0.0412	G0.6577-0.0420	G0.6577-0.0420		25.1 GHz (I);	HAYS	0.600	78	+H₂O -CH₃OH I +CH₃OH II +OH	SFR	April-May 1971
13	19 06 22.6	+08 13 47.2	41.9528	0.4527	G41.952+0.454	G41.9524+0.4540	R Aql	25.1 GHz (I);	HAYS	1.000	78	+H₂O -CH₃OH I +OH +SiO	EVOLVED	April-May 1971
14	19 10 13.6	+09 06 17.4	43.1679	0.0110	G43.166+0.011	G43.1669+0.0106	W49 (N)	25.1 GHz (I);	HAYS	0.800	78	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED	April-May 1971
15	19 23 44.7	+14 30 23.5	49.4885	-0.3916	G49.489-0.385	G49.4897-0.3876	W51	25.1 GHz (I);	HAYS	0.800	78	+H₂O +CH₃OH I +CH₃OH II +OH -SiO	SFR_MIXED	April-May 1971
16	20 46 25.7	+40 06 56.4	80.7980	-1.9219	G80.798-1.921	G80.7982-1.9208	NML Cyg	25.1 GHz (I);	HAYS	1.000	78	+H₂O -CH₃OH I -CH₃OH II +OH +SiO	UNK	April-May 1971
17	22 36 51.1	+75 14 3.9	114.5410	14.6017	G114.541+14.602	G114.5410+14.6017	Cloud 114	25.1 GHz (I);	HAYS	1.000	78	-CH₃OH I	SFR	April-May 1971
18	23 23 27.8	+58 49 8.5	111.7438	-2.1285	G111.747-2.110	G111.7438-2.1285	Cas A	25.1 GHz (I);	HAYS	1.000	78	-H₂O -CH₃OH I -CH₃OH II	SFR	April-May 1971

X

DSS colored	2MASS colored	WISE colored
PACS color (70-160 um)	SPIRE color (250-500 um)	GLIMPSE 360
SDSS color	IRAC color I1,I2,I4	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.grpv) as grpv,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 'BAR71' 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.grpv,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 'BAR71' AND detected=true AND hide=false ORDER BY detected DESC,id