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BRO97 - Observations of ground-state OH in the Large Magellanic Cloud

Short title: Brooks & Whiteoak (1997)
Authors: Brooks, K. J.Whiteoak, J. B.
Journal: Monthly Notices of the Royal Astronomical Society, Volume 291, Issue 3, pp. 395-402.
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Target type: HII,Extragalactic
Observations category: SF.general
Facility type: interferometer
Transitions: OH_1665,OH_1667

Abstract
We have carried out a series of observations of the 1665- and 1667-MHz transitions of the ^2II_3/2,J=3/2 OH ground state towards six selected HII regions in the Large Magellanic Cloud (IRAS 05011-6815 and MRC 0510-689, 0513-694B, 0539-691, 0540-696B, 0540-697A) using the Australia Telescope Compact Array. The study has provided the first accurate positions for known 1665- and 1667-MHz OH masers as well as detecting several new masers. The regions all contain H_2O or CH_3OH masers but OH masers were detected in only four. The 1.6-GHz continuum emission was also imaged to investigate its spatial relationship to the associated OH maser. Although some masers are close to compact continuum components, in other cases they are near the continuum distribution boundaries and perhaps have been created as a result of the HII region interacting with the surrounding interstellar medium.

Abstract

We have carried out a series of observations of the 1665- and 1667-MHz transitions of the ^2II_3/2,J=3/2 OH ground state towards six selected HII regions in the Large Magellanic Cloud (IRAS 05011-6815 and MRC 0510-689, 0513-694B, 0539-691, 0540-696B, 0540-697A) using the Australia Telescope Compact Array. The study has provided the first accurate positions for known 1665- and 1667-MHz OH masers as well as detecting several new masers. The regions all contain H_2O or CH_3OH masers but OH masers were detected in only four. The 1.6-GHz continuum emission was also imaged to investigate its spatial relationship to the associated OH maser. Although some masers are close to compact continuum components, in other cases they are near the continuum distribution boundaries and perhaps have been created as a result of the HII region interacting with the surrounding interstellar medium.

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Detection table from Brooks & Whiteoak (1997)

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ID	Obs. RA	Obs. Dec	l	b	Group id	grpv	Source name	Image	Descr.	Line	Frequency	V_peak	F_peak	Telescope	V_step	RMS	Beam	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(deg.)	(deg.)						OH	(MHz)	(km/s)	(Jy)		(km/s)	(mJy/beam)	(arcsec)	Yes/No		(kpc)
1	05 01 1.9	-68 10 28.5	279.1502	-35.2119	G279.150-35.212	G279.1502-35.2120	IRAS 05011	Image	Descr	1665 MHz;	1665	267.6	230	ATCA	0.35	0.500	7 x 3.4	+H₂O +OH	SFR_MIXED		1994 Mar - 1996 Nov
2	05 01 1.9	-68 10 28.1	279.1501	-35.2119	G279.150-35.212	G279.1502-35.2120	IRAS 05011	Image		1667 MHz;	1667	266.2	129	ATCA	0.35	0.500	7 x 3.4	+H₂O +OH	SFR_MIXED		1994 Mar - 1996 Nov
3	05 09 51.9	-68 53 28.5	279.7527	-34.2520	G279.753-34.252	G279.7527-34.2519	MRC 0510-689 (MC23 N105a)	Image		1665 MHz;	1665	253.4	580	ATCA	0.35	0.500	7 x 3.4	+H₂O -CH₃OH I +OH	SFR_MIXED		1994 Mar - 1996 Nov
4	05 09 52.2	-68 53 28.7	279.7527	-34.2516	G279.753-34.252	G279.7527-34.2519	MRC 0510-689 (MC23 N105a)	Image		1665 MHz;	1665	255.8	90	ATCA	0.35	0.500	7 x 3.4	+H₂O -CH₃OH I +OH	SFR_MIXED		1994 Mar - 1996 Nov
5	05 09 52	-68 52 28.6	279.7331	-34.2558	G279.731-34.257	G279.7331-34.2558	MRC 0510-689 (MC23 N105a)	Image	Descr	1667 MHz;	1667	254.2	248	ATCA	0.35	0.500	7 x 3.4				1994 Mar - 1996 Nov
6	05 13 25.2	-69 22 46	280.2396	-33.8329	G280.237-33.837	G280.2395-33.8329	MRC 0513-694B (MC24 N113)	Image	Descr	1665 MHz;	1665	248.3	257	ATCA	0.35	0.500	7 x 3.4	+OH			1994 Mar - 1996 Nov
7	05 39 37.6	-69 45 25.9	280.2195	-31.5159	G280.220-31.516	G280.2195-31.5159	MRC 0540-697A (MC77 N159)	Image	Descr	1667 MHz;	1667	254.9	-0.3	ATCA	0.35	0.500	7 x 3.4	+OH			1994 Mar - 1996 Nov

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(oh_data_all.ra_hms) as ra_hms,MAX(oh_data_all.dec_dms) as dec_dms,MAX(oh_data_all.source_name) as source_name,MAX(oh_data_all.ra) as ra,MAX(oh_data_all.dec) as dec,MAX(oh_data_all.l) as l,MAX(oh_data_all.b) as b,MAX(oh_data_all.grp) as grp,MAX(oh_data_all.grpv) as grpv,MAX(oh_data_all.other_name) as other_name,MAX(oh_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(oh_data_all.line) as line,MAX(oh_data_all.freq) as freq,MAX(oh_data_all.pol) as pol,MAX(oh_data_all.vrange) as vrange,MAX(oh_data_all.vpeak) as vpeak,MAX(oh_data_all.peak) as peak,MAX(oh_data_all.fwhm) as fwhm,MAX(oh_data_all.int) as int,MAX(oh_data_all.rms) as rms,MAX(oh_data_all.units) as units,MAX(oh_data_all.units_rms) as units_rms,MAX(oh_data_all.date_txt) as date_txt,MAX(oh_data_all.telescope_ref) as telescope_ref,MAX(oh_data_all.telescope_conf) as telescope_conf,MAX(oh_data_all.v_step) as v_step,MAX(oh_data_all.beam) as beam,MAX(oh_data_all.beam_maj) as beam_maj,MAX(oh_data_all.beam_min) as beam_min,MAX(oh_data_all.beam_pa) as beam_pa,MAX(oh_data_all.ref) as ref,MAX(oh_data_all.list_ref) as list_ref,MAX(oh_data_all.ascii) as ascii,MAX(oh_data_all.url) as url,MAX(oh_data_all.image) as image,MAX(oh_data_all.image2) as image2,MAX(oh_data_all.image3) as image3,MAX(oh_data_all.descr) as descr,MAX(oh_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(oh_data_all.dist) as dist,1 as dist_parallax,MAX(oh_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 oh_data_all  LEFT JOIN all_objects_withmet ON oh_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 oh_data_all.line=transitions."Line"  WHERE ref ilike 'BRO97' AND detected=true AND hide=false GROUP BY ref

select oh_data_all.ra_hms,oh_data_all.dec_dms,oh_data_all.source_name,oh_data_all.ra,oh_data_all.dec,oh_data_all.l,oh_data_all.b,oh_data_all.grp,oh_data_all.grpv,oh_data_all.other_name,oh_data_all.other_desc,oh_data_all.thermal,oh_data_all.line,oh_data_all.freq,oh_data_all.pol,oh_data_all.vrange,oh_data_all.vpeak,oh_data_all.peak,oh_data_all.fwhm,oh_data_all.int,oh_data_all.rms,oh_data_all.units,oh_data_all.units_rms,oh_data_all.date_txt,oh_data_all.telescope_ref,oh_data_all.telescope_conf,oh_data_all.v_step,oh_data_all.beam,oh_data_all.beam_maj,oh_data_all.beam_min,oh_data_all.beam_pa,oh_data_all.ref,oh_data_all.list_ref,oh_data_all.ascii,oh_data_all.url,oh_data_all.image,oh_data_all.image2,oh_data_all.image3,oh_data_all.descr,oh_data_all.id,oh_data_all.mjy_flag,oh_data_all.rms_mjy_flag,oh_data_all.dist,oh_data_all.dist_parallax,oh_data_all.date_txt,line_det,type,simbad_types_cat FROM oh_data_all   LEFT JOIN all_objects_withmet ON oh_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 oh_data_all.line=transitions."Line"  WHERE ref ilike 'BRO97' AND detected=true AND hide=false ORDER BY detected DESC,id

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BRO97 - Observations of ground-state OH in the Large Magellanic Cloud

View as list of objects

Detection table from Brooks & Whiteoak (1997)