Display data from paper

Select data type: ,

ELL18 - The first high-resolution observations of 37.7-, 38.3-, and 38.5-GHz methanol masers

Interferometry data

Short title: Ellingsen et al. (2018)
Authors: Ellingsen, S. P. Voronkov, M. A. Breen, S. L. Caswell, J. L. Sobolev, A. M.
Journal: Monthly Notices of the Royal Astronomical Society, Volume 480, Issue 4, p.4851-4872
Bibcode:

Target type: High_mass_SFR
Transitions: CH3OH_36(I),CH3OH_84(I),CH3OH_95(I),CH3OH_37(II),CH3OH_38(II)

Abstract
We have used the Australia Telescope Compact Array (ATCA) to undertake the first high-angular-resolution observations of 37.7-GHz (7_-2 --> 8_-1E) methanol masers towards a sample of 11 high-mass star formation regions which host strong 6.7-GHz methanol masers. The 37.7-GHz methanol sites are coincident to within the astrometric uncertainty (0.4 arcsec) with the 6.7-GHz methanol masers associated with the same star formation region. However, spatial and spectral comparison of the 6.7- and 37.7-GHz maser emission within individual sources shows that the 37.7-GHz masers are less often, or to a lesser degree co-spatial than are the 12.2-GHz and 6.7-GHz masers. We also made sensitive, high-angular-resolution observations of the 38.3- and 38.5-GHz class II methanol transitions (6₂ --> 5₃A^- and 6₂ --> 5₃A⁺, respectively) and the 36.2-GHz (4_-1 --> 3₀E) class I methanol transition towards the same sample of 11 sources. The 37.7-, 38.3-, and 38.5-GHz methanol masers are unresolved in the current observations, which implies a lower limit on the brightness temperature of the strongest masers of more than 10⁶ K. We detected the 38.3-GHz methanol transition towards seven sources, five of which are new detections and detected the 38.5-GHz transition towards six sources, four of which are new detections. We detected 36.2-GHz class I methanol masers towards all 11 sources, 6 of these are new detections for this transition, of which 4 sources do not have previously reported class I methanol masers from any transition. eprintid: arXiv:1808.02143

Abstract

We have used the Australia Telescope Compact Array (ATCA) to undertake the first high-angular-resolution observations of 37.7-GHz (7_-2 --> 8_-1E) methanol masers towards a sample of 11 high-mass star formation regions which host strong 6.7-GHz methanol masers. The 37.7-GHz methanol sites are coincident to within the astrometric uncertainty (0.4 arcsec) with the 6.7-GHz methanol masers associated with the same star formation region. However, spatial and spectral comparison of the 6.7- and 37.7-GHz maser emission within individual sources shows that the 37.7-GHz masers are less often, or to a lesser degree co-spatial than are the 12.2-GHz and 6.7-GHz masers. We also made sensitive, high-angular-resolution observations of the 38.3- and 38.5-GHz class II methanol transitions (6₂ --> 5₃A^- and 6₂ --> 5₃A⁺, respectively) and the 36.2-GHz (4_-1 --> 3₀E) class I methanol transition towards the same sample of 11 sources. The 37.7-, 38.3-, and 38.5-GHz methanol masers are unresolved in the current observations, which implies a lower limit on the brightness temperature of the strongest masers of more than 10⁶ K. We detected the 38.3-GHz methanol transition towards seven sources, five of which are new detections and detected the 38.5-GHz transition towards six sources, four of which are new detections. We detected 36.2-GHz class I methanol masers towards all 11 sources, 6 of these are new detections for this transition, of which 4 sources do not have previously reported class I methanol masers from any transition. eprintid:

Download as: Table (CSV)
View as list of objects

Detection table from Ellingsen et al. (2018)

Export table to csv

Hide / Show individual components

ID	Obs. RA	Obs. Dec	RA offset	Dec offset	l	b	Group id	#	Source name	Image	Line	V_peak	F_peak	∫F dv	Telescope	RMS	Beam	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(mas)	(mas)	(deg.)	(deg.)					CH₃OH (class I)	(km/s)	(Jy)	(Jy*km/s)		(mJy)	(arcsec)	Yes/No		(kpc)
1	+15 00 55.4	-58 58 53			318.947837	-0.196235	G318.948-0.196		G318.948-0.196	Image	36 GHz (I);	-36	2.9	..	ATCA	21.000	3 x 5	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2011 March 24
	+15 00 55.32	-58 58 56.7	-1198.8 mas	-3699.6 mas	318.947196	-0.197057		1	G318.948-0.196			-36	2.9
2	+15 31 45.6	-56 30 50			323.740419	-0.262809	G323.740-0.263		G323.740-0.263	Image	36 GHz (I);	-50	0.7	..	ATCA	23.000	3 x 5	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		2011 March 24
	+15 31 46.09	-56 30 57.6	7350 mas	-7599.6 mas	323.740133	-0.265185		1	G323.740-0.263			-50	0.7
3	+16 38 29.7	-47 00 35			337.705531	-0.053136	G337.705-0.053		G337.705-0.053	Image	36 GHz (I);	-46	3.6	..	ATCA	23.000	3 x 5	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2011 March 24
	+16 38 29.15	-47 00 29.5	-8250 mas	5499.2 mas	337.705625	-0.050953		1	G337.705-0.053			-46	3.6
4	+16 52 4.8	-46 08 34			339.884285	-1.259046	G339.884-1.259		G339.884-1.259	Image	36 GHz (I);	-31.8	1.3	..	ATCA	23.000	3 x 5	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2011 March 24
	+16 52 5.48	-46 08 40.9	10200 mas	-6899.2 mas	339.884053	-1.261780		1	G339.884-1.259			-31.8	1.3
5	+16 50 14.8	-44 42 25			340.785232	-0.095642	G340.785-0.096		G340.785-0.096	Image	36 GHz (I);	-100.3	0.7	..	ATCA	23.000	3 x 5	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2011 March 24
	+16 50 15.21	-44 42 34.1	6148.8 mas	-9101.6 mas	340.784066	-0.098193		1	G340.785-0.096			-100.3	0.7
6	+16 56 47.7	-40 14 26			345.009689	1.792085	G345.010+1.792		G345.010+1.792	Image	36 GHz (I);	-13	11.7	..	ATCA	23.000	3 x 5	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2011 March 24
	+16 56 46.06	-40 14 19.2	-24600 mas	6801.6 mas	345.007908	1.797340		1	G345.010+1.792			-13	11.7
7	+17 20 4.1	-38 58 30			348.704017	-1.043601	G348.720-1.039		G348.703-1.043	Image	36 GHz (I);	-13	1.8	..	ATCA	25.000	3 x 5	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2011 March 24
	+17 20 3.03	-38 58 29.1	-16048.8 mas	900 mas	348.702240	-1.040615		1	G348.703-1.043			-13	1.8
8	+17 20 53.4	-35 47 00			351.417209	0.645356	G351.417+0.645		NGC6334F	Image	36 GHz (I);	-8	8.9	..	ATCA	27.000	3 x 5	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		2011 March 24
	+17 20 49.79	-35 46 49	-54150 mas	10998.8 mas	351.412760	0.657122		1	NGC6334F			-8	8.9
9	+18 06 14.8	-20 31 32			9.62137	0.195276	G9.621+0.195		G9.621+0.196		36 GHz (I);	3.8	1.1	..	ATCA	27.000	3 x 5	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2011 March 24
	+18 06 15.29	-20 31 39	7348.8 mas	-6998.4 mas	9.620606	0.192658		1	G9.621+0.196			3.8	1.1
10	+18 34 39.2	-08 31 24			23.440246	-0.182208	G23.437-0.184		G23.440-0.182		36 GHz (I);	102.8	25.4	..	ATCA	30.000	3 x 5	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2011 March 24
	+18 34 38.44	-08 31 27.8	-11398.8 mas	-3801.2 mas	23.437866	-0.179915		1	G23.440-0.182			102.8	25.4
11	+19 01 45.5	+01 13 29			35.199275	-1.736815	G35.200-1.737		G35.201-1.736		36 GHz (I);	42	1.2	..	ATCA	30.000	3 x 5	+H₂O +CH₃OH I +CH₃OH II +OH	SFR_MIXED		2011 March 24
	+19 01 42.43	+01 13 43.3	-46048.8 mas	14300.8 mas	35.196964	-1.723624		1	G35.201-1.736			42	1.2

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 'ELL18' 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 'ELL18' AND detected=true AND hide=false ORDER BY detected DESC,id

Display data from paper

ELL18 - The first high-resolution observations of 37.7-, 38.3-, and 38.5-GHz methanol masers

Interferometry data

View as list of objects

Detection table from Ellingsen et al. (2018)