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ZHA19 - Parallaxes for Star-forming Regions in the Inner Perseus Spiral Arm

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Short title: Zhang et al. (2019)
Authors: Zhang, BoReid, Mark J.Zhang, LianWu, YuanweiHu, BoSakai, NobuyukiMenten, Karl M.Zheng, XingwuBrunthaler, AndreasDame, Thomas M.Xu, Ye
Journal: The Astronomical Journal, Volume 157, Issue 5, article id. 200, 8 pp. (2019).
Bibcode:

Target type: High_mass_SFR
Transitions: CH3OH_6(II)

Abstract
We report trigonometric parallax and proper motion measurements of 6.7 GHz CH3OH and 22 GHz H2O masers in eight high-mass star-forming regions (HMSFRs) based on Very Long Baseline Array (VLBA) observations as part of the Bar and Spiral Structure Legacy (BeSSeL) Survey. The distances of these HMSFRs combined with their Galactic coordinates, radial velocities, and proper motions, allow us to assign them to a segment of the Perseus arm with ℓ ≲ 70�. These HMSFRs are clustered in Galactic longitude from ≈30� to ≈50� neighboring a dearth of such sources between longitudes ≈50� to ≈90�.

Abstract

We report trigonometric parallax and proper motion measurements of 6.7 GHz CH3OH and 22 GHz H2O masers in eight high-mass star-forming regions (HMSFRs) based on Very Long Baseline Array (VLBA) observations as part of the Bar and Spiral Structure Legacy (BeSSeL) Survey. The distances of these HMSFRs combined with their Galactic coordinates, radial velocities, and proper motions, allow us to assign them to a segment of the Perseus arm with ℓ ≲ 70�. These HMSFRs are clustered in Galactic longitude from ≈30� to ≈50� neighboring a dearth of such sources between longitudes ≈50� to ≈90�.

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Detection table from Zhang et al. (2019)

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ID	Obs. RA	Obs. Dec	RA offset	Dec offset	l	b	Group id	Source name	Image	Line	V_peak	F_peak	Telescope	Beam	PA	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(mas)	(mas)	(deg.)	(deg.)				CH₃OH (class II)	(km/s)	(Jy/beam)		(arcsec)	(deg.)	Yes/No		(kpc)
1	+18 50 30.7408	-00 01 59.3			32.796912	0.190827	G32.797+0.191	G032.79+00.19 (8/8)	Image	6.6 GHz (II);	4.5	4.5	VLBA	1.4 x 0.4	-18	+H₂O -CH₃OH I +CH₃OH II +OH	SFR		2012-2015
2	+19 02 39.6194	+06 59 9.052			40.425049	0.700141	G40.425+0.700	G040.42+00.70 (3/1)	Image	6.6 GHz (II);	4.6	4.6	VLBA	5.1 x 1.7	-21	+H₂O +CH₃OH II +OH	SFR		2012-2015
3	+19 06 1.6287	+06 46 36.14			40.622526	-0.138335	G40.623-0.138	G040.62-00.13 (2/2)	Image	6.6 GHz (II);	4.7	4.7	VLBA	3.9 x 2.3	13	+H₂O -CH₃OH I +CH₃OH II +OH	SFR		2012-2015
4	+19 07 28.1839	+08 10 53.435			42.034422	0.190125	G42.034+0.190	G042.03+00.19 (3/3)	Image	6.6 GHz (II);	3.1	3.1	VLBA	5.1 x 1.6	-20	+H₂O -CH₃OH I +CH₃OH II +OH	SFR		2012-2015
5	+19 20 44.8579	+14 38 26.555			49.265088	0.311125	G49.265+0.311	G049.26+00.31 (4/4)	Image	6.6 GHz (II);	3.85	3.85	VLBA	2.8 x 1.1	-8	-H₂O +CH₃OH I +CH₃OH II +OH	MIXED		2012-2015
6	+19 20 59.1958	+14 46 49.291			49.415512	0.325754	G49.416+0.326	G049.41+00.32 (5/5)	Image	6.6 GHz (II);	1.16	1.16	VLBA	5.8 x 2.3	-22	+H₂O -CH₃OH I +CH₃OH II +OH	MIXED		2012-2015
7	+20 00 54.136	+33 31 31.031			70.181149	1.741682	G70.181+1.742	G070.18+01.74(4/2)	Image	6.6 GHz (II);	3.1	3.1	VLBA	2.7 x 1.5	180	+CH₃OH II +OH	SFR		2012-2015

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(met2_data_all.ra_hms) as ra_hms,MAX(met2_data_all.dec_dms) as dec_dms,MAX(met2_data_all.source_name) as source_name,MAX(met2_data_all.ra) as ra,MAX(met2_data_all.dec) as dec,MAX(met2_data_all.l) as l,MAX(met2_data_all.b) as b,MAX(met2_data_all.grp) as grp,MAX(met2_data_all.other_name) as other_name,MAX(met2_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(met2_data_all.line) as line,MAX(met2_data_all.vrange) as vrange,MAX(met2_data_all.vpeak) as vpeak,MAX(met2_data_all.peak) as peak,MAX(met2_data_all.fwhm) as fwhm,MAX(met2_data_all.int) as int,MAX(met2_data_all.rms) as rms,MAX(met2_data_all.units) as units,MAX(met2_data_all.units_rms) as units_rms,MAX(met2_data_all.date_txt) as date_txt,MAX(met2_data_all.telescope_ref) as telescope_ref,MAX(met2_data_all.telescope_conf) as telescope_conf,MAX(met2_data_all.v_step) as v_step,MAX(met2_data_all.beam) as beam,MAX(met2_data_all.beam_maj) as beam_maj,MAX(met2_data_all.beam_min) as beam_min,MAX(met2_data_all.beam_pa) as beam_pa,MAX(met2_data_all.ref) as ref,MAX(met2_data_all.list_ref) as list_ref,MAX(met2_data_all.ascii) as ascii,MAX(met2_data_all.url) as url,MAX(met2_data_all.image) as image,MAX(met2_data_all.image2) as image2,MAX(met2_data_all.image3) as image3,MAX(met2_data_all.descr) as descr,MAX(met2_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(met2_data_all.dist) as dist,1 as dist_parallax,MAX(met2_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 met2_data_all  LEFT JOIN all_objects_withmet ON met2_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 met2_data_all.line=transitions."Line"  WHERE ref ilike 'ZHA19' AND detected=true AND hide=false GROUP BY ref

select met2_data_all.ra_hms,met2_data_all.dec_dms,met2_data_all.source_name,met2_data_all.ra,met2_data_all.dec,met2_data_all.l,met2_data_all.b,met2_data_all.grp,met2_data_all.other_name,met2_data_all.other_desc,met2_data_all.thermal,met2_data_all.line,met2_data_all.vrange,met2_data_all.vpeak,met2_data_all.peak,met2_data_all.fwhm,met2_data_all.int,met2_data_all.rms,met2_data_all.units,met2_data_all.units_rms,met2_data_all.date_txt,met2_data_all.telescope_ref,met2_data_all.telescope_conf,met2_data_all.v_step,met2_data_all.beam,met2_data_all.beam_maj,met2_data_all.beam_min,met2_data_all.beam_pa,met2_data_all.ref,met2_data_all.list_ref,met2_data_all.ascii,met2_data_all.url,met2_data_all.image,met2_data_all.image2,met2_data_all.image3,met2_data_all.descr,met2_data_all.id,met2_data_all.mjy_flag,met2_data_all.rms_mjy_flag,met2_data_all.dist,met2_data_all.dist_parallax,met2_data_all.date_txt,line_det,type,simbad_types_cat FROM met2_data_all   LEFT JOIN all_objects_withmet ON met2_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 met2_data_all.line=transitions."Line"  WHERE ref ilike 'ZHA19' AND detected=true AND hide=false ORDER BY detected DESC,id

Display data from paper

ZHA19 - Parallaxes for Star-forming Regions in the Inner Perseus Spiral Arm

Interferometry data

View as list of objects

Detection table from Zhang et al. (2019)