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JOH14 - Detection of Water Masers toward Young Stellar Objects in the Large Magellanic Cloud
Interferometry data
Short title
: Johanson et al. (2014)
Authors
: Johanson, A. K.Migenes, V.Breen, S. L.
Journal
: The Astrophysical Journal, Volume 781, Issue 2, article id. 78,
6
pp. (2014).
Bibcode
:
2014ApJ...781...78J
Target type
: YSO,Extragalactic
Transitions
: H2O_22
Abstract
We present results from a search for water maser emission toward N4A, N190, and N206, three regions of massive star formation in the Large Magellanic Cloud (LMC). Four water masers were detected two toward N4A, and two toward N190. In the latter region, no previously known maser emission has been reported. Future studies of maser proper motion to determine the galactic dynamics of the LMC will benefit from the independent data points the new masers in N190 provide. Two of these masers are associated with previously identified massive young stellar objects (YSOs), which strongly supports the authenticity of the classification. We argue that the other two masers identify previously unknown YSOs. No masers were detected toward N206, but it does host a newly discovered 22 GHz continuum source, also associated with a massive YSO. We suggest that future surveys for water maser emission in the LMC be targeted toward the more luminous, massive YSOs.
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Table (CSV)
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Detection table from Johanson et al. (2014)
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individual components
ID
Obs. RA
Obs. Dec
RA offset
Dec offset
l
b
Group id
#
Source name
Image
Descr.
Line
V
peak
F
peak
Telescope
Configuration
V
step
RMS
Detection
Class
Dist. (parallax)
Date
(J2000)
(J2000)
(mas)
(mas)
(deg.)
(deg.)
H
2
O
(km/s)
(mJy/beam)
(km/s)
(mJy/beam)
Yes
/
No
(kpc)
1
+04 52 9.1
-66 55 14.8
277.947922
-36.369191
G277.949-36.371
N4A
Image
Descr
22 GHz
;
258.4 .. 272.5
230 .. 431
ATCA
1.5D
0.224
7.000
+H
2
O
-OH
MIXED
2008 Mar
+04 52 5.24
-66 55 13.9
-57901.2 mas
900.8 mas
277.949847
-36.375307
1
N4A
262.5
230 (15)
+04 52 9.05
-66 55 22.5
-751.2 mas
-7699.2 mas
277.950498
-36.368662
2
N4A
259.9
261 (10)
+04 52 9.07
-66 55 22.6
-451.2 mas
-7799.2 mas
277.950520
-36.368623
3
N4A
258.4
431 (30)
+04 52 9.21
-66 55 22.2
1648.8 mas
-7399.2 mas
277.950307
-36.368435
4
N4A
272.5
275 (24)
2
+05 04 25.4
-70 43 49.2
282.048707
-34.239427
G282.046-34.240
N190
Image
Descr
22 GHz
;
231.5
1271 .. 1615
ATCA
1.5D
0.224
7.000
+H
2
O
MIXED
2008 Mar
+05 04 24.98
-70 43 42.9
-6298.8 mas
6298.8 mas
282.046864
-34.240464
1
N190
231.5
1271 (132)
+05 04 25.44
-70 43 41.6
601.2 mas
7598.8 mas
282.046234
-34.239956
2
N190
231.5
1615 (159)
Non-detection table from Johanson et al. (2014)
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Hide
/
Show
individual components
ID
Obs. RA
Obs. Dec
l
b
Group id
Source name
Image
Descr.
Line
Telescope
Configuration
V
step
RMS
Detection
Class
Date
(J2000)
(J2000)
(deg.)
(deg.)
H
2
O
(km/s)
(mJy/beam)
Yes
/
No
1
+05 30 23.5
-71 07 4.8
281.934347
-32.085791
G281.934-32.086
N206
Image
Descr
22 GHz
;
ATCA
1.5D
0.224
7.000
-H
2
O
MIXED
2013 Feb
2
+05 30 48
-71 07 55.2
281.944034
-32.050874
G281.944-32.051
N206
22 GHz
;
ATCA
1.5D
0.224
7.000
-H
2
O
MIXED
2013 Feb
3
+05 31 0.7
-71 06 54
281.920871
-32.036852
G281.921-32.037
N206
22 GHz
;
ATCA
1.5D
0.224
7.000
-H
2
O
MIXED
2013 Feb
4
+05 31 22.3
-71 06 54
281.915146
-32.008129
G281.915-32.008
N206
22 GHz
;
ATCA
1.5D
0.224
7.000
-H
2
O
MIXED
2013 Feb
5
+05 31 22.7
-71 04 11.6
281.862575
-32.015067
G281.862-32.016
N206
22 GHz
;
ATCA
1.5D
0.224
7.000
-H
2
O
-CH
3
OH II
-OH
MIXED
2008 Mar
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select MAX(h2o_data_all.ra_hms) as ra_hms,MAX(h2o_data_all.dec_dms) as dec_dms,MAX(h2o_data_all.source_name) as source_name,MAX(h2o_data_all.ra) as ra,MAX(h2o_data_all.dec) as dec,MAX(h2o_data_all.l) as l,MAX(h2o_data_all.b) as b,MAX(h2o_data_all.grp) as grp,MAX(h2o_data_all.other_name) as other_name,MAX(h2o_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(h2o_data_all.line) as line,MAX(h2o_data_all.vrange) as vrange,MAX(h2o_data_all.vpeak) as vpeak,MAX(h2o_data_all.peak) as peak,MAX(h2o_data_all.fwhm) as fwhm,MAX(h2o_data_all.int) as int,MAX(h2o_data_all.rms) as rms,MAX(h2o_data_all.units) as units,MAX(h2o_data_all.units_rms) as units_rms,MAX(h2o_data_all.date_txt) as date_txt,MAX(h2o_data_all.telescope_ref) as telescope_ref,MAX(h2o_data_all.telescope_conf) as telescope_conf,MAX(h2o_data_all.v_step) as v_step,MAX(h2o_data_all.beam) as beam,MAX(h2o_data_all.beam_maj) as beam_maj,MAX(h2o_data_all.beam_min) as beam_min,MAX(h2o_data_all.beam_pa) as beam_pa,MAX(h2o_data_all.ref) as ref,MAX(h2o_data_all.list_ref) as list_ref,MAX(h2o_data_all.ascii) as ascii,MAX(h2o_data_all.url) as url,MAX(h2o_data_all.image) as image,MAX(h2o_data_all.image2) as image2,MAX(h2o_data_all.image3) as image3,MAX(h2o_data_all.descr) as descr,MAX(h2o_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(h2o_data_all.dist) as dist,1 as dist_parallax,MAX(h2o_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 h2o_data_all LEFT JOIN all_objects_withmet ON h2o_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 h2o_data_all.line=transitions."Line" WHERE ref ilike 'JOH14' AND detected=true AND hide=false GROUP BY ref
select h2o_data_all.ra_hms,h2o_data_all.dec_dms,h2o_data_all.source_name,h2o_data_all.ra,h2o_data_all.dec,h2o_data_all.l,h2o_data_all.b,h2o_data_all.grp,h2o_data_all.other_name,h2o_data_all.other_desc,h2o_data_all.thermal,h2o_data_all.line,h2o_data_all.vrange,h2o_data_all.vpeak,h2o_data_all.peak,h2o_data_all.fwhm,h2o_data_all.int,h2o_data_all.rms,h2o_data_all.units,h2o_data_all.units_rms,h2o_data_all.date_txt,h2o_data_all.telescope_ref,h2o_data_all.telescope_conf,h2o_data_all.v_step,h2o_data_all.beam,h2o_data_all.beam_maj,h2o_data_all.beam_min,h2o_data_all.beam_pa,h2o_data_all.ref,h2o_data_all.list_ref,h2o_data_all.ascii,h2o_data_all.url,h2o_data_all.image,h2o_data_all.image2,h2o_data_all.image3,h2o_data_all.descr,h2o_data_all.id,h2o_data_all.mjy_flag,h2o_data_all.rms_mjy_flag,h2o_data_all.dist,h2o_data_all.dist_parallax,h2o_data_all.date_txt,line_det,type,simbad_types_cat FROM h2o_data_all LEFT JOIN all_objects_withmet ON h2o_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 h2o_data_all.line=transitions."Line" WHERE ref ilike 'JOH14' AND detected=true AND hide=false ORDER BY detected DESC,id