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CH3OH_I
MCE16B - NH3(3,3) and CH3OH near Supernova Remnants: GBT and VLA Observations
Interferometry data
Short title
: McEwen et al. (2016b)
Authors
: McEwen, Bridget C. Pihlström, Ylva M. Sjouwerman, Loránt O.
Journal
: The Astrophysical Journal, Volume 826, Issue 2, article id. 189,
11
pp. (2016).
Bibcode
:
2016ApJ...826..189M
Target type
: SNR
Transitions
: SiO_1-0v0,CH3OH_25-30_GHz(I),CH3OH_36(I),CH3OH_44(I),CH3OH_84(I),CH3OH_95(I),CH3OH_6(II),CH3OH_37(II),CH3OH_38(II)
Abstract
We report on Green Bank Telescope 23.87 GHz NH
3
(3,3) emission observations in five supernova remnants (SNRs) interacting with molecular clouds (G1.4-0.1, IC 443, W44, W51C, and G5.7-0.0). The observations show a clumpy gas density distribution, and in most cases the narrow line widths of &tilde3-4 km s
-1
are suggestive of maser emission. Very Large Array observations reveal 36 and/or 44 GHz CH
3
OH maser emission in a majority (72%) of the NH
3
peak positions toward three of these SNRs. This good positional correlation is in agreement with the high densities required for the excitation of each line. Through these observations we have shown that CH
3
OH and NH
3
maser emission can be used as indicators of high-density clumps of gas shocked by SNRs, and provide density estimates thereof. Modeling of the optical depth of the NH
3
(3,3) emission is compared to that of CH
3
OH, constraining the densities of the clumps to a typical density of the order of 10
5
cm
-3
for cospatial masers. Regions of gas with this density are found to exist in the post-shocked gas quite close to the SNR shock front, and may be associated with sites where cosmic rays produce gamma-ray emission via neutral pion decay. eprintid:
arXiv:1606.01263
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:
Table (CSV)
View as list of objects
Detection table from McEwen et al. (2016b)
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individual components
ID
Obs. RA
Obs. Dec
RA offset
Dec offset
l
b
Group id
#
Maser spot
Source name
Other name
Image
Line
V
peak
F
peak
∫F dv
Telescope
Beam
Detection
Class
Dist. (parallax)
Date
(J2000)
(J2000)
(mas)
(mas)
(deg.)
(deg.)
Other Name
CH
3
OH (class I)
(km/s)
(Jy/beam)
(Jy/beam*km/s)
(arcsec)
Yes
/
No
(kpc)
1
+19 23 50
+14 06 00
49.140452
-0.602805
G48.990-0.299
W51C
G049.2-0.7
Image
36 GHz (I)
;
57.6 .. 76.2
0.13 .. 0.54
..
GBT
2.65 x 1.9
+H
2
O
+CH
3
OH I
+CH
3
OH II
+OH
SFR
2014 September 4
+19 22 42.69
+14 09 55.5
-1.00965e+06 mas
235500 mas
49.069663
-0.332183
1
B36-1
W51C
57.6
0.25
+19 22 42.21
+14 09 51.5
-1.01685e+06 mas
231500 mas
49.067769
-0.330998
2
B36-2
W51C
59.6
0.14
+19 22 42.76
+14 10 02
-1.0086e+06 mas
242000 mas
49.071389
-0.331581
3
B36-3
W51C
57.6
0.13
+19 22 41.42
+14 09 3.5
-1.0287e+06 mas
183500 mas
49.054506
-0.334473
4
B36-4
W51C
74.1
0.24
+19 22 25.7
+14 06 35
-1.2645e+06 mas
35000 mas
48.988175
-0.297916
5
F36-1
W51C
65.9
0.43
+19 22 26.01
+14 06 36
-1.25985e+06 mas
36000 mas
48.989011
-0.298890
6
F36-2
W51C
65.9
0.54
+19 22 26.11
+14 06 37
-1.25835e+06 mas
37000 mas
48.989446
-0.299115
7
F36-3
W51C
63.8
0.5
+19 22 12.08
+14 02 49.5
-1.4688e+06 mas
-190500 mas
48.906984
-0.278896
8
L36-1
W51C
67.9
0.43
+19 22 7.34
+14 02 18.5
-1.5399e+06 mas
-221500 mas
48.890360
-0.266055
9
L36-2
W51C
76.2
0.19
2
+17 59 02
-24 04 1.14255e-10
5.718211
-0.100383
G5.618-0.082
G5.7-0.0
-
Image
36 GHz (I)
;
-26.4
0.21 .. 0.38
..
GBT
2.65 x 1.9
+H
2
O
+CH
3
OH I
+CH
3
OH II
SFR
2016 September 4
+17 58 44.99
-24 08 38
-255149 mas
-277999 mas
5.619011
-0.082833
1
A36-1
G5.7-0.0
-26.4
0.38
+17 58 45.17
-24 08 39.5
-252449 mas
-279499 mas
5.618991
-0.083634
2
A36-2
G5.7-0.0
-26.4
0.26
+17 58 44.85
-24 08 36.5
-257249 mas
-276499 mas
5.619106
-0.082164
3
A36-3
G5.7-0.0
-26.4
0.21
3
+17 59 02
-24 04 1.14255e-10
5.718211
-0.100383
G5.618-0.082
G5.7-0.0
-
44 GHz (I)
;
-24.4
0.35 .. 1.31
..
GBT
2.11 x 1.84
+H
2
O
+CH
3
OH I
+CH
3
OH II
SFR
2017 September 4
+17 58 44.48
-24 08 37
-262799 mas
-276999 mas
5.618284
-0.081014
1
A44-1
G5.7-0.0
-24.4
1.31
+17 58 44.88
-24 08 37
-256799 mas
-276999 mas
5.619043
-0.082332
2
A44-2
G5.7-0.0
-24.4
0.35
4
+18 56 00
+01 22 00
34.668302
-0.391577
G34.731-0.633
W44
G034.7-0.4
Image
36 GHz (I)
;
40.9 .. 47.1
0.09 .. 0.3
..
GBT
2.65 x 1.9
+H
2
O
+CH
3
OH I
SFR
2018 September 4
+18 56 43.96
+01 23 54.2
659400 mas
114199 mas
34.780092
-0.540037
1
A36-1
W44
40.9
0.25
+18 56 48.39
+01 18 45.7
725850 mas
-194301 mas
34.712260
-0.595565
2
F36-1
W44
42.9
0.09
+18 56 50.82
+01 18 17.3
762300 mas
-222701 mas
34.709860
-0.608172
3
G36-1
W44
42.9
0.14
+18 56 50.86
+01 18 21.8
762900 mas
-218201 mas
34.711049
-0.607750
4
G36-2
W44
40.9
0.11
+18 56 52.49
+01 18 12.3
787350 mas
-227701 mas
34.711799
-0.614996
5
G36-3
W44
47.1
0.12
+18 56 58.46
+01 18 41.7
876900 mas
-198301 mas
34.730416
-0.633396
6
K36-1
W44
45
0.3
5
+18 56 00
+01 22 00
34.668302
-0.391577
G34.712-0.595
W44
G034.7-0.4
44 GHz (I)
;
6.7 .. 56.9
0.21 .. 0.31
..
GBT
2.11 x 1.84
-H
2
O
+CH
3
OH I
+CH
3
OH II
-SiO
MIXED
2019 September 4
+18 56 49.86
+01 18 43.2
747900 mas
-196801 mas
34.714437
-0.601331
1
K44-1
W44
56.9
0.21
+18 56 48.36
+01 18 46.2
725400 mas
-193801 mas
34.712327
-0.595391
2
L44-1
W44
45
0.31
+18 56 57.86
+01 17 27.7
867900 mas
-272301 mas
34.710985
-0.640554
3
P44-1
W44
35.6
0.26
+18 56 59.69
+01 19 17.2
895350 mas
-162801 mas
34.741530
-0.633455
4
Q44-1
W44
6.7
0.24
Non-detection table from McEwen et al. (2016b)
Export table to csv
Hide
/
Show
individual components
ID
Obs. RA
Obs. Dec
l
b
Group id
Source name
Other name
Line
Telescope
Beam
Detection
Class
Date
(J2000)
(J2000)
(deg.)
(deg.)
Other Name
CH
3
OH (class I)
(arcsec)
Yes
/
No
1
+19 23 50
+14 06 00
49.140452
-0.602805
G49.140-0.603
W51C
G049.2-0.7
44 GHz (I)
;
GBT
2.11 x 1.84
-CH
3
OH I
EVOLVED
2015 September 4
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X
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
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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 'MCE16B' 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 'MCE16B' AND detected=true AND hide=false ORDER BY detected DESC,id
