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H
2
O
CES90 - Water maser variability and disk structure in S 255.
Short title
: Cesaroni (1990)
Authors
: Cesaroni, R.
Journal
: Astronomy and Astrophysics, Vol. 233, p. 513 (1990)
Bibcode
:
1990A&A...233..513C
Target type
: High_mass_SFR
Transitions
: H2O_22
Abstract
The 22 GHz H2O maser emission from 5 sources associated with regions of star formation and showing triple peak profiles has been observed by means of the 32 m antenna of Medicina (Italy). One of these sources (S 255) has been monitored for about 2 years. The acquired spectra show an anticorrelated variability of the two side lines on time scales of a few months. This phenomenon is interpreted in terms of a disk in Keplerian rotation seen edge on. In order to quantify both the spectrum profile and its peculiar variations the radiative transfer equation in the disk is numerically solved, and the computed spectra compared with the observed ones. The H2O maser is demonstrated to be saturated and radiatively pumped.
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Detection table from Cesaroni (1990)
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individual components
ID
Obs. RA
Obs. Dec
l
b
Group id
Source name
Image
Line
V
peak
F
peak
∫F dv
Telescope
RMS
Beam
Detection
Class
Dist. (parallax)
Date
(J2000)
(J2000)
(deg.)
(deg.)
H
2
O
(km/s)
(Jy)
(Jy*km/s)
(Jy)
(arcsec)
Yes
/
No
(kpc)
1
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
0.18 (0.024)
21.0 (1.2)
0.8 (0.06)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Mar 1987
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
7.13 (0.016)
31.0 (1.2)
0.9 (0.04)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Mar 1987
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
14.34 (0.079)
8.0 (1.0)
1.3 (0.19)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Mar 1987
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
0.21 (0.025)
17.1 (1.0)
0.8 (0.06)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Jun 1987
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
7.06 (0.10)
41.8 (1.0)
0.9 (0.03)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Jun 1987
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
13.12 (0.010)
40.2 (1.1)
0.8 (0.02)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Jun 1987
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
0.29 (0.195)
5.3 (2.6)
0.8 (0.47)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Sep 1987
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
7.08 (0.033)
36.1 (2.2)
1.1 (0.08)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Sep 1987
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
12.53 (0.028)
37.2 (2.6)
0.8 (0.07)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Sep 1987
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
0.42 (0.083)
4.4 (1.0)
0.7 (0.20)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Nov 1987
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
7.17 (0.008)
53.6 (0.9)
1.0 (0.02)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Nov 1987
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
12.20 (0.008)
53.7 (0.8)
1.2 (0.02)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Nov 1987
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
0.60 (0.055)
4.5 (0.9)
0.5 (0.13)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Feb 1988
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
7.21 (0.005)
74.8 (0.7)
1.1 (0.01)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Feb 1988
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
12.04 (0.007)
48.3 (0.6)
1.1 (0.02)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Feb 1988
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
0.67 (0.015)
48.4 (1.4)
1.1 (0.04)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Jul 1988
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
7.08 (0.016)
46.9 (1.3)
1.1 (0.04)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Jul 1988
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
11.48 (0.179)
4.1 (1.4)
1.1 (0.43)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Jul 1988
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
0.41 (0.007)
46.7 (0.8)
0.8 (0.02)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Sep 1988
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
7.03 (0.008)
44.0 (0.7)
1.1 (0.02)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Sep 1988
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
11.71 (0.072)
4.3 (0.8)
0.8 (0.17)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Sep 1988
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
0.36 (0.014)
23.8 (0.9)
0.7 (0.03)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Sep 1988
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
6.95 (0.014)
27.9 (0.8)
1.1 (0.03)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Oct 1988
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
11.57 (0.092)
3.2 (1.0)
0.6 (0.22)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Oct 1988
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
13.92 (0.062)
3.6 (1.3)
0.4 (0.15)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Oct 1988
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
0.67 (0.201)
2.5 (0.7)
1.4 (0.49)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Jan 1989
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
6.90 (0.012)
35.6 (0.9)
0.9 (0.03)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Jan 1989
06 12 53.6
+17 59 27
192.5986
-0.0489
G192.599-0.048
S255
Image
22 GHz
;
11.78 (0.076)
4.8 (1.0)
0.7 (0.18)
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
MIXED
Jan 1989
29
06 14 36.5
+13 49 33.4
196.4535
-1.6798
G196.454-1.677
S269
Image
22 GHz
;
19.5
150
MED
2.600
114
+H
2
O
-CH
3
OH I
+CH
3
OH II
+OH
SFR
30
18 47 34.7
-01 12 45.9
31.4126
0.3056
G31.412+0.307
G31.4+0.3
Image
22 GHz
;
99
80
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
+OH
SFR
31
18 47 42.1
-01 45 9.4
30.9463
0.0318
G30.944+0.035
W43 OH
Image
22 GHz
;
-52
65
MED
2.600
114
+H
2
O
-CH
3
OH II
+OH
+SiO
MIXED
32
19 13 22
+10 50 52.5
45.0708
0.1325
G45.071+0.132
G45.1+0.1
Image
22 GHz
;
60
50
MED
2.600
114
+H
2
O
+CH
3
OH I
+CH
3
OH II
+OH
-SiO
SFR
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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 'CES90' 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 'CES90' AND detected=true AND hide=false ORDER BY detected DESC,id
