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OH
SZY99 - A comparison of OH and H_2O maser properties of Mira and semiregular variable stars
Short title
: Szymczak & Le Squeren (1999)
Authors
: Szymczak, M. Le Squeren, A. M.
Journal
: Monthly Notices of the Royal Astronomical Society, Volume 304, Issue 2, pp. 415-420.
Bibcode
:
1999MNRAS.304..415S
Abstract
A sample of 17 Miras and nine semiregular variable stars was simultaneously observed in the OH and H_2O maser lines with sensitivities of 0.15 and 0.6 Jy, respectively. One new H_2O source was detected. Among Miras the H_2O maser luminosity is well correlated with the OH maser luminosity. The ratio of H_2O to OH maser luminosities decreases by about four orders of magnitude from the semiregulars to the Miras as a result of an increase in the mass-loss rate. Some semiregulars have maser properties typical of Mira stars. H_2O emission is most likely to be detected from Miras at velocities close to the stellar velocity, while emission at blueshifted velocities dominates the detections from semiregulars. OH emission from the semiregulars usually occurs at greater redshifts and blueshifts with respect to the stellar velocities than OH emission observed from the Miras. The differences in the average composite maser profiles in both groups of stars can be related to the velocity gradients in the maser regions. It is suggested that some semiregular variables with maser emission may be in a later stage of stellar evolution than the Miras.
Comments:
Velocity resolution: 0.28 km/s
Upper limit for non-detections: <0.3 Jy (3σ)
Data not given in Table 1 was provided by M. Szymzcak.
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Table (CSV)
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Spectra (ASCII)
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Detection table from Szymczak & Le Squeren (1999)
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individual components
ID
Obs. RA
Obs. Dec
l
b
Group id
Source name
Spectra
Frequency
V
range
V
peak
F
peak
List
Detection
Type
Dist. (parallax)
Ref.
(J2000)
(J2000)
(deg.)
(deg.)
(MHz)
(km/s)
(km/s)
(Jy)
Yes
/
No
(kpc)
Non-detection table from Szymczak & Le Squeren (1999)
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individual components
ID
Obs. RA
Obs. Dec
l
b
Group id
Source name
Line
F
peak
List
Detection
Type
Ref.
(J2000)
(J2000)
(deg.)
(deg.)
OH
(Jy)
Yes
/
No
1
23 58 24.9
+51 23 19.7
114.5608
-10.6191
G114.561-10.619
R Cas
1.612 GHz
0.081
ENG15
+H
2
O
+OH
+SiO
EVOLVED
SZY99
2
02 26 2.3
-00 10 41.8
166.9655
-54.7513
G166.966-54.751
R Cet
1.612 GHz
0.192
ENG15
+H
2
O
-OH
+SiO
EVOLVED
SZY99
3
02 26 2.3
-00 10 41.8
166.9655
-54.7513
G166.966-54.751
R Cet
1.667 GHz
0.192
ENG15
+H
2
O
-OH
+SiO
EVOLVED
SZY99
4
02 26 2.3
-00 10 41.8
166.9655
-54.7513
G166.966-54.751
R Cet
1.665 GHz
0.126
ENG15
+H
2
O
-OH
+SiO
EVOLVED
SZY99
5
08 16 33.8
+11 43 34.5
211.7494
24.1390
G211.749+24.139
R Cnc
1.612 GHz
0.114
ENG15
+H
2
O
+OH
+SiO
EVOLVED
SZY99
6
08 16 33.8
+11 43 34.5
211.7494
24.1390
G211.749+24.139
R Cnc
1.667 GHz
0.111
ENG15
+H
2
O
+OH
+SiO
EVOLVED
SZY99
7
08 16 33.8
+11 43 34.5
211.7494
24.1390
G211.749+24.139
R Cnc
1.665 GHz
0.072
ENG15
+H
2
O
+OH
+SiO
EVOLVED
SZY99
8
09 35 30.3
-14 41 28.6
248.1490
26.7014
G248.149+26.701
X Hya
1.612 GHz
0.126
ENG15
+H
2
O
+OH
+SiO
EVOLVED
SZY99
9
09 35 30.3
-14 41 28.6
248.1490
26.7014
G248.149+26.701
X Hya
1.667 GHz
0.123
ENG15
+H
2
O
+OH
+SiO
EVOLVED
SZY99
10
09 35 30.3
-14 41 28.6
248.1490
26.7014
G248.149+26.701
X Hya
1.665 GHz
0.123
ENG15
+H
2
O
+OH
+SiO
EVOLVED
SZY99
11
00 03 21.3
+55 40 50
116.1440
-6.5562
G116.144-6.556
Y Cas
1.612 GHz
0.099
ENG15
+H
2
O
+OH
+SiO
EVOLVED
SZY99
12
10 53 37.4
+13 42 54.3
233.0220
59.4264
G233.022+59.426
W Leo
1.612 GHz
0.081
ENG15
+H
2
O
+OH
+SiO
EVOLVED
SZY99
13
04 28 18
+10 09 44.8
185.2174
-25.5813
G185.217-25.581
R Tau
1.612 GHz
0.132
ENG15
+H
2
O
+OH
+SiO
EVOLVED
SZY99
14
15 21 39.5
+14 18 53.1
20.4982
52.7865
G20.498+52.787
S Ser
1.612 GHz
0.096
ENG15
+H
2
O
+OH
+SiO
EVOLVED
SZY99
15
06 37 31.3
-01 23 43.6
212.5880
-3.7325
G212.588-3.732
SY Mon
1.612 GHz
0.219
ENG15
+H
2
O
+OH
+SiO
EVOLVED
SZY99
16
22 12 16.2
+14 33 12.2
75.1858
-33.1833
G75.186-33.183
RS Peg
1.612 GHz
0.144
ENG15
+OH
EVOLVED
SZY99
17
09 47 33.5
+11 25 43.6
223.7207
44.1598
G223.721+44.160
R Leo
1.612 GHz
0.114
ENG15
+H
2
O
+OH
+SiO
EVOLVED
SZY99
18
09 47 33.5
+11 25 43.6
223.7207
44.1598
G223.721+44.160
R Leo
1.667 GHz
0.135
ENG15
+H
2
O
+OH
+SiO
EVOLVED
SZY99
19
13 19 27.8
+45 31 37.7
107.8913
70.7739
G107.891+70.774
V CVn
1.665 GHz
0.099
ENG15
+H
2
O
+OH
-SiO
EVOLVED
SZY99
20
22 05 42.1
+35 20 54.5
88.7152
-16.2855
G88.715-16.285
SV Peg
1.665 GHz
0.039
ENG15
+H
2
O
+OH
+SiO
EVOLVED
SZY99
21
22 05 42.1
+35 20 54.5
88.7152
-16.2855
G88.715-16.285
SV Peg
1.667 GHz
0.045
ENG15
+H
2
O
+OH
+SiO
EVOLVED
SZY99
22
14 24 11.6
+25 42 13.4
34.2773
69.2127
G34.278+69.213
RX Boo
1.665 GHz
0.066
ENG15
+H
2
O
-CH
3
OH I
+OH
+SiO
EVOLVED
SZY99
23
14 24 11.6
+25 42 13.4
34.2773
69.2127
G34.278+69.213
RX Boo
1.667 GHz
0.060
ENG15
+H
2
O
-CH
3
OH I
+OH
+SiO
EVOLVED
SZY99
24
23 55 21.7
+48 38 17.7
113.4683
-13.2004
G113.468-13.200
RS And
1.665 GHz
0.063
ENG15
+H
2
O
-OH
EVOLVED
SZY99
25
23 55 21.7
+48 38 17.7
113.4683
-13.2004
G113.468-13.200
RS And
1.667 GHz
0.057
ENG15
+H
2
O
-OH
EVOLVED
SZY99
26
09 10 38.8
+30 57 47.3
194.4957
42.0801
G194.496+42.080
RS Cnc
1.665 GHz
0.054
ENG15
-H
2
O
-OH
EVOLVED
SZY99
27
09 10 38.8
+30 57 47.3
194.4957
42.0801
G194.496+42.080
RS Cnc
1.667 GHz
0.057
ENG15
-H
2
O
-OH
EVOLVED
SZY99
28
16 02 39.2
+47 14 25.3
74.4640
47.7855
G74.463+47.786
X Her
1.665 GHz
0.183
ENG15
+H
2
O
-OH
EVOLVED
SZY99
29
16 02 39.2
+47 14 25.3
74.4640
47.7855
G74.463+47.786
X Her
1.667 GHz
0.156
ENG15
+H
2
O
-OH
EVOLVED
SZY99
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ATLASGAL 870 um
ATLASGAL 870 um + Planck
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select MAX(oh_data_all.ra_hms) as ra_hms,MAX(oh_data_all.dec_dms) as dec_dms,MAX(oh_data_all.source_name) as source_name,MAX(oh_data_all.ra) as ra,MAX(oh_data_all.dec) as dec,MAX(oh_data_all.l) as l,MAX(oh_data_all.b) as b,MAX(oh_data_all.grp) as grp,MAX(oh_data_all.other_name) as other_name,MAX(oh_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(oh_data_all.freq) as freq,MAX(oh_data_all.vrange) as vrange,MAX(oh_data_all.vpeak) as vpeak,MAX(oh_data_all.peak) as peak,MAX(oh_data_all.fwhm) as fwhm,MAX(oh_data_all.int) as int,MAX(oh_data_all.rms) as rms,MAX(oh_data_all.units) as units,MAX(oh_data_all.units_rms) as units_rms,MAX(oh_data_all.date_txt) as date_txt,MAX(oh_data_all.telescope_ref) as telescope_ref,MAX(oh_data_all.telescope_conf) as telescope_conf,MAX(oh_data_all.v_step) as v_step,MAX(oh_data_all.beam) as beam,MAX(oh_data_all.beam_maj) as beam_maj,MAX(oh_data_all.beam_min) as beam_min,MAX(oh_data_all.beam_pa) as beam_pa,MAX(oh_data_all.ref) as ref,MAX(oh_data_all.list_ref) as list_ref,MAX(oh_data_all.ascii) as ascii,MAX(oh_data_all.image) as image,MAX(oh_data_all.descr) as descr,MAX(oh_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(oh_data_all.dist) as dist,1 as dist_parallax,MAX(oh_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 oh_data_all LEFT JOIN all_objects_withmet ON oh_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 oh_data_all.line=transitions."Line" WHERE ref ilike 'SZY99' AND detected=true AND hide=false GROUP BY ref
select oh_data_all.ra_hms,oh_data_all.dec_dms,oh_data_all.source_name,oh_data_all.ra,oh_data_all.dec,oh_data_all.l,oh_data_all.b,oh_data_all.grp,oh_data_all.other_name,oh_data_all.other_desc,oh_data_all.thermal,oh_data_all.freq,oh_data_all.vrange,oh_data_all.vpeak,oh_data_all.peak,oh_data_all.fwhm,oh_data_all.int,oh_data_all.rms,oh_data_all.units,oh_data_all.units_rms,oh_data_all.date_txt,oh_data_all.telescope_ref,oh_data_all.telescope_conf,oh_data_all.v_step,oh_data_all.beam,oh_data_all.beam_maj,oh_data_all.beam_min,oh_data_all.beam_pa,oh_data_all.ref,oh_data_all.list_ref,oh_data_all.ascii,oh_data_all.image,oh_data_all.descr,oh_data_all.id,oh_data_all.mjy_flag,oh_data_all.rms_mjy_flag,oh_data_all.dist,oh_data_all.dist_parallax,oh_data_all.date_txt,line_det,type,simbad_types_cat FROM oh_data_all LEFT JOIN all_objects_withmet ON oh_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 oh_data_all.line=transitions."Line" WHERE ref ilike 'SZY99' AND detected=true AND hide=false ORDER BY detected DESC,id