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LIT94 - A search for SiO, OH, CO and HCN radio emission from silicate-carbon stars
Short title
: Little-Marenin et al. (1994)
Authors
: Little-Marenin, I. R. Sahai, R. Wannier, P. G. Benson, P. J. Gaylard, M. Omont, A.
Journal
: Astronomy and Astrophysics (ISSN 0004-6361), vol. 281, no. 2, p. 451-459
Bibcode
:
1994A&A...281..451L
Abstract
We report upper limits for radio emission of SiO at 86 and 43 GHz, of OH at 1612 and 1665/1667 MHz, of CO at 115 GHz and HCN at 88.6 GHz in the silicate-carbon stars. These upper limits of SiO imply that oxygen-rich material has not been detected within 2R
star
of a central star even though the detected emission from silicate dust grains, H2O and OH maser establishes the presence of oxygen-rich material from about tens to thousands of AU of a central star. The upper limit of the SiO abundance is consistent with that found in oxygen-rich envelopes. Upper limits of the mass loss rate (based on the CO data) are estimated to be between 10
-6
to 10
-7
solar mass/yr assuming a distance of 1.5 kpc for these stars. The absence of HCN microwave emission implies that no carbon-rich material can be detected at large distances (thousands of AU) from a central star. The lack of detections of SiO, CO, and HCN emission is most likely due to the large distances of these stars. A number of C stars were detected in CO and HCN, but only the M supergiant VX Sgr was detected in CO.
Comments:
Velocity resolution: 0.90 km/s
Upper limit for non-detections: mostly <0.75 Jy (3σ)
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Table (CSV)
View as list of objects
Detection table from Little-Marenin et al. (1994)
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individual components
ID
Obs. RA
Obs. Dec
l
b
Group id
Source name
Frequency
V
range
V
peak
F
peak
List
Detection
Class
Dist. (parallax)
Ref.
(J2000)
(J2000)
(deg.)
(deg.)
(MHz)
(km/s)
(km/s)
(Jy)
Yes
/
No
(kpc)
1
20 36 6.6
+60 05 17
95.7549
11.5090
G95.758+11.509
V778 Cyg
1667
17.0
-17.0
0.200
ENG15
+H
2
O
+OH
-SiO
EVOLVED
LIT94
Non-detection table from Little-Marenin et al. (1994)
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individual components
ID
Obs. RA
Obs. Dec
l
b
Group id
Source name
Line
F
peak
List
Detection
Class
Ref.
(J2000)
(J2000)
(deg.)
(deg.)
OH
(Jy)
Yes
/
No
1
07 20 59
+24 59 59
193.1653
17.2416
G193.164+17.239
BM Gem
1.612 GHz
;
0.600
ENG15
-H
2
O
-OH
-SiO
EVOLVED
LIT94
2
07 20 59
+24 59 59
193.1653
17.2416
G193.164+17.239
BM Gem
1.665 GHz
;
0.750
ENG15
-H
2
O
-OH
-SiO
EVOLVED
LIT94
3
07 20 59
+24 59 59
193.1653
17.2416
G193.164+17.239
BM Gem
1.667 GHz
;
0.750
ENG15
-H
2
O
-OH
-SiO
EVOLVED
LIT94
4
08 02 5.4
-38 11 55
254.2850
-4.0002
G254.284-4.000
Hen 38
1.612 GHz
;
2.100
ENG15
-H
2
O
-OH
-SiO
EVOLVED
LIT94
5
08 02 5.4
-38 11 55
254.2850
-4.0002
G254.284-4.000
Hen 38
1.667 GHz
;
0.600
ENG15
-H
2
O
-OH
-SiO
EVOLVED
LIT94
6
08 58 53.9
-60 47 37
278.0690
-9.7152
G278.069-9.715
Mc79-11
1.612 GHz
;
1.500
ENG15
+H
2
O
-OH
EVOLVED
LIT94
7
08 58 53.9
-60 47 37
278.0690
-9.7152
G278.069-9.715
Mc79-11
1.667 GHz
;
0.750
ENG15
+H
2
O
-OH
EVOLVED
LIT94
8
23 20 1.8
+47 14 26
107.2433
-12.8276
G107.236-12.824
EU And
1.667 GHz
;
0.210
ENG15
+H
2
O
-OH
-SiO
EVOLVED
LIT94
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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.url) as url,MAX(oh_data_all.image) as image,MAX(oh_data_all.image2) as image2,MAX(oh_data_all.image3) as image3,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 'LIT94' 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.url,oh_data_all.image,oh_data_all.image2,oh_data_all.image3,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 'LIT94' AND detected=true AND hide=false ORDER BY detected DESC,id