J/A+AS/93/121 CO emission from a sample of IRAS sources (Nyman+ 1992)
A survey of circumstellar CO emission from a sample of IRAS sources
Nyman L.A., Booth R.S., Carlstroem U., Habing H.J., Heske A., Sahai R.,
Stark R., van der Veen W.E.C.J., Winnberg A.
<Astron. Astrophys. Suppl. Ser. 93, 121 (1992)>
=1992A&AS...93..121N 1992A&AS...93..121N
ADC_Keywords: Infrared sources; CO; Stars, late-type; Mass loss
Keywords: stars: circumstellar matter - stars: mass loss - radio lines:
molecular (CO) - infrared radiation
Abstract:
The first results from a survey of circumstellar CO(1-0) emission
are presented. The sources were selected from the IRAS point source
catalog according to the IRAS color criteria described in van der Veen
and Habing (1988A&A...194..125V 1988A&A...194..125V). The sources have good quality fluxes
at 12, 25, and 60 microns, flux densities larger than 20Jy at 25µm,
and are situated more than 5° away from the Galactic plane. The
survey is undertaken to study the relationship between mass loss
rates, dust properties, and the evolution along the AGB. The sample
consists of 787 sources and contains both oxygen and carbon-rich
stars, including Mira variables, OH/IR objects, protoplanetary
nebulae, planetary nebulae, and 60-micron excess sources. So far, 519
objects, situated on both the northern and the southern sky, have been
observed; 163 sources were found to have circumstellar CO emission,
and in 58 of these CO emission has not previously been detected.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 90 519 Detected and undetected sources
table6.dat 69 103 Objects with cold envelopes
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1 A1 --- T [abc] Table indicator: a=detected,
b=tentative, c=not detected.
2- 12 A11 --- IRAS IRAS Source Name
13- 16 A4 --- Region in the IRAS two color diagram as defined by
van der Veen & Habing, 1988A&A...194..125V 1988A&A...194..125V
18- 23 F6.0 Jy F12 IRAS 12 micrometer flux density
25- 30 F6.0 Jy F25 IRAS 25 micrometer flux density
32- 37 F6.0 Jy F60 IRAS 60 micrometer flux density
39- 43 F5.3 K rms ? Rms noise the CO spectrum, given in K (Tmb).
45- 49 F5.2 K Tmb ? Main beam brightness peak intensity of the
detected line
51- 56 F6.1 km/s V0 ? Center velocity of the CO line (in km/s).
57 A1 --- n_V0 [ab] Remark on V0 (1)
59- 62 F4.1 km/s Vexp ? Expansion velocity. This is half of the
full line width at zero intensity.
64- 68 F5.1 K.km/s Ico ? CO intensity integrated over the whole line
(in K.km/s, Tmb scale).
70- 71 I2 --- Ref ? Reference to a previous CO detection of
the source. (2)
73- 90 A18 --- Ident Source name if differs from the IRAS name.
An asterisk after the name indicates that
there is an interstellar line included in
the CO spectrum.
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Note (1): Note as follows:
a = The centre velocity is uncertain up to ±10 kms-1 (see text).
b = Previous CO detections. For sources previously detected in CO(1-0)
emission and not detected by us, the CO(1-0) line was usually too
weak to be seen with our sensitivity limit, and in a few cases it
may only have been a tentative detection. Sources detected in the
CO(2-1) line are also listed as previous detections.
The CO(2-1) line can be brighter than the (1-0) line
because of optical depth and beam filling effects, and the
(1-0) line may be too weak to be detected.
Note (2): References are numbered as follows:
1 = Knapp & Morris (1985ApJ...292..640K 1985ApJ...292..640K),
2 = Zuckerman et al. (1986ApJ...304..401Z 1986ApJ...304..401Z),
3 = Zuckerman & Dyck (1986ApJ...304..394Z 1986ApJ...304..394Z),
4 = Zuckerman & Dyck (1986ApJ...311..345Z 1986ApJ...311..345Z),
5 = Zuckerman & Dyck (1989A&A...209..119Z 1989A&A...209..119Z),
6 = Olofsson et al. (1987A&A...183L..13O 1987A&A...183L..13O),
7 = Olofsson et al. (1988A&A...196L...1O 1988A&A...196L...1O),
8 = Sopka et al. (1989A&A...210...78S 1989A&A...210...78S),
9 = Lindqvist et al. (1988A&A...205L..15L 1988A&A...205L..15L),
10 = Wannier & Sahai (1986ApJ...311..335W 1986ApJ...311..335W),
11 = Nguyen-Q-Rieu et al. (1987A&A...180..117N 1987A&A...180..117N),
12 = Knapp et al. (1982ApJ...252..616K 1982ApJ...252..616K),
13 = Likkel et al. (1987A&A...173L..11L 1987A&A...173L..11L),
14 = Knapp et al. (1989ApJ...336..822K 1989ApJ...336..822K),
15 = Deguchi et al. (1990A&A...230..339D 1990A&A...230..339D),
16 = Loup et al. (1990A&A...227L..29L 1990A&A...227L..29L),
17 = Heske et al. (1990A&A...239..173H 1990A&A...239..173H),
18 = Huggins & Healy (1989ApJ...346..201H 1989ApJ...346..201H),
19 = Woodsworth et al. (1990A&A...228..503W 1990A&A...228..503W),
20 = Margulis et al. (1990ApJ...361..673M 1990ApJ...361..673M),
21 = Knapp (1986ApJ...311..731K 1986ApJ...311..731K),
22 = Leahy et al. (1987ApJ...320..825L 1987ApJ...320..825L),
23 = Arquilla et al. (1986MNRAS.220..125A 1986MNRAS.220..125A)
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Table 5: CO parameters as function of IRAS regions
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Region v_exp Dv_exp K_60 ± A_60 ± r_60 n
------------------------------------------------------------------
II 11.4 5.4 0.64 0.19 -0.48 0.28 0.63 19
IIIa 14.5 4.0 0.87 0.06 -0.76 0.09 0.88 67
IIIb 17.2 3.7 0.68 0.20 -0.51 0.30 0.79 9
IV 18.9
V 12.7 2.0
VIa 16.1 8.9 1.03 0.18 -0.67 0.21 0.92 8
VIb 17.7
VII 16.6 6.6 0.91 0.07 -0.50 0.10 0.87 50
------------------------------------------------------------------
r_60 is the correlation coefficient to the fit
log(ICO)=K60.log(F60)+A60
and n is the number of sources included in the fit.
Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- IRAS IRAS Source Name
12- 15 A4 --- Region in the IRAS two color diagram as defined by
van der Veen & Habing, 1988A&A...194..125V 1988A&A...194..125V
17- 18 A2 --- Det Detection, as:
D = Detected by us;
? = Tentative detection;
N = Non-detection;
* = Interstellar line in the CO spectrum.
20- 21 I2 --- r_Det ? Reference to previous detection (1)
23- 58 A36 --- Ident Identification
61- 65 A5 --- SpType MK spectral type
67- 70 A4 --- r_Id Reference to Identification (1)
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Note (1): References are numbered as follows:
1 = Zijlstra et al. (1989A&A...217..157Z 1989A&A...217..157Z)
2 = Volk & Kwok (1989ApJ...342..345V 1989ApJ...342..345V)
3 = Kwok et al. (1989ApJ...345L..51K 1989ApJ...345L..51K)
4 = te Lintel Hekkert et al. (1988A&A...202L..19T 1988A&A...202L..19T)
5 = Hrivnak et al. (1988ApJ...331..832H 1988ApJ...331..832H)
6 = Cernicharo et al. (1989A&A...222L...1C 1989A&A...222L...1C)
7 = Cohen & Schwarz (1984AJ.....89..277C 1984AJ.....89..277C)
8 = Beichman et al. (1986ApJ...307..337B 1986ApJ...307..337B)
9 = Gaylard et al. (1989MNRAS.236..247G 1989MNRAS.236..247G)
10 = te Lintel Hekkert et al. (1989A&AS...78..399T 1989A&AS...78..399T)
11 = Menzies & Wolstencroft (1990MNRAS.247..177M 1990MNRAS.247..177M)
12 = Hu et al. (1989A&A...208..213H 1989A&A...208..213H)
13 = Hu et al. (1990fmpn.coll..487H)
14 = Rao et al. (1990A&A...234..410K 1990A&A...234..410K)
15 = Lambert et al. (1986ApJS...62..373L 1986ApJS...62..373L)
16 = Heske et al. (1990A&A...239..173H 1990A&A...239..173H)
17 = Olofsson et al. (1987A&A...183L..13O 1987A&A...183L..13O)
18 = Woodsworth et al. (1990A&A...228..503W 1990A&A...228..503W)
19 = Sopka et al. (1989A&A...210...78S 1989A&A...210...78S)
20 = Knapp & Morris (1985ApJ...292..640K 1985ApJ...292..640K)
21 = Loup et al. (1990A&A...227L..29L 1990A&A...227L..29L)
22 = Zuckerman et al. (1986ApJ...304..401Z 1986ApJ...304..401Z)
23 = Olofsson et al. (1988A&A...196L...1O 1988A&A...196L...1O)
24 = Knapp et al. (1989ApJ...336..822K 1989ApJ...336..822K)
25 = Zuckerman & Dyck (1986ApJ...311..345Z 1986ApJ...311..345Z)
26 = Huggins & Healy (1989ApJ...346..201H 1989ApJ...346..201H)
27 = Likkel et al. (1987A&A...173L..11L 1987A&A...173L..11L)
28 = Zuckerman & Dyck (1986ApJ...304..394Z 1986ApJ...304..394Z)
29 = Arquilla et al. (1986MNRAS.220..125A 1986MNRAS.220..125A)
30 = Pesce et al., in "A Decade of UV Astronomy with the IUE Satellite"
(1988uvai....1..253P 1988uvai....1..253P).
(End) [CDS] 19-Mar-1993