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J/A+A/267/515 Very cold C-rich circumstellar envelopes (Omont+ 1993)
Characterization and proportion of very cold C-rich circumstellar envelopes Omont A., Loup C., Forveille T., te Lintel Hekkert P., Habing H., Sivagnanam P. <Astron. Astrophys. 267, 515, (1993)> =1993A&A...267..515O
ADC_Keywords: Infrared sources ; Radio lines ; Stars, carbon Keywords: infrared radiation - radiolines: molecular - stars: carbon - stars: circumstellar matter - stars: late-type - stars: OH/IR File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1 58 19 Supergiants table2 126 57 Sources with CO(2-1) or HCN(1-0) emission table3 126 27 Non-detected sources table4 82 28 CO/HCN line ratios table5 80 24 Estimates of mass-loss rates tablea1 113 228 Master list of the main sample tablea2 113 18 Additional sources
Table6 : Number and proportion of C- and O-rich sources in the different regions of the IRAS color-color diagram (Fig. 1) from tablea1. The last column indicates the rate of OH detections among the sources classified as O-rich where OH was searched Region Total O-rich C-rich ? OH/O ----------------------------------------- IIIa2 61 59 0 2 52% IIIa1 88 52 31 5 67% (59%) (35%) (6%) IIIb2 38 27 9 2 77% (71%) (24%) (5%) IIIb1+IV 17 17 0 0 100% V 17 7 4 6 (100%) VIb 7 6 0 1 ( 25%) ----------------------------------------- Total 228 168 44 16 68% (74%) (19%) (7%) Byte-by-byte Description of file: table1
Bytes Format Units Label Explanations
1- 3 I3 --- No Identification number in tablea1 and tablea2 7- 16 A10 --- Name Usual name 20 A1 --- Sp Spectral type 26- 30 A5 --- Region Region in the IRAS color-color diagram (1) 34- 36 A3 --- LRS LRS spectral class 41- 45 I5 solLum FIRAS IRAS total flux expressed in solar luminosity at 1kpc 58 A1 --- n [+?] A + indicates the post-AGB nature of the star
Note (1): Region in the IRAS color-color diagram according to the definitions of van der Veen & Habing (1988A&A...194..125V), and this paper
Byte-by-byte Description of file: table2 table3
Bytes Format Units Label Explanations
1- 3 A3 --- No Identification number in tablea1 and tablea2 5- 14 A10 --- Name Usual name 16- 17 I2 h RAh ? Right ascension 1950 19- 20 I2 min RAm ? Right ascension 1950 22- 25 F4.1 s RAs ? Right ascension 1950 27 A1 --- DE- ? Declination sign 28- 29 I2 deg DEd ? Declination 1950 31- 32 I2 arcmin DEm ? Declination 1950 34- 35 I2 arcsec DEs ? Declination 1950 37 A1 --- Chem. [COS] Chemical type 38 A1 --- n_Chem. [*#] (1) 39 A1 --- u_Chem. [?] uncertainty flag on chemical type 41- 45 A5 --- Region Region in the IRAS color-color diagram (2) 47- 55 A9 --- Tran. Observed transitions 57- 59 I3 km/s Vlsr ? Star velocity 61- 64 F4.1 km/s Ve ? Expansion velocity as the half width at zero power 66- 70 F5.3 K TMB ? Main-beam brightness temperature measured at the peak of the line 72- 76 F5.3 K e_TMB ? rms noise of T_MB 78- 82 F5.1 K.km/s I ? Integrated area 83 A1 --- u_I [?] uncertainty flag on I 84 A1 --- l_I(CO)/I(HCN) limit flag on ICO/IHCN 85- 88 F4.1 --- I(CO)/I(HCN) ? Intensity ratio CO(2-1)/HCN(1-0) 90- 94 F5.2 --- S60/I(CO) ? Ratio 60 micrometer to CO(2-1) emissions 97-126 A30 --- Rem Remarks (3)
Note (1): * indicates that the determination of the chemical type comes from this paper, # indicates that the chemical type was confirmed in this paper Note (2): Region in the IRAS color-color diagram according to the definitions of van der Veen & Habing (1988A&A...194..125V), and this paper Note (3): Obervation date, mapping, interstellar contamination, numbers in brackets indicate references of previous detections (1) Zuckerman & Dyck 1986ApJ...304..394Z (2) Zuckerman et al. 1986ApJ...304..401Z (3) Zuckerman & Dyck 1986ApJ...311..345Z (4) Arquilla et al. 1986MNRAS.220..125A (5) Likkel et al. 1987A&A...173L..11L (6) Lucas et al. 1988A&A...194..230L (7) Lindqvist et al 1988A&A...205L..15L (8) Knapp et al. 1989ApJ...336..822K (9) Zuckerman & Dyck 1989A&A...209..119Z (10) Woodsworth et al. 1990A&A...228..503W (11) Likkel et al. 1991A&A...246..153L
Byte-by-byte Description of file: table4
Bytes Format Units Label Explanations
1- 3 A3 --- No Identification number in tablea1 & tablea2 5- 14 A10 --- Name Usual name 16- 20 A5 --- Region Region in the IRAS color-color diagram (1) 23- 28 A6 --- LRS LRS spectral class 31 A1 --- Chem. [COS] Chemical type 32 A1 --- u_Chem. [?] uncertainty flag on chemical type 36 A1 --- l_CO(1-0)/HCN [~] limit flag on CO(1-0)/HCN 37- 40 F4.1 --- CO(1-0)/HCN ? CO(1-0)/HCN line ratio 45- 48 F4.1 --- CO(2-1)/HCN ? CO(2-1)/HCN line ratio 54- 58 A5 --- Ref References (2) 63- 82 A20 --- Com Comments
Note (1): Region in the IRAS color-color diagram according to the definitions of van der Veen & Habing (1988A&A...194..125V), and this paper Note (2): (0) present paper (Table 2) (13) Nguyen-Q-Rieu et al. 1987A&A...180..117N (14) Sopka et al. 1989A&A...210...78S (15) Knapp & Morris 1985ApJ...292..640K (16) Nercessian et al. 1989A&A...210..225N (17) Bujarrabal et al. 1988A&A...204..242B (18) Morris et al. 1987ApJ...321..888M (19) Bachiller et al. 1988A&A...196L...5B
Byte-by-byte Description of file: table5
Bytes Format Units Label Explanations
1- 3 A3 --- No Identification number in tablea1 & tablea2 5- 14 A10 --- Name Usual name 16- 20 A5 --- Region Region in the IRAS color-color diagram (1) 23- 28 A6 --- LRS LRS spectral class 30 A1 --- Chem. [COS] Chemical type 31 A1 --- u_Chem. [?] uncertainty flag on chemical type 35- 38 F4.2 --- Ftot/FIRAS Bolometric correction 41 A1 --- r_Ftot/FIRAS references for Ftot (2) 45- 48 F4.2 kpc D Distance 49 A1 --- n_D note for D (3) 53- 56 F4.2 10-5Sun/yr dM1/dt ? mass-loss rate form CO(1-0) (4) 60- 62 A3 --- r_dM1/dt references for J=1-0 CO observations 66- 71 F6.4 10-5Sun/yr dM2/dt ? mass-loss rate from CO(2-1) (4) 72 A1 --- n_dM2/dt note for dMCO(2-1)/dt (3) 76- 80 F5.2 --- dMIR/dt ? mass-loss rates deduced from infrared observations following Jura & Kleinmann (1989, ApJ 341, 369)
Note (1): Region in the IRAS color-color diagram according to the definitions of van der Veen & Habing (1988A&A...194..125V), and this paper Note (2): (a) van der Veen & Breukers (1989) from actual 1-60 micrometer photometry (b) applying to S12 the bolometric corrections proposed by van der Veen & Breukers (c) assuming the following values for Ftot/Firas, 2 for region IIIa1, 1.2 for region IIIb2, 1.0 for region V without visible star, 2.5 for region V where a visible star is reported (d) Kwok et al. 1989. Note (3): 'p' inappropriate if the source is a supergiant 'q' extended CO(2-1) source, dM2/dt should be multiplied by ∼2 Note (4): mass-loss rate are deduced from Eqs (3) and (4) assuming f_CO=10^-3 for C-rich sources and f_CO=5.10^-4 for others
Byte-by-byte Description of file: tablea1 tablea2
Bytes Format Units Label Explanations
1 A1 --- n_No A "*" preceding the number indicates that the source was observed in the millimeter lines in the present study 2- 5 A4 --- No Classification number 7- 16 A10 --- IRAS IRAS-PSC (1985) name 19- 23 F5.2 --- C21 25/12µm index, C21 = log (12F25/25F12) 24 A1 --- u_C21 [)] uncertainty flag on C21 26- 30 F5.2 --- C32 60/25µm index, C32 = log(25F60/12F25) 31 A1 --- u_C32 [)] uncertainty flag on C32 33- 37 E5.1 solLum FIRAS ? IRAS total flux expressed in solar luminosity at 1kpc 41- 42 I2 --- Var. ? variability index from the IRAS-PSC catalogue (1985) 46- 52 A7 --- Region Region of the IRAS color-color diagram (1) 54 A1 --- OH [-+.] OH maser detection (2) 58- 61 A4 --- RefOH References for OH maser observations (3) 64- 69 A6 --- LRS LRS spectral class (4) 70 A1 --- u_LRS [?] uncertainty flag on LRS 72 A1 --- Chem. [COS] Proposed chemical type 73 A1 --- u_Chem. [?] uncertainty flag on chemical type 77 A1 --- CO CO detections (2) 78 A1 --- HCN [-+.*] HCN detections (2) 82 A1 --- H2O [-+.] H2O detections (+) or non-detections (-) from the catalogue of Comoretto et al. (1990, A&AS 84, 179) 84-113 A30 --- Rem Remarks (5)
Note (1): (1) Region in the IRAS color-color diagram according to the definitions of van der Veen & Habing (1988A&A...194..125V), and this paper Note (2): + : detected with circumstellar characteristics; - : undetected or interstellar characteristics; . : not searched * : new detection of the present paper Note (3): t : catalogue of OH/IR stars by te Lintel Hekkert et al. (1989) D,B,P : observations at Dwingeloo, Bonn-Effelsberg, and Parkes, respectively, in te Lintel Hekkert et al. (1991a) n,N,N': observations at Nancay, n Sivagnanam et al. (1990) N Le Squeren et al. (1991) N' te Lintel Hekkert et al. (1991b) L : Likkel (1990) a : observations at Arecibo W : catalogue of observations of stellar masers by Benson et al. (1990) Note (4): LRS spectral class, from the IRAS-LRS atlas (1986) when available; otherwise, from the IRAS-LRS database, without determination of the subclass n (Appendix). Most sources classified 5n would have appeared as 50 or 05 in the LRS atlas. Spectra quoted as 4no are 4n spectra with 18 micrometer silicate emission (Fig.2, rows II and III). "kvh" indicates the presence of the 21 micrometer emission (Kwok et al., 1989) (Fig.5, row II). "int" denotes intermediate spectra with a maximum in the middle of the LRS range (Fig.5, row I), probably characteristics of the very early stages of the detachment of PPN envelopes (Loup, 1991). Note (5): (i) Most usual name(s); T = IRC from the Two Micron Sky Survey (Neugebauer and Leighton, 1969) (see catalog II/2 GL = RAFGL catalogue (Price and Murdock, 1983; see catalog II/94) SAO = SAO catalogue, Cat. I/131 V = General Catalogue of Variables Stars (Kholopov 1985, 1987) DO = Deaborn catalogue, cat. II/68 (ii) [] visible spectral types mostly from the IRAS PSC catalogue (1985) (iii) zeta44 autoclass from the auto-classification of LRS spectra by Cheeseman et al. (1989) for objects of autoclass zeta44 (iv) Sources marked with a * present a special interest and deserve further peculiar studies. They include (objects xa belong to Table A2) : (a) double-shell envelopes of region VIb, Nos 29, 57, 74, 89, 124, 130, 141, 16a (b) 21 micrometer sources (kvh spectra), Nos 33, 216, 4a, 17a, possibly 13a (c) "int" spectra, Nos 85, 136, 159, 179 (Fig.5), 10a (d) 4n OH emitters without 18 micrometer feature (Le Squeren et al., 1991), Nos 67, 142; (e) No. 8a with a very strong silicate absorption and no OH emission (f) OH+HCN emitter, No.208 (g) The peculiar OH spectrum 17376-3021 (No. 68) (te Lintel Hekkert et al. 1991a) (h) Sources associated with visible stars: Be (Nos. 24b, 26, 30, 102, 109, 195) or others (Nos. 36, 38, 5a, 11a, 15a) (i) Peculiar objects of region V:17441-2411 (GL 2385, No.72), which displays extended CO emission; 18095+2704 (No.95) with a very strong silicate absorption and a very strong 25 micrometer excess (Volg & Kwok 1988)
History: Keypunched at CDS
(End) Patricia Bauer [CDS] 22-Apr-1994
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