2001A&A...368..250A

Query : 2001A&A...368..250A

2001A&A...368..250A - Astronomy and Astrophysics, volume 368, 250-266 (2001/3-2)

Atmospheric abundances in post-AGB candidates of intermediate temperature.

ARELLANO FERRO A., GIRIDHAR S. and MATHIAS P.

Abstract (from CDS):

Detailed atmospheric abundances have been calculated for a sample of A-G supergiant stars with IR fluxes and/or high galactic latitudes. HD 172481 and HD 158616 show clear indications of being post-AGB stars that have experienced third dredge-up. HD 158616 is carbon-rich while the abundance pattern of HD 172481 and its large Li enhancement gives support to the hot bottom burning scenario that explains paucity of carbon-rich stars among AGB stars. HD 172324 is very likely a hot post-AGB star that shows a strong carbon deficiency. HD 725, HD 218753 and HD 331319 also appear to be evolved objects between the red giant and the AGB. HD 9167, HD 173638 with a few exceptions, reflect solar abundances and no signs of post red giant evolution. They are most likely young massive disk supergiants. Further analysis of proto-Planetary Nebula HDE 341617 reveals that He lines show signs of velocity stratification. The emission lines have weakened considerably since 1993. The envelope expands at 19km/s relative to the star. Atmospheric abundances, evolutionary tracks and isochrones are used to estimate masses and ages of all stars in the sample.

Abstract Copyright: ∼

Journal keyword(s): stars: post-AGB - stars: chemically peculiar - stars: evolution

VizieR on-line data: <Available at CDS (J/A+A/368/250): table11.dat table12.dat tables.tex>

Simbad objects: 31

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Number of rows : 31
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 HD 725 * 00 11 44.7419490120 +57 16 17.484454452 8.33 7.688 7.073     F2Ib 48 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11146 1
3 LIN 536 PN 01 24 11.8596151032 -74 02 32.149788540   17.12 17.589   17.716 ~ 35 0
4 HD 9167 * 01 31 52.5584904696 +61 31 24.890683440   9.11 8.19     F0I 24 0
5 IRAS 04296+3429 pA* 04 32 56.9743899192 +34 36 12.459816288   16.13 14.09 13.64 11.64 G0Ia 147 0
6 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17432 0
7 IRAS 05341+0852 pA* 05 36 55.0511076432 +08 54 08.656315452   15.37 13.45 12.95 11.43 F5I 120 0
8 HD 44179 pA* 06 19 58.2185496 -10 38 14.706068 9.51 9.33 9.02     B9Ib/II 765 0
9 V* V382 Aur pA* 06 37 52.4269199856 +53 31 01.958446992   9.585 9.295 9.078   F7IV: 133 0
10 V* PS Gem pA* 07 03 39.6305052432 +10 46 13.068774048   7.76 7.37     A0 120 0
11 HD 56126 pA* 07 16 10.2590823192 +09 59 47.954735376   9.20 8.32     F0/5Ia 320 0
12 HD 70379 pA* 08 20 57.1025596512 -19 15 03.411879264   9.63 9.02 9.463   G1I 31 0
13 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5860 6
14 HD 89353 pA* 10 18 07.5899342712 -28 59 31.195183524   5.76 5.53     B9.5Ib/II 307 0
15 * s Car V* 10 27 52.7297730743 -58 44 21.862230028   4.111 3.810     F2II 90 0
16 V* LN Hya pA* 12 56 30.1302499344 -26 27 37.047715704   9.104 8.697   9.291 F3Ia 120 0
17 V* V340 Ser RV* 17 30 46.9248358536 -11 22 08.313569004   10.51 9.68     F2/3II 36 0
18 HD 161695 s*b 17 45 40.2345892224 +31 30 16.846417440   6.213 6.240     A0Ib 56 0
19 HD 341617 pA* 18 08 20.0857525920 +24 10 43.321447236   11.41 11.39     B1IIIe 87 0
20 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0Va 2687 1
21 HD 172324 pA* 18 37 58.7794438440 +37 26 05.794443384 8.2 8.17 8.16     A0Iabe 43 0
22 HD 172481 pA* 18 41 36.9595215744 -27 57 01.235714652   9.58 9.06     F2/3Ia 49 0
23 HD 173638 * 18 46 43.3242113592 -10 07 30.161333784 6.7 6.285 5.717     F0IV 68 0
24 HD 331319 pA* 19 49 29.5618298904 +31 27 16.248771432 10.4 9.91 9.32 9.24   F3Ibe 95 0
25 HD 187885 pA* 19 52 52.7033593752 -17 01 50.289441096   9.25 8.68 8.32   F2/6Ia 179 0
26 HD 187785 * 19 53 38.5324680744 -44 27 19.518532200   10.50 9.16     K4III 6 0
27 V* V1401 Aql pA* 20 05 05.4136151160 -11 35 57.894584100   6.88 6.39     F2II 109 0
28 V* V448 Lac pA* 22 24 31.4283564864 +43 43 10.978781916 11.22 10.61 9.69     F7I 111 0
29 BD+39 4926 pA* 22 46 11.2272974832 +40 06 26.309865960   9.621 9.357 9.374   A0IIp 126 0
30 * 2 Cas * 23 09 44.1389006784 +59 19 57.687059136 6.33 5.977 5.679     A4II 49 0
31 IRAS 23304+6147 pA* 23 32 44.7858431592 +62 03 49.090372272   15.36 12.99 12.23 10.50 G2Ia 117 0

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