1998A&A...330..651K

Query : 1998A&A...330..651K

1998A&A...330..651K - Astronomy and Astrophysics, volume 330651-658 (1998/2-2)

Behaviour of calcium abundance in Am-Fm stars with evolution.

KUENZLI M. and NORTH P.

Abstract (from CDS):

Calcium abundance in the atmosphere of Am stars is examined as a function of their evolutionary state within the main sequence. New spectroscopic abundances as well as abundances obtained photometrically by Guthrie (1987MNRAS.226..361G) are used, since they are mutually quite consistent. The main result of this work is that, contrary to earlier suggestions, calcium abundance does not tend to be larger in evolved Am stars than in unevolved ones, for objects distributed along a given evolutionary track in the HR diagram. The trend appears to be the reverse, if it is present at all. For our whole sample of Am stars, there is a significant correlation between calcium abundance and effective temperature, in the sense that the cooler objects are the most Ca-deficient, hance have the most pronounced Am peculiarity. This implies an apparent correlation between calcium deficiency and age, although the lack of Am stars younger than logt=8.6 seems real. Our results are fully consistent with the low rate of Am stars observed in young clusters and with theoretical predictions of time-dependent radiative diffusion (Alecian, 1996A&A...310..872A).

Abstract Copyright: ∼

Journal keyword(s): stars: chemically peculiar - stars: abundances - stars: evolution - stars: fundamental parameters

Simbad objects: 79

goto View the references in ADS

Number of rows : 79
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 861 SB* 00 13 12.7303696752 +62 02 27.159766728   6.83 6.622     A2m 51 0
2 * 28 And dS* 00 30 07.3651144632 +29 45 05.608065024   5.467 5.214     A7III 220 0
3 HD 3883 ** 00 41 36.0377718120 +24 37 44.448788316   6.333 6.046     kA5hF1mF2 127 0
4 * 39 And * 01 02 54.2547062352 +41 20 42.768780540   6.104 5.932     kA3hA7VmA9 78 0
5 V* V529 And gD* 01 27 26.6728869648 +41 06 04.177819368   6.711 6.425     A7m 89 0
6 HD 11408 PM* 01 53 48.5145386064 +55 35 51.498505428   6.620 6.437     A3III 60 0
7 HD 15385 Pe* 02 29 13.6822351464 +23 28 08.491382868 6.480 6.350 6.190     kA7IVmF2III/IVSr 66 0
8 * 16 Per dS* 02 50 35.0596652199 +38 19 07.114405802   4.57   4.0   F2III 128 0
9 HD 18557 * 02 58 47.3017174224 -09 46 35.398607628 6.47 6.35 6.15 5.96 5.85 A2II/III 62 0
10 * zet Eri SB* 03 15 50.0256861408 -08 49 11.036581032 5.11 5.03 4.80 4.59 4.47 kA4hA9mA9V 154 0
11 HD 20210 SB* 03 16 01.8603052344 +34 41 18.631390992   6.508 6.229     A1m 101 0
12 V* IW Per SB* 03 33 35.0341163808 +39 53 58.116630120   5.909 5.776     A3V 107 0
13 HD 23281 * 03 43 33.8338762320 -10 29 08.365157736 5.88 5.80 5.61 5.40 5.30 A5III-IV 95 0
14 HD 24141 SB* 03 53 43.2862495392 +57 58 30.526296888 7.92 5.967 5.786     kA3hF0mF0 83 0
15 HD 25425 * 04 06 38.8421288904 +65 31 14.873655684   6.294 6.131     A3m 52 0
16 * 60 Tau dS* 04 22 03.5181398136 +14 04 37.912925064   6.054 5.710 7.05 5.38 kA3hF2mF2(III) 288 0
17 * b Tau PM* 04 28 50.1636212976 +13 02 51.367198596   5.226 5.014 4.907 4.795 kA5hF0VmF0 214 0
18 * 81 Tau SB* 04 30 38.8891193184 +15 41 30.760430964   5.739 5.454 6.76   kA3hA8mF3 231 0
19 HD 30210 PM* 04 46 01.7404096416 +11 42 20.112329592   5.566 5.346     Am 175 0
20 * 4 Cam ** 04 48 00.2729226024 +56 45 25.836947712   5.519 5.275 5.1 5.08 A3m 85 0
21 HD 30453 SB* 04 49 19.0800954840 +32 35 17.491969320   6.086 5.824     A8m 77 0
22 HD 32428 Pe* 05 04 36.9158206992 +32 19 12.994519080   6.89 6.62     A4mF2 60 0
23 * h Ori SB* 05 09 19.6432730712 +09 49 46.502673924 5.83 5.67 5.43 5.25 5.13 A2m 263 0
24 HD 33204 SB* 05 09 45.0937327344 +28 01 49.686514248   6.296 5.997   5.69 A7VAm: 169 0
25 * mu. Aur ** 05 13 25.7220235464 +38 29 04.195617900   5.017 4.821     A4m 106 0
26 HD 36484 PM* 05 33 27.4039937208 +32 48 04.251804660   6.578 6.474     A2m 49 0
27 * 34 Cam PM* 05 59 45.8240921256 +55 19 15.074856444   6.719 6.410     A5m 40 0
28 HD 42954 ** 06 14 28.58291 +17 54 22.8573     8.53 7.20   A6m 86 0
29 V* RR Lyn SB* 06 26 25.8366305040 +56 17 06.346261104   5.76 5.54     kA3hA7VmF2 221 0
30 HD 50643 * 06 53 21.8411163864 -18 55 58.230974460   6.292 6.123     A3III 45 0
31 HD 60652 * 07 37 53.8487778744 +48 46 25.835752740   6.138 5.906     A5m 59 0
32 HD 63589 V* 07 51 02.3572752000 +33 14 01.151159604   6.206 6.041     A2m 60 0
33 HD 67317 SB* 08 10 12.5666912856 +55 48 15.542318880   7.85 7.57     A2 45 0
34 HD 71267 * 08 25 55.5900555648 -14 55 46.780356504   6.120 5.951     A3(m)A3-A7 44 0
35 * 2 Hya EB* 08 26 27.2059310314 -03 59 14.749144878   5.809 5.590     F0VmA6 101 0
36 * 2 UMa PM* 08 34 36.1798933008 +65 08 42.407069532   5.655 5.453     kA3hA5mA7s 80 0
37 HD 74190 * 08 42 09.8122411248 -11 57 57.622869216   6.603 6.449     A3III/IV 33 0
38 * f UMa PM* 09 08 52.2569720765 +51 36 16.731901694 4.87 4.75 4.48 4.21 4.10 kA3VmF5IIISr 163 0
39 * 21 Hya SB* 09 12 26.0504794680 -07 06 35.299400796   6.328 6.098     A0mA5/7-F0 131 0
40 HD 83886 PM* 09 43 06.9450161064 +54 21 49.323213972   6.589 6.477     A5m 51 0
41 HD 84607 PM* 09 46 23.6104785936 +01 47 08.116038312   5.978 5.640     F0/2IV 63 0
42 HD 88182 * 10 09 56.4865424304 -12 05 43.099133604   6.417 6.230     A5III 42 0
43 HD 88295 * 10 16 17.2009515984 +78 56 49.139220984   6.936 6.842     A0 26 0
44 HD 88849 PM* 10 17 50.5502610456 +71 03 38.506198104   6.933 6.610     A7m 67 0
45 * 41 Sex SB* 10 50 18.0563876088 -08 53 51.953777484   5.949 5.791     A2/3III 81 0
46 HD 95256 PM* 11 01 05.6576405640 +63 25 15.952075752   6.536 6.358     A2m 40 0
47 HD 99859 PM* 11 29 43.5634989960 +56 44 15.266509872   6.435 6.278     A5V 57 0
48 HD 100518 ** 11 34 09.94791 +11 01 25.9054   6.73 6.55     kA2hA5IIImA6 61 0
49 HD 102660 SB* 11 49 14.7884462016 +16 14 34.368797004   6.314 6.036   5.75 kA2.5hF1mF3 93 0
50 HD 102910 PM* 11 50 55.3412608728 +12 16 44.531104440   6.634 6.367     A5m 59 0
51 * 12 Vir PM* 12 13 25.9392594264 +10 15 44.422934616   6.095 5.829   5.61 kA3hF2mF2 82 0
52 HD 108642 SB* 12 28 38.1501425400 +26 13 37.021090692   6.71 6.54     A1IV-VSrSi 154 0
53 HD 108651 SB* 12 28 44.5650287472 +25 53 57.557921208   6.82 6.61     kA2hA9VmF0 174 0
54 V* NO Com SB* 12 41 07.7620315824 +30 26 13.635976452   7.21 6.94     A6V 72 0
55 * d02 Vir dS* 12 45 37.0584628548 +07 40 23.969843174   5.525 5.207     F0IIIm 163 0
56 * 11 CVn PM* 12 48 41.8031339664 +48 28 00.625838016   6.427 6.245     kA6hA7VmF3 56 0
57 HD 116303 PM* 13 22 03.9227881872 +43 54 12.126308436   6.585 6.332     A7m 45 0
58 * f Boo PM* 14 26 27.3650870400 +19 13 36.838844688   5.637 5.394     kA7hA8mF2(III)((Sr)) 128 0
59 HD 135775 * 15 16 35.8092140328 +09 42 46.815424920   7.081 6.727     kA5hA9mF5(II) 43 0
60 HD 136403 SB* 15 19 30.0477798600 +32 30 53.642993616   6.544 6.311     A2m 84 0
61 HD 138213 SB* 15 28 44.3918461272 +47 12 05.436520740   6.231 6.138     A2IV 65 0
62 * tau07 Ser ** 15 41 54.7165814280 +18 27 50.531406696   5.994 5.792   5.61 A8Vam 98 0
63 * 14 Oph PM* 16 41 42.4819345392 +01 10 52.431236076   6.045 5.724     F2V 72 0
64 * nu.02 Dra SB* 17 32 16.0425231528 +55 10 22.505264940       4.7   kA4hF2VmF3 153 0
65 HD 166960 * 18 13 09.9996912096 -04 00 41.795196588   6.839 6.574     A2mA5/7-F2 51 0
66 HD 169885 * 18 23 47.9780313768 +53 18 03.008504124   6.512 6.352     A3m 48 0
67 HD 172741 ** 18 40 12.2008158960 +38 22 01.833952764   6.711 6.489     A6m 39 0
68 * zet01 Lyr SB* 18 44 46.3570814856 +37 36 18.437952174 4.71 4.55 4.36 4.21 4.13 kA5hF0VmF3 203 0
69 HD 183262 PM* 19 28 06.3117702264 +17 50 48.084003564   7.185 6.867     Am 36 0
70 HD 190401 * 20 03 09.0932376960 +41 28 28.050202056   7.334 6.984     Am 38 0
71 HD 193472 * 20 20 00.1886565264 +13 32 53.118564252   6.251 5.938     A5m 63 0
72 HD 195217 * 20 29 21.1435683960 +20 05 15.716576184   6.793 6.561     kA3hA7mA7 54 0
73 * mu. Aqr SB* 20 52 39.2308475831 -08 58 59.978621295   5.04 4.72     A3II 123 0
74 V* IK Peg dS* 21 26 26.6611049976 +19 22 32.310190344   6.294 6.064     kA6hA9mF0+DA 204 0
75 * 32 Aqr SB* 22 04 47.4224193480 -00 54 22.839762708   5.519 5.271     A5IV 185 0
76 V* GX Peg SB* 22 31 34.3513897128 +29 32 33.935492760 6.630 6.520 6.330     kA6hA8mA8 99 0
77 * 14 Psc PM* 23 34 09.0149355936 -01 14 51.220689108   6.193 5.870     A2II 73 0
78 HD 222377 PM* 23 39 55.0403676432 +09 40 38.269210800   6.178 5.960     A2m 55 0
79 * 79 Peg PM* 23 49 39.3948077808 +28 50 32.602140996 6.270 6.140 5.960     A2m 65 0

To bookmark this query, right click on this link: simbad:objects in 1998A&A...330..651K and select 'bookmark this link' or equivalent in the popup menu