2009A&A...508L..17R


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.24CET19:45:41

2009A&A...508L..17R - Astronomy and Astrophysics, volume 508, L17-20 (2009/12-2)

Accurate abundance patterns of solar twins and analogs. Does the anomalous solar chemical composition come from planet formation?

RAMIREZ I., MELENDEZ J. and ASPLUND M.

Abstract (from CDS):

We derive the abundance of 19 elements in a sample of 64 stars with fundamental parameters very similar to solar, which minimizes the impact of systematic errors in our spectroscopic 1D-LTE differential analysis, using high-resolution (R≃60000), high signal-to-noise ratio (S/N≃200) spectra. The estimated errors in the elemental abundances relative to solar are as small as ≃0.025dex. The abundance ratios [X/Fe] as a function of [Fe/H] agree closely with previously established patterns of Galactic thin-disk chemical evolution. Interestingly, the majority of our stars show a significant correlation between [X/Fe] and condensation temperature (TC). In the sample of 22 stars with parameters closest to solar, we find that, on average, low TC elements are depleted with respect to high TC elements in the solar twins relative to the Sun by about 0.08dex (≃20%). An increasing trend is observed for the abundances as a function of TC for 900<TC<1800K, while abundances of lower TC elements appear to be roughly constant. We speculate that this is a signature of the planet formation that occurred around the Sun but not in the majority of solar twins. If this hypothesis is correct, stars with planetary systems like ours, although rare (frequency of ≃15%), may be identified through a very detailed inspection of the chemical compositions of their host stars.

Abstract Copyright:

Journal keyword(s): stars: abundances - Sun: abundances - planetary systems

VizieR on-line data: <Available at CDS (J/A+A/508/L17): table1.dat abund.dat>

Simbad objects: 65

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Number of rows : 65

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HD 225194 PM* 00 04 21.5023504495 +12 57 26.262029504   9.26   8.2   G5 29 0
2 HD 804 PM* 00 12 28.3340590163 +20 14 03.652225321       7.8   G5 44 0
3 HD 1461 PM* 00 18 41.8673684261 -08 03 10.805762856   7.14 6.46     G3VFe0.5 324 1
4 HD 236416 PM* 00 27 01.9763031018 +60 24 10.124053446   9.56   8.6   G5 21 0
5 BD+48 182 PM* 00 36 43.3715619022 +48 49 41.821634201   9.30 8.67     G0 17 0
6 HD 6204 * 01 02 57.4204868552 -09 51 40.460185331   9.17 8.53     G3V 36 0
7 HD 6470 * 01 05 42.9050450435 +02 28 37.618101019   9.55 8.91     G3V 20 0
8 HD 8291 PM* 01 22 18.7218217766 +03 30 47.255876676       8.3   G5V 39 0
9 HD 9446 PM* 01 33 20.1848210075 +29 15 54.538987330   9.03   8.0   G5V 54 1
10 HD 11195 * 01 49 42.9210363773 -18 56 09.842522100   9.54 8.91     G5V 34 0
11 BD-13 347 PM* 01 53 40.7975363412 -13 15 00.151763247   9.95 9.22     G5 18 0
12 HD 12264 PM* 02 00 05.3380960261 -13 32 46.000032697   8.64 7.98     G5V 52 0
13 BD+18 289 PM* 02 17 55.5457610018 +19 40 50.029768948   9.54 8.91     G0 20 0
14 HD 15632 PM* 02 31 24.1684705040 +22 05 14.896302129       7.6   G0 41 0
15 HD 16008 PM* 02 33 49.0263031764 -19 36 42.500345899   9.24 8.58     G5V 47 0
16 HD 19518 PM* 03 08 44.3072760070 +15 20 05.385636983 8.590 8.460   7.4   G8V 53 0
17 * iot Per PM* 03 09 04.0198629 +49 36 47.799638 4.76 4.64   3.7   G0V 508 0
18 HD 24552 PM* 03 54 22.6333195854 +01 15 41.830080016   8.58 7.97     G1V 44 0
19 V* RV Tau Mi* 04 47 06.7238218181 +26 10 45.530144720   11.00 9.80     K0 268 0
20 BD+66 355 PM* 04 50 52.6203798651 +67 10 00.425600912       9.1   G0 26 0
21 * m Tau ** 05 07 27.0060371376 +18 38 42.179937542 5.79 5.65   4.5   G4V 254 0
22 HD 36152 PM* 05 28 59.1280208092 -17 25 45.265979943   8.95 8.27     G5V 55 0
23 HD 40620 PM* 05 59 16.5466711878 -17 53 59.227889895   9.64 8.99     G3V 20 0
24 HD 63487 PM* 07 48 05.9777994162 -27 31 10.672850923   9.82 9.20     G2V 38 0
25 HD 63433 BY* 07 49 55.0604326704 +27 21 47.458599312   7.59 6.91     G5IV 114 0
26 * pi.01 UMa BY* 08 39 11.7043265307 +65 01 15.268273190 6.33 6.26 5.64 5.12 4.79 G0.5V 526 0
27 HD 77006 PM* 09 01 37.0374845392 +49 44 12.581447295       7.5   G5 39 0
28 HD 80533 PM* 09 23 39.5978481830 +66 08 14.137385924   9.57 8.92     G0 19 0
29 BD+30 1962 PM* 10 07 10.2403251236 +29 27 22.715406401       8.9   G2 24 0
30 HD 88072 PM* 10 09 23.4290742733 +02 22 15.899376519       7.2   G3V 82 0
31 HD 91909 PM* 10 37 59.5715835718 +54 53 14.493185866   9.84 9.17     G0 23 0
32 HD 92074 * 10 39 05.8585598972 +55 30 44.962807294 9.470 9.280 8.640     G0 24 0
33 HD 98618 PM* 11 21 29.0694769107 +58 29 03.704275968   8.303 7.651     G5V 67 0
34 HD 101364 PM* 11 40 28.4842891594 +69 00 30.600485781   9.32 8.67     G5 66 0
35 * 61 UMa PM* 11 41 03.0159358291 +34 12 05.882438337 6.31 6.08 5.34 4.73 4.38 G8V 574 0
36 HD 107633 PM* 12 22 02.5259961633 +34 15 20.394221734   9.40   8.4   G6V 22 0
37 HD 110869 PM* 12 44 28.9858472365 +58 41 27.344310486       7.6   G5V 39 0
38 HD 114174 ** 13 08 51.0231461021 +05 12 26.064930541   7.47   6.3   G3IV+D 147 0
39 HD 114826 PM* 13 13 13.0447404594 -08 55 54.218248829   9.59 8.90     G3/5V 29 0
40 HD 115382 PM* 13 16 48.3684473903 +12 24 55.552125011   9.02   8.0   G5 38 0
41 * ksi Boo BY* 14 51 23.37993 +19 06 01.6994 5.618 5.370 4.593 3.91 3.48 G7Ve+K5Ve 438 0
42 HD 133600 PM* 15 05 13.2481747000 +06 17 23.691579336       7.8   G0 43 0
43 HD 134902 PM* 15 11 37.0759941129 +24 13 58.478216413   9.53 8.85     G0 20 0
44 BD+46 2115 PM* 15 48 58.5420519626 +45 47 37.330265810   9.86   8.8   G2: 29 0
45 BD+37 2687 PM* 15 55 56.7856626185 +36 43 22.311863341       8.3   G5 20 0
46 HD 144270 PM* 16 03 42.8284799351 +34 00 46.707993424   8.85 8.22     F8 24 0
47 HD 145514 PM* 16 09 41.1792755968 +40 07 08.635589941       7.9   G0 33 0
48 * 18 Sco PM* 16 15 37.2703721200 -08 22 09.981989277   6.15 5.50     G2Va 500 0
49 BD+45 2434 PM* 16 38 59.2167794495 +45 35 22.481402881       8.8   G5 18 0
50 V* V2213 Oph BY* 17 05 16.8186294192 +00 42 09.217571716   6.59   5.6   F8.5IV-V 320 0
51 HD 164595 PM* 18 00 38.8946598123 +29 34 18.922470861   7.72   6.7   G2V 89 0
52 BD+35 3136 PM* 18 03 12.8684133508 +35 58 05.608986406       8.9   G0 17 0
53 HD 238838 PM* 18 15 15.2553486692 +59 49 36.210748979   9.50 8.81     G5 16 0
54 * 16 Cyg A ** 19 41 48.9539315338 +50 31 30.218780803 6.79 6.59 5.95 5.50 5.17 G1.5Vb 689 1
55 * 16 Cyg B PM* 19 41 51.9731830550 +50 31 03.086127222 7.07 6.86 6.20 5.76 5.42 G3V 810 1
56 HD 195034 PM* 20 28 11.8155584127 +22 07 44.367004336       6.7   G5 72 0
57 HD 197027 PM* 20 41 54.6337513102 -27 12 57.415448921   9.80 9.15     G3V 55 0
58 HD 201422 PM* 21 10 07.9267626048 -24 49 23.180015241   9.19 8.53     G5V 32 0
59 V* HN Peg BY* 21 44 31.3299733695 +14 46 18.982331039       6.16   G0V+ 459 0
60 HD 209096 PM* 22 01 14.7195322612 -19 18 45.828443731   9.59 8.94     G5V 23 0
61 HD 209562 * 22 04 49.7315427174 -23 43 46.504104021   9.53 8.89     G3V 23 0
62 BD+24 4563 PM* 22 15 54.6539905707 +24 55 40.790676149       8.5   G0 37 0
63 * 51 Peg Ro* 22 57 27.9804167474 +20 46 07.782240714 6.39 6.16 5.46 4.97 4.61 G2IV 1089 1
64 BD+69 1329 PM* 23 25 06.0187878793 +69 56 59.271742501       8.8   K0 20 0
65 HD 224448 * 23 58 04.5372070362 -00 07 41.496275808   9.61 9.01     G5V 22 0

    Equat.    Gal    SGal    Ecl

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2021.02.24-19:45:41

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