2013A&A...558A..31L


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.10CEST02:14:54

2013A&A...558A..31L - Astronomy and Astrophysics, volume 558A, 31-31 (2013/10-1)

Galactic abundance gradients from Cepheids. α and heavy elements in the outer disk.

LEMASLE B., FRANCOIS P., GENOVALI K., KOVTYUKH V.V., BONO G., INNO L., LANEY C.D., KAPER L., BERGEMANN M., FABRIZIO M., MATSUNAGA N., PEDICELLI S., PRIMAS F. and ROMANIELLO M.

Abstract (from CDS):

Galactic abundance gradients set strong constraints to chemo-dynamical evolutionary models of the Milky Way. Given the period-luminosity relations that provide accurate distances and the large number of spectral lines, Cepheids are excellent tracers of the present-day abundance gradients. We want to measure the Galactic abundance gradient of several chemical elements. While the slope of the Cepheid iron gradient did not vary much from the very first studies, the gradients of the other elements are not that well constrained. In this paper we focus on the inner and outer regions of the Galactic thin disk. We use high-resolution spectra (FEROS, ESPADONS, NARVAL) to measure the abundances of several light (Na, Al), α (Mg, Si, S, Ca), and heavy elements (Y, Zr, La, Ce, Nd, Eu) in a sample of 65 Milky Way Cepheids. Combining these results with accurate distances from period-Wesenheit relations in the near-infrared enables us to determine the abundance gradients in the Milky Way. Our results are in good agreement with previous studies on either Cepheids or other tracers. In particular, we confirm an upward shift of ≃0.2dex for the Mg abundances, as has recently been reported. We also confirm the existence of a gradient for all the heavy elements studied in the context of a local thermodynamic equilibrium analysis. However, for Y, Nd, and especially La, we find lower abundances for Cepheids in the outer disk than reported in previous studies, leading to steeper gradients. This effect can be explained by the differences in the line lists used by different groups. Our data do not support a flattening of the gradients in the outer disk, in agreement with recent Cepheid studies and chemo-dynamical simulations. This is in contrast to the open cluster observations but remains compatible with a picture where the transition zone between the inner disk and the outer disk would move outward with time.

Abstract Copyright:

Journal keyword(s): stars: abundances - supergiants - stars: variables: Cepheids - Galaxy: abundances - Galaxy: evolution - Galaxy: disk

Simbad objects: 74

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Number of rows : 74

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10904 1
2 NGC 300 GiG 00 54 53.4460065856 -37 41 03.182962667 8.83 8.69 8.13 7.46   ~ 1306 2
3 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5135 1
4 V* BK Aur cC* 05 10 40.2294213078 +49 41 15.400106615   10.40 9.42     F8 70 0
5 V* SY Aur cC* 05 12 39.2271412155 +42 49 54.415802821   9.97 9.05   7.851 F5III 113 0
6 V* YZ Aur cC* 05 15 21.9827122069 +40 04 40.883139360   11.77 10.24     G5 91 0
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14832 1
8 V* Y Aur cC* 05 28 39.2385752080 +42 26 15.843671650   10.53 9.74     F5 83 0
9 V* ST Tau cC* 05 45 03.1601683809 +13 34 34.903166002   9.13 7.79   7.149 G0 115 0
10 V* AV Tau cC* 05 45 44.9162366630 +27 04 04.459560907   13.70       ~ 34 0
11 V* AX Aur cC* 05 46 50.8150368229 +31 35 52.507874209   13.54       ~ 33 0
12 V* AO Aur cC* 05 47 45.0529654365 +32 00 52.719751503   11.33 10.44     F5 42 0
13 V* RZ Gem cC* 06 02 36.5872523443 +22 14 02.947734335   10.83 9.91 9.68 8.679 F5 108 0
14 V* AA Gem cC* 06 06 34.9459286635 +26 19 45.205210801   11.0 9.91   8.540 K0 107 0
15 V* CS Ori cC* 06 07 25.4652004933 +11 09 07.113683832   11.96 11.29     F5 65 0
16 V* SV Mon cC* 06 21 26.3051049461 +06 28 12.577938993   9.32 8.28     G1Ib 155 0
17 V* RS Ori cC* 06 22 13.1927222060 +14 40 41.253685672   9.34 8.42   7.270 F4Ib 124 0
18 V* WW Mon cC* 06 33 37.1817036531 +09 12 12.840769070   13.65       F6 55 0
19 V* V495 Mon cC* 06 37 03.3837974248 -02 49 26.756611872   13.69       ~ 38 0
20 V* CV Mon cC* 06 37 04.8448658715 +03 03 50.276498200   11.32 9.90   8.631 ~ 212 1
21 V* BE Mon cC* 06 40 05.5823302469 +07 36 20.987932485   11.6 10.5     G5 71 0
22 V* AD Gem cC* 06 43 07.5116892124 +20 56 20.801766765   10.42 9.80   9.044 F5 91 0
23 V* V508 Mon cC* 06 47 09.3999270974 +03 58 01.550964840   11.50 10.53     ~ 61 0
24 V* V510 Mon cC* 06 47 26.9330231896 +02 31 01.444805612   14.13       ~ 33 0
25 V* TW Mon cC* 06 50 32.3362879535 +00 00 25.185938999         10.939 ~ 39 0
26 V* TX Mon cC* 06 50 52.2687185541 -01 25 45.221461613   11.76 10.67   9.619 F6 86 0
27 V* XX Mon cC* 06 52 12.1699029474 -02 48 25.053620849   12.81 11.52     F6 64 0
28 V* EK Mon cC* 06 52 46.1708000904 -02 27 29.629893719   11.87 11.29     ~ 59 0
29 V* TY Mon cC* 06 56 39.7965268829 +00 11 24.143096639   12.90     10.347 K5 39 0
30 V* BV Mon cC* 06 56 51.0856174304 +04 30 58.275526470   12.44 11.38     ~ 36 0
31 V* TZ Mon cC* 06 58 00.9347614861 -00 22 33.463317717   11.8       F6 77 0
32 V* UY Mon cC* 06 58 50.3176103311 +09 37 21.838154223   9.89 9.37     F8II 67 0
33 V* RY CMa cC* 07 16 37.6358131162 -11 29 14.298952423   8.99 8.19   7.133 F8Ib/II 140 0
34 V* RZ CMa cC* 07 21 32.8572494264 -16 41 14.000346928   10.75 9.72   8.477 F6 80 0
35 V* TW CMa cC* 07 22 02.3794845665 -14 19 05.497464410   10.40 9.59   8.429 F5 86 0
36 V* AO CMa cC* 07 24 40.5915853513 -26 11 18.607881826           ~ 24 0
37 V* VX Pup Ce* 07 32 36.6488974993 -21 55 49.531917879   9.87 9.32 8.97   F3IV 125 0
38 * y03 Pup cC* 07 38 18.2087613998 -48 36 05.159134325   6.314 5.658 6.94   F7Ib/II 101 0
39 V* VZ Pup cC* 07 38 35.2380584126 -28 29 58.597876520   9.73 8.98     F7.5 126 0
40 V* WX Pup cC* 07 41 59.0037016642 -25 52 34.251072461   9.99 9.09   7.944 G0 94 0
41 V* AD Pup cC* 07 48 03.8513966553 -25 34 40.023144556   10.81 9.99     F8 88 0
42 V* HW Pup cC* 07 57 42.1676771396 -27 36 06.840883085   13.35     10.51 ~ 45 0
43 V* AP Pup cC* 07 57 45.6728882268 -40 07 24.079693723   8.13 7.37   6.462 F8II 110 0
44 V* AQ Pup cC* 07 58 22.0887170720 -29 07 48.335325928   9.70 8.54   7.175 F5-G2Ib 173 0
45 V* BN Pup cC* 08 06 21.4748690781 -30 05 48.768197196   10.99 9.75 8.97 8.981 G4 103 1
46 V* AX Vel cC* 08 10 49.3237950601 -47 41 54.827371638   8.78 8.16     F6II 112 0
47 V* AH Vel cC* 08 11 59.9670207132 -46 38 39.656138625   6.35 5.76     F7Ib/II 158 0
48 V* AT Pup cC* 08 12 22.4032077457 -36 56 37.530066706   8.83 8.07   7.085 F5 114 0
49 V* RS Pup cC* 08 13 04.2157137938 -34 34 42.691837063 8.89 8.00 6.70   5.453 F8Iab 315 0
50 V* V Car cC* 08 28 43.6942334868 -60 07 21.267286180   8.14 7.31   6.432 F8Ib/II 122 0
51 V* RZ Vel cC* 08 37 01.3029337589 -44 06 52.844429407   8.507 7.260     G1Ib 195 0
52 V* T Vel cC* 08 37 40.8268486937 -47 21 43.082343785   8.92 7.68   6.970 G0II 146 0
53 V* SW Vel cC* 08 43 38.6904013543 -47 24 11.196771088   9.58 8.32     F8/G0Ib 167 0
54 V* SX Vel cC* 08 44 53.4688984489 -46 20 34.732806621   9.19 8.33   7.264 F8II 114 0
55 V* ST Vel cC* 08 44 55.8932351877 -50 33 36.140752245   10.89 9.69   8.294 K 63 0
56 V* BG Vel cC* 09 08 15.7486417373 -51 26 10.604860930   8.82 7.69   6.337 F7/8II 100 0
57 V* V Vel cC* 09 22 16.1681614743 -55 57 37.150827133   8.29 7.57   6.695 F8II 121 0
58 V* EZ Vel cC* 09 25 07.3812190007 -53 12 35.558567086           ~ 39 0
59 V* DR Vel cC* 09 31 40.9750564992 -49 39 18.019202295   10.50 9.25     ~ 69 0
60 * l Car cC* 09 45 14.8112246 -62 30 28.451894   4.33 3.40     G5Iab/b 286 1
61 V* V397 Car cC* 10 00 03.6928250252 -66 16 34.475151549   9.07 8.29     F8Ib/II 39 0
62 V* RY Vel cC* 10 20 41.0317627466 -55 19 17.035924264   9.71 7.86   6.840 F5Ib/II 129 0
63 V* AQ Car cC* 10 21 22.9755883634 -61 04 26.734361226   9.73 8.84     F8/G0Ib 95 0
64 V* UX Car cC* 10 29 11.2428716500 -57 36 48.245099584 9.81 9.36 8.62   7.559 F2II 118 0
65 V* VY Car cC* 10 44 32.6908129391 -57 33 55.326019898 8.12 7.70 6.87   6.299 F7Iab/b 193 0
66 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2229 2
67 V* V340 Ara cC* 16 45 19.1122888146 -51 20 33.394152547   11.39 10.03     ~ 63 0
68 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11540 0
69 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 1909 1
70 V* AV Sgr cC* 18 04 48.7864032131 -22 43 56.645836757   13.39     10.595 ~ 56 0
71 V* VY Sgr cC* 18 12 04.5660706883 -20 42 14.465377948   12.70 11.36     F6 62 0
72 V* UZ Sct cC* 18 31 22.3666774568 -12 55 43.338736715   13.23 10.91   9.195 G0 75 0
73 NGC 7793 GiG 23 57 49.7533807411 -32 35 27.708304655 10.26 9.74 9.28 9.06 9.7 ~ 922 2
74 NAME Local Group GrG ~ ~           ~ 6973 0

    Equat.    Gal    SGal    Ecl

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2020.07.10-02:14:54

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