2016A&A...595A..96W


Query : 2016A&A...595A..96W

2016A&A...595A..96W - Astronomy and Astrophysics, volume 595A, 96-96 (2016/11-1)

Isotopic ratios at z = 0.68 from molecular absorption lines toward B 0218+357.

WALLSTROM S.H.J., MULLER S. and GUELIN M.

Abstract (from CDS):

Isotopic ratios of heavy elements are a key signature of the nucleosynthesis processes in stellar interiors. The contribution of successive generations of stars to the metal enrichment of the Universe is imprinted on the evolution of isotopic ratios over time. We investigate the isotopic ratios of carbon, nitrogen, oxygen, and sulfur through millimeter molecular absorption lines arising in the z=0.68 absorber toward the blazar B 0218+357. We find that these ratios differ from those observed in the Galactic interstellar medium, but are remarkably close to those in the only other source at intermediate redshift for which isotopic ratios have been measured to date, the z=0.89 absorber in front of PKS 1830-211. The isotopic ratios in these two absorbers should reflect enrichment mostly from massive stars, and they are indeed close to the values observed toward local starburst galaxies. Our measurements set constraints on nucleosynthesis and chemical evolution models.

Abstract Copyright: © ESO 2016

Journal keyword(s): quasars: absorption lines - quasars: individual: B 0218+357 - galaxies: ISM - galaxies: abundances - ISM: molecules - radio lines: galaxies

VizieR on-line data: <Available at CDS (J/A+A/595/A96): sp-c34s.dat sp-cs.dat sp-h13cn.dat sp-h13co.dat sp-h234s.dat sp-h2s.dat sp-hc15n.dat sp-hc17o.dat sp-hc18o.dat sp-hcn.dat sp-hco.dat>

Simbad objects: 19

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Number of rows : 19
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3194 2
2 [PBK93] B0218+357 G G 02 21 +35.9           ~ 25 1
3 QSO B0218+357 QSO 02 21 05.4920852208 +35 56 13.848581904   20.0 20.0 19.60   ~ 534 3
4 UGCA 39 GiG 02 41 55.092 +59 36 14.73   16       ~ 341 1
5 3C 84 Sy2 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 3858 3
6 LHA 120-N 113 HII 05 13 21.7 -69 21 33           ~ 108 1
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16512 1
8 IRC +10216 C* 09 47 57.40632 +13 16 43.5648           C9,5e 2275 0
9 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5678 6
10 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1398 2
11 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2456 2
12 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2872 4
13 NAME NGC 6334 I(N) smm 17 20 54 -35 45.0           ~ 141 1
14 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13437 0
15 QSO B1830-211 Bla 18 33 39.9399138048 -21 03 39.368838780     18.70 21   ~ 628 1
16 EM* MWC 349 ** 20 32 45.499080 +40 39 36.74124   15.88 13.15 12.13   Bep 771 0
17 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2427 2
18 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 2728 2
19 NAME Galactic Bulge reg ~ ~           ~ 4012 0

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2023.02.01-07:19:45

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