2006A&A...458..417M


Query : 2006A&A...458..417M

2006A&A...458..417M - Astronomy and Astrophysics, volume 458, 417-426 (2006/11-1)

Probing isotopic ratios at z = 0.89: molecular line absorption in front of the quasar PKS 1830-211.

MULLER S., GUELIN M., DUMKE M., LUCAS R. and COMBES F.

Abstract (from CDS):

With the Plateau de Bure interferometer, we have measured the C, N, O and S isotopic abundance ratios in the arm of a spiral galaxy with a redshift of 0.89. The galaxy is seen face-on according to HST images. Its bulge intercepts the line of sight to the radio-loud quasar PKS 1830-211, giving rise at mm wavelengths to two Einstein images located each behind a spiral arm. The arms appear in absorption in the lines of several molecules, giving the opportunity to study the chemical composition of a galaxy only a few Gyr old. The isotopic ratios in this spiral galaxy differ markedly from those observed in the Milky Way. The 17O/18O and 14N/15N ratios are low, as one would expect from an object too young to let low mass stars play a major role in the regeneration of the gas.

Abstract Copyright:

Journal keyword(s): quasars: individual: PKS 1830-211 - quasars: absorption lines - astrochemistry - galaxies: ISM - abundances - ISM: molecules - ISM: abundances

Simbad objects: 15

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Number of rows : 15
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 ~ 3173 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   ~ 532 3
4 IC 342 SBG 03 46 48.514 +68 05 45.98   10.5       ~ 1462 1
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16388 1
6 IRC +10216 C* 09 47 57.40632 +13 16 43.5648           C9,5e 2262 0
7 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5654 6
8 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 5613 1
9 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1389 2
10 3C 345 QSO 16 42 58.8102993888 +39 48 37.002763188   16.81 16.59 16.84   ~ 1646 2
11 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13306 0
12 4C 09.57 BLL 17 51 32.8186120872 +09 39 00.728629416   17.46 16.78 15.57   ~ 892 1
13 QSO B1830-211B LeQ 18 33 39.822 -21 03 40.47           ~ 19 1
14 QSO B1830-211A LeQ 18 33 39.871 -21 03 39.78           ~ 19 1
15 QSO B1830-211 Bla 18 33 39.9399138048 -21 03 39.368838780     18.70 21   ~ 623 1

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2022.11.28-13:28:51

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