2001A&A...373...56P


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.22CEST14:12:39

2001A&A...373...56P - Astronomy and Astrophysics, volume 373, 56-62 (2001/7-1)

The oxygen abundance distribution in M 101.

PILYUGIN L.S.

Abstract (from CDS):

The well-observed spiral galaxy M 101 was considered. The radial distributions of oxygen abundances determined in three different ways (with the classic Te-method, with the R23-method, and with the P-method) were compared. It was found that the parameters (the central oxygen abundance and the gradient) of the radial (O/H)P abundance distribution are close to those of the (O/H)Te abundance distribution. The parameters of the (O/H)R23 abundance distribution differ significantly from those of the (O/H)Te abundance distribution: the central (O/H)R23 oxygen abundance is higher by around 0.4dex and the gradient is steeper by a factor of around 1.5 as compared to those values in the (O/H)Te abundance distribution. The dispersion in (O/H)P abundance at fixed radius is rather small, ∼0.08dex, and is equal to that in (O/H)Te abundance. The dispersion in (O/H)R23 abundance at fixed radius is appreciably larger, ∼0.16dex, compared to that in (O/H)Te abundance. It has been shown that the extra dispersion in (O/H)R23 abundances is an artifact and reflects scatter in excitation parameter P at fixed radius.

Abstract Copyright:

Journal keyword(s): galaxies: abundances - galaxies: ISM - galaxies: spiral - galaxies: individual: M 101

Simbad objects: 11

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Number of rows : 11

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 [VSH98] NGC 5457 -459-053 HII 14 02 20.0183 +54 20 02.000           ~ 5 0
2 [VSH98] NGC 5457 -398-436 HII 14 02 27.1104 +54 13 39.000           ~ 3 0
3 NGC 5447 HII 14 02 28.0 +54 16 34           ~ 68 0
4 [VSH98] NGC 5457 -347+276 HII 14 02 32.7359 +54 25 31.000           ~ 4 0
5 [HBS84] 29 HII 14 02 54.200 +54 22 25.56           ~ 35 0
6 NGC 5455 H2G 14 03 01.17 +54 14 29.4           ~ 96 0
7 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2563 2
8 [VSH98] NGC 5457 +010+885 HII 14 03 13.6507 +54 35 40.000           ~ 3 0
9 NGC 5461 HII 14 03 40.96 +54 19 02.4           ~ 177 0
10 NGC 5471 EmG 14 04 28.627 +54 23 52.84           ~ 231 1
11 MRS NGC 5457 (+0252-0107) HII ~ ~           ~ 2 0

    Equat.    Gal    SGal    Ecl

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2020.09.22-14:12:39

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