NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-24 T09:23:28 PDT
Help | Comment | NED Home

For refcode 2001A&A...373...56P:
Retrieve 5 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
2001A&A...373...56P The oxygen abundance distribution in M 101. PILYUGIN L.S. Received 15 March 2001/Accepted 23 April 2001 Abstract. The well-observed spiral galaxy M 101 was considered. The radial distributions of oxygen abundances determined in three different ways (with the classic T_e_-method, with the R_23_-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)_T_e_ abundance distribution. The parameters of the (O/H)_R_23_ abundance distribution differ significantly from those of the (O/H)_T_e_ abundance distribution: the central (O/H)_R_23_ 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)_T_e_ abundance distribution. The dispersion in (O/H)_P_ abundance at fixed radius is rather small, ~0.08 dex, and is equal to that in (O/H)_T_e_ abundance. The dispersion in (O/H)_R_23_ abundance at fixed radius is appreciably larger, ~0.16dex, compared to that in (O/H)_T_e_ abundance. It has been shown that the extra dispersion in (O/H)_R_23_ abundances is an artifact and reflects scatter in excitation parameter P at fixed radius. Key words: galaxies: abundances - galaxies: ISM - galaxies: spiral - galaxies: individual: M 101
Retrieve 5 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home