2D surface brightness modelling of large 2MASS galaxies – I : Photometry and structural parameters
| Autor: | Emmanuel Ríos-López, Gabriela Iacobuta, Hector Ibarra-Medel, Mabel Valerdi, Omar López-Cruz, Joaquín Alvira-Enríquez, C. Añorve |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Galaxies: fundamental parameters
Cosmology and Nongalactic Astrophysics (astro-ph.CO) structure [Galaxies] FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Concentration indices Photometry (optics) bulges [Galaxies] Galaxies: structure Surface brightness Scaling Report.total Astrophysics::Galaxy Astrophysics Physics Supermassive black hole Galaxies: bulges WIMEK photometric [Techniques] Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies Galaxy Environmental Systems Analysis Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Milieusysteemanalyse fundamental parameters [Galaxies] Techniques: photometric Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society, 507(4), 5952-5973 Monthly Notices of the Royal Astronomical Society 507 (2021) 4 |
| ISSN: | 0035-8711 |
| Popis: | We have studied a sample of 101 bright 2MASS galaxies from the Large Galaxy Atlas (LGA), whose morphologies span from early to late-types. We have generated estimates for structural parameters through a two-dimensional (2D) surface brightness photometric decomposition in the three 2MASS bands (J, H, Ks). This work represents a detailed multi-component photometric study of nearby galaxies. We report total magnitudes, effective radii, concentration indices, among other parameters, in the three 2MASS bands. We found that the integrated total magnitudes of early-type galaxies (ETGs) measured on 2MASS LGA mosaics are ~0.35 mag dimmer, when compared with images generated from IRSA image tiles service; nevertheless, when comparing late-type galaxies (LTGs) we did not find any difference. Therefore, for ETGs we present the results derived on IRSA image tiles, while for LTGs we used data from the LGA mosaics. Additionally, by combining these structural parameters with scaling relations and kinematic data, we separated classical bulges from pseudobulges. We found that ~40 % of the objects in our sample are classified as pseudobulges, which are found preferentially in LTGs. Also, our findings confirm trends reported earlier in the distributions for some physical parameters, such as S\'ersic index, B/T and q ratios. In general, our results are in agreement with previous one-dimensional studies. In a companion paper, we revise some of the scaling relations among global galaxy properties, as well as their interrelation with Supermassive Black Holes. Comment: 24 pages, 17 figures, 6 tables. Accepted for publication in MNRAS (2021 August 9) |
| Databáze: | OpenAIRE |
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