Does the stellar disc flattening depend on the galaxy type?

A.V. Mosenkov, N.Y. Sotnikova, V.P. Reshetnikov, D.V. Bizyaev, S.J. Kautsch

Research output: Contribution to journalArticleResearchpeer-review

13 Citations (Scopus)

Abstract

We analyse the dependence of the stellar disc flatness on the galaxy morphological type using 2D decomposition of galaxies from the reliable subsample of the Edge-on Galaxies in SDSS catalogue. Combining these data with the retrieved models of the edge-on galaxies from the Two Micron All Sky Survey and the Spitzer Survey of Stellar Structure in Galaxies catalogue, we make the following conclusions. 1. The disc relative thickness z0/h in the near- and mid-infrared passbands correlates weakly with morphological type and does not correlate with the bulge-to-total luminosity ratio B/T in all studied bands. 2. Applying a 1D photometric profile analysis overestimates the disc thickness in galaxies with large bulges making an illusion of the relationship between the disc flattening and the ratio B/T. 3. In our sample, the early-type disc galaxies (S0/a) have both flat and `puffed' discs. The early spirals and intermediate-type galaxies have a large scatter of the disc flatness, which can be caused by the presence of a bar: barred galaxies have thicker stellar discs, on average. On the other hand, the late-type spirals are mostly thin galaxies, whereas irregular galaxies have puffed stellar discs.
Original languageEnglish
Pages (from-to)2376-2389
Number of pages14
JournalMonthly Notices of the Royal Astronomical Society
Volume451
Issue number3
DOIs
StatePublished - 2015

Keywords

  • galaxies: statistics, galaxies: structure

Scopus subject areas

  • Physics and Astronomy(all)

Cite this

@article{c9669f7665ba49888fa38effbde782b7,
title = "Does the stellar disc flattening depend on the galaxy type?",
abstract = "We analyse the dependence of the stellar disc flatness on the galaxy morphological type using 2D decomposition of galaxies from the reliable subsample of the Edge-on Galaxies in SDSS catalogue. Combining these data with the retrieved models of the edge-on galaxies from the Two Micron All Sky Survey and the Spitzer Survey of Stellar Structure in Galaxies catalogue, we make the following conclusions. 1. The disc relative thickness z0/h in the near- and mid-infrared passbands correlates weakly with morphological type and does not correlate with the bulge-to-total luminosity ratio B/T in all studied bands. 2. Applying a 1D photometric profile analysis overestimates the disc thickness in galaxies with large bulges making an illusion of the relationship between the disc flattening and the ratio B/T. 3. In our sample, the early-type disc galaxies (S0/a) have both flat and `puffed' discs. The early spirals and intermediate-type galaxies have a large scatter of the disc flatness, which can be caused by the presence of a bar: barred galaxies have thicker stellar discs, on average. On the other hand, the late-type spirals are mostly thin galaxies, whereas irregular galaxies have puffed stellar discs.",
keywords = "galaxies: statistics, galaxies: structure",
author = "A.V. Mosenkov and N.Y. Sotnikova and V.P. Reshetnikov and D.V. Bizyaev and S.J. Kautsch",
year = "2015",
doi = "10.1093/mnras/stv1085",
language = "English",
volume = "451",
pages = "2376--2389",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Wiley-Blackwell",
number = "3",

}

Does the stellar disc flattening depend on the galaxy type? / Mosenkov, A.V.; Sotnikova, N.Y.; Reshetnikov, V.P.; Bizyaev, D.V.; Kautsch, S.J.

In: Monthly Notices of the Royal Astronomical Society, Vol. 451, No. 3, 2015, p. 2376-2389.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Does the stellar disc flattening depend on the galaxy type?

AU - Mosenkov, A.V.

AU - Sotnikova, N.Y.

AU - Reshetnikov, V.P.

AU - Bizyaev, D.V.

AU - Kautsch, S.J.

PY - 2015

Y1 - 2015

N2 - We analyse the dependence of the stellar disc flatness on the galaxy morphological type using 2D decomposition of galaxies from the reliable subsample of the Edge-on Galaxies in SDSS catalogue. Combining these data with the retrieved models of the edge-on galaxies from the Two Micron All Sky Survey and the Spitzer Survey of Stellar Structure in Galaxies catalogue, we make the following conclusions. 1. The disc relative thickness z0/h in the near- and mid-infrared passbands correlates weakly with morphological type and does not correlate with the bulge-to-total luminosity ratio B/T in all studied bands. 2. Applying a 1D photometric profile analysis overestimates the disc thickness in galaxies with large bulges making an illusion of the relationship between the disc flattening and the ratio B/T. 3. In our sample, the early-type disc galaxies (S0/a) have both flat and `puffed' discs. The early spirals and intermediate-type galaxies have a large scatter of the disc flatness, which can be caused by the presence of a bar: barred galaxies have thicker stellar discs, on average. On the other hand, the late-type spirals are mostly thin galaxies, whereas irregular galaxies have puffed stellar discs.

AB - We analyse the dependence of the stellar disc flatness on the galaxy morphological type using 2D decomposition of galaxies from the reliable subsample of the Edge-on Galaxies in SDSS catalogue. Combining these data with the retrieved models of the edge-on galaxies from the Two Micron All Sky Survey and the Spitzer Survey of Stellar Structure in Galaxies catalogue, we make the following conclusions. 1. The disc relative thickness z0/h in the near- and mid-infrared passbands correlates weakly with morphological type and does not correlate with the bulge-to-total luminosity ratio B/T in all studied bands. 2. Applying a 1D photometric profile analysis overestimates the disc thickness in galaxies with large bulges making an illusion of the relationship between the disc flattening and the ratio B/T. 3. In our sample, the early-type disc galaxies (S0/a) have both flat and `puffed' discs. The early spirals and intermediate-type galaxies have a large scatter of the disc flatness, which can be caused by the presence of a bar: barred galaxies have thicker stellar discs, on average. On the other hand, the late-type spirals are mostly thin galaxies, whereas irregular galaxies have puffed stellar discs.

KW - galaxies: statistics, galaxies: structure

U2 - 10.1093/mnras/stv1085

DO - 10.1093/mnras/stv1085

M3 - Article

VL - 451

SP - 2376

EP - 2389

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 3

ER -