Measuring the X-shaped structures in edge-on galaxies

S. S. Savchenko, N. Ya Sotnikova, A. V. Mosenkov, V. P. Reshetnikov, D. V. Bizyaev

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)

Abstract

We present a detailed photometric study of a sample of 22 edge-on galaxies with clearly visible X-shaped structures. We propose a novel method to derive geometrical parameters of these features, along with the parameters of their host galaxies based on the multi-component photometric decomposition of galactic images. To include the X-shaped structure into our photometric model, we use the IMFIT package, in which we implement a new component describing the X-shaped structure. This method is applied for a sample of galaxies with available Sloan Digital Sky Survey and Spitzer IRAC 3.6 μm observations. In order to explain our results, we perform realistic N-body simulations of aMilkyWay-type galaxy and compare the observed and the model X-shaped structures. Our main conclusions are as follows: (1) galaxies with strong X-shaped structures reside in approximately the same local environments as field galaxies; (2) the characteristic size of the X-shaped structures is about 2/3 of the bar size; (3) there is a correlation between the X-shaped structure size and its observed flatness: the larger structures are more flattened; (4) our N-body simulations qualitatively confirm the observational results and support the bar-driven scenario for the X-shaped structure formation.

Original languageEnglish
Pages (from-to)3261-3272
Number of pages12
JournalMonthly Notices of the Royal Astronomical Society
Volume471
Issue number3
DOIs
StatePublished - 1 Jan 2017

Keywords

  • Galaxies: spiral
  • Methods: data analysis
  • Techniques: photometric

Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

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abstract = "We present a detailed photometric study of a sample of 22 edge-on galaxies with clearly visible X-shaped structures. We propose a novel method to derive geometrical parameters of these features, along with the parameters of their host galaxies based on the multi-component photometric decomposition of galactic images. To include the X-shaped structure into our photometric model, we use the IMFIT package, in which we implement a new component describing the X-shaped structure. This method is applied for a sample of galaxies with available Sloan Digital Sky Survey and Spitzer IRAC 3.6 μm observations. In order to explain our results, we perform realistic N-body simulations of aMilkyWay-type galaxy and compare the observed and the model X-shaped structures. Our main conclusions are as follows: (1) galaxies with strong X-shaped structures reside in approximately the same local environments as field galaxies; (2) the characteristic size of the X-shaped structures is about 2/3 of the bar size; (3) there is a correlation between the X-shaped structure size and its observed flatness: the larger structures are more flattened; (4) our N-body simulations qualitatively confirm the observational results and support the bar-driven scenario for the X-shaped structure formation.",
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Measuring the X-shaped structures in edge-on galaxies. / Savchenko, S. S.; Sotnikova, N. Ya; Mosenkov, A. V.; Reshetnikov, V. P.; Bizyaev, D. V.

In: Monthly Notices of the Royal Astronomical Society, Vol. 471, No. 3, 01.01.2017, p. 3261-3272.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Measuring the X-shaped structures in edge-on galaxies

AU - Savchenko, S. S.

AU - Sotnikova, N. Ya

AU - Mosenkov, A. V.

AU - Reshetnikov, V. P.

AU - Bizyaev, D. V.

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