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Artículo

The orientation of galaxy pairs with filamentary structures: Dependence on morphology

Mesa, Valeria AlejandraIcon ; Duplancic Videla, Maria FernandaIcon ; Alonso Giraldes, Maria SolIcon ; Muñoz Jofré, Maria RosaIcon ; Coldwell Lloveras, Georgina VanesaIcon ; Garcia Lambas, Diego RodolfoIcon
Fecha de publicación: 11/2018
Editorial: EDP Sciences
Revista: Astronomy and Astrophysics
ISSN: 0004-6361
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Astronomía

Resumen

Aims. With the aim of performing an analysis of the orientations of galaxy pair systems with respect to the underlying large-scale structure, we study the alignment between the axis connecting the pair galaxies and the host cosmic filament where the pair resides. In addition, we analyze the dependence of the amplitude of the alignment on the morphology of pair members as well as filament properties. Methods. We build a galaxy pair catalog requiring rp < 100 h-1 kpc and ΔV < 500 km s-1 within redshift z < 0.1 from the Sloan Digital Sky Survey (SDSS). We divided the galaxy pair catalog taking into account the morphological classification by defining three pair categories composed by elliptical-elliptical (E-E), elliptical-spiral (E-S) and spiral-spiral (S-S) galaxies. We use a previously defined catalog of filaments obtained from SDSS and we select pairs located closer than 1 h-1 Mpc to the filament spine, which are considered as members of filaments. For these pairs, we calculate the relative angle between the axis connecting each galaxy, and the direction defined by the spine of the parent filament. Results. We find a statistically significant alignment signal between the pair axes and the spine of the host filaments consistent with a relative excess of ∼15% aligned pairs. We obtain that pairs composed by elliptical galaxies exhibit a stronger alignment, showing a higher alignment signal for pairs closer than 200 h-1 kpc to the filament spine. In addition, we find that the aligned pairs are associated with luminous host filaments populated with a high fraction of elliptical galaxies. The findings of this work show that large-scale structures play a fundamental role in driving galactic anisotropic accretion as induced by galaxy pairs exhibiting a preferred alignment along the filament direction.
Palabras clave: GALAXIES: INTERACTIONS , GALAXIES: STATISTICS , LARGE-SCALE STRUCTURE OF UNIVERSE
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/86737
URL: https://www.aanda.org/10.1051/0004-6361/201832910
DOI: http://dx.doi.org/10.1051/0004-6361/201832910
Colecciones
Articulos(CCT - SAN JUAN)
Articulos de CENTRO CIENTIFICO TECNOLOGICO CONICET - SAN JUAN
Articulos(IANIGLA)
Articulos de INST. ARG. DE NIVOLOGIA, GLACIOLOGIA Y CS. AMBIENT
Articulos(IATE)
Articulos de INST.DE ASTRONOMIA TEORICA Y EXPERIMENTAL
Citación
Mesa, Valeria Alejandra; Duplancic Videla, Maria Fernanda; Alonso Giraldes, Maria Sol; Muñoz Jofré, Maria Rosa; Coldwell Lloveras, Georgina Vanesa; et al.; The orientation of galaxy pairs with filamentary structures: Dependence on morphology; EDP Sciences; Astronomy and Astrophysics; 619; 11-2018; 1-8; A24
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