دورية أكاديمية

Clustercentric Distance or Local Density? It Depends on Galaxy Morphology

التفاصيل البيبلوغرافية
العنوان: Clustercentric Distance or Local Density? It Depends on Galaxy Morphology
المؤلفون: Benedetta Vulcani, Bianca M. Poggianti, Marco Gullieuszik, Alessia Moretti, Jacopo Fritz, Daniela Bettoni, Beatrice Facciolli, Giovanni Fasano, Alessandro Omizzolo
المصدر: The Astrophysical Journal, Vol 949, Iss 2, p 73 (2023)
بيانات النشر: IOP Publishing, 2023.
سنة النشر: 2023
المجموعة: LCC:Astrophysics
مصطلحات موضوعية: Galaxies, Late-type galaxies, Elliptical galaxies, Lenticular galaxies, Spiral galaxies, Early-type galaxies, Astrophysics, QB460-466
الوصف: Determining which between projected local density and distance from the cluster center plays a major role in regulating morphological fractions in clusters is a longstanding debate. Reaching a definitive answer will shed light on the main physical mechanisms at play in the most extreme environments. Here we make use of the data from the OmegaWINGS survey, currently the largest survey of clusters in the local universe extending beyond 2 virial radii from the cluster cores, to extend the previous analysis outside the virial radius. Local density and clustercentric distance seems to play different roles for galaxies of different morphology: the fraction of elliptical galaxies mainly depends on local density, suggesting that their formation was linked to the primordial densities, which now correspond to the cluster cores. Only the fraction of low-mass ellipticals shows an anticorrelation with clustercentric distance, suggesting a different origin for these objects. Excluding elliptical galaxies, the relative fraction of S0s and spirals instead depends on local density only far from the cluster cores, while within the virial radius their proportion is regulated by distance, suggesting that cluster-specific processes halt the star formation and transform Sp galaxies into S0s. This interpretation is supported by literature results on the kinematical analysis of early- and late-type galaxies, according to which fast and slow rotators have distinct dependencies on halo mass and local density.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1538-4357
Relation: https://doaj.org/toc/1538-4357
DOI: 10.3847/1538-4357/acc5e2
URL الوصول: https://doaj.org/article/20f6b248fae541469e127c7ab6746bde
رقم الأكسشن: edsdoj.20f6b248fae541469e127c7ab6746bde
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:15384357
DOI:10.3847/1538-4357/acc5e2