Nonparametric galaxy morphology from UV to submm wavelengths

被引：0

作者：

Baes, Maarten ^{[1
]}

Nersesian, Angelos ^{[2
]}

Casasola, Viviana ^{[3
]}

Bianchi, Simone ^{[4
]}

Cassarà, Letizia P. ^{[2
,5
]}

Clark, Christopher J. R. ^{[6
]}

De Looze, Ilse ^{[1
,7
]}

Dobbels, Wouter ^{[1
]}

Fritz, Jacopo ^{[8
]}

Galametz, Maud ^{[9
]}

Galliano, Frédéric ^{[9
]}

Madden, Suzanne C. ^{[9
]}

Mosenkov, Aleksandr V. ^{[10
,11
]}

Viaene, Sébastien ^{[1
,12
]}

Trčka, Ana ^{[1
]}

Xilouris, Emmanuel M. ^{[2
]}

机构：

[1] Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, Gent,9000, Belgium

[2] National Observatory of Athens, Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, Ioannou Metaxa and Vasileos Pavlou, Athens,15236, Greece

[3] INAF - Istituto di Radioastronomia, Via P. Gobetti 101, Bologna,40129, Italy

[4] INAF - Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, Firenze,50125, Italy

[5] INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica, Via A. Corti 12, Milano,20133, Italy

[6] Space Telescope Science Institute, 3700 San Martin Drive, Baltimore,MD,21218, United States

[7] Department of Physics and Astronomy, University College London, Gower Street, London,WC1E 6BT, United Kingdom

[8] Instituto de Radioastronomiá y Astrofísica, UNAM, Antigua Carretera A Pátzcuaro # 8701, Ex-Hda. San José de la Huerta, Morelia, Michoacán,58089, Mexico

[9] AIM, CEA, CNRS, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité, Gif-sur-Yvette,91191, France

[10] Central Astronomical Observatory of RAS, Pulkovskoye Chaussee 65/1, St. Petersburg,196140, Russia

[11] St. Petersburg State University, Universitetskij Pr. 28, St. Petersburg, Stary Peterhof,198504, Russia

[12] Centre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield,AL10 9AB, United Kingdom

来源：

Astronomy and Astrophysics | 2020年 / 641卷

关键词：

Stars; -; Morphology; Dust;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We present the first nonparametric morphological analysis of a set of spiral galaxies from UV to submillimeter (submm) wavelengths. Our study is based on high-quality multi-wavelength imaging for nine well-resolved spiral galaxies from the DustPedia database, combined with nonparametric morphology indicators calculated in a consistent way using the StatMorph package. We measure the half-light radius, the concentration index, the asymmetry index, the smoothness index, the Gini coefficient, and the M20 indicator in various wavebands from UV to submm wavelengths, and in stellar mass, dust mass, and star formation rate maps. We find that the interstellar dust in galaxies is distributed in a more extended, less centrally concentrated, more asymmetric, and more clumpy way than the stars are. This is particularly evident when comparing morphological indicators based on the stellar mass and dust mass maps. This should serve as a warning sign against treating the dust in galaxies as a simple smooth component. We argue that the nonparametric galaxy morphology of galaxies from UV to submm wavelengths is an interesting test for cosmological hydrodynamics simulations. © 2020 ESO.

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