Large-Scale Outer Rings of Early-type Disk Galaxies

Irina P. Kostiuk (Special Astrophysical Observatory of the Russian Academy of Sciences; Moscow; Nizhnij Arkhyz; Olga K. Sil'chenko (Sternberg Astronomical Institute of the Lomonosov Moscow State University; Russia)

arxiv: 1509.04353 · v1 · pith:E4RR5RBNnew · submitted 2015-09-14 · 🌌 astro-ph.GA

Large-Scale Outer Rings of Early-type Disk Galaxies

Irina P. Kostiuk (Special Astrophysical Observatory of the Russian Academy of Sciences , Nizhnij Arkhyz , Russia) , Olga K. Sil'chenko (Sternberg Astronomical Institute of the Lomonosov Moscow State University , Moscow This is my paper

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keywords ringsgalaxiescurrentdiskearly-typeformationouterstar

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We have searched for presence of current star formation in outer stellar rings of early-type disk (S0-Sb) galaxies by inspecting a representative sample of nearby galaxies with rings from the recent Spitzer catalog ARRAKIS (Comeron et al. 2014). We have found that regular rings (of R-type) reveal young stellar population with the age of less than 200~Myr in about half of all the cases, while in the pseudorings (open rings, R'), which inhabit only spiral galaxies, current star formation proceeds almost always.

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Large-Scale Outer Rings of Early-type Disk Galaxies

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