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Atlas of Hα images for five hundred nearest dwarf galaxies

Published online by Cambridge University Press:  30 October 2019

Serafim S. Kaisin  and
Igor D. Karachentsev
Serafim S. Kaisin
Affiliation:
Special Astrophysical Observatory of the Russian Academy of Sciences, Nizhnij Arkhyz, Zelenchukskiy region, Karachai-Cherkessian Republic, Russia emails: skai@sao.ru, ikar@sao.ru
Igor D. Karachentsev
Affiliation:
Special Astrophysical Observatory of the Russian Academy of Sciences, Nizhnij Arkhyz, Zelenchukskiy region, Karachai-Cherkessian Republic, Russia emails: skai@sao.ru, ikar@sao.ru
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Abstract

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Results of mass imaging nearby dwarf galaxies in emission Hα line and red continuum with the 6-meter BTA telescope are available via the address: http://www.sao.ru/lv/lvgdb. The sample of dwarfs limited by a distance of 11 Mpc contains about 500 objects. Their Hα - fluxes are used to derive integrated and specific star formation rates of the galaxies. We evaluate the consistency between star formation rates obtained from our Hα-survey and GALEX far-ultraviolet survey. We fix a systematic rise of the ratio SFR(FUV)/SFR(Hα) with the decreasing stellar mass of dwarf galaxies. In the sample there were included only galaxies of late types: T = 10 (Ir), 9 (Im, BCD), 8 (Sdm), 7 (Sd), 6 (Scd), since elliptical and lenticular galaxies, and also spiral with massive bulges, have a significantly different history of star formation.

Keywords

Galaxies: dwarfevolutionastronomical data bases: surveyscatalogsstars: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S344: Dwarf Galaxies: From the Deep Universe to the Present , August 2018 , pp. 283 - 287
Copyright
© International Astronomical Union 2019 

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