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Among the newly observed objects, we discovered the galaxies UGC 2172
and NGC 3239 in the stage of a vigorous burst of star formation.
The images in the Balmer Hα line were obtained for 400 galaxies
of the Local Volume with the distances within 10 Mpc at the 6-m
BTA telescope (as well as the southern telescopes in Chile, India
and South Africa) by the Laboratory of Extragalactic Astrophysics and
Cosmology of the SAO RAS. This number exceeds the total number of
nearby galaxies studied in the Hα line in all the other observatories
around the world. The data obtained allowed to explore the structure
of star formation sources in the galaxies of different types with a
resolution of 10-30 parsecs and to determine the integral rates of
star formation in galaxies on a time scale of about 10 million years.
According to these data and the UV fluxes measured at the GALEX satellite,
we have compiled a unique summary of 800 galaxies of the Local Volume
where the differences in the star formation rates exceed
~10 orders of magnitude.
A detailed presentation of the results is contained in the papers:
Karachentsev et al. 2013, AJ, 145, 101; Karachentsev and Kaisina 2013,
AJ, 146, 46; Kaisin and Karachentsev 2013, Astrophysical Bulletin, 68, 381.
Published:
Karachentsev et al. 2013, AJ, 145, 101; Karachentsev and Kaisina 2013,
AJ, 146, 46; Kaisin and Karachentsev 2013, Astrophysical Bulletin, 68, 381.
Contact - Kaisin S.S.
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Fig.1.
An image of the interacting galaxy NGC 3239, which is a double (or a triple)
system of merging dwarf galaxies
Fig.2.
Figure 2 shows its image in the Hα line, obtained by the BTA SCORPIO
focal reducer, where you can see lots of powerful centers of star formation
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