SIMBAD references

2011MNRAS.415L..31K - Mon. Not. R. Astron. Soc., 415, L31-L34 (2011/July-3)

Emission sparks around M 81 and in some dwarf spheroidal galaxies.


Abstract (from CDS):

We use Hα images of three clumps of young stars situated between M 81 and NGC 3077 to estimate their star formation rate. Radial velocities of the clumps measured by us, as well as the velocity of the H II region in the dwarf spheroidal (dSph) galaxy KDG 61, are compatible with their location at the outskirts of a large rotating gaseous disc around M 81. In contrast to KDG 61, the radial velocity of the emission knot in the dSph galaxy DDO 44, +213±25 km/s, tells us that this Hα spark belongs to the dSph galaxy itself. F475W and F814W images of DDO 44 extracted from the Hubble Space Telescope archive reveal eight bluish (B - I < 0.8) stars apparently associated with the Hα knot.

Based on observations made with the 6-m BTA telescope of the Special Astrophysical Observatory, Russian Academy of Sciences.

Based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the data archive at the Space Telescope Science Institute (STScI). The STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.

Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): galaxies: dwarf - galaxies: evolution - galaxies: formation - galaxies: individual: DDO 44 - galaxies: stellar content

CDS comments: Clumps I, II, III are [MI2009] Clump I, II, III in SIMBAD.

Simbad objects: 31

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