H-alpha survey of nearby dwarf galaxies

Abstract

We present the H-alpha imaging data and flux measurements for 30 dwarf galaxies in the Local volume. The H-alpha fluxes are used to derive the galaxy star formation rate, SFR. The sample of observed galaxies is characterized by the following parameters: the median distance of 7.5 Mpc, the median blue absolute magnitude of -14.8 mag, and median SFR of -2.0 dex. Two dSph members of the Local Group: Cetus and Leo IV do not show signs of star formation on the rate of -5.4 dex and -7.0 dex, respectively. The BCD galaxy ESO 553-46 has one of the highest specific SFR among the Local volume galaxies.

22 pages, 4 figures, 1 table; MNRAS, 2012, accepted

References in corpus (8)

• Cats and Dogs, Hair and A Hero: A Quintet of New Milky Way Companions
• An H-alpha Imaging Survey of Galaxies in the Local 11 Mpc Volume
• FIGGS: Faint Irregular Galaxies GMRT Survey - Overview, observations and first results
• Breathing in Low Mass Galaxies: A Study of Episodic Star Formation
• A view of the M81 galaxy group via the H-alpha window
• More galaxies in the Local Volume imaged in H-alpha
• Neutral Hydrogen Clouds near Early-Type Dwarf Galaxies of the Local Group
• Canes Venatici I cloud of galaxies seen in the H-alpha line

Cited by in corpus (6)

• Taking Care of Business in a Flash: Constraining the Timescale for Low-Mass Satellite Quenching with ELVIS
• What Causes The Formation of Disks and End of Bursty Star Formation?
• Extragalactic dispersion measures of fast radio bursts
• A non-repeating fast radio burst in a dwarf host galaxy
• Local Volume Late-Type Galaxies with an Extreme Ratio of $H\alpha$-to-$FUV$ Star-Formation Rates
• New radial velocities for dwarf galaxies in the Local Volume