The Hα Galaxy Survey
نویسندگان
چکیده
منابع مشابه
The Hα Galaxy Survey. Viii. Close Companions and Interactions, and the Definition of Starbursts
We consider the massive star formation properties, radial profiles, and atomic gas masses of those galaxies in our Hα Galaxy Survey that have close companion galaxies, in comparison with a matched control sample of galaxies without companions. Our analysis is based on Hα and continuum images of 327 disk galaxies that form a representative sample of the local Universe. We find that the presence ...
متن کاملThe Hα and Infrared Star Formation Rates for the Nearby Field Galaxy Survey
We investigate the Hα and infrared star formation rate (SFR) diagnostics for galaxies in the Nearby Field Galaxy Survey (NFGS). For the 81 galaxies in our sample, we derive Hα fluxes (included here) from integrated spectra. There is a strong correlation between the ratio of far-infrared to optical luminosities L(FIR)/L(Hα) and the extinction E(B − V ) measured with the Balmer decrement. Before ...
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The 6dF Galaxy Survey (6dFGS) 1 is a spectroscopic survey of the entire southern sky with |b| > 10◦, based on the 2MASS near infrared galaxy catalog. It is conducted with the 6dF multi-fiber spectrograph attached to the 1.2-m UK Schmidt Telescope. The survey will produce redshifts for some 170,000 galaxies, and peculiar velocities for about 15,000 and is expected to be complete by June 2005.
متن کاملFive WC9 stars discovered in the AAO/UKST Hα survey
We report the discovery of 5 massive Wolf-Rayet (WR) stars resulting from a programme of follow-up spectroscopy of candidate emission line stars in the AAO/UKST Southern Galactic Plane Hα survey. The 6195-6775 Å spectra of the stars are presented and discussed. A WC9 class is assigned to all 5 stars through comparison of their spectra with those of known latetype WC stars, bringing the known to...
متن کاملA Robotic Wide-Angle Hα Survey of the Southern Sky
We have completed a robotic wide-angle imaging survey of the southern sky (δ = +15 to −90) at 656.3 nm wavelength, the Hα emission line of hydrogen. Each image of the resulting Southern H-Alpha Sky Survey Atlas (SHASSA) covers an area of the sky 13 square at an angular resolution of approximately 0.8 arcminute, and reaches a sensitivity level of 2 rayleigh (1.2 × 10 erg cm s arcsec) per pixel, ...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2005
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20035892