H-alpha + [NII] Observations of the HII Regions in M81

  title={H-alpha + [NII] Observations of the HII Regions in M81},
  author={W. P. Lin and X. Zhou and David Burstein and R. A. Windhorst and J. S. Chen and et al.},
  journal={The Astronomical Journal},
In a first of a series of studies of the Hα + [N II] emission from nearby spiral galaxies, we present measurements of Hα + [N II] emission from H II regions in M81. Our method uses large-field CCD images and long-slit spectra and is part of the ongoing Beijing-Arizona-Taipei-Connecticut Sky Survey (the BATC survey). The CCD images are taken with the National Astronomical Observatories of China (NAOC) 0.6/0.9 m f/3 Schmidt telescope at the Xinglong Observing Station, using a multicolor filter… 
A Nascent Tidal Dwarf Galaxy Forming within the Northern H i Streamer of M82
We identify a ∼600 pc wide region of active star formation located within a tidal streamer of M82 via Hα emission (F Hα ∼ 6.5 × 10−14 erg s−1 cm−2), using a pathfinder instrument based on the
Galaxy disc central surface brightness distribution in the optical and near-infrared bands
  • L. Zhou, W. Du, +6 authors Y. Wang
  • Physics
    Monthly Notices of the Royal Astronomical Society
  • 2019
To study the disc central surface brightness ($\mu_0$) distribution in optical and near-infrared bands, we select 708 disc-dominated galaxies within a fixed distance of 57 Mpc from SDSS DR7 and


Composition gradient across M81
Spectrophotometric observations are presented for 18 H II regions in the galaxy M81 (type SAab). M81 is the earliest type galaxy for which extensive H II region observations have been made. The
Diffuse Ionized Gas in M51/NGC 5195 and M81
We present deep Hα and [S II] emission-line images of three galaxies, the Sab spiral M81, the Sc spiral M51, and its companion, NGC 5195, in our ongoing study of the diffuse ionized gas (DIG) in
Spatially Resolved Spectrophotometry of M81: Age, Metallicity, and Reddening Maps
In this paper we present a multicolor photometric study of the nearby spiral galaxy M81, using images obtained with the Beijing Astronomical Observatory 60/90 cm Schmidt telescope in 13
Ultraviolet imaging telescope and optical emission-line observations of H II regions in M81
Images of the type Sab spiral galaxy M81 were obtained in far-UV and near-UV bands by the Ultraviolet Imaging Telescope (UIT) during the Astro-1 Spacelab mission of 1990 December. Magnitudes in the
ROSAT X-Ray Observations of the Spiral Galaxy M81
We present results from the analysis of deep ROSAT HRI and PSPC observations of the spiral galaxy M81. The inferred total (0.5-2 keV band) luminosity of M81 is ~3 × 1040 ergs s-1, excluding the
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High angular resolution optical and near-infrared images are used to investigate the central regions of the nearby Sb galaxy M81 (NGC3031). The spectral-energy distribution of the circumnuclear
Surface Photometry of the Edge-on Galaxy NGC 4565
We present a deep, 42.79 hr image of the nearby, edge-on galaxy NGC 4565 in the Beijing-Arizona-Taipei-Connecticut 6660 Angstrom band using the large-format CCD system on the 0.6 m Schmidt telescope
Properties of H II region populations in galaxies. II. The H II region luminosity function
H-alpha emission-line fluxes have been measured for all of the detected H II regions in 30 nearby spiral and irregular galaxies, and these data are used to study the behavior of the H II region
Ultraviolet Imaging Telescope ultraviolet images : large-scale structure, H II regions, and extinction in M81
The study employs UV images of M81 obtained by the Ultraviolet Imaging Telescope (UIT) during the December 1990 Astro-1 spacelab mission to determine 2490- and 1520-A fluxes from 46 H II regions and
High-Resolution Mid-Infrared Images of the Nucleus of M81
We observed two nearby galaxies with potential or weak indications of nuclear activity, M32 and M81, with the MIRLIN mid-IR camera at N band (10.79 μm). M32 is not detected, but we give detailed