/ftp/cats/J_ApJ/697/./1138



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J/ApJ/697/1138            Discovery of PNe in M82               (Johnson+, 2009)
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Beginning of ReadMe : J/ApJ/697/1138 Discovery of PNe in M82 (Johnson+, 2009) ================================================================================ Discovery, photometry, and kinematics of planetary nebulae in M 82. Johnson L.C., Mendez R.H., Teodorescu A.M. <Astrophys. J., 697, 1138-1152 (2009)> =2009ApJ...697.1138J ================================================================================ ADC_Keywords: Planetary nebulae ; Radial velocities ; Magnitudes ; Galaxies, optical Keywords: galaxies: individual (M 82) - galaxies: kinematics and dynamics - planetary nebulae: general - techniques: radial velocities Abstract: Using an [OIII]lambda5007 on-band/off-band filter technique, we identify 109 planetary nebulae (PNe) candidates in the edge-on spiral galaxy M 82, using the FOCAS instrument at the 8.2m Subaru Telescope. The use of ancillary high-resolution Hubble Space Telescope Advanced Camera for Surveys Halpha imaging aided in confirming these candidates, helping to discriminate PNe from contaminants such as supernova remnants and compact HII regions. Once identified, these PNe reveal a great deal about the host galaxy; our analysis covers kinematics, stellar distribution, and distance determination. Radial velocities were determined for 94 of these PNe using a method of slitless spectroscopy, from which we obtain a clear picture of the galaxy's rotation. Description: Observations of M 82 were made using the Faint Object Camera and Spectrograph (FOCAS) at the Cassegrain focus of the 8.2m Subaru Telescope located atop Mauna Kea, Hawaii on three nights, 2004 November 6-9. To complete our set of observations, we used a Hubble Space Telescope six-point mosaic Halpha image of the galaxy, observed using the Advanced Camera for Surveys (ACS) wide-field imager. These observations were made available via the Multimission Archive at STScI.