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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]λ5007 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 Hα 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 Hα 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. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 76 7 Rejected PN candidates table3.dat 76 109 Detected PN candidates
See also: J/ApJ/667/L145 : HST Photometry of M82 region B (Smith+, 2007) J/AJ/121/768 : BVIJH photometry of M82 (de Grijs+, 2001) Byte-by-byte Description of file: table2.dat table3.dat
Bytes Format Units Label Explanations
1- 3 I3 --- [JMT2009] Identification number 5- 12 F8.3 arcsec X X coordinate (1) 14- 21 F8.3 arcsec Z Z coordinate (1) 23- 24 I2 h RAh Hour of right ascension (J2000) 26- 27 I2 min RAm Minute of right ascension (J2000) 29- 34 F6.3 s RAs Second of right ascension (J2000) 36 A1 --- DE- Sign of declination (J2000) 37- 38 I2 deg DEd Degree of declination (J2000) 40- 41 I2 arcmin DEm Arcminute of declination (J2000) 43- 47 F5.2 arcsec DEs Arcsecond of declination (J2000) 49- 55 F7.2 km/s HRV ? Heliocentric radial velocity 57- 62 F6.3 mag 5007mag ? [OIII]λ5007 magnitude 64- 76 A13 --- Note Rejection explanation (table 2) or "S" for membership in the statistical sample used for planetary nebula luminosity function (PNLF) fitting (table 3)
Note (1): The X and Z coordinates have their origin at RA=9h55m51.77s DE=69°40'50.22", where X and Z are defined along the major and minor axes, respectively.
History: From electronic version of the journal
(End) Emmanuelle Perret [CDS] 31-May-2011
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