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 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 76 7 Rejected PN candidates
table3.dat 64 109 Detected PN candidates
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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
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Bytes Format Units Label Explanations
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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)
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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.
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 31-May-2011