J/MNRAS/369/97 M31 planetary nebulae velocities (Halliday+, 2006)
Planetary nebula velocities in the disc and bulge of M31.
Halliday C., Carter D., Bridges T.J., Jackson Z.C., Wilkinson M.I.,
Quinn D.P., Evans N.W., Douglas N.G., Merrett H.R., Merrifield M.R.,
Romanowsky A.J., Kuijken K., Irwin M.J.
<Mon. Not. R. Astron. Soc., 369, 97-119 (2006)>
=2006MNRAS.369...97H 2006MNRAS.369...97H
ADC_Keywords: Galaxies, nearby ; Planetary nebulae ; Radial velocities
Keywords: galaxies: haloes - galaxies: individual: M31 - galaxies: spiral
Abstract:
We present radial velocities for a sample of 721 planetary nebulae in
the disc and bulge of M31, measured using the WYFFOS fibre
spectrograph on the William Herschel Telescope. Velocities are
determined using the [OIII] λ5007 emission line. Rotation and
velocity dispersion are measured to a radius of 50arcmin (11.5kpc),
the first stellar rotation curve and velocity dispersion profile for
M31 to such a radius. Our kinematics are consistent with rotational
support at radii well beyond the bulge effective radius of 1.4kpc,
although our data beyond a radius of 5kpc are limited. We present
tentative evidence for kinematic substructure in the bulge of M31 to
be studied fully in a later work. This paper is part of an ongoing
project to constrain the total mass, mass distribution and velocity
anisotropy of the disc, bulge and halo of M31.
Description:
Our spectroscopic data were acquired during two observing runs at the
William Herschel Telescope, in 1999 August/September and 2001 October.
Between our spectroscopic runs we completed an [OIII] plus Stroemgren
y imaging survey using the Isaac Newton Telescope (INT) to detect
additional PNe targets out to a projected radius of 12kpc. Here and
throughout this paper we assume a distance of 770kpc for M31.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 36 40 Positions of a representative selection of
fiducial or tertiary astrometric standard stars
tablea1.dat 75 721 Positions and velocities of PNe
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See also:
J/ApJ/339/53 : Planetary nebulae as standard candles. II. (Ciardullo+, 1989)
J/ApJ/616/804 : Planetary nebulae kinematics in M31 (Hurley-Keller+, 2004)
J/MNRAS/369/120 : Kinematic survey of planetary nebulae in M31 (Merrett+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Astrometric standard stars designation
12- 13 I2 h RAh Right ascension (J2000)
15- 16 I2 min RAm Right ascension (J2000)
18- 23 F6.3 s RAs Right ascension (J2000)
25 A1 --- DE- Declination sign (J2000)
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 36 F5.2 arcsec DEs Declination (J2000)
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name PN designation (1)
12- 13 I2 h RAh Right ascension (J2000)
15- 16 I2 min RAm Right ascension (J2000)
18- 22 F5.2 s RAs Right ascension (J2000)
24 A1 --- DE- Declination sign (J2000)
25- 26 I2 deg DEd Declination (J2000)
28- 29 I2 arcmin DEm Declination (J2000)
31- 34 F4.1 arcsec DEs Declination (J2000)
36- 41 F6.1 km/s cz Final heliocentric velocity
43- 46 F4.1 km/s e_cz rms uncertainty on cz
48- 53 F6.2 arcmin Dmaj [-60/72] Distance from the nucleus along
major axis (2)
55- 60 F6.2 arcmin Dmin [-48/55] Distance from the nucleus along
minor axis (2)
62- 66 F5.2 arcmin Rad Distance from the nucleus
68- 73 F6.2 deg Az Azimuth angle (measured through west
from north)
75 I1 --- Nobs Number of observations
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Note (1): Identifier: if it is listed by Ciardullo et al. (1989, Cat.
J/ApJ/339/53), their identifier is used (of the form PNNN,
Ford M 31 NNN in Simbad), otherwise it has an identifier from
our imaging survey (PNfieldobject).
Note (2): We have adopted the position of the nucleus listed in the
NASA/IPAC Extragalactic Database (NED), close to that given by
Crane, Dickel & Cowan (1992ApJ...390L...9C 1992ApJ...390L...9C).
We assume a major axis position angle of 38.1°.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 19-Oct-2006