J/ApJ/691/228 Velocities of PNe in NGC 4697 (Mendez+, 2009)
Kinematics of planetary nebulae in the outskirts of the elliptical galaxy
NGC 4697.
Mendez R.H., Teodorescu A.M., Kudritzki R.-P., Burkert A.
<Astrophys. J., 691, 228-240 (2009)>
=2009ApJ...691..228M 2009ApJ...691..228M (SIMBAD/NED BibCode)
ADC_Keywords: Radial velocities ; Planetary nebulae ; Magnitudes
Keywords: galaxies: elliptical and lenticular, cD - galaxies: individual
(NGC 4697) - galaxies: kinematics and dynamics - planetary nebulae:
general - techniques: radial velocities
Abstract:
We describe the implementation of slitless radial velocity
measurements of extragalactic planetary nebulae (PNs) with the 8.2m
Subaru telescope and its Cassegrain imaging spectrograph, Faint Object
Camera and Spectrograph (FOCAS). As a first application, we have
extended a previous search for PNs in NGC 4697 to larger angular
distances from its center. A total of 218 PNs were detected, and their
radial velocities were measured. We have added 56 new PN detections to
the existing sample of 535, observed previously with the ESO VLT +
FORS imaging spectrograph; 36 of these new 56 PNs are located at
angular distances larger than 230 arcsec from the center of NGC 4697.
We compare the new FOCAS velocities with the earlier FORS velocities,
for 158 of the 162 reobserved sources, finding good agreement. We now
have kinematic information extending out to five effective radii from
the center.
Description:
The slitless radial velocity method was described in Paper I (Mendez
et al. 2001ApJ...563..135M 2001ApJ...563..135M). The 8.2m Subaru telescope (Mauna Kea,
Hawaii) and its Cassegrain imaging spectrograph FOCAS observations
were made on the nights of 2004 May 12/13, 13/14, and 2005 May 11/12,
12/13, and 13/14. The 2004 nights were partly clouded. The first two
2005 nights were photometric, and the last one was affected by thin
cirrus.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 57 218 PNe in NGC 4697 detected with FOCAS
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See also:
J/ApJS/175/522 : Catalog of PNe in NGC 4697 (Mendez+, 2008)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- IdF Identification number (<[MTK2008] FNNNN> in
Simbad)
6- 9 I4 arcsec xPix x coordinate (1)
11- 14 I4 arcsec yPix y coordinate (1)
16- 17 I2 h RAh Hour of right ascension (J2000)
19- 20 I2 min RAm Minute of right ascension (J2000)
22- 26 F5.2 s RAs Second of right ascension (J2000)
28 A1 --- DE- Declination sign (J2000)
29 I1 deg DEd Degree of declination (J2000)
31- 32 I2 arcmin DEm Arcminute of declination (J2000)
34- 37 F4.1 arcsec DEs Arcsecond of declination (J2000)
39- 43 F5.2 mag m5007 ?=-1 Jacoby magnitude (5007Å) (2)
45- 48 I4 km/s HRV Heliocentric radial velocity
50- 52 I3 --- IdE ?=-1 E FORS field identification number (3)
54- 57 I4 --- IdW ?=-1 W FORS field identification number (3)
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Note (1): relative to the optical center of NGC 4697.
Note (2): m5007 magnitude from Jacoby et al. (1989ApJ...339...39J 1989ApJ...339...39J) as:
m5007=-2.5logF5007-13.74 where F5007 is in units of ergs/cm2/s.
Note (3): if the PN is present in the FORS PN catalog (Mendez et al. 2008,
Cat. J/ApJS/175/522 ; <[MTK2008] ENNN> or <[MTK2008] WNNN> in Simbad).
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History:
From electronic version of the journal
References:
Mendez et al. Paper I. 2001ApJ...563..135M 2001ApJ...563..135M
(End) Emmanuelle Perret [CDS] 21-Feb-2011