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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 (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). 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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 57 218 PNe in NGC 4697 detected with FOCAS
See also: J/ApJS/175/522 : Catalog of PNe in NGC 4697 (Mendez+, 2008) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
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)
Note (1): relative to the optical center of NGC 4697. Note (2): m5007 magnitude from Jacoby et al. (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).
History: From electronic version of the journal References: Mendez et al. Paper I. 2001ApJ...563..135M
(End) Emmanuelle Perret [CDS] 21-Feb-2011
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