J/A+A/574/A109 Spectroscopy of Planetary Nebulae in NGC 5128 (Walsh+, 2015)
An imaging and spectroscopic study of the planetary nebulae in NGC 5128
(Centaurus A). Planetary nebula catalogues.
Walsh J.R., Rejkuba M., Walton N.A.
<Astron. Astrophys. 574, A109 (2015)>
=2015A&A...574A.109W 2015A&A...574A.109W
ADC_Keywords: Galaxies, nearby ; Planetary nebulae ; Photometry, CCD ;
Radial velocities
Keywords: galaxies: kinematics and dynamics - planetary nebulae: general -
galaxies: elliptical and lenticular, cD
Abstract:
Planetary nebulae (PNe) are excellent tracers of the common low mass
stars through their strong and narrow emission lines. The velocities
of large numbers of PNe are excellent tracers of galaxy kinematics.
NGC 5128, the nearest large early-type galaxy offers the possibility
to gather a large PN sample.
Imaging and spectroscopic observations of PNe in NGC 5128 were
obtained to find PNe and measure their velocities. Combined with
literature data, a large sample of high quality kinematic probes is
assembled for dynamical studies in NGC 5128.
NTT Imaging was obtained in 15 fields in NGC 5128 over 1 degree with
EMMI and [OIII] and off-band filters. Newly detected emission
sources, combined with literature PN, were used as input for FLAMES
multi-fibre spectroscopy in MEDUSA mode. Spectra of the 4600-5100Å
region were analysed and velocities were measured based on
[OIII]4959,5007Å and often Hβ.
The chief results are catalogues of 1118 PN candidates and 1267
spectroscopically confirmed PNe in NGC 5128. The catalogue of PN
candidates contains 1060 potential PNe discovered with NTT EMMI
imaging and 58 from literature surveys. The spectroscopically
confirmed PN catalogue has FLAMES radial velocity and emission line
measurements for 1135 PNe, of which 486 are newly confirmed here. An
additional 132 PN radial velocities are available from the literature.
For 629 PNe observed with FLAMES, H-beta was measured in addition to
the [OIII] emission lines. Nine targets show double-lined or more
complex profiles (19 components in total), and their possible origin
is discussed. FLAMES spectra of 48 globular clusters were also
targetted, and 11 had emission lines detected (two with multiple
components), but only 3 are PNe likely to belong to the host globular.
Conclusions. The total of 1267 confirmed PNe in NGC 5128 with radial
velocity measurements, of which 1135 have small velocity errors, is
the largest such collection of individual kinematic probes in an
early-type galaxy. This PN dataset, as well as the catalogue of 1118
PN candidates, are valuable resources for detailed investigation of
the kinematics and stellar population of NGC 5128.
Description:
Planetary nebula candidates were determined from EMMI imaging on and
off band [OIII]5007Å imaging and the catalogue is presented in
table7. For PN candidates in common with the previous literature
studies within 1 arcsec matching radius, columns 5 and 6 list the ID
and 5007{A}, magnitude from Hui et al. (1993ApJS...88..423H 1993ApJS...88..423H, Cat.
J/ApJS/88/423), and in the last column the ID from Peng et al.
(2004ApJ...602..685P 2004ApJ...602..685P, Cat. J/ApJ/602/685).
PN candidates from literature (Table 7 of Peng et al. 2004, Cat.
J/ApJ/602/685) that have no radial velocity measurements to date are
listed in table 8. The RA and DEC are shifted to match the astrometric
system of Table 7. ID and 5007Å magnitude are from Hui et al.
(1993, Cat. J/ApJS/88/423).
Radial velocity, radial velocity error and 5007Å line FWHM
measurements for 1107 single velocity component PNe are collected in
table 9 observed with FLAMES within the SV and GO runs. In addition
identifiers from EMMI, Hui et al. (1993, Cat. J/ApJS/88/423), and Peng
et al. (2004, Cat. J/ApJ/602/685) catalogues, 5007Å magnitudes from
EMMI and Hui et al. (1993, Cat. J/ApJS/88/423) are listed, as well as
radial velocities from Peng et al. (2004, Cat. J/ApJ/602/685), for
those PN in common between the matched catalogues. Note that the
coordinates of the PN observed in the SV run are offset by
Δα=-0.225-arcseconds and Δδ=-0.093-arcseconds
with respect to the EMMI astrometry that was used for the GO run.
Relative flux of the [OIII]5007Å line, the [OIII]5007Å/Hβ
and the HeII4686Å/Hβ line ratio measurements (where Hβ
and HeII lines detected) for all PN observed with FLAMES within the SV
and GO runs.
An additional 132 PNe with radial velocity measurements from Peng et
al. (2004, Cat. J/ApJ/602/685) that were not observed with FLAMES are
listed in table 11. The velocities listed are taken directly from the
Peng et al. (2004, Cat. J/ApJ/602/685) catalogue and should be shifted
by +7.9km/s when combining with the FLAMES velocities in table 9 in
order to produce a single coherent dataset. The RA and DEC are shifted
to match the astrometric system of table 7.
For PNe with double and triple component line detections, see Table 12
of the paper.
For PN/emission line targets detected at the positions of globular
clusters, see Table 13 of the paper.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table7.dat 59 1060 PN candidates from on-off band [OIII] imaging
table8.dat 46 58 PN candidates from literature without
radial velocities
table9.dat 104 1107 *For all PNe with single line velocities, radial
velocity and emission line fits from FLAMES
spectroscopy
table10.dat 58 1107 For all PNe with single line velocities,
relative flux of [OIII] 5007Å and line ratio
5007Å to Hβ and HeII 4686Å to Hβ
table11.dat 65 132 PNe with radial velocity from Table 6 of Peng et
al. (2004, Cat. J/ApJ/602/685) not observed with
FLAMES
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Note on table9.dat: This electronic version of table 9 has one extra column,
differing from Table 9 of the paper. Col. 2 of this electronic version of
the table lists the catalogue name.
FLAMES Medusa fibres for 3 targets, observed in the SV run, were incorrectly
positioned at coordinates not corresponding to the those in the Hui et al.
1993 (J/ApJS/88/423) catalogue. However emission lines were detected at
these positions. The three PN are named WRWSVPN1, WRWSVPN2, WRWSVPN3
in table 9, and also in table 10. It was found that the coordinates of the
following PN from Hui et al. 1993 (J/ApJS/88/423) were incorrectly
transcribed in the Vizier on-line catalogue: 231, 1301 and 4414.
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See also:
J/ApJS/88/423 : PNe in NGC 5128 (Hui+ 1993)
J/ApJ/449/592 : NGC 5128 PN. III. (Hui+ 1995)
J/ApJ/602/685 : NGC 5128 planetary nebulae (Peng+, 2004)
Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- EMMI [3/2560] EMMI ID number
7- 8 I2 h RAh Right ascension (J2000.0)
10- 11 I2 min RAm Right ascension (J2000.0)
13- 17 F5.2 s RAs Right ascension (J2000.0)
19 A1 --- DE- Declination sign (J2000.0)
20- 21 I2 deg DEd Declination (J2000.0)
23- 24 I2 arcmin DEm Declination (J2000.0)
26- 29 F4.1 arcsec DEs Declination (J2000.0)
32- 36 F5.2 mag m5007E 5007Å magnitude (EMMI)
39- 43 I5 --- H93 [253/42127]? Corresponding ID in
Hui et al. 1993 (G1)
46- 50 F5.2 mag m5007H ? 5007Å magnitude (Hui et al., 1993) (G1)
53- 59 A7 --- P04 Corresponding ID in Peng et al. 2004) (G1)
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- P04 Peng et al. (2004) catalogue name (G1)
10- 11 I2 h RAh Right Ascension J2000 (hours)
13- 14 I2 min RAm Right Ascension J2000 (minutes)
16- 20 F5.2 s RAs Right Ascension J2000 (seconds)
22 A1 --- DE- Declination J2000 (sign)
23- 24 I2 deg DEd Declination J2000 (degrees)
26- 27 I2 arcmin DEm Declination J2000 (minutes)
29- 32 F4.1 arcsec DEs Declination J2000 (seconds)
35- 39 I5 --- H93 [232/6122]? Corresponding ID in Hui et al. (G1)
42- 46 F5.2 mag m5007H ? 5007Å magnitude (Hui et al., 1993) (G1)
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Byte-by-byte Description of file: table9.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
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1- 2 A2 --- OB [GO SV] Observing block:
GO=Open time; SV=Science Verification
4- 18 A15 --- Name Source name (G2)
21- 22 I2 h RAh Right Ascension J2000 (hours)
24- 25 I2 min RAm Right Ascension J2000 (minutes)
27- 31 F5.2 s RAs Right Ascension J2000 (seconds)
33 A1 --- DE- Declination J2000 (sign)
34- 35 I2 deg DEd Declination J2000 (degrees)
37- 38 I2 arcmin DEm Declination J2000 (minutes)
40- 43 F4.1 arcsec DEs Declination J2000 (seconds)
46- 51 F6.1 km/s RV [70/1001] Radial velocity
53- 56 F4.1 km/s e_RV [0.1/23.6] Radial velocity error (1-sigma)
59- 63 F5.1 km/s FWHM [12/179] Full width half maximum of [OIII]
5007Å emission line
66- 69 I4 --- EMMI [2/2518]? EMMI catalogue number
72- 76 F5.2 mag m5007E ? 5007Å magnitude (EMMI)
79- 83 I5 --- H93 ? Corresponding ID in Hui et al. (1993) (G1)
86- 90 F5.2 mag m5007H ? 5007Å magnitude (Hui et al., 1993) (G1)
93- 99 A7 --- P04 Corresponding ID in Peng et al. (2004) (G1)
102-104 I3 km/s RVP ? Radial velocity in Peng et al. (2004) (G1)
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Byte-by-byte Description of file: table10.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name Catalogue name (G2)
18- 19 I2 h RAh Right Ascension J2000 (hours)
21- 22 I2 min RAm Right Ascension J2000 (minutes)
24- 28 F5.2 s RAs Right Ascension J2000 (seconds)
30 A1 --- DE- Declination J2000 (sign)
31- 32 I2 deg DEd Declination J2000 (degrees)
34- 35 I2 arcmin DEm Declination J2000 (minutes)
37- 40 F4.1 arcsec DEs Declination J2000 (seconds)
43- 47 F5.1 --- F5007 [1/187] Line flux [OIII]5007Å
(relative units)
50- 53 F4.1 --- OIII/Hb [0.1/44]? Ratio [OIII]5007Å to Hβ
56- 58 F3.1 --- HeII/Hb [0.2/1.2]? Ratio HeII4686Å to Hβ
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- P04 ID in Peng et al. (2004) (G1)
11- 12 I2 h RAh Right Ascension J2000 (hours)
14- 15 I2 min RAm Right Ascension J2000 (minutes)
17- 21 F5.2 s RAs Right Ascension J2000 (seconds)
23 A1 --- DE- Declination J2000 (sign)
24- 25 I2 deg DEd Declination J2000 (degrees)
27- 28 I2 arcmin DEm Declination J2000 (minutes)
30- 33 F4.1 arcsec DEs Declination J2000 (seconds)
36- 38 I3 km/s RV Radial velocity
41- 45 I5 --- H93 ? Corresponding ID in Hui et al. (1993) (G1)
48- 52 F5.2 mag m5007H ? 5007Å magnitude (Hui et al., 1993) (G1)
55- 58 I4 --- EMMI ? Corresponding EMMI ID
61- 65 F5.2 mag m5007E ? EMMI 5007Å magnitude
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Global notes:
Note (G1): Identifications in
* Hui et al. 1993 (J/ApJS/88/423), <[HFC93] NNNNN> in Simbad.
* Peng et al. 2004 (J/ApJ/602/685), [PFF2004b] in Simbad
Note (G2): Source name is:
* EMMI_NNNNN for EMMI names (table7)
* Hui93_NNNNN for Hui et al. 1993 (J/ApJS/88/423),
* P04_AAAAAAAA for Peng et al. 2004 (J/ApJ/602/685)
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Acknowledgements:
J.R. Walsh, jwalsh(at)eso.org
(End) Patricia Vannier [CDS] 19-Dec-2014