J/A+A/549/A115 Velocities of Planetary Nebula in 5 galaxies (Cortesi+, 2013)
Planetary Nebula Spectrograph survey of S0 galaxy kinematics. Data and overview.
Cortesi A., Arnaboldi M., Coccato L., Merrifield M.R., Gerhard O.,
Bamford S., Romanowsky A.J., Napolitano N.R., Douglas N.G., Kuijken K.,
Capaccioli M., Freeman K.C., Chies-Santos A.L., Pota V.
<Astron. Astrophys. 549, A115 (2013)>
=2013A&A...549A.115C 2013A&A...549A.115C
ADC_Keywords: Galaxy catalogs ; Planetary nebulae ; Radial velocities
Keywords: galaxies: elliptical and lenticular - galaxies: evolution -
galaxies: formation - galaxies: kinematics and dynamics -
galaxies: stellar content
Abstract:
The origins of S0 galaxies remain obscure, with various mechanisms
proposed for their formation, likely depending on environment. These
mechanisms would imprint different signatures in the galaxies' stellar
kinematics out to large radii, offering a method for distinguishing
between them.
We aim to study a sample of six S0 galaxies from a range of
environments, and use planetary nebulae (PNe) as tracers of their
stellar populations out to very large radii, to determine their
kinematics in order to understand their origins.
Using a special-purpose instrument, the Planetary Nebula Spectrograph,
we observe and extract PNe catalogues for these six systems.
We show that the PNe have the same spatial distribution as the
starlight, that the numbers of them are consistent with what would be
expected in a comparable old stellar population in elliptical
galaxies, and that their kinematics join smoothly onto those derived
at smaller radii from conventional spectroscopy.
The high-quality kinematic observations presented here form an
excellent set for studying the detailed kinematics of S0 galaxies, in
order to unravel their formation histories. We find that PNe are good
tracers of stellar kinematics in these systems. We show that the
recovered kinematics are largely dominated by rotational motion,
although with significant random velocities in most cases.
Objects:
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RA (2000) DE Designation(s)
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10 05 13.80 -07 43 08.0 NGC 3115 = LEDA 29265
23 00 59.93 +30 08 41.6 NGC 7457 = LEDA 70258
09 11 37.50 +60 02 13.9 NGC 2768 = LEDA 25915
11 00 18.59 +13 54 04.5 NGC 3489 = LEDA 33160
10 48 16.90 +12 37 42.9 NGC 3384 = LEDA 32292
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 54 189 Catalogue of PNe in NGC 3115
table4.dat 54 113 Catalogue of PNe in NGC 7457
table5.dat 54 315 Catalogue of PNe in NGC 2768
table6.dat 54 60 Catalogue of PNe in NGC 3489
table7.dat 54 93 Catalogue of PNe in NGC 3384
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Byte-by-byte Description of file: table?.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- --- [PNSE-]
9- 17 A9 --- Name Name of the PN, PNS-EPN-Nnnnn-NNN (1)
19- 20 I2 h RAh QSO Right ascension (J2000)
22- 23 I2 min RAm QSO Right ascension (J2000)
25- 28 F4.1 s RAs QSO Right ascension (J2000)
30 A1 --- DE- QSO Declination sign (J2000)
31- 32 I2 deg DEd QSO Declination (J2000)
34- 35 I2 arcmin DEm QSO Declination (J2000)
37- 40 F4.1 arcsec DEs QSO Declination (J2000)
42- 48 F7.2 km/s HV Heliocentric velocity, measured from
the [OIII] 5007Å line
50- 54 F5.2 mag mag ?=- Instrumental magnitude
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Note (1): the full name is written <PNS-EPN-Nnnnn-NNN>, where nnnn
cotnains the NGC number of the galaxy, and NNN is an order number.
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Acknowledgements:
Arianna Cortesi, aricorte(at)gmail.com
(End) Patricia Vannier [CDS] 14-Nov-2012