J/A+A/637/A62 Fornax3D. Planetary nebulae automated detection (Spriggs+, 2020)
Fornax 3D project: automated detection of planetary nebulae in the centres of
early-type galaxies and first results.
Spriggs T.W., Sarzi M., Napiwotzki R., Galan-de Anta P.M., Viaene S.,
Nedelchev B., Coccato L., Corsini E.M., de Zeeuw P.T., Falcon-Barroso J.,
Gadotti D.A., Iodice E., Lyubenova M., Martin-Navarro I., McDermid R.M.,
Pinna F., van de Ven G., Zhu L.
<Astron. Astrophys. 637, A62 (2020)>
=2020A&A...637A..62S 2020A&A...637A..62S (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Planetary nebulae ; Magnitudes
Keywords: planetary nebulae: general - galaxies: elliptical and lenticular, cD -
galaxies: distances and redshift - techniques: imaging spectroscopy
Abstract:
Extragalactic Planetary Nebulae (PNe) are detectable via relatively
strong nebulous [OIII] emission, acting as direct probes into the
local stellar population. Due to an apparently universal, invariant
magnitude cut-off, PNe are also considered to be a remarkable standard
candle for distance estimation. Through detecting PNe within the
galaxies, we aim to connect the relative abundances of PNe to the
properties of their host galaxy stellar population. By removing the
stellar background components from FCC 167 and FCC 219, we aim to
produce PN Luminosity Functions (PNLF) of those galaxies, and
therefore also estimate the distance modulus to those two systems.
Finally, we test the reliability and robustness of the our novel
detection and analysis method. It detects the presence of unresolved
point sources via their [OIII] 5007Å emission, within regions
previously unexplored. We model the [OIII] emissions in both the
spatial and spectral dimensions together, as afforded to us by the
Multi Unit Spectroscopic Explorer (MUSE) and drawing on data gathered
as part of the Fornax3D survey. For each source, we inspect the
properties of the nebular emission lines present to remove other
sources, that could hinder the safe construction of the PNLF, such as
supernova remnants and HII regions. As a further step, we characterise
any potential limitations and draw conclusions about the reliability
of our modelling approach via a set of simulations. Through the
application of this novel detection and modelling approach to IFU
observations, we report for both galaxies: distance estimates,
luminosity specific PNe frequency values. Furthermore, we include an
overview into source contamination, galaxy differences and how they
may affect the PNe populations in the dense stellar environments.
Description:
Source catalogues for FCC167 (table 4) and FCC219 (table 5): Source ID
(using the IAU standard, with the Fornax3D; F3D, prefix), RA and Dec,
magnitude in [OIII] 5007Å, signal to residual noise, line of sight
velocity (km/s) and Object ID label (PNe, SNR, HII, OvLu
(Over-Luminous) or Interl (Interloper).
Objects:
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RA (ICRS) DE Designation(s)
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03 36 27.59 -34 58 34.7 FCC167 = NGC 1380
03 38 51.92 -35 35 39.8 FCC219 = NGC 1404
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 76 98 FCC167 catalogued sources
table5.dat 73 63 FCC219 catalogued sources
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Byte-by-byte Description of file: table4.dat table5.dat
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Bytes Format Units Label Explanations
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1- 24 A24 --- PN-ID Unique Planetary Nebulae ID,
F3D JHHMMSS.ss+DDMMSS.ss
26- 27 I2 h RAh Right Ascension (J2000)
29- 30 I2 min RAm Right Ascension (J2000)
32- 36 F5.2 s RAs Right Ascension (J2000)
39 A1 --- DE- Declination sign (J2000)
40- 41 I2 deg DEd Declination (J2000)
43- 44 I2 arcmin DEm Declination (J2000)
46- 50 F5.2 arcsec DEs Declination (J2000)
53- 57 F5.2 mag m5007 Apparent magnitude in 5007Å
59- 62 F4.1 --- A/rN Amplitude over residual noise ratio
64- 69 F6.1 km/s LOSVD Line of Sight Velocity Dispersion (km/s)
71- 76 A6 --- Type Type of source (1)
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Note (1): Type as follows:
PN = Planetary Nebula
SNR = SuperNova Remnant
HII = compact HII region
interl = interloper
OvLu = Over-luminous source
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Acknowledgements:
Thomas William Spriggs, tspriggs(at)outlook.com
(End) Thomas Spriggs [Univ. Hertfordshire], Patricia Vannier [CDS] 24-Mar-2020