J/A+A/547/A78 Catalog of NGC 300 planetary nebula candidates (Pena+, 2012)
A catalog of planetary nebula candidates in the Sculptor spiral galaxy NGC300.
Pena M., Reyes-Perez J., Hernandez-Martinez L., Perez-Guillen M.
<Astron. Astrophys. 547, A78 (2012)>
=2012A&A...547A..78P 2012A&A...547A..78P
ADC_Keywords: Galaxies, nearby ; Planetary nebulae
Keywords: galaxies: distances and redshifts - galaxies: individual: NGC 300 -
planetary nebulae: general - HII regions
Abstract:
[OIII]5007 Angstroms on-band off-band images, obtained with the Very
Large Telescope (VLT) and FORS2 spectrograph in two zones (center and
outskirts) of the spiral galaxy NGC300, are analyzed searching for
emission line objects. In particular we search for planetary nebula
(PN) candidates to analyze their distribution and luminosity
properties, to perform follow-up spectroscopy, and to study the
planetary nebula luminosity function, PNLF.
In the continuum-subtracted images, a large number of emission line
objects were detected. From this sample we selected as PN candidates
those objects with stellar appearance and no detectable central star.
[OIII]5007 instrumental magnitudes were measured and calibrated by
using spectrophotometric data from the follow-up spectroscopy.We have
identified more than a hundred PN candidates and a number of compact
HII regions. The PN sample is the largest one reported for this galaxy
so far. For all the objects we present coordinates, instrumental
[OIII]5007 magnitudes and apparent nebular [OIII]5007 fluxes and
magnitudes. The [OIII]5007 observed luminosity function for PNe (PNLF)
was calculated for the whole sample and for the central and outskirts
samples. The three PNLF are similar within uncertainties. We fit the
empirical PNLF to the observed PNLF for all the samples. From our best
fit for the whole sample we derived a maximum value for the apparent
magnitudes of mstar(5007)=22.019±0.022 and we obtained a tentative
estimate of the distance modulus
m(5007)-M(5007)=26.29+0.12-0.22mag, which agrees well with the
recent value derived from Cepheid stars.
Description:
Photometric properties of PN candidates and compact HII regions in
NGC 300. [OIII] (5007Å) images were cobtained at the Very Large
Telescope, VLT, UT1 of the European Southern Observatory (ESO),
equipped with the spectrograph FORS-2n on 2006-07-04. Follow-up
spectroscopy for more than 40 objects that were classified as PN
candidates and compact HII regions in our imaging), was carried out
with the same telescope and instrument (VLT and FORS2 in MXU mode),
2006-08-19 to 2006-08-22.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 92 112 Catalog of 112 planetary nebula in NGC300
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See also:
J/MNRAS/405/1349 : LMC PNe [OIII] 5007Å and Hβ flux (Reid+, 2010)
J/A+A/306/9 : PNe and HII in NGC 300 (Soffner+, 1996)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Identification Number
7- 8 I2 h RAh Right Ascencion (J2000.0)
10- 11 I2 min RAm Right Ascencion (J2000.0)
13- 17 F5.2 s RAs Right Ascencion (J2000.0)
21 A1 --- DE- Declination sign (J2000.0)
22- 23 I2 deg DEd Declination (J2000.0)
25- 26 I2 arcmin DEm Declination (J2000.0)
28- 32 F5.2 arcsec DEs Declination (J2000.0)
36- 40 F5.2 mag mi(5007) ? Instrumental magnitude of [OIII](5007Å)
44- 47 F4.2 mag e_mi(5007) ? Instrumental magnitude error
51- 57 F7.3 [mW/m2] logF1 ? Log of 5007Å flux from spectroscopy (1)
61- 67 F7.3 [mW/m2] logF2 ? Flux calculated from equation (2)
71- 75 F5.2 mag m(5007) ? Magnitude of [OIII] line at 5007Å
78- 92 A15 --- Com Other ID, and comments (3)
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Note (1): Flux from spectroscopy, in erg/cm2/s.
Note (2): Flux calculated from the equation in Fig.2, in erg/cm2/s.
Note (3): Other IDs are:
SNN = IDs for PNe from Soffner et al. (1996, Cat. J/A+A/306/9);
<[SMJ96] PN NN> in Simbad.
DNNNA = IDs for compact HII regions (cHII) from Deharveng et al.
(1988A&AS...73..407D 1988A&AS...73..407D); <[DCL88] NNNA> in Simbad.
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Acknowledgements:
Miriam Pena, miriam(at)astro.unam.mx
(End) Patricia Vannier [CDS] 12-Sep-2012