2009A&A...494..515S


Query : 2009A&A...494..515S

2009A&A...494..515S - Astronomy and Astrophysics, volume 494, 515-525 (2009/2-1)

VLT/FORS1 spectrophotometry of the first planetary nebula discovered in the Phoenix dwarf galaxy.

SAVIANE I., EXTER K., TSAMIS Y., GALLART C. and PEQUIGNOT D.

Abstract (from CDS):

A planetary nebula (PN) candidate was discovered during FORS imaging of the Local Group dwarf galaxy Phoenix. We use this PN to complement abundances from red-giant stars. FORS spectroscopy was used to confirm the PN classification. Empirical methods and photoionization modeling were used to derive elemental abundances from the emission line fluxes and to characterize the central star. For the elements deemed most reliable for measuring the metallicity of the interstellar medium (ISM) from which the PN formed, [O/H]~-0.46 and [Ar/H]~-1.03. [O/H] has lower measurement errors but greater uncertainties due to the unresolved issue of oxygen enrichment in the PN precursor star. Earlier than 2Gyr ago (the lower limit of the derived age for the central star) the ISM had Z=0.002-0.008, a range slightly more metal-rich than the one provided by stars. Comparing our PN-to-stellar values to surveys of other dwarf Local Group galaxies, Phoenix appears to be an outlier.

Abstract Copyright:

Journal keyword(s): galaxies: dwarf - ISM: planetary nebulae: individual: PN Phoenix J01:51:05.46-44:26:55.28 - galaxies: individual: Phoenix

Nomenclature: Text: [SET2009] J015105.46-442655.28

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1280 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10678 1
3 [SET2009] J015105.46-442655.28 PN 01 51 05.460 -44 26 55.28           ~ 1 0
4 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 512 2
5 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6691 1
6 CPD-69 177 WD* 03 10 31.0195960176 -68 36 03.380768388 10.757 11.413 11.394 11.47 11.558 DA3.0 263 0
7 NGC 3109 G 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 748 2
8 NGC 3918 PN 11 50 17.7709504944 -57 10 57.017302428   10.0 8.5     ~ 377 0
9 NAME SDG G 18 55 03.1 -30 28 42   4.5 3.6     ~ 2076 2
10 NAME Local Group GrG ~ ~           ~ 8038 0

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2023.05.30-00:22:41

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