The Abundance Gradient in NGC 3344

Vı́lchez, J. M.; Edmunds, M. G.; Pagel, B. E. J.

doi:10.1086/132343

Cited by 6 publications

(2 citation statements)

References 6 publications

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“…The plot with [N II]/Hα has less scatter and a higher probability, and may therefore suggests a higher metallicity for the SNRs near the galaxy centre. This result is agreement with the strong abundance gradient for H I regions found by(McCall et al 1981) and confirmed by(Vilchez et al 1988).…”

supporting

confidence: 92%

3D optical spectroscopic study of NGC 3344 with SITELLE: I. Identification and confirmation of supernova remnants

Moumen

Robert

Devost

et al. 2019

Monthly Notices of the Royal Astronomical Society

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We present the first optical identification and confirmation of a sample of supernova remnants (SNRs) in the nearby galaxy NGC 3344. Using high spectral and spatial resolution data, obtained with the CFHT imaging Fourier transform spectrograph SITELLE, we identified about 2200 emission line regions, many of which are H II regions, diffuse ionized gas regions, and also SNRs. Considering the stellar population and diffuse ionized gas background, that are quite important in NGC 3344, we have selected 129 SNR candidates based on four criteria for regions where the emission lines flux ratio [S II]/Hα ≥ 0.4. Emission lines of [O II]λ3727, Hβ, [O III]λλ4959,5007, Hα, [N II]λλ6548,6583, and [S II]λλ6716,6731 have been measured to study the ionized gas properties of the SNR candidates. We adopted a self-consistent spectroscopic analysis, based on Sabbadin plots and BPT diagrams, to confirm the shock-heated nature of the ionization mechanism in the candidates sample. With this analysis, we end up with 42 Confirmed SNRs, 45 Probable SNRs, and 42 Less likely SNRs. Using shock models, the Confirmed SNRs seems to have a metallicity ranging between LMC and 2×solar. We looked for correlations between the size of the Confirmed SNRs and their emission lines ratios, their galaxy environment, and their galactocentric distance: we see a trend for a metallicity gradient among the SNR population, along with some evolutionary effects.

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supporting

confidence: 92%

3D optical spectroscopic study of NGC 3344 with SITELLE: I. Identification and confirmation of supernova remnants

Moumen

Robert

Devost

et al. 2019

Monthly Notices of the Royal Astronomical Society

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“…The adopted properties of our galaxies. NGC 0598 (M 33) Smith (1975), Kwitter & Aller (1981), McCall et al (1985, Díaz et al (1987), Vílchez et al (1988b), Bresolin et al (1999) NGC 5457 (M 101) Smith (1975), Hawley (1978), Sedwick & Aller (1981), Rayo et al (1982), Skillman (1985), McCall et al (1985), Torres-Peimbert et al (1989), Kinkel & Rosa (1994), Garnett & Kennicutt (1994), Kennicutt & Garnett (1996) NGC 7793 Webster & Smith (1983), ), McCall et al (1985, Bibby & Crowther (2010) IC 0010 Lequeux et al (1979)…”

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confidence: 99%

The Abundance Properties of Nearby Late-Type Galaxies. I. The Data

2014

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We investigate the oxygen and nitrogen abundance distributions across the optical disks of 130 nearby late-type galaxies using around 3740 published spectra of H ii regions. We use these data in order to provide homogeneous abundance determinations for all objects in the sample, including H ii regions in which not all of the usual diagnostic lines were measured. Examining the relation between N and O abundances in these galaxies we find that the abundances in their centres and at their isophotal R 25 disk radii follow the same relation. The variation in N/H at a given O/H is around 0.3 dex. We suggest that the observed spread in N/H may be partly caused by the time delay between N and O enrichment and the different star formation histories in galaxies of different morphological types and dimensions. We study the correlations between the abundance properties (central O and N abundances, radial O and N gradients) of a galaxy and its morphological type and dimension.

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Oxygen and nitrogen abundances in nearby galaxies

Pilyugin¹,

Vı́lchez²,

Contini³

2004

A&A

306

409

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Abstract. We performed a compilation of more than 1000 published spectra of H  regions in spiral galaxies. The oxygen and nitrogen abundances in each H  region were recomputed in a homogeneous way, using the P-method. The radial distributions of oxygen and nitrogen abundances were derived. The correlations between oxygen abundance and macroscopic properties are examined. We found that the oxygen abundance in spiral galaxies correlates with its luminosity, rotation velocity, and morphological type: the correlation with the rotation velocity may be slightly tighter. There is a significant difference between the luminosity-metallicity relationship obtained here and that based on the oxygen abundances determined through the R 23 -calibrations. The oxygen abundance of NGC 5457 recently determined using direct measurements of T e (Kennicutt et al. 2003) agrees with the luminosity-metallicity relationship derived in this paper, but is in conflict with the luminosity-metallicity relationship derived with the R 23 -based oxygen abundances. The obtained luminosity-metallicity relation for spiral galaxies is compared to that for irregular galaxies. Our sample of galaxies shows evidence that the slope of the O/H − M B relationship for spirals (−0.079 ± 0.018) is slightly more shallow than that for irregular galaxies (−0.139 ± 0.011). The effective oxygen yields were estimated for spiral and irregular galaxies. The effective oxygen yield increases with increasing luminosity from M B ∼ −11 to M B ∼ −18 (or with increasing rotation velocity from V rot ∼ 10 km s −1 to V rot ∼ 100 km s −1 ) and then remains approximately constant. Irregular galaxies from our sample have effective oxygen yields lowered by a factor of 3 at maximum, i.e. irregular galaxies usually keep at least 1/3 of the oxygen they manufactured during their evolution.

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The Abundance Gradient in NGC 3344

Abstract: The steep abundance gradient found by McCall, Shields, and Rybski (1981) in the Sbc galaxy NGC 3344 is confirmed by a measurement of the electron temperature in the outer H II region.

Cited by 6 publications

References 6 publications

3D optical spectroscopic study of NGC 3344 with SITELLE: I. Identification and confirmation of supernova remnants

3D optical spectroscopic study of NGC 3344 with SITELLE: I. Identification and confirmation of supernova remnants

The Abundance Properties of Nearby Late-Type Galaxies. I. The Data

Oxygen and nitrogen abundances in nearby galaxies

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