Chemical abundances of planetary nebulae in the substructures of M31 : II. The extended sample and a comparison study with the Outer-disk Group

We report deep spectroscopy of 10 planetary nebulae (PNe) in the Andromeda Galaxy (M31) using the 10.4 m Gran Telescopio Canarias (GTC). Our targets reside in different regions of M31, including halo streams and the dwarf satellite M32, and kinematically deviate from the extended disk. The temperatu...

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Autores principales:	Fang, Xuan, García Benito, Rubén, Guerrero, Martín A., Zhang, Yong, Liu, Xiaowei, Morisset, Christophe, Karakas, Amanda I., Miller Bertolami, Marcelo Miguel, Yuan, Haibo, Cabrera Lavers, Antonio
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2018
Materias:	Astronomía galaxies: abundances galaxies: evolution galaxies: individual (M31) ISM: abundances planetary nebulae: general stars: evolution
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/93569 https://iopscience.iop.org/0004-637X/853/1/50/ https://ri.conicet.gov.ar/handle/11336/82602
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-93569
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Astronomía galaxies: abundances galaxies: evolution galaxies: individual (M31) ISM: abundances planetary nebulae: general stars: evolution
spellingShingle	Astronomía galaxies: abundances galaxies: evolution galaxies: individual (M31) ISM: abundances planetary nebulae: general stars: evolution Fang, Xuan García Benito, Rubén Guerrero, Martín A. Zhang, Yong Liu, Xiaowei Morisset, Christophe Karakas, Amanda I. Miller Bertolami, Marcelo Miguel Yuan, Haibo Cabrera Lavers, Antonio Chemical abundances of planetary nebulae in the substructures of M31 : II. The extended sample and a comparison study with the Outer-disk Group
topic_facet	Astronomía galaxies: abundances galaxies: evolution galaxies: individual (M31) ISM: abundances planetary nebulae: general stars: evolution
description	We report deep spectroscopy of 10 planetary nebulae (PNe) in the Andromeda Galaxy (M31) using the 10.4 m Gran Telescopio Canarias (GTC). Our targets reside in different regions of M31, including halo streams and the dwarf satellite M32, and kinematically deviate from the extended disk. The temperature-sensitive [O III] λ4363 line is observed in all PNe. For four PNe, the GTC spectra extend beyond 1 μm, enabling the explicit detection of the [S III] λ6312 and λλ9069, 9531 lines and thus determination of the [S III] temperature. Abundance ratios are derived and generally consistent with AGB model predictions. Our PNe probably all evolved from low-mass (<2 M⊙) stars, as analyzed with the most up-to-date post-AGB evolutionary models, and their main-sequence ages are mostly ∼2-5 Gyr. Compared to the underlying, smooth, metal-poor halo of M31, our targets are uniformly metal rich ([O/H] ≳ -0.4), and seem to resemble the younger population in the stream. We thus speculate that our halo PNe formed in the Giant Stream's progenitor through extended star formation. Alternatively, they might have formed from the same metal-rich gas as did the outer-disk PNe but were displaced into their present locations as a result of galactic interactions. These interpretations are, although speculative, qualitatively in line with the current picture, as inferred from previous wide-field photometric surveys, that M31's halo is the result of complex interactions and merger processes. The behavior of the N/O of the combined sample of the outer-disk and our halo/substructure PNe signifies that hot bottom burning might actually occur at <3 M⊙ but careful assessment is needed.
format	Articulo Articulo
author	Fang, Xuan García Benito, Rubén Guerrero, Martín A. Zhang, Yong Liu, Xiaowei Morisset, Christophe Karakas, Amanda I. Miller Bertolami, Marcelo Miguel Yuan, Haibo Cabrera Lavers, Antonio
author_facet	Fang, Xuan García Benito, Rubén Guerrero, Martín A. Zhang, Yong Liu, Xiaowei Morisset, Christophe Karakas, Amanda I. Miller Bertolami, Marcelo Miguel Yuan, Haibo Cabrera Lavers, Antonio
author_sort	Fang, Xuan
title	Chemical abundances of planetary nebulae in the substructures of M31 : II. The extended sample and a comparison study with the Outer-disk Group
title_short	Chemical abundances of planetary nebulae in the substructures of M31 : II. The extended sample and a comparison study with the Outer-disk Group
title_full	Chemical abundances of planetary nebulae in the substructures of M31 : II. The extended sample and a comparison study with the Outer-disk Group
title_fullStr	Chemical abundances of planetary nebulae in the substructures of M31 : II. The extended sample and a comparison study with the Outer-disk Group
title_full_unstemmed	Chemical abundances of planetary nebulae in the substructures of M31 : II. The extended sample and a comparison study with the Outer-disk Group
title_sort	chemical abundances of planetary nebulae in the substructures of m31 : ii. the extended sample and a comparison study with the outer-disk group
publishDate	2018
url	http://sedici.unlp.edu.ar/handle/10915/93569 https://iopscience.iop.org/0004-637X/853/1/50/ https://ri.conicet.gov.ar/handle/11336/82602
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bdutipo_str	Repositorios
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Chemical abundances of planetary nebulae in the substructures of M31 : II. The extended sample and a comparison study with the Outer-disk Group

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