Identification and analysis of the young population in the starburst galaxy NGC 253

We present a study of the young population in the starburst galaxy NGC 253. In particular, we focused our attention on searching young star groups, obtaining their main properties and studying their hierarchical organization. For this task, we used multiband images and their corresponding photometri...

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Autores principales:	Rodríguez, María Jimena, Baume, Gustavo Luis, Feinstein Baigorri, Carlos
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2018
Materias:	Ciencias Astronómicas Stars: early-type Stars: luminosity function, mass function Galaxies: individual: NGC 253 Galaxies: star clusters: general Galaxies: structure Galaxies: star formation
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/93931 https://academic.oup.com/mnras/article/479/1/961/5049649
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-93931
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Astronómicas Stars: early-type Stars: luminosity function, mass function Galaxies: individual: NGC 253 Galaxies: star clusters: general Galaxies: structure Galaxies: star formation
spellingShingle	Ciencias Astronómicas Stars: early-type Stars: luminosity function, mass function Galaxies: individual: NGC 253 Galaxies: star clusters: general Galaxies: structure Galaxies: star formation Rodríguez, María Jimena Baume, Gustavo Luis Feinstein Baigorri, Carlos Identification and analysis of the young population in the starburst galaxy NGC 253
topic_facet	Ciencias Astronómicas Stars: early-type Stars: luminosity function, mass function Galaxies: individual: NGC 253 Galaxies: star clusters: general Galaxies: structure Galaxies: star formation
description	We present a study of the young population in the starburst galaxy NGC 253. In particular, we focused our attention on searching young star groups, obtaining their main properties and studying their hierarchical organization. For this task, we used multiband images and their corresponding photometric data obtained with the Advanced Camera for Surveys of the Hubble Space Telescope (ACS/HST).We have first derived the absorption affecting the different regions of the galaxy. Then, we applied an automatic and objective searching method over the corrected data in order to detect young star groups. We complemented this result with the construction of the stellar density map for the blue young population. A statistical procedure to decontaminate the photometric diagrams from field stars was applied over the detected groups and we estimated their fundamental parameters.As a result, we built a catalog of 875 new identified young groups with their main characteristics, including coordinates, sizes, estimated number of members, stellar densities, luminosity function (LF) slopes and galactocentric distances. We observed these groups delineate different structures of the galaxy, and they are the last step in the hierarchical way in which the young population is organized. From their size distribution, we found they have typical radius of ∼ 40 − 50 pc. These values are consistent with those ones found in others nearby galaxies. We estimated a mean value of the LF slope of 0.21 and an average density of 0.0006 stars/pc³ for the identified young groups taking into account stars earlier than B6.
format	Articulo Articulo
author	Rodríguez, María Jimena Baume, Gustavo Luis Feinstein Baigorri, Carlos
author_facet	Rodríguez, María Jimena Baume, Gustavo Luis Feinstein Baigorri, Carlos
author_sort	Rodríguez, María Jimena
title	Identification and analysis of the young population in the starburst galaxy NGC 253
title_short	Identification and analysis of the young population in the starburst galaxy NGC 253
title_full	Identification and analysis of the young population in the starburst galaxy NGC 253
title_fullStr	Identification and analysis of the young population in the starburst galaxy NGC 253
title_full_unstemmed	Identification and analysis of the young population in the starburst galaxy NGC 253
title_sort	identification and analysis of the young population in the starburst galaxy ngc 253
publishDate	2018
url	http://sedici.unlp.edu.ar/handle/10915/93931 https://academic.oup.com/mnras/article/479/1/961/5049649
work_keys_str_mv	AT rodriguezmariajimena identificationandanalysisoftheyoungpopulationinthestarburstgalaxyngc253 AT baumegustavoluis identificationandanalysisoftheyoungpopulationinthestarburstgalaxyngc253 AT feinsteinbaigorricarlos identificationandanalysisoftheyoungpopulationinthestarburstgalaxyngc253
bdutipo_str	Repositorios
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Identification and analysis of the young population in the starburst galaxy NGC 253

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