Repositorio Institucional
Repositorio Institucional
CONICET Digital
  • Inicio
  • EXPLORAR
    • AUTORES
    • DISCIPLINAS
    • COMUNIDADES
  • Estadísticas
  • Novedades
    • Noticias
    • Boletines
  • Ayuda
    • General
    • Datos de investigación
  • Acerca de
    • CONICET Digital
    • Equipo
    • Red Federal
  • Contacto
JavaScript is disabled for your browser. Some features of this site may not work without it.
  • INFORMACIÓN GENERAL
  • RESUMEN
  • ESTADISTICAS
 
Artículo

Uncovering the nucleus candidate for NGC 253

Gunthardt, Guillermo Ivan; Agüero, Maria PazIcon ; Camperi, Javier Antonio; Diaz, Ruben JoaquinIcon ; Gomez, P. L.; Bosch, Guillermo LuisIcon ; Schirmer, M.
Fecha de publicación: 11/2015
Editorial: IOP Publishing
Revista: Astronomical Journal
ISSN: 0004-6256
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Astronomía

Resumen

NGC 253 is the nearest spiral galaxy with a nuclear starburst that becomes the best candidate for studying the relationship between starburst and active galactic nucleus activity. However, this central region is veiled by large amounts of dust, and it has been so far unclear which is the true dynamical nucleus to the point that there is no strong evidence that the galaxy harbors a supermassive black hole co-evolving with the starburst as was supposed earlier. Near-infrared (NIR) spectroscopy, especially NIR emission line analysis, could be advantageous in shedding light on the true nucleus identity. Using Flamingos-2 at Gemini South we have taken deep K-band spectra along the major axis of the central structure and through the brightest infrared source. In this work, we present evidence showing that the brightest NIR and mid-infrared source in the central region, already known as radio source TH7 and so far considered just a large stellar supercluster, in fact presents various symptoms of a genuine galactic nucleus. Therefore, it should be considered a valid nucleus candidate. Mentioning some distinctive aspects, it is the most massive compact infrared object in the central region, located at 2.″0 of the symmetry center of the galactic bar, as measured in the K-band emission. Moreover, our data indicate that this object is surrounded by a large circumnuclear stellar disk and it is also located at the rotation center of the large molecular gas disk of NGC 253. Furthermore, a kinematic residual appears in the H2 rotation curve with a sinusoidal shape consistent with an outflow centered in the candidate nucleus position. The maximum outflow velocity is located about 14 pc from TH7, which is consistent with the radius of a shell detected around the nucleus candidate, observed at 18.3 μm (Qa) and 12.8 μm ([Ne ii]) with T-ReCS. Also, the Brγ emission line profile shows a pronounced blueshift and this emission line also has the highest equivalent width at this position. All this evidence points to TH7 as the best candidate for the galactic nucleus of NGC 253.
Palabras clave: Galaxies: Individual (Ngc 253) , Galaxies: Kinematics And Dynamics , Galaxies: Nuclei , Galaxies: Structure , Infrared: Galaxies
Ver el registro completo
 
Archivos asociados
Thumbnail
 
Tamaño: 12.43Mb
Formato: PDF
.
Descargar
Licencia
info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/69778
DOI: http://dx.doi.org/10.1088/0004-6256/150/5/139
URL: https://iopscience.iop.org/article/10.1088/0004-6256/150/5/139/meta
URL: https://arxiv.org/abs/1509.00330
Colecciones
Articulos(CCT - CORDOBA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Articulos(IALP)
Articulos de INST.DE ASTROFISICA LA PLATA
Articulos(ICATE)
Articulos de INST.D/CS ASTRONOMICAS D/LA TIERRA Y DEL ESPACIO
Citación
Gunthardt, Guillermo Ivan; Agüero, Maria Paz; Camperi, Javier Antonio; Diaz, Ruben Joaquin; Gomez, P. L.; et al.; Uncovering the nucleus candidate for NGC 253; IOP Publishing; Astronomical Journal; 150; 5; 11-2015; 1-18; 139
Compartir
Altmétricas
 

Items relacionados

Mostrando titulos relacionados por título, autor y tema.

  • Artículo New quantitative nitrogen abundance estimations in a sample of Seyfert 2 active galactic nuclei
    Dors Jr., O. L.; Arellano Córdova, K. Z.; Cardaci, Monica Viviana ; Hägele, Guillermo Federico (Wiley Blackwell Publishing, Inc, 2017-06)
  • Artículo Nature and chemical abundances of a sample of Lyman-α emitter objects at high redshift
    Dors, Oli L.; Agarwal, B.; Hägele, Guillermo Federico ; Cardaci, Monica Viviana ; Rydberg, Claes Erik; Riffel, R. A.; Oliveira, A. S.; Krabbe, A. C. (Wiley Blackwell Publishing, Inc, 2018-09)
  • Artículo Chemical abundances of Seyfert 2 AGNs, II: N2 metallicity calibration based on SDSS
    Carvalho, S.P.; Dors, O. L.; Cardaci, Monica Viviana ; Hägele, Guillermo Federico ; Krabbe, Nora Cristina; Pérez Montero, E.; Monteiro, A.F.; Armah, M.; Freitas Lemes, P. (Wiley Blackwell Publishing, Inc, 2020-06)
Enviar por e-mail
Separar cada destinatario (hasta 5) con punto y coma.
  • Facebook
  • X Conicet Digital
  • Instagram
  • YouTube
  • Sound Cloud
  • LinkedIn

Los contenidos del CONICET están licenciados bajo Creative Commons Reconocimiento 2.5 Argentina License

https://www.conicet.gov.ar/ - CONICET

Inicio

Explorar

  • Autores
  • Disciplinas
  • Comunidades

Estadísticas

Novedades

  • Noticias
  • Boletines

Ayuda

Acerca de

  • CONICET Digital
  • Equipo
  • Red Federal

Contacto

Godoy Cruz 2290 (C1425FQB) CABA – República Argentina – Tel: +5411 4899-5400 repositorio@conicet.gov.ar
TÉRMINOS Y CONDICIONES