Skip navigation
  • INAF logo
  • Home
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects
  • Explore by
    • Research outputs
    • Researchers
    • Organization units
    • Projects
  • Login:
    • My DSpace
    • Receive email
      updates
    • Edit Account details
  • Italian
  • English

  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/26192
Title: Abundance ratios and IMF slopes in the dwarf elliptical galaxy NGC 1396 with MUSE
Authors: Mentz, J. J.
LA BARBERA, Francesco 
Peletier, R. F.
Falcón-Barroso, J.
Lisker, T.
van de Ven, G.
Loubser, S. I.
Hilker, M.
Sánchez-Janssen, R.
NAPOLITANO, NICOLA ROSARIO 
CANTIELLO, Michele 
Capaccioli, M.
Norris, M.
Paolillo, Maurizio 
Smith, R.
Beasley, M. A.
Lyubenova, M.
Munoz, R.
Puzia, T.
Issue Date: 2016
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 463
Issue: 3
First Page: 2819
Abstract: Deep observations of the dwarf elliptical (dE) galaxy NGC 1396 (M<SUB>V</SUB> = -16.60, Mass ∼4 × 10<SUP>8</SUP> M<SUB>☉</SUB>), located in the Fornax cluster, have been performed with the Very Large Telescope/Multi Unit Spectroscopic Explorer spectrograph in the wavelength region from 4750 to 9350 Å. In this paper, we present a stellar population analysis studying chemical abundances, the star formation history (SFH) and the stellar initial mass function (IMF) as a function of galactocentric distance. Different, independent ways to analyse the stellar populations result in a luminosity-weighted age of ∼6 Gyr and a metallicity [Fe/H]∼ -0.4, similar to other dEs of similar mass. We find unusually overabundant values of [Ca/Fe] ∼+ 0.1, and underabundant Sodium, with [Na/Fe] values around -0.1, while [Mg/Fe] is overabundant at all radii, increasing from ∼+ 0.1 in the centre to ∼+ 0.2 dex. We notice a significant metallicity and age gradient within this dwarf galaxy. To constrain the stellar IMF of NGC 1396, we find that the IMF of NGC 1396 is consistent with either a Kroupa-like or a top-heavy distribution, while a bottom-heavy IMF is firmly ruled out. An analysis of the abundance ratios, and a comparison with galaxies in the Local Group, shows that the chemical enrichment history of NGC 1396 is similar to the Galactic disc, with an extended SFH. This would be the case if the galaxy originated from a Large Magellanic Cloud-sized dwarf galaxy progenitor, which would lose its gas while falling into the Fornax cluster.
URI: http://hdl.handle.net/20.500.12386/26192
URL: https://academic.oup.com/mnras/article/463/3/2819/2646563
ISSN: 0035-8711
DOI: 10.1093/mnras/stw2129
Bibcode ADS: 2016MNRAS.463.2819M
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

Files in This Item:
File Description SizeFormat
stw2129.pdfPdf editoriale5.99 MBAdobe PDFView/Open
Show full item record

Page view(s)

60
checked on Feb 4, 2023

Download(s)

22
checked on Feb 4, 2023

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are published in Open Access, unless otherwise indicated.


Explore by
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects

Informazioni e guide per autori

https://openaccess-info.inaf.it: tutte le informazioni sull'accesso aperto in INAF

Come si inserisce un prodotto: le guide a OA@INAF

La Policy INAF sull'accesso aperto

Documenti e modelli scaricabili

Feedback
Built with DSpace-CRIS - Extension maintained and optimized by Logo 4SCIENCE