Hostname: page-component-7dd5485656-frp75 Total loading time: 0 Render date: 2025-11-01T02:13:42.164Z Has data issue: false hasContentIssue false
  • English
  • Français

The metallicity gradients of red giant branch stars in the Small Magellanic Cloud

Published online by Cambridge University Press:  30 October 2025

Mahdieh Navabi Open the ORCID record for Mahdieh Navabi [Opens in a new window] ,
Noelia E. D. Noël ,
Ricardo Carrera  and
Michele De Leo
Mahdieh Navabi*
Affiliation:
Department of Physics, University of Surrey, Guildford, GU2 7XH, UK
Noelia E. D. Noël
Affiliation:
Department of Physics, University of Surrey, Guildford, GU2 7XH, UK
Ricardo Carrera
Affiliation:
INAF-Osservatorio di Astrofisica e Scienza dello Spazio, via P. Gobetti 93/3, 40129, Bologna, Italy INAF-Osservatorio Astronomico di Padova, vicolo Osservatorio 5, 35122, Padova, Italy
Michele De Leo
Affiliation:
Department of Physics, University of Surrey, Guildford, GU2 7XH, UK Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436, Macul, Santiago, Chile Instituto Milenio de Astrofísica, Av. Vicuña Mackenna 4860, 7820436, Macul, Santiago, Chile
*
email: m.navabi@surrey.ac.uk
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The Small Magellanic Cloud (SMC), as one of the nearest galaxies to us, provides a superb laboratory for studying resolved stars in exquisite detail. We present here the largest sample of SMC Red Giant Branch (RGB) stars (∼6000) observed with the AAOmega spectrograph fed by the Two Degree Field (2dF) multi-object system at the Anglo-Australian Telescope of the Siding Spring Observatory (Australia). Metallicities were recovered using a direct estimation of [Fe/H] from the equivalent widths of the Calcium triplet (CaT). We discuss the potential implications of the metallicity gradients and compare them with previous determinations of star formation history to assess the consequences of encounters between the SMC and the Large Magellanic Cloud.

Keywords

SMCMagellanic Cloudsdwarf-galaxiesCalcium triplet (CaT)

Information

Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 19 , Symposium S379: Dynamical Masses of Local Group Galaxies , December 2023 , pp. 231 - 235
Check for updates
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of International Astronomical Union

References

Carrera, R., Gallart, C., Aparicio, A., Costa, E., Méndez, R.A., and Noël, N.E.D. 2008, AJ, 136, 1039 CrossRefGoogle Scholar
Carrera, R., Gallart, C., Aparicio, A., Costa, E., Hardy, E., Méndez, R.A., and, …: 2009, AJ, 256, 275 CrossRefGoogle Scholar
Carrera, R., Pancino, E., Gallart, C., et al. 2013, MNRAS, 434, 1681 CrossRefGoogle Scholar
Choudhury, S., Subramaniam, A., Cole, A. A., et al. 2018, MNRAS, 475, 4279 CrossRefGoogle Scholar
Cole, A. A., Smecker-Hane, T. A., Tolstoy, E., et al. 2004, MNRAS, 347, 367 CrossRefGoogle Scholar
De Leo, M., Carrera, R., Noël, N. E. D., et al. 2020, MNRAS, 495, 98 CrossRefGoogle Scholar
Dobbie, P. D., Cole, A. A., Subramaniam, A., et al. 2014, MNRAS, 442, 1680 CrossRefGoogle Scholar
Noël, N. E. D., Greggio, L., Renzini, A., et al. 2013, ApJ, 772, 58 CrossRefGoogle Scholar
Noël, N. E. D., Conn, B. C., Read, J. I., et al. 2015, MNRAS, 452, 4222 CrossRefGoogle Scholar
Parisi, M. C., Geisler, D., Grocholski, A. J., Clariá, J. J., Sarajedini, A., 2010, AJ, 139, 1168 CrossRefGoogle Scholar
Saunders, W., Bridges, T., Gillingham, P., et al. 2004, SPIE, 5492, 389 CrossRefGoogle Scholar
Scowcroft, V., Freedman, W. L., Madore, B. F., et al. 2016, ApJ, 816, 49 CrossRefGoogle Scholar
Skrutskie, M. F., Cutri, R. M., Stiening, R., et al. 2006, AJ, 131, 1163 CrossRefGoogle Scholar
Starkenburg, E., Hill, V., Tolstoy, E., et al. 2010, A&A, 513, A34 CrossRefGoogle Scholar