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The HST Large Programme on NGC 6752 - V. Differences in luminosity and mass function among stellar populations

Scalco, M, Gerasimov, R, Bedin, LR, Vesperini, E, Nardiello, D, Salaris, M, Burgasser, A, Anderson, J, Libralato, M, Bellini, A and Rosati, P (2024) The HST Large Programme on NGC 6752 - V. Differences in luminosity and mass function among stellar populations. Astronomische Nachrichten. ISSN 0004-6337

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The HST large programme on NGC6752-V - differences in luminosity and mass functions among multiple stellar populations.pdf - Accepted Version
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Open Access URL: https://arxiv.org/pdf/2403.03262.pdf (Accepted version)


We exploit the astro-photometric dataset of the multi-epoch infrared parallel field of a Hubble Space Telescope Large Programme aimed at studying the faintest stars of the globular cluster NGC 6752 to determine the luminosity and mass functions of the multiple stellar populations of this cluster. Thanks to the measurement of proper motions and deeper completeness, the results presented in this paper represent a significant improvement over those of previous studies. We successfully derived membership probabilities reaching stars as faint as (Formula presented.), allowing us to reliably distinguish the three main stellar populations detected within this cluster. We employed a new set of model isochrones that have been individually fit to the colour–magnitude diagram of each population. We present a comprehensive analysis of the luminosity and mass functions for three stellar populations within NGC 6752. Notably, our findings reveal differences in the present-day luminosity and mass functions of first-generation and second-generation stars; these differences are consistent with the manifestation of the effects of dynamical processes acting on populations with different initial spatial distributions. Finally, we publicly release the catalogues with positions, photometry, proper motions and memberships probabilities, as well as the stacked-image atlases and all newly calculated stellar models.

Item Type: Article
Additional Information: This is the pre-peer reviewed version of the following article: Scalco, M., Gerasimov, R., Bedin, L. R., et al. 2024, Astron. Nachr., e20240018. , which has been published in final form at https://doi.org/10.1002/asna.20240018. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions
Uncontrolled Keywords: 0201 Astronomical and Space Sciences; Astronomy & Astrophysics
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: Wiley
SWORD Depositor: A Symplectic
Date Deposited: 16 Apr 2024 09:24
Last Modified: 16 Apr 2024 09:30
DOI or ID number: 10.1002/asna.20240018
URI: https://researchonline.ljmu.ac.uk/id/eprint/23029
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