Issue |
A&A
Volume 677, September 2023
|
|
---|---|---|
Article Number | A100 | |
Number of page(s) | 8 | |
Section | Catalogs and data | |
DOI | https://doi.org/10.1051/0004-6361/202347140 | |
Published online | 12 September 2023 |
Deriving physical parameters of unresolved star clusters
VII. Adaptive aperture photometry of the M 31 PHAT star clusters★
Center for Physical Sciences and Technology,
Saulėtekio av. 3,
10257
Vilnius,
Lithuania
e-mail: rima.stonkute@ftmc.lt; vladas.vansevicius@ftmc.lt
Received:
9
June
2023
Accepted:
20
July
2023
Context. This work is the seventh study in a series dedicated to investigating degeneracies of simultaneous age, mass, extinction, and metallicity determinations of partially resolved or unresolved star clusters with Hubble Space Telescope broadband aperture photometry. In the sixth work (hereafter, Paper I), it was demonstrated that the adaptive aperture photometry, performed to avoid the majority of the projected foreground and background stars falling within the apertures, gives more consistent colour indices for star clusters.
Aims. In this study, we aim to supplement the homogeneous multi-colour aperture photometry results published in Paper I and provide a complete M 31 Panchromatic Hubble Andromeda Treasury (PHAT) survey star cluster photometry catalogue for further analysis.
Methods. Following Paper I, we used a two-aperture approach for photometry. The first aperture is the standard one used to measure total cluster fluxes. The second (smaller) aperture is introduced to avoid the bright foreground and background stars projecting onto the clusters. We selected the radii of smaller apertures to be larger than the half-light radii of the clusters.
Results. We present the second part of the star cluster aperture photometry catalogues for a sample of 1477 star clusters from the M 31 PHAT survey not covered in Paper I. Compared to the M 31 PHAT star cluster aperture photometry catalogue published by Johnson et al., adjustments were made to the cluster centre coordinates, aperture sizes, and sky background levels.
Key words: galaxies: star clusters: general / galaxies: star clusters: individual: M 31
Full Tables 1 and 2 are available at the CDS via anonymous ftp to cdsarc.cds.unistra.fr (130.79.128.5) or via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/677/A100
© The Authors 2023
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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