Deriving physical parameters of unresolved star clusters: VI. Adaptive aperture photometry of the M31 PHAT star clusters

被引：0

作者：

机构：

[1] Naujalis, Rokas

[2] 1,Stonkutė, Rima

[3] 1,Vansevičius, Vladas

来源：

Stonkutė, Rima (rima.stonkute@ftmc.lt) | 1600年 / EDP Sciences卷 / 654期

关键词：

Context. This study is the sixth of a series that investigates degeneracy and stochasticity problems present in the determination of the age; mass; extinction; and metallicity of partially resolved or unresolved star clusters in external galaxies when using Hubble Space Telescope broadband photometry. In the fifth publication; it was noticed that inconsistencies in cluster colour indices; which arise due to projected foreground and background stars on the apertures; enhance age-metallicity-extinction degeneracies. Aims. In this work we aim to present new aperture photometry results for a sample of star clusters from the M 31 Panchromatic Hubble Andromeda Treasury (PHAT) survey. Methods. We employed two methods of aperture photometry. The first method is ordinary aperture photometry to measure total cluster fluxes. The second method was introduced to avoid the brightest foreground and background stars that project onto large apertures. This method employs smaller apertures; adapted to cover a central part of clusters; and applies an aperture correction; derived for the F475W passband; to other passbands. We note that this procedure is valid only for clusters without prominent systematic gradients of colour indices beyond half-light radii. Results. We present two catalogues of star cluster aperture photometry (produced by applying ordinary aperture photometry and adaptive aperture photometry methods) with estimated uncertainties for a sample of 1181 star clusters from the M 31 PHAT survey. Compared to the M 31 PHAT fundamental star cluster aperture photometry catalogue published by Johnson et al; there are changes made in the following: cluster centre coordinates; aperture sizes; and sky background estimates. © ESO 2021;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Journal article (JA)

引用

共 50 条

[1] Deriving physical parameters of unresolved star clusters VII. Adaptive aperture photometry of the M 31 PHAT star clusters
Krisciunas, Eimantas
Daugevicius, Karolis
Stonkute, Rima
Vansevicius, Vladas
ASTRONOMY & ASTROPHYSICS, 2023, 677
[2] Deriving physical parameters of unresolved star clusters V. M31 PHAT star clusters
de Meulenaer, P.
Stonkute, R.
Vansevicius, V.
ASTRONOMY & ASTROPHYSICS, 2017, 602
[3] Deriving physical parameters of unresolved star clusters II. Application to M 31 PHAT clusters
de Meulenaer, P.
Narbutis, D.
Mineikis, T.
Vansevicius, V.
ASTRONOMY & ASTROPHYSICS, 2015, 574
[4] Deriving physical parameters of unresolved star clusters VIII. Limits of aperture photometry for star cluster studies
Daugevičius, Karolis
Kriščiūnas, Eimantas
Cicenas, Erikas
Stonkute, Rima
Vansevičius, Vladas
Astronomy and Astrophysics, 2024, 688
[5] Deriving physical parameters of unresolved star clusters
Daugevicius, Karolis
Krisciunas, Eimantas
Cicenas, Erikas
Stonkute, Rima
Vansevicius, Vladas
ASTRONOMY & ASTROPHYSICS, 2024, 688
[6] Deriving physical parameters of unresolved star clusters
Naujalis, Rokas
Stonkute, Rima
Vansevicius, Vladas
ASTRONOMY & ASTROPHYSICS, 2021, 654
[7] Deriving physical parameters of unresolved star clusters IV. The M33 star cluster system
de Meulenaer, P.
Narbutis, D.
Mineikis, T.
Vansevicius, V.
ASTRONOMY & ASTROPHYSICS, 2015, 581
[8] PHOTOELECTRIC PHOTOMETRY OF STAR-CLUSTERS IN M31 .10.
SHAROV, AS
LYUTYI, VM
ESIPOV, VF
SOVIET ASTRONOMY LETTERS, 1984, 10 (04): : 243 - 243
[9] PHOTOELECTRIC PHOTOMETRY OF STAR-CLUSTERS IN M31 .11.
SHAROV, AS
LYUTYI, VM
SOVIET ASTRONOMY LETTERS, 1985, 11 (04): : 248 - 249
[10] STAR CLUSTERS IN M31: OLD CLUSTERS WITH BAR KINEMATICS
Morrison, Heather
Caldwell, Nelson
Schiavon, Ricardo P.
Athanassoula, E.
Romanowsky, Aaron J.
Harding, Paul
ASTROPHYSICAL JOURNAL LETTERS, 2011, 726 (01)

← 1 2 3 4 5 →