DO Cook
Star cluster catalogues for the LEGUS dwarf galaxies
Cook, DO; Lee, JC; Adamo, A; Kim, H; Chandar, R; Whitmore, BC; Mok, A; Ryon, JE; Dale, DA; Calzetti, D; Andrews, JE; Aloisi, A; Ashworth, G; Bright, SN; Brown, TM; Christian, C; Cignoni, M; Clayton, GC; da Silva, R; de Mink, SE; Dobbs, CL; Elmegreen, BG; Elmegreen, DM; Evans, AS; Fumagalli, M; Gallagher, JS; Gouliermis, DA; Grasha, K; Grebel, EK; Herrero, A; Hunter, DA; Jensen, EI; Johnson, KE; Kahre, L; Kennicutt, RC; Krumholz, MR; Lee, NJ; Lennon, D; Linden, S; Martin, C; Messa, M; Nair, P; Nota, A; Östlin, G; Parziale, RC; Pellerin, A; Regan, MW; Sabbi, E; Sacchi, E; Schaerer, D; Schiminovich, D; Shabani, F; Slane, FA; Small, J; Smith, CL; Smith, LJ; Taibi, S; Thilker, DA; de la Torre, IC; Tosi, M; Turner, JA; Ubeda, L; Van Dyk, SD; Walterbos, R AM; Wofford, A
Authors
JC Lee
A Adamo
H Kim
R Chandar
BC Whitmore
A Mok
JE Ryon
DA Dale
D Calzetti
JE Andrews
A Aloisi
G Ashworth
SN Bright
TM Brown
C Christian
M Cignoni
GC Clayton
R da Silva
SE de Mink
CL Dobbs
BG Elmegreen
DM Elmegreen
AS Evans
Professor Michele Fumagalli michele.fumagalli@durham.ac.uk
Academic Visitor
JS Gallagher
DA Gouliermis
K Grasha
EK Grebel
A Herrero
DA Hunter
EI Jensen
KE Johnson
L Kahre
RC Kennicutt
MR Krumholz
NJ Lee
D Lennon
S Linden
C Martin
M Messa
P Nair
A Nota
G Östlin
RC Parziale
A Pellerin
MW Regan
E Sabbi
E Sacchi
D Schaerer
D Schiminovich
F Shabani
FA Slane
J Small
CL Smith
LJ Smith
S Taibi
DA Thilker
IC de la Torre
M Tosi
JA Turner
L Ubeda
SD Van Dyk
R AM Walterbos
A Wofford
Abstract
We present the star cluster catalogues for 17 dwarf and irregular galaxies in the HST Treasury Program ‘Legacy ExtraGalactic UV Survey’ (LEGUS). Cluster identification and photometry in this sub-sample are similar to that of the entire LEGUS sample, but special methods were developed to provide robust catalogues with accurate fluxes due to low cluster statistics. The colours and ages are largely consistent for two widely used aperture corrections, but a significant fraction of the clusters are more compact than the average training cluster. However, the ensemble luminosity, mass, and age distributions are consistent suggesting that the systematics between the two methods are less than the random errors. When compared with the clusters from previous dwarf galaxy samples, we find that the LEGUS catalogues are more complete and provide more accurate total fluxes. Combining all clusters into a composite dwarf galaxy, we find that the luminosity and mass functions can be described by a power law with the canonical index of −2 independent of age and global SFR binning. The age distribution declines as a power law, with an index of ≈− 0.80 ± 0.15, independent of cluster mass and global SFR binning. This decline of clusters is dominated by cluster disruption since the combined star formation histories and integrated-light SFRs are both approximately constant over the last few hundred Myr. Finally, we find little evidence for an upper-mass cut-off (<2σ) in the composite cluster mass function, and can rule out a truncation mass below ≈104.5M⊙ but cannot rule out the existence of a truncation at higher masses.
Citation
Cook, D., Lee, J., Adamo, A., Kim, H., Chandar, R., Whitmore, B., …Wofford, A. (2019). Star cluster catalogues for the LEGUS dwarf galaxies. Monthly Notices of the Royal Astronomical Society, 484(4), 4897-4919. https://doi.org/10.1093/mnras/stz331
Journal Article Type | Article |
---|---|
Acceptance Date | Jan 25, 2019 |
Online Publication Date | Feb 1, 2019 |
Publication Date | Apr 21, 2019 |
Deposit Date | Mar 14, 2019 |
Publicly Available Date | Mar 29, 2024 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 484 |
Issue | 4 |
Pages | 4897-4919 |
DOI | https://doi.org/10.1093/mnras/stz331 |
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Copyright Statement
© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.
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