J/MNRAS/515/4191 S-PLUS. multiple stellar population in GCs (Hartmann+, 2022)
S-PLUS: exploring wide field properties of multiple populations in galactic
globular clusters at different metallicities.
Hartmann E.A., Bonatto C.J., Chies-Santos A.L., Alonso-Garcia J.,
Bastian N., Overzier R., Schoenell W., Coelho P.R.T., Branco V., Kanaan A.,
Mendes de Oliveira C., Ribeiro T.
<Mon. Not. R. Astron. Soc. 515, 4191-4200 (2022)>
=2022MNRAS.515.4191H 2022MNRAS.515.4191H (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, globular ; Photometry, SDSS
Keywords: surveys - globular clusters: individual: (NGC 104) (NGC 288)
(NGC 3201) (NGC 7089)
Abstract:
Multiple Stellar Populations (MSPs) are a ubiquitous phenomenon in
Galactic Globular Clusters (GCs). By probing different spectral ranges
affected by different absorption lines using the multi-band
photometric survey S-PLUS, we study four GCs - NGC104, NGC288,
NGC3201 and NGC7089 - that span a wide range of metallicities. With
the combination of broad and narrow-band photometry in 12 different
filters from 3485A (u) to 9114A (z), we identified MSPs along the
rectified red-giant branch in colour-magnitude diagrams (CMDs) and
separated them using a K-means clustering algorithm. Additionally, we
take advantage of the large Field of View of the S-PLUS detector to
investigate radial trends in our sample. We report on six colour
combinations that can be used to successfully identify two stellar
populations in all studied clusters and show that they can be
characterised as Na-rich and Na-poor. For both NGC 288 and NGC 7089,
their radial profiles show a clear concentration of 2P population.
This directly supports the formation theories that propose an
enrichment of the intra-cluster medium and subsequent star formation
in the more dense central regions. However, in the case of NGC 3201,
the trend is reversed. The 1P is more centrally concentrated, in
direct contradiction with previous literature studies. NGC 104 shows a
well-mixed population. We also constructed radial profiles up to 1
half-light radius of the clusters with HST data to highlight that
radial differences are lost in the inner regions of the GCs and that
wide-field studies are essential when studying this.
Description:
The four tables contain RA,Dec and magnitudes (with errors) of all objects
with magnitude measured in all the 12 bands of S-PLUS. The photometry was
performed using the DAOPHOT package available in IRAF. The process of
calibration is described in the accompanying paper.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
ngc104.dat 183 11561 NGC 104 photometric catalog
ngc288.dat 183 2923 NGC 288 photometric catalog
ngc3201.dat 183 27405 NGC 3201 photometric catalog
ngc7089.dat 183 9290 NGC 7089 photometric catalog
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Byte-by-byte Description of file: ngc104.dat ngc288.dat ngc3201.dat ngc7089.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right Ascension (J2000)
4- 5 I2 min RAm Right Ascension (J2000)
7- 13 F7.4 s RAs Right Ascension (J2000)
15 A1 --- DE- Declination sign (J2000)
16- 17 I2 deg DEd Declination (J2000)
19- 20 I2 arcmin DEm Declination (J2000)
22- 27 F6.3 arcsec DEs Declination (J2000)
29- 34 F6.3 mag umag u magnitude
36- 40 F5.3 mag e_umag Error in u magnitude
42- 47 F6.3 mag J0378mag J0378 magnitude
49- 53 F5.3 mag e_J0378mag Error in J0378 magnitude
55- 60 F6.3 mag J0395mag J0395 magnitude
62- 66 F5.3 mag e_J0395mag Error in J0395 magnitude
68- 73 F6.3 mag J0410mag J0410 magnitude
75- 79 F5.3 mag e_J0410mag Error in J0410 magnitude
81- 86 F6.3 mag J0430mag J0430 magnitude
88- 92 F5.3 mag e_J0430mag Error in J0430 magnitude
94- 99 F6.3 mag gmag g magnitude
101-105 F5.3 mag e_gmag Error in g magnitude
107-112 F6.3 mag J0515mag J0515 magnitude
114-118 F5.3 mag e_J0515mag Error in J0515 magnitude
120-125 F6.3 mag rmag r magnitude
127-131 F5.3 mag e_rmag Error in r magnitude
133-138 F6.3 mag J0660mag J0660 magnitude
140-144 F5.3 mag e_J0660mag Error in J0660 magnitude
146-151 F6.3 mag imag i magnitude
153-157 F5.3 mag e_imag Error in i magnitude
159-164 F6.3 mag J0861mag J0861 magnitude
166-170 F5.3 mag e_J0861mag Error in J0861 magnitude
172-177 F6.3 mag zmag z magnitude
179-183 F5.3 mag e_zmag Error in z magnitude
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History:
Eduardo Hartmann, 00276105(at)ufrgs.br
Acknowledgements:
The S-PLUS project, including the T80-South robotic telescope and the
S-PLUS scientific survey, was founded as a partnership between the
Fundacao de Amparoa Pesquisa do Estado de Sao Paulo (FAPESP), the
Observatorio Nacional (ON), the Federal University of Sergipe (UFS),
and the Federal University of Santa Catarina (UFSC), with important
financial and practical contributions from other collaborating
institutes in Brazil, Chile (Universidad de La Serena), and Spain
(Centro de Estudios de Fisica del Cosmos de Aragon, CEFCA). We further
acknowledge financial support from the Sao Paulo Research Foundation
(FAPESP), the Brazilian National Research Council (CNPq), the
Coordination for the Improvement of Higher Education Personnel
(CAPES), the Carlos Chagas Filho Rio de Janeiro State Research
Foundation (FAPERJ), and the Brazilian Innovation Agency (FINEP).
The members of the S-PLUS collaboration are grateful for the
contributions from CTIO staff in helping in the construction,
commissioning and maintenance of the T80-South telescope and camera.
We are also indebted to Rene Laporte, INPE, and Keith Taylor for their
important contributions to the project. From CEFCA, we thank Antonio
Marin-Franch for his invaluable contributions in the early phases of
the project, David Cristobal-Hornillos and his team for their help
with the installation of the data reduction package jype version
0.9.9, Cesar Iniguez for providing 2D measurements of the filter
transmissions, and all other staff members for their support with
various aspects of the project.
(End) Patricia Vannier [CDS] 16-May-2022