J/A+A/664/A129 J-PLUS. Globular clusters candidates (de Brito Silva+, 2022)
J-PLUS: Detecting and studying extragalactic globular clusters.
The case of NGC 1023.
de Brito Silva D., Coelho P., Cortesi A., Bruzual G., Magris C.G.,
Chies-Santos A.L., Hernandez-Jimenez J.A., Ederoclite A., San Roman I.,
Varela J., Forbes D.A., Jimenez-Teja Y., Cenarro J., Cristobal-Hornillos D.,
Hernandez-Monteagudo C., Lopez-Sanjuan C., Marin-Franch A., Moles M.,
Vazquez Ramio H., Dupke R., Sodre L. Jr., Angulo R.E.
<Astron. Astrophys. 664, A129 (2022)>
=2022A&A...664A.129D 2022A&A...664A.129D (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, globular ; Galaxies, nearby ; Photometry ; Optical ;
Surveys
Keywords: galaxies: star clusters: general - galaxies: individual: NGC1023 -
surveys
Abstract:
Extragalactic globular clusters (GCs) are key objects for studying the
history of galaxies. The arrival of wide-field surveys such as the
Javalambre Photometric Local Universe Survey (J-PLUS) offers new
possibilities for the study of these systems.
We perform the first study of GCs in J-PLUS to recover information
about the history of NGC 1023 taking advantage of wide-field images
and 12 filters. Methods. We develop the semiautomatic pipeline
GCFinder that detects GC candidates in J-PLUS images and can also be
adapted to similar surveys. We study the stellar population properties
of a sub-sample of GC candidates using spectral energy distribution
(SED) fitting.
We find 523 GC candidates in NGC 1023, of which ∼300 are new. We
identify subpopulations of GC candidates, where age and metallicity
distributions have multiple peaks. By comparing our results with
simulations, we report a possible broad age- metallicity relation,
evidence that NGC 1023 experienced accretion events in the past. The
dominating age peak is at 1010 yr. We report a correlation between
masses and ages that suggests that massive GC candidates are more
likely to survive the turbulent history of the host galaxy. Modeling
the light of NGC 1023, we find two spiral-like arms and detect a
displacement of the galaxies photometric center with respect to the
outer isophotes and center of GC distribution (∼700 pc and ∼1600 pc,
respectively), which could be the result of ongoing interaction
between NGC 1023 and NGC 1023A.
By studying the GC system of NGC 1023 with J-PLUS we showcase the
power of multi-band surveys for this kind of study and find evidence
of a complex accretion history of the host galaxy.
Description:
In J-PLUS: Detecting and studying extragalactic globular clusters -
the case of NGC 1023 we study the globular cluster system of NGC 1023
using J-PLUS filters.
Here we present positions and magnitudes of the 523 globular cluster
candidates obtained with the pipeline GCFinder.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
gcs.dat 201 523 Globular clusters candidates
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Byte-by-byte Description of file: gcs.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- ID [17/3286] ID from GCFinder pipeline
6- 15 F10.7 deg RAdeg Right Ascension (J2000) from J-PLUS
17- 26 F10.7 deg DEdeg Declination (J2000) from J-PLUS
28- 34 F7.4 mag umag ?=99 u apparent magnitude
36- 42 F7.4 mag e_umag ?=99 rms uncertainty of u apparent magnitude
44- 50 F7.4 mag J0378mag ?=99 J0378 apparent magnitude
52- 58 F7.4 mag e_J0378mag ?=99 rms uncertainty of J0378 apparent magnitude
60- 66 F7.4 mag J0410mag ?=99 J0410 apparent magnitude
68- 74 F7.4 mag e_J0410mag ?=99 rms uncertainty of J0410 apparent magnitude
76- 82 F7.4 mag J0430mag ?=99 J0430 apparent magnitude
84- 91 F8.4 mag e_J0430mag ?=99 rms uncertainty of J0430 apparent magnitude
93- 99 F7.4 mag gmag g apparent magnitude
101-106 F6.4 mag e_gmag rms uncertainty of g apparent magnitude
108-114 F7.4 mag J0515mag ?=99 J0515 apparent magnitude
116-123 F8.4 mag e_J0515mag ?=99 rms uncertainty of J0515 apparent magnitude
125-131 F7.4 mag rmag r apparent magnitude
133-138 F6.4 mag e_rmag rms uncertainty of r apparent magnitude
140-146 F7.4 mag J0660mag ?=99 J0660 apparent magnitude
148-154 F7.4 mag e_J0660mag ?=99 rms uncertainty of J0660 apparent magnitude
156-162 F7.4 mag imag i apparent magnitude
164-169 F6.4 mag e_imag rms uncertainty of i apparent magnitude
171-177 F7.4 mag J0861mag ?=99 J0861 apparent magnitude
179-185 F7.4 mag e_J0861mag ?=99 rms uncertainty of J0861 apparent magnitude
187-193 F7.4 mag zmag ?=99 z apparent magnitude
195-201 F7.4 mag e_zmag ?=99 rms uncertainty of z apparent magnitude
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Acknowledgements:
Danielle de Brito Silva, danielle.debrito(at)mail.udp.cl
(End) Patricia Vannier [CDS] 16-May-2022