Table · dataset · 2023
Globular clusters in PGC 087327
Listed in IVOA Registry (Virtual Observatory)
Description
We take advantage of exquisitely deep optical imaging data from the Hubble Space Telescope's Advanced Camera for Surveys (HST/ACS) in the F475W (g_F475W_) and F606W (V_F606W_) bands to study the properties of the globular cluster (GC) population in the intermediate-mass lenticular galaxy PGC 087327 in the Hydra I galaxy cluster. We inspected the photometric (magnitudes and colour) and morphometric (compactness, elongation, etc.) properties of sources lying in an area of ~19x19kpc centred on PGC 087327 and compared them with four neighbouring fields over the same HST/ACS mosaic.
This allowed us to identify a list of GC candidates and to inspect their properties using a background decontamination method. Relative to four comparison fields, PGC 087327 shows a robust overdensity of GCs, N_GC_=82+/-9. At the estimated magnitude of the galaxy, this number implies a specific frequency of S_N_=1.8+/-0.7.
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In spite of the short wavelength interval available with the g_F475W_ and V_F606W_ passbands, the colour distribution shows a clear bimodality with a blue peak at <g_F475W_-V_F606W_>=0.47+/-0.05mag and a red peak at <g_F475W_-V_F606W_>=0.62+/-0.03mag. We also observe the typical steeper slope of the radial distribution of red GCs relative to blue ones. Thanks to the unique depth of the available data, we characterise the GC luminosity function (GCLF) well beyond the expected GCLF turnover.
We find g^TOM^_F475W_=26.54+/-0.10mag and V^TOM^_F606W_=26.08+/-0.09mag, which after calibration yields a distance of D_GCLF_=56.7+/-4.3(statistical)+/-5.2(systematic)Mpc.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/666/A99 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2022A&A...666A..99H ui.adsabs.harvard.edu/abs/2022A%26A...666A..99H ↗
publication · from IVOA Registry
Catalogue records · 2
- VOResource record dc.g-vo.org/oai.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3… ↗
metadata API · from IVOA Registry
- Registry record (GAVO) dc.g-vo.org/I/cds.vizier/j/a%2Ba/666/a99 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 72% · Imaging 75%
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/666/a99 | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:group:5101 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (72%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:optical | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].local:modality:imaging | enrichment · IVOA Registry | keyword-concept-rules@1.0.0 | title+description (75%) |
| description | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_description |
| license_text | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| publication_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| title | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_title |
| updated_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 |