Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/26227
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Dalessandro, Emanuele | en_US |
dc.contributor.author | Saracino, S. | en_US |
dc.contributor.author | ORIGLIA, Livia | en_US |
dc.contributor.author | Marchetti, E. | en_US |
dc.contributor.author | Ferraro, F. R. | en_US |
dc.contributor.author | Lanzoni, B. | en_US |
dc.contributor.author | Geisler, D. | en_US |
dc.contributor.author | Cohen, R. E. | en_US |
dc.contributor.author | Mauro, F. | en_US |
dc.contributor.author | Villanova, S. | en_US |
dc.date.accessioned | 2020-06-26T10:24:18Z | - |
dc.date.available | 2020-06-26T10:24:18Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/26227 | - |
dc.description.abstract | Ground-based imagers at 8 m class telescopes assisted by multi-conjugate adaptive optics are primary facilities with which to obtain accurate photometry and proper motions in dense stellar fields. We observed the central region of the globular clusters Liller 1 and NGC 6624 with the Gemini Multi-conjugate Adaptive Optics System (GeMS) feeding the Gemini South Adaptive Optics Imager (GSAOI) currently available at the Gemini South telescope, under different observing conditions. We characterized the stellar point-spread function (PSF) in terms of FWHM, Strehl ratio (SR), and encircled energy (EE), over the field of view (FOV). We found that, for sub-arcsecond seeing at the observed airmass, we can obtain the diffraction-limited PSF (FWHM ≈ 80 mas), SR ∼ 40%, and EE ≥ 50% with a dispersion around 10% over the FOV of 85″ × 85″, in the K <SUB> s </SUB> band. In the J band the best images provide FWHMs between 60 and 80 mas, SR \gt 10 % , and {EE}\gt 40 % . For seeing at the observed airmass exceeding 1″, the performance worsens but it is still possible to perform PSF fitting photometry with 25% EE in J and 40% in K <SUB> s </SUB>. We also computed the geometric distortions of GeMS/GSAOI and we obtained corrected images with an astrometric accuracy of ∼1 mas in a stellar field with high crowding. | en_US |
dc.language.iso | eng | en_US |
dc.title | GeMS/GSAOI Photometric and Astrometric Performance in Dense Stellar Fields | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/833/1/111 | en_US |
dc.identifier.scopus | 2-s2.0-85006340317 | en_US |
dc.identifier.isi | 000390765800007 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/833/1/111 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 833 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 111 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | DEU | en_US |
dc.contributor.country | CHL | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2016ApJ...833..111D | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.orcid | 0000-0003-4237-4601 | - |
crisitem.author.orcid | 0000-0002-6040-5849 | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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Dalessandro_2016_ApJ_833_111.pdf | Pdf editoriale | 12.28 MB | Adobe PDF | View/Open |
26227-Dalessandro_2016_ApJ_833_111_P01.pdf | Miur | 7.78 MB | Adobe PDF | |
26227-Dalessandro_2016_ApJ_833_111_P02.pdf | Miur | 4.57 MB | Adobe PDF |
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