Gli obiettivi scientifici di questo programma necessitano lo sviluppo di tecniche che siano lo stato dell'arte in fotometria e astrometria per due fra le piu` importanti infrastrutture spaziali in astronomia, e per una terza da terra, che fungera` da precursore per una altra futura missione spaziale in fase di realizzazione. Specificamente:
1. James Webb Space Telescope program GO-1979, NIRCam/NIRISS
2. Hubble Space Telescope multy-cycles programs GO-13748/14330/15884/16653/16983/17077/17080
3. VISTA telescope of ESO, programs are the VVV/VVVx surveys
Our science goals require state-fo-the-art astrometry-photometry for the two best world-wide astronomical space facilities, and for a third ground-based:
1. James Webb Space Telescope program GO-1979, NIRCam/NIRISS
2. Hubble Space Telescope multy-cycles programs GO-13748/14330/15884/16653/16983/17077/17080
3. VISTA telescope of ESO, programs are the VVV/VVVx surveys
Popolazioni e ammassi stellari galattici ed extragalattici
Struttura ed evoluzione stellare, incluse le fasi finali
Mezzo interstellare, formazione di stelle e sistemi planetari
Origine ed evoluzione dei pianeti, satelliti e corpi minori
Tecnologie Informatiche e software
Tecnologie per osservazioni da spazio
Tecnologie per osservazioni da Terra
Infrastrutture da Terra (utilizzo)
Infrastrutture dallo spazio per l’osservazione dell Universo (utilizzo)
Infrastrutture dallo spazio per l’osservazione dell Universo (sviluppo/operazioni)
Team Summary
15. Personale INAF coinvolto
Numero di partecipanti INAF al progetto: 4
Struttura
Nfte
N0
TI 2023
TI 2024
TI 2025
TD 2023
TD 2024
TD 2025
Nex
Extra
O.A. PADOVA
4
0
0.80
0.80
0.80
1.70
1.60
0.00
0
0.00
Totali
4
0
0.80
0.80
0.80
1.70
1.60
0.00
0
0.00
16. Personale Associato INAF coinvolto
Numero di partecipanti Associati INAF: 3
#
Struttura
TI 2023
TI 2024
TI 2025
TD 2023
TD 2024
TD 2025
Extra
1
Università degli Studi di Ferrara
0
0
0
0.80
0.80
0.00
0.00
2
osservatorio di Padova
0
0
0
0.80
0.80
0.00
0.00
3
STScI / INAF-OAPD da 2024
0
0
0
0.00
0.00
0.00
0.00
Totali
0.00
0.00
0.00
1.60
1.60
0.00
0.00
Fondi a sostegno
21. Totale fondi a disposizione (dato aggregato, k€)
Certi 2023
Certi 2024
Certi 2025
Presunti 2023
Presunti 2024
Presunti 2025
0.0
0.0
0.0
300.0
300.0
450.0
Produzione scientifica e tecnologica
22. Produzione scientifica e tecnologica - Highlights
#
DOI
Descrizione
Azione
1
10.1093/mnras/stz1968
Titolo: The HST large programme on NGC~6752 \textendash III. Detection of the peak of the white dwarf luminosity function
Autori:L R Bedin and M Salaris and J Anderson and M Libralato and D Apai and D Nardiello and R M Rich and ....
Publisher:Oxford University Press (OUP)
Rivista: Monthly Notices of the Royal Astronomical Society
Anno pubblicazione:2019
2
10.1093/mnras/staa540
Titolo: Extending Gaia \hspace0.167emDR2 with HST\hspace0.167em narrow-field\hspace0.167emastrometry \textendash II. Refining the method on WISE J163940.83-684738.6\ding72
Autori:L R Bedin and C Fontanive
Publisher:Oxford University Press (OUP)
Rivista: Monthly Notices of the Royal Astronomical Society
Anno pubblicazione:2020
3
10.1093/mnras/sty2626
Titolo: Extending Gaia\hspace0.167emDR2 with HST narrow-field astrometry: the WISE\hspace0.167emJ154151.65-225024.9 test case
Autori:L R Bedin and C Fontanive
Publisher:Oxford University Press (OUP)
Rivista: Monthly Notices of the Royal Astronomical Society
Anno pubblicazione:2018
4
10.1093/mnras/stx1177
Titolo: Hubble Space Telescope astrometry of the closest brown dwarf binary system \textendash I. Overview and improved orbit\ding72
Autori:L. R. Bedin and D. Pourbaix and D. Apai and A. J. Burgasser and E. Buenzli and H. M. J. Boffin and ....
Publisher:Oxford University Press (OUP)
Rivista: Monthly Notices of the Royal Astronomical Society
Anno pubblicazione:2017
5
10.1093/mnras/sty3316
Titolo: Praesepe white dwarfs inGaia\hspace0.167emDR2
Autori:M Salaris and L R Bedin
Publisher:Oxford University Press (OUP)
Rivista: Monthly Notices of the Royal Astronomical Society
Anno pubblicazione:2018
6
10.1093/mnrasl/slad021
JWST unveils the brown dwarf sequence of 47 Tucanæ
Autori:D Nardiello and M Griggio and L R Bedin
Publisher:Oxford University Press (OUP)
Rivista: Monthly Notices of the Royal Astronomical Society: Letters
Anno pubblicazione:2023
We have developed a technique to restore scientific usage in compromised (publicly available) images collected with the JWST of the Galactic globular cluster NGC 104 (47 Tucanæ). In spite of the degradation and limited data, we were able to recover photometry and astrometry for the coolest stellar objects ever observed within a globular cluster, possibly unveiling the brightest part of the brown dwarf (BD) sequence. This is supported by (i) proper motion membership, derived by the comparison with positions obtained from Hubble Space Telescope archival early epochs, (ii) the predicted location of the BD sequence, and (iii) the mass function for low-mass stars derived from models. Future JWST observations will provide the necessary deep and precise proper motions to confirm the nature of the here-identified BD candidates belonging to this globular cluster.
7
10.1002/asna.20230006
Photometry and astrometry with JWST - II. NIRCam distortion correction
Griggio, M. ; Nardiello, D. ; Bedin, L. R.
In preparation to make the most of our own planned James Webb Space Telescope investigations, we take advantage of publicly available calibration and early-science observations to independently derive and test a geometric-distortion solution for NIRCam detectors. Our solution is able to correct the distortion to better than ~0.2 mas. Current data indicate that the solution is stable and constant over the investigated filters, temporal coverage, and even over the available filter combinations. We successfully tested our geometric-distortion solution in three cases: (i) field-object decontamination of M 92 field; (ii) estimate of internal proper motions of M 92; and (iii) measurement of the internal proper motions of the Large Magellanic Cloud system. To our knowledge, the here-derived geometric-distortion solution for NIRCam is the best available and we publicly release it, as many other investigations could potentially benefit from it. Along with our geometric-distortion solution, we also release a Python tool to convert the raw-pixels coordinates of each detector into distortion-free positions, and also to put all the ten detectors of NIRCam into a common reference system.
8
10.1093/mnras/stac3219
Titolo: The $\less$i$\greater$HST$\less$/i$\greater$ large programme on NGC 6752 \textendash IV. The White Dwarf sequence
Autori:L R Bedin and M Salaris and J Anderson and M Scalco and D Nardiello and E Vesperini and H Richer an ....
Publisher:Oxford University Press (OUP)
Rivista: Monthly Notices of the Royal Astronomical Society
Anno pubblicazione:2022
We present our final study of the white dwarf cooling sequence (WD CS) in the globular cluster NGC 6752. The investigation is the main goal of a dedicated Hubble Space Telescope large program, for which all the observations are now collected. The WD CS luminosity function (LF) is confirmed to peak at mF606W ≃ 29.3 ± 0.1, consistent within uncertainties with what has been previously reported, and is now complete down to mF606W ≃ 29.7. We have performed robust and conclusive comparisons with model predictions that show how the theoretical LF for hydrogen envelope WD models closely follow the shape of the empirical LF. The magnitude of the peak of the observed LF is matched with ages between 12.7 and 13.5 Gyr, consistent with the cluster age derived from the main sequence turn off and subgiant branch. We also find that the impact of multiple populations within the cluster on the WD LF for mF606W below 27.3 is negligible, and that the presence of a small fraction of helium envelope objects is consistent with the data. Our analysis reveals a possible hint of an underestimate of the cooling time-scales of models in the magnitude range 28.1 < mF606W < 28.9. Finally, we find that hydrogen envelope models calculated with a new tabulation of electron conduction opacities in the transition between moderate and strong degeneracy provide WD ages that are too small in comparison to the main sequence turnoff age.
9
10.1093/mnras/stac2659
Titolo: Photometry and astrometry with $\less$i$\greater$JWST$\less$/i$\greater$ \textendash I. NIRCam point spread functions and the first $\less$i$\greater$JWST$\less$/i$\greater$ colour\textendashmagnitude diagrams of a globular cluster
Autori:D Nardiello and L R Bedin and A Burgasser and M Salaris and S Cassisi and M Griggio and M Scalco
Publisher:Oxford University Press (OUP)
Rivista: Monthly Notices of the Royal Astronomical Society
Anno pubblicazione:2022
As the James Webb Space Telescope (JWST) has become fully operational, early release data are now available to begin building the tools and calibrations for precision point-source photometry and astrometry in crowded cluster environments. Here, we present our independent reduction of NIRCam imaging of the metal-poor globular cluster M 92, which were collected under Director's Discretionary Early Release Science programme ERS-1334. We derived empirical models of the point spread function (PSF) for filters F090W, F150W, F277W, and F444W, and find that these PSFs: (i) are generally undersampled (FWHM ~ 2 pixel) in F150W and F444W and severely undersampled (FWHM ~ 1 pixel) in F090W and F277W; (ii) have significant variation across the field of view, up to ~15-20 per cent; and (iii) have temporal variations of ~ 3-4 per cent across multi-epoch exposures. We deployed our PSFs to determine the photometric precision of NIRCam for stars in the crowded, central regions of M 92, measured to be at the ~0.01 mag level. We use these data to construct the first JWST colour-magnitude diagrams of a globular cluster. Employing existing stellar models, we find that the data reach almost the bottom of the M 92 main sequence (~0.1 M⊙), and reveal 24 white dwarf candidate members of M 92 in the brightest portion of the white dwarf cooling sequence. The latter are confirmed through a cross-match with archival HST UV and optical data. We also detect the presence of multiple stellar populations along the low-mass main sequence of M 92.
10
10.1016/j.newast.2009.12.002
Titolo: VISTA Variables in the Via Lactea (VVV): The public ESO near-IR variability survey of the Milky Way
Autori: Minniti, D. ; Lucas, P. W. ; Emerson, J. P. ; Saito, R. K. ; Hempel, M. ; Pietrukowicz, P. search by orcid ; Ahumada, A. V. ; Alonso, M. V. search by orcid ; Alonso-Garcia, J. search by orcid ; Arias, J. I. ; Bandyopadhyay, R. M. ; Barbá, R. H. search by orcid ; Barbuy, B. ; Bedin, L. R. et al.
Anno pubblicazione:2010
We describe the public ESO near-IR variability survey (VVV) scanning the Milky Way bulge and an adjacent section of the mid-plane where star formation activity is high. The survey will take 1929 h of observations with the 4-m VISTA telescope during 5 years (2010-2014), covering ∼10 9 point sources across an area of 520 deg 2, including 33 known globular clusters and ∼350 open clusters. The final product will be a deep near-IR atlas in five passbands (0.9-2.5 μm) and a catalogue of more than 10 6 variable point sources. Unlike single-epoch surveys that, in most cases, only produce 2-D maps, the VVV variable star survey will enable the construction of a 3-D map of the surveyed region using well-understood distance indicators such as RR Lyrae stars, and Cepheids. It will yield important information on the ages of the populations. The observations will be combined with data from MACHO, OGLE, EROS, VST, Spitzer, HST, Chandra, INTEGRAL, WISE, Fermi LAT, XMM-Newton, GAIA and ALMA for a complete understanding of the variable sources in the inner Milky Way. This public survey will provide data available to the whole community and therefore will enable further studies of the history of the Milky Way, its globular cluster evolution, and the population census of the Galactic Bulge and center, as well as the investigations of the star forming regions in the disk. The combined variable star catalogues will have important implications for theoretical investigations of pulsation properties of stars.
Luigi Bedin, is "Ricercatore" at INAF, OAPD, and he is the international Principal Investigator of the approved JWST program: GO-1979<p>( progetto <a href="https://www.stsci.edu/jwst/science-execution/program-information.html?id=1979" target="_blank">https://www.stsci.edu/jwst/science-execution/program-information.html?id=1979</a> ), <br><br>and Principal Investigator of the HST multi-Cycle programs: GO-16553 on Proxima Centauri, programs IDs: GO-13748-14330-15884 on Luhman16AB, and of GO-17080 on WISE-0855.<br>( https://www.stsci.edu/hst/phase2-public/{15584/16653/16983/17080.pro )<br>Luigi Bedin is also PI of treasury program GO-17077, which will search for exoplanets orbiting stars of two populous star clusters employing also data collected by the Kepler mission.<br>https://www.stsci.edu/hst/phase2-public/17077.pro<br>)<br><br>Under the ESO program VVV/VVVx surveys (PI: Minniti), Bedin is the responsible for the task of high-precision astrometry.<br><br>Therefore, in turn, INAF has the plain leadership of these programs based on already granted observing tim eat world-wide space facilities.<br></p><p><br></p><p><br></p>
<p>1) Hubble Space Telescope; James Webb Space Telescope; NASA/ESA; </p><p>2) Universita` di Ferrara; </p><p>3) U. Arizona Steward Observatorty Tucson & Lunar and Planetary Observatory, USA; </p><p>4) Univ. of Bonn, Germany; <br></p><p>5) University of California - San Diego, USA;<br></p><p>6) Universite de Montreal, Canada;<br></p><p>7) Osservatorio Astronomico di Padova, INAF</p><p>8) Universidad Adolfo Ibanez, Chile;</p><p>9) Liverpool John Moores University, UK;</p><p>10) Space Telescope Science Institute, Baltimore, MD, USA.<br></p>
15. Team members, Informazioni generali
15. Personale INAF coinvolto
#
Nome
E-mail
Struttura
TI
Qualifica
Ruolo nel Progetto
FTE Impegnate (2023/2024/2025)
FTE Presunte (2023/2024/2025)
Extra
1
luigi.bedin
luigi.bedin@inaf.it
O.A. PADOVA
Y
RICERCATORE
PI, coordinamento internazionale del progetto, riduzione dati, analisi data, pubblicazione dei risultati
X X X
X X X
X
2
michele.scalco
michele.scalco@inaf.it
O.A. PADOVA
N
BORSISTA
Dottorando su HST / Assegnista su HST
X X X
X X X
X
3
massimo.griggio
macscuea@gmail.com
O.A. PADOVA
N
ASSOCIATO - DOTTORANDO STRUTTURE
Dottorando su dati HST, JWST e VVV/VVVx
X X X
X X X
X
4
domenico.nardiello
domenico.nardiello@googlemail.com
O.A. PADOVA
N
ASSEGNISTA
Assegnista su HST e JWST
X X X
X X X
X
16. Personale Associato INAF coinvolto
#
Nome
E-mail
Struttura
TI
Qualifica
Ruolo nel Progetto
FTE Impegnate (2023/2024/2025)
FTE Presunte (2023/2024/2025)
Extra
1
massimo.griggio
massimo.griggio@inaf.it
Università degli Studi di Ferrara
N
PhD Student
Dottorando su dati HST, JWST e VVV/VVVx
[0.8, 0.8, 0]
[-1.0, -1.0, 0.8]
-1.0
2
michele.scalco
michele.scalco@inaf.it
osservatorio di Padova
N
Dottorando Universita` di Ferrara
Dottorando su HST / Assegnista su HST
[0.8, 0.8, 0]
[-1.0, -1.0, 0.8]
-1.0
3
mattia.libralato
libra@stsci.edu
STScI / INAF-OAPD da 2024
N
TD
Assegnista lead della ricerca astrometrica di compagni oscuri in sistemi delle nane e brune rosse vicine
[0, 0, 0]
[-1.0, 0.3, 0.5]
-1.0
21. Fondi a Sostegno Iniziativa
Abbiamo sottomesso applicazione al recente Bando FISProcedura competitiva per lo sviluppo delle attività di ricerca fondamentale, a valere sul Fondo italiano per la Scienza.
Presto sottometteremo applicazione per sostegno INAF alla ricerca di base su programmi con GO.
L'anno prossimo applicheremo al Bando PRIN-MIUR
