2018 April: Invited talk at conference
"A Star Is Born", Spineto, Italy
Title: Populating the post-AGB HRD using GALEX, SDSS, PanSTARRS, HST, Gaia to solve critical puzzles in stellar evolution
2018 April: Contribution at STScI Symp. 2018, The XXI Century H-R Diagram: “The Power of Precision Photometry”, STScI Baltimore, MD
Title: Populating the elusive post-AGB HRD with GALEX-SDSS-PanSTARRS-Gaia-HST
to clarify late phases of stellar evolution phases and the chemical enrichment of galaxies.
2017 July: NUVA Conference on UV Surveys , Tel Aviv, IL
Invited talk N.1 :
Title: A characterization of the post-AGB stellar population from GALEX-SDSS-PanSTARRS-HST-Gaia surveys
Invited talk N.2 :
Title: New source catalogs and science tools from the GALEX UV sky surveys.
2017 April: “Hubble Conference V”, April 2017, Venice, Italy
Title: Massive Stars and Dust: the Key to Trace Star-formation Throughout the History of the Universe from three Decades of Studies of Local Galaxies with HST.
2014 Aug.6: HotSci Colloquium, STScI,
2014 June 24: Colloquium at SISSA, Trieste, Italy
2014 May 14: Seminar at OAP Meudon, France
2014 May: Invited Visiting Professor at O. A. Paris, F
2013 Oct. 7: Invited review at
NUVA Conference, Garching, Germany
2013 June: Invited Visiting Scientist, University of Padua, Italy
2013 Jan. 9: 221st AAS meeting, Long Beach, CA
2012 Sept. 4: GALEX-FEST, Pasadena, Invited talk
2012 Aug. 15, STScI Colloquium
2012 July, COSPAR 2012, Mysore, India --- cancelled ---
2012 June , Princeton, Martin Schwarzschild Centennial Meeting "The Great Andromeda galaxy", Invited talk
2011, July, Tenerife, Spain;
IAU Symp. 283 "Planetary Nebulae: an Eye to the Future" (July 25-29, 2011), invited review:
2010 June, Russian Academy of Sciences, St Petersburg, Russia, invited review at the conference "UV Universe 2010"
2009 Dec.10- STScI, Baltimore
2009 Aug. 19 - HIA-NRC, Canada
2009 June 19 - Univ. of Padua, Italy
2009 April 10 - Rutgers University
2007 Oct. 17 - at
"UV and X-Ray Science Planning for ASTROSAT" Montreal, CA
2007 May 29 - Invited talk at
``Space Astronomy:
The UV Window to the Universe'' (El Escorial, SPAIN, May 29 - June 1 2007)
2006 Aug. - Invited talk at IAU General Assembly - JD 4 - Prague
2006 June 8, University of Trieste, Italy
2006 March 23 - Colloquium at Yale Univ.
2005 Apr. 28 - Colloquium at JHU
2005 Mar. 30 - U. Penn, Philadelphia
2004 Oct. 11-13, - Invited Talk at the Conference
New windows on star formation in the cosmos
2004 April 28 - talk at JHU
2004 April 22 - colloquium at University of Delaware
2004 Mar. 10 - talk at STScI
Title: The UV sky: the legacy of the GALEX surveys
Abstract: The Galaxy Evolution Explorer (GALEX) imaged the sky in the Ultraviolet (UV) for nine years,
delivering the first sky surveys at these wavelengths. Its database contains
far-UV (lambda_eff ~ 1528Ang) and near-UV (lambda_eff ~ 2310Ang) imaging of most of the sky,
it includes over 200 million source measurements and deep UV maps of extended galaxies.
The GALEX archive is a long-lasting resource for statistical
studies of hot stellar objects, z<2 QSOs, star-forming galaxies, nebulae and the interstellar medium.
It provides an unprecedented road-map for planning future UV instrumentation
and follow-up observing programs in the UV and at other wavelengths.
I will present final science-ready catalogs and available tools, which facilitate scientific
exploitation of the UV surveys. Among the science results
uniquely enabled by these data, is the search for hot white dwarfs (WD).
These stars are elusive at all wavelengths except the UV, owing to their hot
temperatures and low optical luminosities. The GALEX unbiased census of
of hot WDs, an increase by over two orders of magnitude over previously known samples,
reveals this elusive component of the MW stellar populations out to several kpc, opening
new ways to probe post-ABG evolution and to find types of binaries otherwise elusive.
The hot-WD samples are analyzed with Milky Way models, and validated
with HST follow-up observations, to clarify critical aspects of stellar
evolution, such as the initial-final mass relation. The IFMR, which maps the WD mass to that of
its main-sequence progenitor, is relevant for understanding the yield of chemical elements
and galaxy evolution.
Title: Stellar populations in nearby galaxies:
a stepping stone for understanding the evolution of stars, galaxies, and our universe.
Abstract:
Studies of young stellar populations in local galaxies, spanning a variety of
environments and physical conditions, reveal the modalities of the star-formation process and the
co-evolution of massive stars and dust. Massive stars drive the dynamical and chemical evolution of
their host galaxy. Mapped across large portions of galaxies, they provide a precise time- and space-
tomography of the young stellar populations, because of their fast evolutionary time-scales, revealing
how gas and dust condense to form stars, and how local star-bursts evolve and dissolve with time.
The complementary capabilities of two recent space telescopes, GALEX and Hubble, have enabled
substantial progress in this field. GALEX has provided unprecedented wide-field, sensitive views of
young stellar populations across extended galaxies, has characterized star-formation down to very low
levels, previously undetected, and measured the star-formation history of the universe up to redshift
~2. With Hubble, we are able to resolve the individual stellar constituents of nearby star-forming
regions, and measure their physical parameters.
The ensemble of results from such studies informs new-generation stellar and galaxy evolution models,
which in turn underpin our interpretation of the integrated light from galaxies in the distant, younger
universe, ultimately to unravel its evolution.
Title: The role of rest-frame UV data in studies of stellar populations : the legacy of GALEX and HST in the Milky Way and the local universe
Title: Review of GALEX results
Title: Characterizing the Content and Spatial Clustering of Hot Massive Stars in M31 from the PHAT Survey
Title: A stellar legacy from the GALEX UV surveys: an unbiased census of hot white dwarfs to clarify stellar evolution
Title: Hot stars and Dust in Local Group Galaxies
Title: Results from the GALEX mission
Title: Young Stellar Populations and Star Formation in M31
Title: New Advances in the Field of Planetary Nebulae from Ultraviolet Observations
Title: ``GALEX and star formation"
Title:
Star formation in Local Group galaxies from low- and high-resolution
multiband imaging (GALEX and HST)
Title: Star Formation in the Local Group.
Title: Star formation in the local universe and UV sky surveys.
Title: Star Formation in the Local Universe
The UV sky: results from the GALEX surveys
The Ultraviolet Sky Surveys:
Filling the Crucial Gap in our View of the Universe
``High mass stars: Stellar Populations''
Learning about Star Formation from the Local Universe
``The Ultraviolet Sky: Learning about Star Formation from the Local Universe''
``The Ultraviolet Sky: results from the GALEX mission''
``The GALEX view of the local Universe''
``Global Mapping of Milky Way Star Formation with GALEX''
``GALEX sampler (of capabilities, images, results)''
"The Recent Star Formation: Early Results from GALEX UV surveys"
"Early Results from GALEX"