Papers & presentations!

 

Selected presentations

 

This page links mainly to presentations and talks.  For ordinary papers, follow links from the research pages or go to ADS.

  OBSERVATIONAL FRONTIERS

 

Astronomical imaging a thousand times sharper than the Hubble Space Telescope requires kilometer-sized optical interferometers.  This is feasible through intensity interferometry, a quantum-optical method that is insensitive to atmospheric turbulence:

 

Introductions to intensity interferometry:

SPIE Press release (2016): SPIE Invited review (2016), Handbook of Astronomical Instrumentation (2019)

 

D.Dravins, T.Lagadec, P.D.Nuñez:
Long-baseline optical intensity interferometry. Laboratory demonstration of diffraction-limited imaging
Published under open access in Astronomy & Astrophysics 580, A99 (2015);

doi:http://dx.doi.org/10.1051/0004-6361/201526334 .

 

D.Dravins, T.Lagadec, P.D.Nuñez:
Optical aperture synthesis with electronically connected telescopes
Published under open access in Nature Communications 6:6852 (2015); doi:10.1038/ncomms7852;

http://www.nature.com/ncomms/2015/150416/ncomms7852/full/ncomms7852.html .

 

D.Dravins, T.Lagadec:
Stellar Intensity Interferometry over Kilometer Baselines: Laboratory simulation of observations with the Cherenkov Telescope Array
Talk presented at the SPIE conference on Astronomical Telescopes + Instrumentation, Montréal, Québec, Canada, June 2014;  Optical and Infrared Interferometry IV, J.K.Rajagopal, M.J.Creech-Eakman & F.Malbet, eds.: SPIE Proc 9146 (2014);

http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1891922 ; preprint http://arxiv.org/abs/1407.5993 .

 

D.Dravins:
Intensity Interferometry with Cherenkov Telescope Arrays: Prospects for submilliarcsecond optical imaging
Invited talk at the colloquium "Improving the performances of current optical interferometers & future designs", Observatoire de Haute-Provence, France, September 2013 (Video; mov, 310 MB)

 

D.Dravins, S.LeBohec, H.Jensen, P.D.Nuñez:
Stellar Intensity Interferometry: Prospects for sub-milliarcsecond optical imaging
New Astronomy Reviews 56, 143-167 (2012); http://dx.doi.org/10.1016/j.newar.2012.06.001 , preprint http://arxiv.org/abs/1207.0808 .

 

D.Dravins, S.LeBohec, H.Jensen, P.D.Nuñez, for the CTA Consortium:
Optical Intensity Interferometry with the Cherenkov Telescope Array
Published under open access in Astroparticle Physics 43, 331-347 (2013); http://dx.doi.org/10.1016/j.astropartphys.2012.04.017 , preprint http://arxiv.org/abs/1204.3624 .

 

 

  HIGHEST-RESOLUTION SPECTROSCOPY

 

3-dimensional and time-dependent hydrodynamic simulations are now established as realistic descriptions for the convective photospheres of various stars, and must be applied for any more precise determinations of chemical abundances, oscillation properties, or atmospheric structure.  To verify (or falsify) such models ideally requires high-resolution spectroscopy across spatially resolved stellar surfaces.

 

 

Dainis Dravins, Hans-Günter Ludwig, Erik Dahlén, Hiva Pazira:

Spatially resolved spectroscopy across stellar surfaces. I. Using exoplanet transits to analyze 3D stellar atmospheres, Astron.Astrophys. 605, A90 (2017);

 

Spatially resolved spectroscopy across stellar surfaces. II. High-resolution spectra across HD 209458 (G0 V), Astron.Astrophys. 605, A91 (2017)

 

Dainis Dravins, Martin Gustavsson, Hans-Günter Ludwig:

Spatially resolved spectroscopy across stellar surfaces. III. Photospheric Fe I lines across HD 189733A (K1 V), Astron.Astrophys. 616, A144 (2018)

 

Dainis Dravins, Hans-Günter Ludwig, Bernd Freytag:

Spatially resolved spectroscopy across stellar surfaces. IV. G, & K-stars: Synthetic 3-D spectra at hyper-high resolution, Astron.Astrophys. 649, A16 (2021)

 

Dainis Dravins, Hans-Günter Ludwig, Bernd Freytag:

Spatially resolved spectroscopy across stellar surfaces. V. Observational prospects: toward Earth-like exoplanet detection, Astron.Astrophys. 649, A17 (2021)

 

  High-Fidelity Spectroscopy at the Highest Resolutions

Highlight talk at the AG meeting 'Deciphering the Universe through Spectroscopy', Potsdam, 2009 (60 slides; PDF, 6 MB & PowerPoint, 36 MB); Astron.Nachr. 331, 535-540, 2010

 

Lennart Lindegren, Dainis Dravins:

Astrometric radial velocities for nearby stars, Astron.Astrophys.; arXiv:2105.09014 (2021)

 

 

  'Ultimate' Information on Content in Solar and Stellar Spectra: Photospheric line asymmetries and wavelength shifts

Astron.Astrophys. 492, 199-213 (2008)

 

 The Spectroscopic Road towards Exoplanets

History of the spectroscopic search for exoplanets from its beginnings until 1995.  Talk at the Lund University Pufendorf Institute symposium 'Exoplanets: Past, Present, and Future' (2011): Video (mp4, 25 minutes, 124 MB)

 

  ASTRONOMICAL QUANTUM OPTICS

 

Photonic Astronomy and Quantum Optics

Book chapter in: D.Phelan, O.Ryan & A.Shearer, eds.: High Time Resolution Astrophysics (Astrophysics and Space Science Library 351, pp. 95-132), Springer, 2008.  The full publication is available at http://www.springerlink.com . 

 

Photonic Astronomy & Quantum Optics

Talk at Institut non linéaire de Nice (PDF, 13 MB & PowerPoint, 23 MB)

 

 

 

Designing a quantum-optical instrument for extremely large telescopes:

 

D.Dravins et al.: QuantEYE. Quantum Optics Instrumentation for Astronomy
ESO OWL Instrument Concept Study, 2005 (PDF; 280 pages)
 

C.Barbieri et al.: QuantEYE. The Quantum Optics Instrument for OWL

Poster; IAU Symp.232 'The Scientific Requirements for Extremely Large Telescopes' (2005)

 

G.Naletto et al.: Very Fast Photon Counting Photometers for Astronomical Applications: From QuantEYE to AquEYE
SPIE conf. 6583 'Photon Counting Applications', 65830B (2007)

 

D.Dravins: The Post-CCD Era in Optical Astronomy

'Sceptics Corner', European Astronomical Society Newsletter, June 2002
 

 

The Time Domain: A New Window to the Universe!

Invited talk at the 'Robotic Astronomy' thinkshop, Potsdam, 2004 (80 slides; PowerPoint, 12 MB)

 

 European Southern Observatory, Its Past, Present, and Future – A personal view

 

First presented in Vilnius/Moletai 2006; updated 2011 (184 slides; PDF, 23 MB, PowerPoint, 64 MB)

 

  Report by the ESA-ESO Working Group on Extra-Solar Planets

 

M.Perryman, O.Hainaut, D.Dravins, et al., 2005 (PDF, 94 pages) 

 

Page created by Dainis Dravins; comments are welcome to dainis @ astro.lu.se
 
Updated JD 2,459,371
 
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