Diana Valencia
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Chemical Diversity of Super-Earths As a Consequence of Formation
MNRAS 000,1{16 (2019) Preprint 24 February 2020 Compiled using MNRAS LATEX style file v3.0 Chemical Diversity of Super-Earths As a Consequence of Formation Jennifer Scora,1? Diana Valencia,2 Alessandro Morbidelli3 and Seth Jacobson4 1Department of Astronomy and Astrophysics, University of Toronto, Toronto, ON, Canada 2Centre for Planetary Sciences, University of Toronto, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada 3Laboratoire Lagrange, Universit´eC^ote d'Azur, Observatoire de la C^ote d'Azur, CNRS, Blvd de l'Observatoire, CS 34229, 06304 Nice Cedex 4, France 4Department of Earth and Environmental Sciences, Michigan State University, East Lansing, MI 48824, USA Accepted XXX. Received YYY; in original form ZZZ ABSTRACT Recent observations of rocky super-Earths have revealed an apparent wider distribu- tion of Fe/Mg ratios, or core to mantle ratios, than the planets in our Solar System. This study aims to understand how much of the chemical diversity in the super-Earth population can arise from giant impacts during planetary formation. Planet forma- tion simulations have only recently begun to treat collisions more realistically in an attempt to replicate the planets in our Solar System. We investigate planet formation more generally by simulating the formation of rocky super-Earths with varying initial conditions using a version of SyMBA, a gravitational N-body code, that incorporates realistic collisions. We track the maximum plausible change in composition after each impact. The final planets span a range of Fe/Mg ratios similar to the Solar System planets, but do not completely match the distribution in super-Earth data. -
W065 Benneke Exoplanet Instrumentation.Pdf
White Paper ID Number W065 Title of White Paper Exoplanet instrumentation in the 2020s: Canada’s pathway towards searching for life on potentially Earth-like exoplanets ID of Associated Expression of E068 Interest Topic Area of White Paper new facilities, experiments and missions Executive Summary of White Paper (5000 character limit) The next decade presents a unique moment in the history of planetary astronomy. For the rst time, we have the technologies at hand to discover and characterize a wide range of exoplanetary systems, possibly harboring true Earth analogues. The opportunity is no less than answering humanity’s millennia old questions of “Are we alone?” and “How did we get here?”. The best part: Canada can play a leading role in this historic endeavor, if we make deliberate strategic investments over the next decade. In this white paper, we lay out pathways to develop the necessary instrumentation in collaboration with national and international partners to address the most fundamental questions regarding the formation of planets, the diversity of planetary systems, and the frequency of life in the universe. We recommend critical investments in a portfolio of assets including high-dispersion coronagraphy instrumentation for the upcoming ground based 30-meter class telescopes, a strong (JWST-scale) Canadian involvement in the next generation space missions LUVOIR or HabEx, and support for small and large space missions led by Canada. Importantly, while the science case of searching for biomarkers on rocky exoplanets presents the most stringent design requirements, the proposed instrumentation will also be ideal for the characterization of giant exoplanets, sub-Neptunes, and super-Earths and address a wide range of science questions in the coming decade. -
Arxiv:2103.08481V1 [Astro-Ph.IM] 15 Mar 2021 2 Helled Et Al
Noname manuscript No. (will be inserted by the editor) Ariel Planetary Interiors White Paper Ravit Helled, Stephanie Werner, Caroline Dorn, Tristan Guillot, Masahiro Ikoma, Yuichi Ito, Mihkel Kama, Tim Lichtenberg, Yamila Miguel, Oliver Shorttle, Paul J. Tackley, Diana Valencia, Allona Vazan the date of receipt and acceptance should be inserted later Helled, R., Dorn, C., Institute for Computational Science, University of Zurich, Winterthurerstr. 190, CH-8057 Zurich, Switzerland E-mail: [email protected] Werner, S. Department of Geosciences, University of Oslo, PO 1028 Blindern, 0315 Oslo, Norway Guillot, T. Observatoire de la C^oted'Azur / CNRS, 6304 Nice Cedex 4, France Ikoma, M. The University of Tokyo, Department of Earth and Planetary Science, Tokyo 113-0033, Japan Ito, Y., Department of Physics and Astronomy, University College London, London, WC1E 6BT, United Kingdom Kama, M. Tartu Observatory, University of Tartu, Observatooriumi 1, 61602, T~oravere, Estonia Lichtenberg, T. Atmospheric, Oceanic and Planetary Physics, Department of Physics, University of Oxford, United Kingdom Miguel, Y. Leiden Observatory, University of Leiden, Niels Bohrweg 2, 2333CA Leiden, The Nether- lands, SRON Netherlands Institute for Space Research , Sorbonnelaan 2, NL-3584 CA Utrecht, the Netherlands Shorttle, O. Institute of Astronomy, University of Cambridge, Cambridge, UK Tackley, P. J. Institute of Geophysics, ETH Zurich, 8092 Zurich, Switzerland Valencia, D. University of Toronto, Canada Vazan, A. Department of Natural Sciences, the Open University of Israel, Israel arXiv:2103.08481v1 [astro-ph.IM] 15 Mar 2021 2 Helled et al. Abstract The recently adopted Ariel ESA mission will measure the atmo- spheric composition of a large number of exoplanets. -
From Giant Planets to Super Earths Program and Abstracts
Exploring Strange New Worlds: From Giant Planets to Super Earths May 1 - 6, 2011 High Country Conference Center Flagstaff, Arizona Program and Abstracts Table of Contents Organizing Committees……………………………………………………. ……... 3 Conference Sponsors………………………………………………………………. 4 Conference Agenda………………………………………………………………… 5 Monday……………………………………………………………….... 5 Tuesday………………………………………………………….…....... 6 Wednesday……………………………………………………………... 7 Thursday……………………………………………………………….. 8 Friday…………………………………………………………………... 9 Poster for Geoff Marcy’s Public Lecture on Monday Evening……………………. 10 Table of Posters in Alphabetical Order by Author…….………………………....... 11 Table of Posters by Science Category……………….……………………….......... 17 List of Conference Participants…………………………………………………….. 23 Invited and Contributed Talk Abstracts in Agenda Order…………………………. 29 Poster Abstracts by Science Category……………………………………………... 70 Disks…………………………………………………………………… 70 Exoplanet Characterization…………………………………………….. 77 Habitability…………………………………………………………….. 90 Missions………………………………………………………………... 95 Planet Formation……………………………………………………….. 110 Planet-hosting Stars…………………………………………………..... 114 Planetary System Architecture…………………………………………. 120 Author Index……………………………………………………………………….. 129 Table of Contents Exploring Strange New Worlds | 3 Scientific Organizing Committee Charles Beichman, NExScI, California Institute of Technology (Co-chair) Malcolm Fridlund, European Space Agency (Co-chair) Willie Benz, Observatoire de Besancon Adam Burrows, Princeton University Mark Clampin, Goddard Space Flight -
Diana Valencia
Diana Valencia Assistant Professor, Physics & Astrophysics [email protected] Department of Physical & Environmental Sciences Phone: 416.208.2986 University of Toronto, Scarborough www.astro.utoronto.ca/~valencia 1265 Military Trail, Toronto, ON, Canada, M1C 1A4 RESEARCH INTERESTS Structure, composition and evolution of low-mass exoplanets: super-Earths and sub-Neptunes, rocky and icy/ocean planets and satellites; habitability; early evolution; tectonics; equations of state. EDUCATION Ph.D., Harvard University, Department of Earth & Planetary Sciences, 2008 M.A., University of Toronto, Physics Department, 2002 B. Sc., University of Toronto, Physics Specialist Program, 2001 POSITIONS 01.2013 – Assistant Professor, University of Toronto Scarborough 12.2010 – 12.2012 Sagan NASA Postdoctoral Fellow, Massachusetts Institute of Technology 10.2008 – 11.2010 Henri Poincare Postdoctoral Fellow, Observatoire de la Cote d’Azur, Nice, France 06.2008 – 10.2008 Origins of Life Postdoctoral Fellow, Department of Earth & Planetary Sciences, Harvard University 2002 – 2008 Origins of Life Graduate Fellow, Researcher/Teaching Fellow Department of Earth & Planetary Sciences, Harvard University HONORS & AWARDS Sagan NASA Postdoctoral Fellowship, 2010–2012 Henri Poincare Postdoctoral Fellowship, Observatoire de la Cote d’Azur, 2008–2010 Origins of Life Graduate Fellowship, Harvard University, 2006–2008 Nature Research Highlights, Feb 2007 GSAS Merit Fellowship Award, Harvard University, 2006 Stickney Fellowship, Harvard University, 2005 Dean's List