Curriculum Vitae of Fei
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Lurking in the Shadows: Wide-Separation Gas Giants As Tracers of Planet Formation
Lurking in the Shadows: Wide-Separation Gas Giants as Tracers of Planet Formation Thesis by Marta Levesque Bryan In Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy CALIFORNIA INSTITUTE OF TECHNOLOGY Pasadena, California 2018 Defended May 1, 2018 ii © 2018 Marta Levesque Bryan ORCID: [0000-0002-6076-5967] All rights reserved iii ACKNOWLEDGEMENTS First and foremost I would like to thank Heather Knutson, who I had the great privilege of working with as my thesis advisor. Her encouragement, guidance, and perspective helped me navigate many a challenging problem, and my conversations with her were a consistent source of positivity and learning throughout my time at Caltech. I leave graduate school a better scientist and person for having her as a role model. Heather fostered a wonderfully positive and supportive environment for her students, giving us the space to explore and grow - I could not have asked for a better advisor or research experience. I would also like to thank Konstantin Batygin for enthusiastic and illuminating discussions that always left me more excited to explore the result at hand. Thank you as well to Dimitri Mawet for providing both expertise and contagious optimism for some of my latest direct imaging endeavors. Thank you to the rest of my thesis committee, namely Geoff Blake, Evan Kirby, and Chuck Steidel for their support, helpful conversations, and insightful questions. I am grateful to have had the opportunity to collaborate with Brendan Bowler. His talk at Caltech my second year of graduate school introduced me to an unexpected population of massive wide-separation planetary-mass companions, and lead to a long-running collaboration from which several of my thesis projects were born. -
The Wonders of Star Formafion
The Wonders of Star Forma;on A tribute to Hans Zinnecker Edinburgh, Scotland 3-7 September, 2018 i John McIntyre Conference Centre Edinburgh UK 3rd - 7th September 2018 SOC Anthony Whitworth (Cardiff, UK, Co-Chair) Ken Rice (Edinburgh, UK, Co-Chair) Bo Reipurth (Hawaii, USA) Cathie Clarke (Cambridge, UK) Ian Bonnell (St Andrews, UK) Mark McCaughrean (ESA) Stephanie Walch (Cologne, Germany) Hal Yorke (USRA, USA) John Bally (Colorado, USA) Dimitris Stamatellos (UCLAN, UK) LOC Lyndsey Ballantyne Ken Rice ii Contents General Information 1 Information for Speakers . .1 Information for Posters . .1 WiFi Access . .1 Social Media . .1 Open forum: The Challenges Ahead . .2 Timetable . .3 Floorplan . .4 Getting Around Edinburgh . .5 Dining Options . .6 Excursions . .7 Useful Information . .7 Code of Conduct . .8 Talk Abstracts 9 Poster List & Abstracts 87 iii iv General Information Information for Speakers You are welcome to use your own laptops, but we will also be providing a Mac with OS X and a Windows machine for speakers to use. We can accomodate PDF, Keynote and Powerpoint. Please ensure you have uploaded and tested your talk on the computers prior to your session beginning, or have tested your own laptop/device. All contributed talks are 15 minutes plus 5 minutes for questions, while invited review talks are 30 minutes plus 10 minutes for questions. Session chairs will give appropriate warnings when you are approaching your time limit. To ensure the smooth running of each session, please keep to time. Thank you! Information for Posters Posters are allocated a numbered board based on the session to which they've been allocated. -
Naming the Extrasolar Planets
Naming the extrasolar planets W. Lyra Max Planck Institute for Astronomy, K¨onigstuhl 17, 69177, Heidelberg, Germany [email protected] Abstract and OGLE-TR-182 b, which does not help educators convey the message that these planets are quite similar to Jupiter. Extrasolar planets are not named and are referred to only In stark contrast, the sentence“planet Apollo is a gas giant by their assigned scientific designation. The reason given like Jupiter” is heavily - yet invisibly - coated with Coper- by the IAU to not name the planets is that it is consid- nicanism. ered impractical as planets are expected to be common. I One reason given by the IAU for not considering naming advance some reasons as to why this logic is flawed, and sug- the extrasolar planets is that it is a task deemed impractical. gest names for the 403 extrasolar planet candidates known One source is quoted as having said “if planets are found to as of Oct 2009. The names follow a scheme of association occur very frequently in the Universe, a system of individual with the constellation that the host star pertains to, and names for planets might well rapidly be found equally im- therefore are mostly drawn from Roman-Greek mythology. practicable as it is for stars, as planet discoveries progress.” Other mythologies may also be used given that a suitable 1. This leads to a second argument. It is indeed impractical association is established. to name all stars. But some stars are named nonetheless. In fact, all other classes of astronomical bodies are named. -
Exodata: a Python Package to Handle Large Exoplanet Catalogue Data
ExoData: A Python package to handle large exoplanet catalogue data Ryan Varley Department of Physics & Astronomy, University College London 132 Hampstead Road, London, NW1 2PS, United Kingdom [email protected] Abstract Exoplanet science often involves using the system parameters of real exoplanets for tasks such as simulations, fitting routines, and target selection for proposals. Several exoplanet catalogues are already well established but often lack a version history and code friendly interfaces. Software that bridges the barrier between the catalogues and code enables users to improve the specific repeatability of results by facilitating the retrieval of exact system parameters used in an arti- cles results along with unifying the equations and software used. As exoplanet science moves towards large data, gone are the days where researchers can recall the current population from memory. An interface able to query the population now becomes invaluable for target selection and population analysis. ExoData is a Python interface and exploratory analysis tool for the Open Exoplanet Cata- logue. It allows the loading of exoplanet systems into Python as objects (Planet, Star, Binary etc) from which common orbital and system equations can be calculated and measured parame- ters retrieved. This allows researchers to use tested code of the common equations they require (with units) and provides a large science input catalogue of planets for easy plotting and use in research. Advanced querying of targets are possible using the database and Python programming language. ExoData is also able to parse spectral types and fill in missing parameters according to programmable specifications and equations. Examples of use cases are integration of equations into data reduction pipelines, selecting planets for observing proposals and as an input catalogue to large scale simulation and analysis of planets. -
Bondi-Hoyle Accretion
A Review of Bondi–Hoyle–Lyttleton Accretion Richard Edgar a aStockholms observatorium, AlbaNova universitetscentrum, SE-106 91, Stockholm, Sweden Abstract If a point mass moves through a uniform gas cloud, at what rate does it accrete ma- terial? This is the question studied by Bondi, Hoyle and Lyttleton. This paper draws together the work performed in this area since the problem was first studied. Time has shown that, despite the simplifications made, Bondi, Hoyle and Lyttleton made quite accurate predictions for the accretion rate. Bondi–Hoyle–Lyttleton accretion has found application in many fields of astronomy, and these are also discussed. Key words: accretion PACS: 95.30.Lz, 97.10.Gz, 98.35.Mp, 98.62.Mw 1 Introduction arXiv:astro-ph/0406166v2 21 Jun 2004 In its purest form, Bondi–Hoyle–Lyttleton accretion concerns the supersonic motion of a point mass through a gas cloud. The cloud is assumed to be free of self-gravity, and to be uniform at infinity. Gravity focuses material behind the point mass, which can then accrete some of the gas. This problem has found applications in many areas of astronomy, and this paper is an attempt to address the lack of a general review of the subject. I start with a short summary of the original work of Bondi, Hoyle and Lyt- tleton, followed by a discussion of the numerical simulations performed. Some issues in Bondi–Hoyle–Lyttleton accretion are discussed, before a brief sum- mary of the fields in which the geometry has proved useful. Email address: [email protected] (Richard Edgar). -
10. Scientific Programme 10.1
10. SCIENTIFIC PROGRAMME 10.1. OVERVIEW (a) Invited Discourses Plenary Hall B 18:00-19:30 ID1 “The Zoo of Galaxies” Karen Masters, University of Portsmouth, UK Monday, 20 August ID2 “Supernovae, the Accelerating Cosmos, and Dark Energy” Brian Schmidt, ANU, Australia Wednesday, 22 August ID3 “The Herschel View of Star Formation” Philippe André, CEA Saclay, France Wednesday, 29 August ID4 “Past, Present and Future of Chinese Astronomy” Cheng Fang, Nanjing University, China Nanjing Thursday, 30 August (b) Plenary Symposium Review Talks Plenary Hall B (B) 8:30-10:00 Or Rooms 309A+B (3) IAUS 288 Astrophysics from Antarctica John Storey (3) Mon. 20 IAUS 289 The Cosmic Distance Scale: Past, Present and Future Wendy Freedman (3) Mon. 27 IAUS 290 Probing General Relativity using Accreting Black Holes Andy Fabian (B) Wed. 22 IAUS 291 Pulsars are Cool – seriously Scott Ransom (3) Thu. 23 Magnetars: neutron stars with magnetic storms Nanda Rea (3) Thu. 23 Probing Gravitation with Pulsars Michael Kremer (3) Thu. 23 IAUS 292 From Gas to Stars over Cosmic Time Mordacai-Mark Mac Low (B) Tue. 21 IAUS 293 The Kepler Mission: NASA’s ExoEarth Census Natalie Batalha (3) Tue. 28 IAUS 294 The Origin and Evolution of Cosmic Magnetism Bryan Gaensler (B) Wed. 29 IAUS 295 Black Holes in Galaxies John Kormendy (B) Thu. 30 (c) Symposia - Week 1 IAUS 288 Astrophysics from Antartica IAUS 290 Accretion on all scales IAUS 291 Neutron Stars and Pulsars IAUS 292 Molecular gas, Dust, and Star Formation in Galaxies (d) Symposia –Week 2 IAUS 289 Advancing the Physics of Cosmic -
Information Bulletin on Variable Stars
COMMISSIONS AND OF THE I A U INFORMATION BULLETIN ON VARIABLE STARS Nos November July EDITORS L SZABADOS K OLAH TECHNICAL EDITOR A HOLL TYPESETTING K ORI ADMINISTRATION Zs KOVARI EDITORIAL BOARD L A BALONA M BREGER E BUDDING M deGROOT E GUINAN D S HALL P HARMANEC M JERZYKIEWICZ K C LEUNG M RODONO N N SAMUS J SMAK C STERKEN Chair H BUDAPEST XI I Box HUNGARY URL httpwwwkonkolyhuIBVSIBVShtml HU ISSN COPYRIGHT NOTICE IBVS is published on b ehalf of the th and nd Commissions of the IAU by the Konkoly Observatory Budap est Hungary Individual issues could b e downloaded for scientic and educational purp oses free of charge Bibliographic information of the recent issues could b e entered to indexing sys tems No IBVS issues may b e stored in a public retrieval system in any form or by any means electronic or otherwise without the prior written p ermission of the publishers Prior written p ermission of the publishers is required for entering IBVS issues to an electronic indexing or bibliographic system to o CONTENTS C STERKEN A JONES B VOS I ZEGELAAR AM van GENDEREN M de GROOT On the Cyclicity of the S Dor Phases in AG Carinae ::::::::::::::::::::::::::::::::::::::::::::::::::: : J BOROVICKA L SAROUNOVA The Period and Lightcurve of NSV ::::::::::::::::::::::::::::::::::::::::::::::::::: :::::::::::::: W LILLER AF JONES A New Very Long Period Variable Star in Norma ::::::::::::::::::::::::::::::::::::::::::::::::::: :::::::::::::::: EA KARITSKAYA VP GORANSKIJ Unusual Fading of V Cygni Cyg X in Early November ::::::::::::::::::::::::::::::::::::::: -
The Star Clusters Young & Old Newsletter
SCYON The Star Clusters Young & Old Newsletter edited by Holger Baumgardt and Ernst Paunzen SCYON can be found at URL: http://www.univie.ac.at/scyon/ SCYONIssueNo.54 February28,2012 EDITORIAL This is the 54th issue of the SCYON newsletter. Todays issue contains 14 abstracts from refereed publications and conference proceedings and a summary of Xiaoying Pang’s PhD thesis on the stellar mass function and mass segregation in NGC 3603. We also have conference announcements for a Saas-Fee winter school on star clusters in March, a workshop on young star clusters in Italy in July this year, the MODEST 12 workshop in Kobe in August 2012 and IAU Symposium 239 on cosmic distance scales also in August 2012. We finally have a job offer for a postdoctoral position at the Pontificia Universidad Catolica de Chile. As usual, we would like to thank all who sent us their contributions. Holger Baumgardt and Ernst Paunzen ................................................... ................................................. CONTENTS Editorial .......................................... ...............................................1 SCYON policy ........................................ ...........................................2 Mirror sites ........................................ ..............................................2 Abstract from/submitted to REFEREED JOURNALS ........... ................................3 1. Star Forming Regions ............................... ........................................3 2. Galactic Open Clusters............................ -
Natural Sciences Tripos Part III/Mast Astrophysics Project Booklet 2015-2016
Natural Sciences Tripos Part III/MASt Astrophysics Project Booklet 2015-2016 Editors: George Efstathiou and Judith Moss Version date: 3rd October 2015 CONTENTS # Supervisors Associated UTO Project Title pp 1 William Alston, Michael Parker [Andy Fabian] Probing the inner regions of accreting 1-2 and Andy Fabian blackholes using principle components analysis 2 William Alston, Matt Middleton [Andy Fabian] The high-frequency rms-flux relation in 3-4 and Andy Fabian accreting black holes 3 Amy Bonsor Mark Wyatt Where are the debris discs orbiting first ascent 5-6 giants? 4 Heather Campbell and Simon Gerry Gilmore Early photometric classication of the Gaia 7-8 Hodgkin Science Alerts 5 Andy Casey Gerry Gilmore Understanding the anomalous and rare Fe-rich 9 stars 6 Morgan Fraser Gerry Gilmore Mining public Pan-STARRS data for faint 11-12 extragalactic transients 7 Morgan Fraser Gerry Gilmore Making stars go bang 13-14 8 Gerry Gilmore, Anna Hourihane [Gerry Gilmore] Improving visualisation of time-series and large 15-16 and Clare Worley data sets 9 Paul Hewett and Manda Banerji [Paul Hewett] A search for the “ghost of Lyman-α” in quasar 17-18 outflows 10 Robert Izzard, Christopher Tout [Christopher Tout] Eccentricity in pre-main sequence binary stars 19 and Anna Zytkow 11 Robert Izzard, Christopher Tout [Christopher Tout] Ionizing flux from X-ray binary stars 21 and Anna Zytkow 12 Paula Jofre and Keith Hawkins Gerry Gilmore Three-dimensional Chemical Cartography of the 23-24 Milky Way 13 Paula Jofre, Quentin Kral and [Gerry Gilmore] Towards creating -
THE MAGELLANIC CLOUDS NEWSLETTER an Electronic Publication Dedicated to the Magellanic Clouds, and Astrophysical Phenomena Therein
THE MAGELLANIC CLOUDS NEWSLETTER An electronic publication dedicated to the Magellanic Clouds, and astrophysical phenomena therein No. 104 — 2 April 2010 http://www.astro.keele.ac.uk/MCnews Editor: Jacco van Loon Editorial Dear Colleagues, It is my pleasure to present you the 104th issue of the Magellanic Clouds Newsletter. Marvel at the MAD images of the heart of the Tarantula Nebula’s nest of massive stars, or be amazed by the three (sic!) papers on SN 1987 A alone (plus one about its surrounding field) and the two papers on supernova remnants and their progenitors by Maoz & Badenes (and Draine). The PDF version of this newsletter contains a two-page advertisement for a special issue of the Royal Society’s Philo- sophical Transactions, on the topic of star clusters. There is an attractive discount being offered on buying this book. This issue does not feature a cover picture as no suggestions were received. They remain very welcome for future issues. The next issue is planned to be distributed on the 1st of June 2010. Editorially Yours, Jacco van Loon 1 Refereed Journal Papers VLT-MAD observations of the core of 30 Doradus M.A. Campbell1, C.J. Evans2,1, A.D. Mackey1, M. Gieles3, J. Alves4, J. Ascenso5, N. Bastian6 and A.J. Longmore2 1Institute for Astronomy, The University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK 2UK Astronomy Technology Centre, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UK 3European Southern Observatory, Casilla 19001, Santiago 19, Chile 4Calar Alto Observatory-Centro Astron´omico Hispano-Alem´an, C/ Jes´us Durb´an Rem´on 2-2, 04004 Almeria, Spain 5Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA 6Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, UK We present H- and Ks-band imaging of three fields at the centre of 30 Doradus in the Large Magellanic Cloud, obtained as part of the Science Demonstration programme with the Multi-conjugate Adaptive optics Demonstrator (MAD) at the Very Large Telescope. -
Extrasolar Planet Detection and Characterization with the KELT-North Transit Survey
Extrasolar Planet Detection and Characterization With the KELT-North Transit Survey DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University By Thomas G. Beatty Graduate Program in Astronomy The Ohio State University 2014 Dissertation Committee: Professor B. Scott Gaudi, Advisor Professor Andrew P. Gould Professor Marc H. Pinsonneault Copyright by Thomas G. Beatty 2014 Abstract My dissertation focuses on the detection and characterization of new transiting extrasolar planets from the KELT-North survey, along with a examination of the processes underlying the astrophysical errors in the type of radial velocity measurements necessary to measure exoplanetary masses. Since 2006, the KELT- North transit survey has been collecting wide-angle precision photometry for 20% of the sky using a set of target selection, lightcurve processing, and candidate identification protocols I developed over the winter of 2010-2011. Since our initial set of planet candidates were generated in April 2011, KELT-North has discovered seven new transiting planets, two of which are among the five brightest transiting hot Jupiter systems discovered via a ground-based photometric survey. This highlights one of the main goals of the KELT-North survey: to discover new transiting systems orbiting bright, V< 10, host stars. These systems offer us the best targets for the precision ground- and space-based follow-up observations necessary to measure exoplanetary atmospheres. In September 2012 I demonstrated the atmospheric science enabled by the new KELT planets by observing the secondary eclipses of the brown dwarf KELT-1b with the Spitzer Space Telescope. -
A Likely Planet-Induced Gap in the Disk Around T Cha
MNRAS 000,1{6 (2017) Preprint 29 November 2017 Compiled using MNRAS LATEX style file v3.0 A likely planet-induced gap in the disk around T Cha Nathanial P. Hendler,1? Paola Pinilla,2 Ilaria Pascucci,1;3 Adriana Pohl,4;5 Gijs Mulders,1;3 Thomas Henning,4 Ruobing Dong,2 Cathie Clarke,6 James Owen,7 David Hollenbach8 1Lunar and Planetary Laboratory, The University of Arizona, Tucson, AZ 85721, USA 2Department of Astronomy/Steward Observatory, The University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA 3Earths in Other Solar Systems Team, NASA Nexus for Exoplanet System Science. 4Max Planck Institute for Astronomy, KA}unigstuhl~ 17, D-69117 Heidelberg, Germany 5Heidelberg University, Institute of Theoretical Astrophysics, Albert-Ueberle-Str. 2, D-69120 Heidelberg, Germany 6Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, United Kingdom 7Institute for Advanced Study, Einstein Drive, Princeton, NJ 08540, USA 8SETI Institute, Mountain View, CA 94043, USA 29 November 2017 ABSTRACT We present high resolution (0:1100 × 0:0600) 3 mm ALMA observations of the highly inclined transition disk around the star T Cha. Our continuum image reveals multiple dust structures: an inner disk, a spatially resolved dust gap, and an outer ring. When fitting sky-brightness models to the real component of the 3 mm visibilities, we infer that the inner emission is compact (≤ 1 au in radius), the gap width is between 18- 28 au, and the emission from the outer ring peaks at ∼ 36 au. We compare our ALMA image with previously published 1.6µm VLT/SPHERE imagery.