Cool Stars 19 Abstract Book
Total Page：16
File Type：pdf, Size：1020Kb
Load more
Recommended publications
-
Adaptive Optics Imaging of Circumstellar Environments
Star Formation at High Angular Resolution IAU Symposium, Vol. 221, 2004 M. G. Burton, R. Jayawardhana & T.L. Bourke, eds. Adaptive Optics Imaging of Circumstellar Environments Daniel Apai, Ilaria Pascucci, Hongchi Wang, Wolfgang Brandner and Thomas Henning Max Planck Institute for Astronomy, Kimiqsiuhl 17., Heidelberg, Germany D-69117 Carol Grady NOAO/STIS, Goddard Space Flight Center, Code 681, NASA/GSFC, Greenbelt, MD 20771, USA Dan Potter Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, USA Abstract. We present results from our high-resolution, high-contrast imaging campaign targeting the circumstellar environments of young, nearby stars of different masses. The observations have been conducted using the ALFA/CA 3.5m and NACO UT4/VLT adaptive optics systems. In order to enhance the contrast we applied the methods PSF-subtraction and polarimetric differential imaging (PDI). The observations of young stars yielded the identification of numerous new companion candidates, the most interesting one being rv 0.5" from FU Ori. We also obtained high-resolution near-infrared imaging of the circumstellar envelope of SU Aur and AB Aur. Our PDI of the TW Hya circumstellar disk traced back the disk emission as close as 0.1" ~ 6 AU from the star, the closest yet. Our results demonstrate the potential of the adaptive optics systems in achieving high-resolution and high-contrast imaging and thus in the study of circumstellar disks, envelopes and companions. 1. Introduction Young, nearby stars are our prime source of information to study the circum- stellar disk structure and evolution. They are also the ideal targets for adaptive optics (AO) observations, as they are usually bright enough to provide excellent wavefront reference. -
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. -
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. -
CURRICULUM VITAE for DANIEL APAI Research Interests: Extrasolar Planets; Planet Formation; Planetary Atmospheres; Astrobiology; Space Telescope Architectures
CURRICULUM VITAE FOR DANIEL APAI Research Interests: Extrasolar Planets; Planet formation; Planetary atmospheres; Astrobiology; Space telescope architectures Professional Appointments 2017 – Associate Professor, Depts. of Astronomy and Planetary Sciences, Univ. of Arizona 2011 – 2017 Assistant Professor, Depts. of Astronomy and Planetary Sciences, Univ. Arizona 2008 – 2011 Assistant Astronomer, Space Telescope Science Institute Education 2004 PhD, University of Heidelberg and Max Planck Institute of Astronomy 2000 MSc in Physics, University of Szeged Recent International Service: Chair, HST–TESS Advisory Committee, Space Telescope Science Institute Science Advisory Committee member, Giant Magellan Telescope Executive Committee member, NASA Exoplanet Program Analysis Group (EXOPAG) Steering Committee member, NASA Nexus for Exoplanet System Science (NExSS) Chair, Exoplanet Science Questions for Direct Imaging Missions, SAG15/EXOPAG Member, Hubble Space Telescope Financial Review Committee Major Approved Programs as Principal Investigator 9 Hubble Space Telescope + 4 Spitzer Space Telescope programs, including: - Extrasolar Storms: Spitzer Exploration Science Program (1,144 Spitzer hour, 24 HST orbits) - Cloud Atlas: Hubble Space Telescope (112 orbits), 12+ refereed papers Earths in Other Solar Systems: $5.7M program (R&A), 45-member team, 140 refereed papers Nautilus: A large-aperture space telescope for a biosignature survey based on diffractive optics, Co-PI of $1.1M Gordon & Betty Moore Foundation grant Advising/Mentoring: Postdoc. Researchers -
The Exoplanet-Host Star Ι Horologii: an Evaporated Member of the Primordial Hyades Cluster
A&A 482, L5–L8 (2008) Astronomy DOI: 10.1051/0004-6361:20079342 & c ESO 2008 Astrophysics Letter to the Editor The exoplanet-host star ι Horologii: an evaporated member of the primordial Hyades cluster S. Vauclair1,M.Laymand1, F. Bouchy2, G. Vauclair1,A.HuiBonHoa1, S. Charpinet1, and M. Bazot3 1 Laboratoire d’Astrophysique de Toulouse-Tarbes, CNRS, Université de Toulouse, 14 Av. Ed. Belin, 31400 Toulouse, France e-mail: [email protected] 2 Institut d’Astrophysique de Paris, 75014 Paris, France 3 Centro de Astrophysica da Universidade do Porto, Porto, Portugal Received 30 December 2007 / Accepted 4 March 2008 ABSTRACT Aims. We show that the exoplanet-host star iota Horologii, alias HD 17051, which belongs to the so-called Hyades stream, was formed within the primordial Hyades stellar cluster and has evaporated towards its present location, 40 pc away. Methods. This result has been obtained unambiguously by studying the acoustic oscillations of this star, using the HARPS spectrom- eter in La Silla Observatory (ESO, Chili). Results. Besides the fact that ι Hor belongs to the Hyades stream, we give evidence that it has the same metallicity, helium abun- dance, and age as the other stars of the Hyades cluster. They were formed together, at the same time, in the same primordial cloud. Conclusions. This result has strong implications for theories of stellar formation. It also indicates that the observed overmetallicity of this exoplanet-host star, about twice that of the Sun, is original and not caused by planet accretion during the formation of the planetary system. Key words. -
Résumés / Abstract
RENCONTRE ANNUELLE DU CRAQ 2016 Auberge Estrimont, Orford, 19{21 avril 2016 Organisateurs / Organizers Lorne Nelson (Bishop's University) et Martin Aub´e(C´egepde Sherbrooke) R´esum´es/ Abstract LISTE DES PARTICIPANTS / ATTENDEES LIST Nom Institution Contribution (Invit´ee/Orale/Affiche) Lo¨ıcAlbert Universit´ede Montr´eal Orale Genevi`eve Arboit Universit´ede Montr´eal - Etienne Artigau Universit´ede Montr´eal Orale Martin Aub´e C´egepde Sherbrooke - Roxane Barnab´e Universit´ede Montr´eal Orale Fr´ederiqueBaron Universit´ede Montr´eal Orale Patrice Beaudoin Universit´ede Montr´eal Orale Pierre Bergeron Universit´ede Montr´eal Orale F´elixBlais Universit´eLaval - Julie Bolduc-Duval A la d´ecouverte de l'Univers Orale Anne Boucher Universit´ede Montr´eal Orale Etienne Bourbeau Universit´eMcGill Orale Daniel Capellupo Universit´eMcGill - Christian Carles Universit´eLaval Orale Pierre Chastenay UQAM Orale Wen-Jian Chung Bishop's University - Benoit C^ot´e University of Victoria - Simon Coud´e Universit´ede Montr´eal Orale Andrew Cumming Universit´eMcGill - Antoine Darveau-Bernier Universit´ede Montr´eal Orale Matt Dobbs Universit´eMcGill - Ren´eDoyon Universit´ede Montr´eal - Mike Duchesne Universit´eLaval Orale Patrick Dufour Universit´ede Montr´eal - Michael Eby Bishop's University - Mariam El-Amine Bishop's University - Gilles Fontaine Universit´ede Montr´eal - Jo¨elGaudreault C´egepde Sherbrooke - Marie-Lou Gendron-Marsolais Universit´ede Montr´eal Orale Cynthia Genest-Beaulieu Universit´ede Montr´eal - 1 Fran¸coisHardy Universit´ede -
Peter Plavchan
Peter Plavchan Assistant Professor of Astronomy Associate Director, George Mason Observatory PI, EarthFinder NASA Mission Concept Study PI, Astrophysics of Exoplanets Instrumentation Lab Co-PI, MINERVA-Australis Department of Physics & Astronomy Office: (703) 903-5893 George Mason University Cell: (626) 234-1628 Planetary Hall 263 Fax: (703) 993-1269 4400 University Dr, MS 3F3 [email protected] Fairfax, VA 22030 http://exo.gmu.edu twitter:@PlavchanPeter Education University of California, Los Angeles, Los Angeles, CA 2001-2006 MS, PhD in Physics California Institute of Technology, Pasadena, CA 1996-2001 BS in Physics, with honor Awards & Honors College of Science Excellence in Mentoring award nomination 2019 College of Natural and Applied Sciences Research Award, MSU 2017 NASA Group Achievement Award 2017 Citation: For the development and tests at Mauna Kea observatories of a near-infrared Laser Frequency Comb as a wavelength standard for the detection and characterization of exoplanets. NASA Honor Achievement Award, NASA Exoplanet Archive Team 2014 Citation: For outstanding achievement in the rapid and on-budget launch of the NASA Exoplanet Archive NASA Honor Achievement Award, Spitzer Science In-Reach Team 2010 Citation: For outstanding support of Spitzer IRAC Warm Instrument Characterization and significant contributions to NASA and JPL commitments to education of the global community. UCLA Physics Division Fellowship 2001-2006 Kobe International School of Planetary Sciences Fellowship 2005 Astronomy Department Outstanding Teaching -
Business Unit Newsflash
No.2 2017 PDC Center for High Performance Computing Business Unit Newsflash Welcome to the PDC Business Newsflash! The newsflashes are issued in the PDC newsletters or via the PDC business email list in accordance with the frequency of PDC business events. Here you will find short articles about industrial collaborations with PDC and about business events relevant for high performance computing (HPC), along with overviews of important developments and trends in relation to HPC for small to medium-sized enterprises (SMEs) and large industries all around the world. PDC Business Unit Newsflash | No. 2 – 2017 Page 1 HPC for Industry R&D PRACE Opens its Doors Further for Industry from world-leading research conducted over the last decade by a team of researchers at the KTH Royal Institute of Technology in Stockholm. Their project, called “Automatic generation and optimization of meshes for industrial CFD”, started on the 1st of September 2017 and will continue for one year. In early 2017 PRACE opened up a new opportunity for business and industrial partners to apply for both HPC resources and PRACE expert-help through what are known as Type-D PRACE Preparatory Access (PA Type-D) Meanwhile other Swedish SMEs continue to be applications. The objective of this was to allow active within the PRACE SHAPE programme. For PRACE users to optimise, scale and test codes on example, the Swedish SME Svenska Flygtekniska PRACE systems. Type-D offers users the chance Institutet AB was successful with an application to start optimization work on a PRACE Tier-1 called “AdaptiveRotor”. The project is expected system (that is, a national system) to eventually to start soon and will last six months. -
Abstracts Connecting to the Boston University Network
20th Cambridge Workshop: Cool Stars, Stellar Systems, and the Sun July 29 - Aug 3, 2018 Boston / Cambridge, USA Abstracts Connecting to the Boston University Network 1. Select network ”BU Guest (unencrypted)” 2. Once connected, open a web browser and try to navigate to a website. You should be redirected to https://safeconnect.bu.edu:9443 for registration. If the page does not automatically redirect, go to bu.edu to be brought to the login page. 3. Enter the login information: Guest Username: CoolStars20 Password: CoolStars20 Click to accept the conditions then log in. ii Foreword Our story starts on January 31, 1980 when a small group of about 50 astronomers came to- gether, organized by Andrea Dupree, to discuss the results from the new high-energy satel- lites IUE and Einstein. Called “Cool Stars, Stellar Systems, and the Sun,” the meeting empha- sized the solar stellar connection and focused discussion on “several topics … in which the similarity is manifest: the structures of chromospheres and coronae, stellar activity, and the phenomena of mass loss,” according to the preface of the resulting, “Special Report of the Smithsonian Astrophysical Observatory.” We could easily have chosen the same topics for this meeting. Over the summer of 1980, the group met again in Bonas, France and then back in Cambridge in 1981. Nearly 40 years on, I am comfortable saying these workshops have evolved to be the premier conference series for cool star research. Cool Stars has been held largely biennially, alternating between North America and Europe. Over that time, the field of stellar astro- physics has been upended several times, first by results from Hubble, then ROSAT, then Keck and other large aperture ground-based adaptive optics telescopes. -
Named Units of Measurement
Dr. John Andraos, http://www.careerchem.com/NAMED/Named-Units.pdf 1 NAMED UNITS OF MEASUREMENT © Dr. John Andraos, 2000 - 2013 Department of Chemistry, York University 4700 Keele Street, Toronto, ONTARIO M3J 1P3, CANADA For suggestions, corrections, additional information, and comments please send e-mails to [email protected] http://www.chem.yorku.ca/NAMED/ Atomic mass unit (u, Da) John Dalton 6 September 1766 - 27 July 1844 British, b. Eaglesfield, near Cockermouth, Cumberland, England Dalton (1/12th mass of C12 atom) Dalton's atomic theory Dalton, J., A New System of Chemical Philosophy , R. Bickerstaff: London, 1808 - 1827. Biographical References: Daintith, J.; Mitchell, S.; Tootill, E.; Gjersten, D ., Biographical Encyclopedia of Dr. John Andraos, http://www.careerchem.com/NAMED/Named-Units.pdf 2 Scientists , Institute of Physics Publishing: Bristol, UK, 1994 Farber, Eduard (ed.), Great Chemists , Interscience Publishers: New York, 1961 Maurer, James F. (ed.) Concise Dictionary of Scientific Biography , Charles Scribner's Sons: New York, 1981 Abbott, David (ed.), The Biographical Dictionary of Scientists: Chemists , Peter Bedrick Books: New York, 1983 Partington, J.R., A History of Chemistry , Vol. III, Macmillan and Co., Ltd.: London, 1962, p. 755 Greenaway, F. Endeavour 1966 , 25 , 73 Proc. Roy. Soc. London 1844 , 60 , 528-530 Thackray, A. in Gillispie, Charles Coulston (ed.), Dictionary of Scientific Biography , Charles Scribner & Sons: New York, 1973, Vol. 3, 573 Clarification on symbols used: personal communication on April 26, 2013 from Prof. O. David Sparkman, Pacific Mass Spectrometry Facility, University of the Pacific, Stockton, CA. Capacitance (Farads, F) Michael Faraday 22 September 1791 - 25 August 1867 British, b. -
Hubble Space Telescope Primer for Cycle 18
January 2010 Hubble Space Telescope Primer for Cycle 18 An Introduction to HST for Phase I Proposers Space Telescope Science Institute 3700 San Martin Drive Baltimore, Maryland 21218 [email protected] Operated by the Association of Universities for Research in Astronomy, Inc., for the National Aeronautics and Space Administration How to Get Started If you are interested in submitting an HST proposal, then proceed as follows: • Visit the Cycle 18 Announcement Web page: http://www.stsci.edu/hst/proposing/docs/cycle18announce Then continue by following the procedure outlined in the Phase I Roadmap available at: http://apst.stsci.edu/apt/external/help/roadmap1.html More technical documentation, such as that provided in the Instrument Handbooks, can be accessed from: http://www.stsci.edu/hst/HST_overview/documents Where to Get Help • Visit STScI’s Web site at: http://www.stsci.edu • Contact the STScI Help Desk. Either send e-mail to [email protected] or call 1-800-544-8125; from outside the United States and Canada, call [1] 410-338-1082. The HST Primer for Cycle 18 was edited by Francesca R. Boffi, with the technical assistance of Susan Rose and the contributions of many others from STScI, in particular Alessandra Aloisi, Daniel Apai, Todd Boroson, Brett Blacker, Stefano Casertano, Ron Downes, Rodger Doxsey, David Golimowski, Al Holm, Helmut Jenkner, Jason Kalirai, Tony Keyes, Anton Koekemoer, Jerry Kriss, Matt Lallo, Karen Levay, John MacKenty, Jennifer Mack, Aparna Maybhate, Ed Nelan, Sami-Matias Niemi, Cheryl Pavlovsky, Karla Peterson, Larry Petro, Charles Proffitt, Neill Reid, Merle Reinhart, Ken Sembach, Paula Sessa, Nancy Silbermann, Linda Smith, Dave Soderblom, Denise Taylor, Nolan Walborn, Alan Welty, Bill Workman and Jim Younger. -
The Pseudoscience of Anti-Anti-Ufology
SI Sept/Oct 2009 pgs 7/29/09 11:24 AM Page 28 PSYCHIC VIBRATIONS ROBERT SHEAFFER The Pseudoscience of Anti-Anti-UFOlogy Many readers are surely familiar with is more their style. Deception is the practiced prestidigitation can never be author and pro-UFO lecturer Stanton T. name of the game.” trusted in anything. He criticizes Friedman, who calls himself the “Flying Friedman goes on to name names: Nickell for raising “the baseless Project Saucer physicist” because he actually did He critiques Joe Nickell’s article “Return Mogul explanation” for Roswell, which work in physics about fifty years ago (al- cannot be correct, says Friedman, though not since). Well, Stanton is upset because it does not match the claims by the skeptical writings contained in made in later years by alleged Roswell SI’s special issue on UFOs (January- witnesses (although it does match quite /February 2009) and elsewhere. He has well the account of Mac Brazel, the orig- written two papers thus far denouncing inal witness, given in 1947). us, and it is the subject of his Keynote He moves on to my critique of the Address at the MUFON Conference in Betty and Barney Hill case, where I note August. the resemblance of their “hypnosis UFO In February, Friedman wrote an arti- testimony” to Betty Hill’s post-incident cle, “Debunkers at it Again,” reviewing dreams. I wrote, “Barney had heard her our UFO special issue (www.theufo repeat [them] many times,” which he chronicles.com/2009/02/debunkers-at- claims is “nonsense.” According to it-again.html).