CURRICULUM VITAE - Michael J
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
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. -
Daniel Huber
Asteroseismology & Exoplanets: A Kepler Success Story Daniel Huber SETI Institute / NASA Ames Research Center U Chicago Astronomy Colloquium April 2014 Collaborators Bill Chaplin, Andrea Miglio, Yvonne Elsworth, Tiago Campante & Rasmus Handberg (Birmingham) Jørgen Christensen-Dalsgaard, Hans Kjeldsen, Victor Silva Aguirre (Aarhus) Tim Bedding & Dennis Stello (Sydney) Ron Gilliland (PSU), Sarbani Basu (Yale), Steve Kawaler (Iowa State), Travis Metcalfe (SSI), Jaymie Matthews (UBC), Saskia Hekker (Amsterdam), Marc Pinsonneault & Jennifer Johnson (OSU), Eric Gaidos (Hawaii) Tom Barclay, Jason Rowe, Elisa Quintana & Jack Lissauer (NASA Ames / SETI) Josh Carter, Lars Buchhave, Dave Latham, Ben Montet & John Johnson (Harvard) Dan Fabrycky (Chicago) Josh Winn, Kat Deck & Roberto Sanchis-Ojeda (MIT) Andrew Howard, Howard Isaacson & Geoff Marcy (Hawaii, Berkeley) The Kepler Space Telescope • launched in March 2009 • 0.95 m aperture • 42 CCD’s , 105 sq deg FOV Borucki et al. (2008), Koch et al. (2010) Kepler Field of View Kepler Orbit Kepler obtained uninterrupted high-precision photometry of ~> 150,000 stars for 4 years to search for transiting exoplanets Asteroseismology in a Nutshell AstEroseismology? AstEroseismology? unnamed author, sometime in 1995 What causes stellar oscillations? Oscillations in cool stars are driven by turbulent surface convection (opacity in hot stars) Radial Order n displacement center surface number of nodes from the surface to the center of the star Spherical Degree l l = 0 Spherical Degree l l = 2 l = 0 Δν ~ 135 µHz for the Sun sound speed cs -1 3 1/2 Δν = (2 ∫dr/cs) ∝ (M/R ) (ω = n π c / L!) Ulrich (1986) δν ∝ ∫dcs/dr (Age) δν (individual frequencies) sound speed cs -1 3 1/2 Δν = (2 ∫dr/cs) ∝ (M/R ) (ω = n π c / L!) Ulrich (1986) νmax νmax ~ 3000 µHz for the Sun 0.5 -2 0.5 νmax ∝ νac ∝ g Teff ∝ M R Teff Brown et al. -
Dr. Aaron C. Rizzuto –
CV Aaron Rizzuto 1 Department of Astronomy The University of Texas at Austin T (512) 545 7582 B [email protected] Dr. Aaron C. Rizzuto https://aaronrizzuto23.wixsite.com/draaronrizzuto References A. Prof. Michael Ireland, Australian National University ([email protected]) Prof. Adam Kraus, University of Texas at Austin ([email protected]) A. Prof. Andrew Mann, University of North Carolina at Chapel Hill ([email protected]) Education 2011–2014 Ph.D, Astronomy & Astrophysics, Department of Astronomy, Macquarie University. thesis Characterising the Young Sco-Cen Association advisors A. Prof. Michael Ireland, Dr. Daniel Zucker 2010–2011 B.Sc., Honours Class 1 in Physics, Sydney Institute for Astronomy, University of Sydney. thesis The Membership and Multiplicity of Sco OB2 advisors A. Prof. Michael Ireland, Prof. Peter Tuthill, Dr. Gordon Robertson 2007–2009 B.Sc. (Advanced), Physics & Mathematics, University of Sydney. Employment June 2018– 51 Pegasi b Prize Postdoctoral Fellow, Department of Astronomy, The University of Texas at Austin. advisor A. Prof. Adam Kraus 2016–2018 Postdoctoral Fellow, Department of Astronomy, The University of Texas at Austin. advisor A. Prof. Adam Kraus 2011–2013 Physics Laboratory TA, Macquarie University 2011–2013 1st year Astronomy Marking, Macquarie University Telescope Time and Grants Received Since 2015, I received $1.3M AUD in research funding as a postdoctoral researcher. ≥ 2019 NASA Keck 2019B, 1 night, $14,000 (PI) Dynamical Masses of Young Stars with Non-Redundant Masking 2019 NASA -
Constraints on the Spin Evolution of Young Planetary-Mass Companions Marta L
Constraints on the Spin Evolution of Young Planetary-Mass Companions Marta L. Bryan1, Björn Benneke2, Heather A. Knutson2, Konstantin Batygin2, Brendan P. Bowler3 1Cahill Center for Astronomy and Astrophysics, California Institute of Technology, 1200 East California Boulevard, MC 249-17, Pasadena, CA 91125, USA. 2Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA. 3McDonald Observatory and Department of Astronomy, University of Texas at Austin, Austin, TX 78712, USA. Surveys of young star-forming regions have discovered a growing population of planetary- 1 mass (<13 MJup) companions around young stars . There is an ongoing debate as to whether these companions formed like planets (that is, from the circumstellar disk)2, or if they represent the low-mass tail of the star formation process3. In this study we utilize high-resolution spectroscopy to measure rotation rates of three young (2-300 Myr) planetary-mass companions and combine these measurements with published rotation rates for two additional companions4,5 to provide a look at the spin distribution of these objects. We compare this distribution to complementary rotation rate measurements for six brown dwarfs with masses <20 MJup, and show that these distributions are indistinguishable. This suggests that either that these two populations formed via the same mechanism, or that processes regulating rotation rates are independent of formation mechanism. We find that rotation rates for both populations are well below their break-up velocities and do not evolve significantly during the first few hundred million years after the end of accretion. This suggests that rotation rates are set during late stages of accretion, possibly by interactions with a circumplanetary disk. -
Exoplanet.Eu Catalog Page 1 # Name Mass Star Name
exoplanet.eu_catalog # name mass star_name star_distance star_mass OGLE-2016-BLG-1469L b 13.6 OGLE-2016-BLG-1469L 4500.0 0.048 11 Com b 19.4 11 Com 110.6 2.7 11 Oph b 21 11 Oph 145.0 0.0162 11 UMi b 10.5 11 UMi 119.5 1.8 14 And b 5.33 14 And 76.4 2.2 14 Her b 4.64 14 Her 18.1 0.9 16 Cyg B b 1.68 16 Cyg B 21.4 1.01 18 Del b 10.3 18 Del 73.1 2.3 1RXS 1609 b 14 1RXS1609 145.0 0.73 1SWASP J1407 b 20 1SWASP J1407 133.0 0.9 24 Sex b 1.99 24 Sex 74.8 1.54 24 Sex c 0.86 24 Sex 74.8 1.54 2M 0103-55 (AB) b 13 2M 0103-55 (AB) 47.2 0.4 2M 0122-24 b 20 2M 0122-24 36.0 0.4 2M 0219-39 b 13.9 2M 0219-39 39.4 0.11 2M 0441+23 b 7.5 2M 0441+23 140.0 0.02 2M 0746+20 b 30 2M 0746+20 12.2 0.12 2M 1207-39 24 2M 1207-39 52.4 0.025 2M 1207-39 b 4 2M 1207-39 52.4 0.025 2M 1938+46 b 1.9 2M 1938+46 0.6 2M 2140+16 b 20 2M 2140+16 25.0 0.08 2M 2206-20 b 30 2M 2206-20 26.7 0.13 2M 2236+4751 b 12.5 2M 2236+4751 63.0 0.6 2M J2126-81 b 13.3 TYC 9486-927-1 24.8 0.4 2MASS J11193254 AB 3.7 2MASS J11193254 AB 2MASS J1450-7841 A 40 2MASS J1450-7841 A 75.0 0.04 2MASS J1450-7841 B 40 2MASS J1450-7841 B 75.0 0.04 2MASS J2250+2325 b 30 2MASS J2250+2325 41.5 30 Ari B b 9.88 30 Ari B 39.4 1.22 38 Vir b 4.51 38 Vir 1.18 4 Uma b 7.1 4 Uma 78.5 1.234 42 Dra b 3.88 42 Dra 97.3 0.98 47 Uma b 2.53 47 Uma 14.0 1.03 47 Uma c 0.54 47 Uma 14.0 1.03 47 Uma d 1.64 47 Uma 14.0 1.03 51 Eri b 9.1 51 Eri 29.4 1.75 51 Peg b 0.47 51 Peg 14.7 1.11 55 Cnc b 0.84 55 Cnc 12.3 0.905 55 Cnc c 0.1784 55 Cnc 12.3 0.905 55 Cnc d 3.86 55 Cnc 12.3 0.905 55 Cnc e 0.02547 55 Cnc 12.3 0.905 55 Cnc f 0.1479 55 -
SPACE NEWS Previous Page | Contents | Zoom in | Zoom out | Front Cover | Search Issue | Next Page BEF Mags INTERNATIONAL
Contents | Zoom in | Zoom out For navigation instructions please click here Search Issue | Next Page SPACEAPRIL 19, 2010 NEWSAN IMAGINOVA CORP. NEWSPAPER INTERNATIONAL www.spacenews.com VOLUME 21 ISSUE 16 $4.95 ($7.50 Non-U.S.) PROFILE/22> GARY President’s Revised NASA Plan PAYTON Makes Room for Reworked Orion DEPUTY UNDERSECRETARY FOR SPACE PROGRAMS U.S. AIR FORCE AMY KLAMPER, COLORADO SPRINGS, Colo. .S. President Barack Obama’s revised space plan keeps Lockheed Martin working on a Ulifeboat version of a NASA crew capsule pre- INSIDE THIS ISSUE viously slated for cancellation, potentially positioning the craft to fly astronauts to the interna- tional space station and possibly beyond Earth orbit SATELLITE COMMUNICATIONS on technology demonstration jaunts the president envisions happening in the early 2020s. Firms Complain about Intelsat Practices Between pledging to choose a heavy-lift rocket Four companies that purchase satellite capacity from Intelsat are accusing the large fleet design by 2015 and directing NASA and Denver- operator of anti-competitive practices. See story, page 5 based Lockheed Martin Space Systems to produce a stripped-down version of the Orion crew capsule that would launch unmanned to the space station by Report Spotlights Closed Markets around 2013 to carry astronauts home in an emer- The office of the U.S. Trade Representative has singled out China, India and Mexico for not meet- gency, the White House hopes to address some of the ing commitments to open their domestic satellite services markets. See story, page 13 chief complaints about the plan it unveiled in Feb- ruary to abandon Orion along with the rest of NASA’s Moon-bound Constellation program. -
Astronomers Reveal New Insights Into Physical Properties of the Young Star System Roxs 12 30 August 2017, by Tomasz Nowakowski
Astronomers reveal new insights into physical properties of the young star system ROXs 12 30 August 2017, by Tomasz Nowakowski companion of ROXs 12 A, but very little is known about its physical parameters. Given that ROXs 12 B is separated from ROXs 12 A by more than 100 AU, it makes it one of only a handful of young, very low-mass companions at wide orbital distances from their hosts. Therefore, ROXs 12 B offers a valuable opportunity to study the atmosphere of a young substellar object that occupies the mass range between the heaviest gas giant planets and the lightest stars. In order to get more details about ROXs 12 and its mysterious companion, a team of researchers led by Brendan Bowler of the University of Texas at Austin has conducted moderate-resolution near- infrared spectroscopic observations of ROXs 12 B. For their observational campaign, the astronomers used several spectrographs, including the Near- Infrared Integral Field Spectrometer (NIFS) at Gemini-North 8.1 m telescope in Hawaii, and the Overview of the ROXs 12 triple system. Image credit: OH-Suppressing InfraRed Imaging Spectrograph Bowler et al., 2017. (OSIRIS) at the Keck I telescope, also in Hawaii. These observations allowed the team to carry out a comprehensive analysis of ROXs 12, revealing Astronomers have disclosed new information about more insights about this system. the young star system ROXs 12 as a result of near- infrared spectroscopic observations of one of the "Here we present near-infrared integral-field system's components. The findings, presented spectroscopy of the substellar companion to ROXs Aug. -
A Guide to Star Names, Pronunciations, and Related Constellations
Astronomy Club of Asheville 3 Feb. 2020 version Page 1 of 8 A Guide to Star Names, Pronunciations, and Related Constellations Proper Star Names: There are over 300 proper star names that are used and accepted worldwide today -- and approved by the International Astronomical Union. Most of them come from the ancient Arabic cultures, but there are many star names in common use from the Greek, the Roman, European, and other cultures as well. On the pages below you will find an alphabetical list of many, but not all, of the proper star names, their pronunciations, and related constellations. Find a list of star names by constellation at this web link. Find another list of common star names at this web link. Star Catalogs that are Currently Used by Astronomers 1. Bayer Catalog: This first widely recognized star catalog was published by German astronomer Johann Bayer in 1603. This list of naked-eye stars indexes the stars in each constellation, using the letters of the Greek alphabet, followed by the genitive form of its parent constellation's Latin name, e.g., alpha Orionis. Typically, the brightest star in each constellation received the first Greek letter (alpha), the second brightest star the second letter (beta), and on-and-on. But you will often notice that the Bayer sequencing of the bright stars in the constellations is not true to what we see and know today about their apparent brightness. Original errors in the brightness estimates, along with the brightness variability of the stars (like Betelgeuse in Orion), have caused the Bayer sequencing not to match the stellar brightness that we observe today. -
Symposium on Telescope Science
Proceedings for the 26th Annual Conference of the Society for Astronomical Sciences Symposium on Telescope Science Editors: Brian D. Warner Jerry Foote David A. Kenyon Dale Mais May 22-24, 2007 Northwoods Resort, Big Bear Lake, CA Reprints of Papers Distribution of reprints of papers by any author of a given paper, either before or after the publication of the proceedings is allowed under the following guidelines. 1. The copyright remains with the author(s). 2. Under no circumstances may anyone other than the author(s) of a paper distribute a reprint without the express written permission of all author(s) of the paper. 3. Limited excerpts may be used in a review of the reprint as long as the inclusion of the excerpts is NOT used to make or imply an endorsement by the Society for Astronomical Sciences of any product or service. Notice The preceding “Reprint of Papers” supersedes the one that appeared in the original print version Disclaimer The acceptance of a paper for the SAS proceedings can not be used to imply or infer an endorsement by the Society for Astronomical Sciences of any product, service, or method mentioned in the paper. Published by the Society for Astronomical Sciences, Inc. First printed: May 2007 ISBN: 0-9714693-6-9 Table of Contents Table of Contents PREFACE 7 CONFERENCE SPONSORS 9 Submitted Papers THE OLIN EGGEN PROJECT ARNE HENDEN 13 AMATEUR AND PROFESSIONAL ASTRONOMER COLLABORATION EXOPLANET RESEARCH PROGRAMS AND TECHNIQUES RON BISSINGER 17 EXOPLANET OBSERVING TIPS BRUCE L. GARY 23 STUDY OF CEPHEID VARIABLES AS A JOINT SPECTROSCOPY PROJECT THOMAS C. -
The Agb Newsletter
THE AGB NEWSLETTER An electronic publication dedicated to Asymptotic Giant Branch stars and related phenomena Official publication of the IAU Working Group on Red Giants and Supergiants No. 261 — 1 April 2019 http://www.astro.keele.ac.uk/AGBnews Editors: Jacco van Loon, Ambra Nanni and Albert Zijlstra Figure 1: Planetary nebula MWP1 imaged by Don Goldman, suggested by Sakib Rasool. For more details see https://astrodonimaging.com/gallery/mwp1/. 1 Editorial Dear Colleagues, It is a pleasure to present you the 261st issue of the AGB Newsletter. There’s lots of work on star clusters and extragalactic red (super)giants, but much else too. Looking for a job? Consider applying for the postdoctoral fellowships in Oslo, Norway, or Gothenburg, Sweden (not yet got a Ph.D.? They’ve got an opportunity for you too!), or the position of staff astronomer at ESO in Chile. Hans Olofsson needs no introduction. He’s now provided you with an excuse to spend a few nice days of science and social time in beautiful Sm¨ogen, Sweden. The European Union’s Fizeau interferometry initiative is still going strong, thanks to the diligent leadership of Josef Hron and P´eter Abrah´am.´ So do make use of it and get your hands dirty on the power of interferometry. Last month’s Food for Thought ”Do we need an AGB group on Facebook to have more vivid discussion on the field?” generated a couple of helpful responses. Claudia Paladini pointed us towards an existing (since 2015) Facebook group ”Evolved stars” https://www.facebook.com/groups/evolvedstars/ with well over a hundred members, which has been useful for posting advertisements et cetera but hasn’t generated much active discussion (yet). -
U.S. Naval Observatory Washington, DC 20392-5420 This Report Covers the Period July 2001 Through June Dynamical Astronomy in Order to Meet Future Needs
1 U.S. Naval Observatory Washington, DC 20392-5420 This report covers the period July 2001 through June dynamical astronomy in order to meet future needs. J. 2002. Bangert continued to serve as Department head. I. PERSONNEL A. Civilian Personnel A. Almanacs and Other Publications Marie R. Lukac retired from the Astronomical Appli- cations Department. The Nautical Almanac Office ͑NAO͒, a division of the Scott G. Crane, Lisa Nelson Moreau, Steven E. Peil, and Astronomical Applications Department ͑AA͒, is responsible Alan L. Smith joined the Time Service ͑TS͒ Department. for the printed publications of the Department. S. Howard is Phyllis Cook and Phu Mai departed. Chief of the NAO. The NAO collaborates with Her Majes- Brian Luzum and head James R. Ray left the Earth Ori- ty’s Nautical Almanac Office ͑HMNAO͒ of the United King- entation ͑EO͒ Department. dom to produce The Astronomical Almanac, The Astronomi- Ralph A. Gaume became head of the Astrometry Depart- cal Almanac Online, The Nautical Almanac, The Air ment ͑AD͒ in June 2002. Added to the staff were Trudy Almanac, and Astronomical Phenomena. The two almanac Tillman, Stephanie Potter, and Charles Crawford. In the In- offices meet twice yearly to discuss and agree upon policy, strument Shop, Tie Siemers, formerly a contractor, was hired science, and technical changes to the almanacs, especially to fulltime. Ellis R. Holdenried retired. Also departing were The Astronomical Almanac. Charles Crawford and Brian Pohl. Each almanac edition contains data for 1 year. These pub- William Ketzeback and John Horne left the Flagstaff Sta- lications are now on a well-established production schedule. -
Asteroseismology
Asteroseismology Gerald Handler Copernicus Astronomical Center, Bartycka 18, 00-716 Warsaw, Poland Email: [email protected] Abstract Asteroseismology is the determination of the interior structures of stars by using their oscillations as seismic waves. Simple explanations of the astrophysical background and some basic theoretical considerations needed in this rapidly evolving field are followed by introductions to the most important concepts and methods on the basis of example. Previous and potential applications of asteroseismology are reviewed and future trends are attempted to be foreseen. Introduction: variable and pulsating stars Nearly all the physical processes that determine the structure and evolution of stars occur in their (deep) interiors. The production of nuclear energy that powers stars takes place in their cores for most of their lifetime. The effects of the physical processes that modify the simplest models of stellar evolution, such as mixing and diffusion, also predominantly take place in the inside of stars. The light that we receive from the stars is the main information that astronomers can use to study the universe. However, the light of the stars is radiated away from their surfaces, carrying no memory of its origin in the deep interior. Therefore it would seem that there is no way that the analysis of starlight tells us about the physics going on in the unobservable stellar interiors. However, there are stars that reveal more about themselves than others. Variable stars are objects for which one can observe time-dependent light output, on a time scale shorter arXiv:1205.6407v1 [astro-ph.SR] 29 May 2012 than that of evolutionary changes.