NOAO Hosts “Colors of Nature” Summer Academy
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Sirius Astronomer
September 2015 Free to members, subscriptions $12 for 12 issues Volume 42, Number 9 Jeff Horne created this image of the crater Copernicus on September 13, 2005 from his observing site in Irvine. September 19 is International Observe The Moon Night, so get out there and have a look at a source of light pollution we really don’t mind! OCA MEETING STAR PARTIES COMING UP The free and open club meeng will The Black Star Canyon site will open on The next session of the Beginners be held September 18 at 7:30 PM in September 5. The Anza site will be open on Class will be held at the Heritage Mu‐ the Irvine Lecture Hall of the Hashing‐ September 12. Members are encouraged to seum of Orange County at 3101 West er Science Center at Chapman Univer‐ check the website calendar for the latest Harvard Street in Santa Ana on Sep‐ sity in Orange. This month, JPL’s Dr. updates on star pares and other events. tember 4. The following class will be Dave Doody will discuss the Grand held October 2. Finale of the historic Cassini mission to Please check the website calendar for the Saturn in 2017! outreach events this month! Volunteers are GOTO SIG: TBA always welcome! Astro‐Imagers SIG: Sept. 8, Oct. 13 NEXT MEETINGS: October 9, Novem‐ Remote Telescopes: TBA You are also reminded to check the web ber 13 Astrophysics SIG: Sept. 11, Oct. 16 site frequently for updates to the calendar Dark Sky Group: TBA of events and other club news. -
Chaos in the Inert Oort Cloud
EPSC Abstracts Vol. 13, EPSC-DPS2019-1303-1, 2019 EPSC-DPS Joint Meeting 2019 c Author(s) 2019. CC Attribution 4.0 license. Chaos in the inert Oort cloud Melaine Saillenfest (1), Marc Fouchard (1), and Arika Higuchi (2) (1) IMCCE, Observatoire de Paris, France, (2) RISE Project Office/NAOJ, Mitaka, Tokyo, Japan e-mail: [email protected] µ 16 Abstract 2 εP − εG ÝÖ 14 2 We investigate the orbital dynamics of small bodies in aÙ 9 12 the intermediate regime between the Kuiper belt and − 10 the Oort cloud, i.e. where the planetary perturbations ´ 10 and the galactic tides have the same order of magni- 8 tude. We show that this region is far less inert than it could appear at first sight, despite very weak orbital 6 perturbations. Ô eÖØÙÖbaØiÓÒ 4 Øhe Óf 2 1. Introduction ×iÞe 0 0 500 1000 1500 2000 2500 3000 aÜi× ´aÙµ The orbits of distant trans-Neptunian objects are sub- ×eÑi¹Ña jÓÖ a ject to internal perturbations from the planets, and ex- ternal perturbations from the galactic tides. A distinc- Figure 1: Size of the small parameters appearing in tion is generally made between the Kuiper belt and the the Hamiltonian function (Eq. 1) with respect to the Oort cloud, which are thought to have been initially semi-major axis of the small body. The red curve rep- populated through distinct mechanisms (see e.g. the resents the planetary perturbations, and the blue curve recent review by [4]). However, there is no dynamical represents the galactic tides. boundary between the two populations, and numerical simulations show a continuous transfer of objects in 2. -
Table of Contents
AAS Newsletter November/December 2012, Issue 167 - Published for the Members of the American Astronomical Society Table of Contents 2 President’s Column 23 Committee on Employment 3 From the Executive Office 24 Committee on the Status of Women in 4 On the Waterfront: AAS Returns to Long Astronomy Beach 25 Bringing Sustainability into Your Institution 5 2012 Kavli Lecturers 27 Calendar of Events 7 HAD News 28 Announcements 8 JWST Update 29 United Nations Basic Space Science Initiative 12 Candidate Statements (UNBSSI) 1991-2012 21 News from NSF Division of Astronomical Sciences (AST) Back page Washington News 22 News from the Astronomical Society of the Pacific (ASP) A A S American Astronomical Society President's Column AAS Officers David J. Helfand, President David J. Helfand, [email protected] Debra M. Elmegreen, Past President Nicholas B. Suntzeff, Vice-President Edward B. Churchwell, Vice-President Paula Szkody, Vice-President From close-up pictures of water-sculpted pebbles on Hervey (Peter) Stockman, Treasurer G. Fritz Benedict, Secretary Mars, to the detection of galaxies at the boundary of Anne P. Cowley, Publications Board Chair the Dark Ages, discoveries in our field continue to Edward E. Prather, Education Officer advance our understanding of the Universe and to Councilors fascinate legions of the public who support our inquiry. Bruce Balick Nancy S. Brickhouse Unfortunately, we do not see similar progress in the Eileen D. Friel political sphere, even now that the consequences have Edward F. Guinan been spelled out of allowing budget sequestration to hit Todd J. Henry Steven D. Kawaler every government agency in January. -
NOAO NEWSLETTER from the Office of the Director
Director’s Corner NOAO NEWSLETTER From the Office of the Director .......................................................................................................................................2 ISSUE 118 | OCTOBER 2018 Science Highlights Looking Ahead to Looking Back in Time with DESI ....................................................................................................3 The Dark Energy Survey: The Journey So Far and the Path Forward ......................................................................5 Managing Editor A Reconnaissance of RECONS .......................................................................................................................................8 Sharon Hunt Discovering 12 New Moons Around Jupiter .................................................................................................................9 NOAO Director’s Office Community Science & Data David Silva “More Is Different” in Data-Driven Astronomy ..........................................................................................................11 Data Lab 2.0 Is Bigger and Better ...............................................................................................................................12 Science Highlights The US Extremely Large Telescope Program .............................................................................................................13 Tod R. Lauer “Science and Evolution of Gemini Observatory” Conference ...............................................................................14 -
FY13 High-Level Deliverables
National Optical Astronomy Observatory Fiscal Year Annual Report for FY 2013 (1 October 2012 – 30 September 2013) Submitted to the National Science Foundation Pursuant to Cooperative Support Agreement No. AST-0950945 13 December 2013 Revised 18 September 2014 Contents NOAO MISSION PROFILE .................................................................................................... 1 1 EXECUTIVE SUMMARY ................................................................................................ 2 2 NOAO ACCOMPLISHMENTS ....................................................................................... 4 2.1 Achievements ..................................................................................................... 4 2.2 Status of Vision and Goals ................................................................................. 5 2.2.1 Status of FY13 High-Level Deliverables ............................................ 5 2.2.2 FY13 Planned vs. Actual Spending and Revenues .............................. 8 2.3 Challenges and Their Impacts ............................................................................ 9 3 SCIENTIFIC ACTIVITIES AND FINDINGS .............................................................. 11 3.1 Cerro Tololo Inter-American Observatory ....................................................... 11 3.2 Kitt Peak National Observatory ....................................................................... 14 3.3 Gemini Observatory ........................................................................................ -
Arxiv:1706.07447V1 [Astro-Ph.EP] 22 Jun 2017 Periods
Origin and Evolution of Short-Period Comets David Nesvorn´y1, David Vokrouhlick´y2, Luke Dones1, Harold F. Levison1, Nathan Kaib3, Alessandro Morbidelli4 (1) Department of Space Studies, Southwest Research Institute, 1050 Walnut St., Suite 300, Boulder, CO 80302, USA (2) Institute of Astronomy, Charles University, V Holeˇsoviˇck´ach2, CZ{18000 Prague 8, Czech Republic (3) HL Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK 73019, USA (4) D´epartement Cassiop´ee,University of Nice, CNRS, Observatoire de la C^oted'Azur, Nice, 06304, France ABSTRACT Comets are icy objects that orbitally evolve from the trans-Neptunian region into the inner Solar System, where they are heated by solar radiation and be- come active due to sublimation of water ice. Here we perform simulations in which cometary reservoirs are formed in the early Solar System and evolved over 4.5 Gyr. The gravitational effects of Planet 9 (P9) are included in some sim- ulations. Different models are considered for comets to be active, including a simple assumption that comets remain active for Np(q) perihelion passages with perihelion distance q < 2:5 au. The orbital distribution and number of active comets produced in our model is compared to observations. The orbital distri- bution of ecliptic comets (ECs) is well reproduced in models with Np(2:5) ' 500 and without P9. With P9, the inclination distribution of model ECs is wider than the observed one. We find that the known Halley-type comets (HTCs) have a nearly isotropic inclination distribution. The HTCs appear to be an exten- sion of the population of returning Oort-cloud comets (OCCs) to shorter orbital arXiv:1706.07447v1 [astro-ph.EP] 22 Jun 2017 periods. -
January 2004 Issue of the OSS Voyages Newsletter
COMMITTEE ON THE STATUS OF MINORITIES IN ASTRONOMY J ANUARY 2004 SPECTRUM A report on underrepresented minorities in astronomy INSIDE THIS ISSUE: So… What About 1 So… What About Diversity? Diversity? by Marcel Agueros Professional Organi- 1 zations of Minorities Led by a team of graduate students, the University of in Physical Sciences Washington Astronomy Department has developed a The Accountability 4 departmental plan for more effectively engaging diver- Side of Diversity sity issues through enhanced coordination of effort and improved leveraging of available resources. What’s in a Name? 6 Marcel Agueros describes how they went about it and Astronomy Faculty 9 what they learned along the way. Diversity Survey: Preliminary Results A Small First Step 10 he meeting was over. For nearly an hour the graduate students and the graduate program ad- Ph.D. Productivity of 12 visor had intensively discussed a number of Historically Black T Colleges pressing departmental issues. We were wrapping up Marcel Agueros is a when a question was casually dropped on the table: 4th-year astronomy SASS: Cultivating the 14 “What about diversity?” graduate student at the Next Generation of University of Washing- Astronomers What seemed like a simple enough question to ask ton. His dissertation NASA Space Science 16 turned out to be a very difficult question to answer. That research is on X-ray Diversity Initiatives meeting took place about a year ago, and we are still selected stars from the working our way to a good answer. However, with the RASS and SDSS Sur- Meet Dara Norman at 17 help of some friends—the Graduate Opportunities and veys under the direc- CTIO Minority Achievement Program and ADVANCE here at tion of Scott Anderson. -
ASTRONOMY TAKES to the CLOUD Telescope Users Reveal Six Lessons of Migrating Big Data from Custom Servers to the Cloud
Work / Technology & tools ILLUSTRATION BY THE PROJECT TWINS THE PROJECT BY ILLUSTRATION ASTRONOMY TAKES TO THE CLOUD Telescope users reveal six lessons of migrating big data from custom servers to the cloud. By Charles Q. Choi stronomers typically work by asking 2028. And the next-generation Very Large Array the LSST project from scratch could approach observatories for time on a telescope (ngVLA) will generate hundreds of petabytes US$150 million over 10 years. Instead, they and downloading the resulting annually, roughly 1,000 times more than the — like much of the rest of the astronomy data. But as the amount of data that VLA does today, says Brian Glendenning, assis- community — looked to the cloud. Here are telescopes produce grows, well, tant director for data management and software six lessons from astronomers’ experiences. Aastronomically, old methods can’t keep pace. at the National Radio Astronomy Observatory, The Vera C. Rubin Observatory in Chile is who is based in Albuquerque, New Mexico. Invest in computing power geared up to collect 20 terabytes per night as Such data sets are out of reach for It’s not enough to migrate data to the cloud; part of its 10-year Legacy Survey of Space and conventional workflows: it isn’t feasible to researchers need to be able to interact with Time (LSST), once it becomes operational in download that much data and store them them. “Instead of the traditional model where 2022. That’s as much as the Sloan Digital Sky locally, says Mario Juric, an astronomer at the astronomers brought their data to their Survey — which created the most detailed 3D University of Washington in Seattle. -
Joanna M. Taylor Staff Scientist II, Science Support
Joanna M. Taylor Staff Scientist II, Science Support Space Telescope Science Institute 3700 San Martin Drive Baltimore, MD 21218 (410) 338-4501 [email protected] http://www.stsci.edu/~jotaylor EMPLOYMENT JWST/NIRISS branch 2018-present (STScI) HST/COS branch 2016-2018 HST/COS+STIS combined branch 2012-2016 EDUCATION Indiana University; Bloomington, IN 2012 B.S. in Astronomy/Astrophysics and Physics Minors in Mathematics and Italian ULLYSES ULLYSES Data Team Lead Aug 2020-present ULLYSES Data Team Deputy Mar-Aug 2020 ULLYSES Data Products and Technical Implementation 2019-2020 JWST/NIRISS WFSS Team 2018-present Pipeline Testing 2018-present JWST Slitless Spectroscopy Master Class Instructor 2019 USER SUPPORT NIRISS Help Desk Agent 2018-present Triage Help Desk Lead 2015-2018 COS and FOS Help Desk Lead 2016-2018 COS and FOS Help Desk Agent 2012-2018 STIS and GHRS Help Desk Agent 2012-2016 Triage Help Desk Agent 2013-2015 HST/COS COS Data Retrieval and Monitoring (COSMO project) 2012-2018, 2020 Pipeline Block Lead 2016-2018 ETC Lead 2016-2018 NUV TDS Analysis 2013-2018 OPUS/DP Build Testing 2012-2018 FUV LP4 Support 2016-2017 Pipeline Block Deputy 2014-2016 FUV Hotspot Analysis 2015 FUV LP3 Support 2014-2015 COS LSF Generation with Code V 2014 HST/STIS Pipeline Block Deputy 2014-2016 STIS CCD Performance Monitoring 2013-2016 STIS CCD Dark Monitoring 2013-2016 STIS CCD Bias and Readnoise Monitoring 2013-2016 STIS CCD Annealing Monitoring 2013-2016 CalSTIS Testing 2012-2013 OPUS Build Testing 2013 MISC. Spectroscopy Code Review Chair 2015-present INS New Hire Trainer 2013-2018 ReDCaT Team (formerly CRDS/CDBS team) 2012-2016 HST TAC Panel Support Scientist 2013 RESEARCH An Optimized COS Background Correction 2020-present SUPPORT With Drs. -
CFAS Astropicture of the Month
1 What object has the furthest known orbit in our Solar System? In terms of how close it will ever get to the Sun, the new answer is 2012 VP113, an object currently over twice the distance of Pluto from the Sun. Pictured above is a series of discovery images taken with the Dark Energy Camera attached to the NOAO's Blanco 4-meter Telescope in Chile in 2012 and released last week. The distant object, seen moving on the lower right, is thought to be a dwarf planet like Pluto. Previously, the furthest known dwarf planet was Sedna, discovered in 2003. Given how little of the sky was searched, it is likely that as many as 1,000 more objects like 2012 VP113 exist in the outer Solar System. 2012 VP113 is currently near its closest approach to the Sun, in about 2,000 years it will be over five times further. Some scientists hypothesize that the reason why objects like Sedna and 2012 VP113 have their present orbits is because they were gravitationally scattered there by a much larger object -- possibly a very distant undiscovered planet. Orbital Data: JDAphelion 449 ± 14 AU (Q) Perihelion 80.5 ± 0.6 AU (q) Semi-major axis 264 ± 8.3 AU (a) Eccentricity 0.696 ± 0.011 Orbital period4313 ± 204 yr 2 Discovery images taken on November 5, 2012. A merger of three discovery images, the red, green and blue dots on the image represent 2012 VP113's location on each of the images, taken two hours apart from each other. 2012 VP113, also written 2012 VP113, is the detached object in the Solar System with the largest known perihelion (closest approach to the Sun) -
11000 Scientists Around the World Have the Final Say on What's a Planet
International Astronomical Union (IAU) members vote on a new planet definition during a meeting in Prague Aug. 24, 2006. The vote redefined Pluto as a dwarf planet. MICHAL CIZEK/AFP/GETTY IMAGES DEFINITION: PLANET 11,000 scientists around the world have the final say on what’s a planet — or not By Mary Helen Berg a planet is a planet or just an orbiting ice of planetary scientists, academics and ball. Right now, the worlds that make historians support research, confirm HE NUMBER OF PLANETS IN OUR the cut are Mercury, Venus, Earth, Mars, celestial discoveries, document and solar system is … well, it depends Jupiter, Saturn, Uranus and Neptune. preserve data and even track potentially on who you ask. Pluto fans, sporting The IAU is “responsible for managing the dangerous asteroids. T-shirts that read “Never Forget,” astronomical world,” said Gareth Williams, Tstill say there are nine. Meanwhile, some associate director of the NASA-funded IAU PLUTO OUT astronomers say the tally should be 13. But Minor Planet Center (MPC). “They define Most of these working groups fly under the arbiter on all things astronomical, the everything that astronomers need to talk the radar. But in 2006, one committee International Astronomical Union (IAU), about objects in a consistent way. So, if I’m found itself under global scrutiny when, for recognizes only eight planets. talking about an object at a certain point the first time, the astronomy community As the world’s largest professional in the sky, some other astronomer knows demanded an official definition of “planet.” organization for astronomers, the IAU exactly what I am talking about.” The seven-member Planet Definition represents 11,000 scientists from 95 In other words, the IAU controls cosmic countries and has the final say on whether chaos on Earth. -
Observational Constraints on Planet Nine: Astrometry of Pluto and Other
Observational Constraints on Planet Nine : Astrometry of Pluto and Other Trans-Neptunian Objects Matthew J. Holman and Matthew J. Payne Harvard-Smithsonian Center for Astrophysics, 60 Garden St., MS 51, Cambridge, MA 02138, USA [email protected], [email protected], [email protected] ABSTRACT We use astrometry of Pluto and other TNOs to constrain the sky location, distance, and mass of the possible additional planet (Planet Nine ) hypothesized by Batygin and Brown (2016). We find that over broad regions of the sky the inclusion of a massive, distant planet degrades the fits to the observations. However, in other regions, the fits are significantly improved by the addition of such a planet. Our best fits suggest a planet that is either more massive or closer than argued for by Batygin and Brown (2016) based on the orbital distribution of distant trans-neptunian objects (or by Fienga et al. (2016) based on range measured to the Cassini spacecraft). The trend to favor larger and closer perturbing planets is driven by the residuals to the astrometry of Pluto, remeasured from photographic plates using modern stellar catalogs (Buie and Folkner 2015), which show a clear trend in declination, over the course of two decades, that drive a preference for large perturbations. Although this trend may be the result of systematic errors of unknown origin in the observations, a possible resolution is that the declination trend may be due to perturbations from a body, additional to Planet Nine , that is closer to Pluto, but less massive than, Planet Nine . Subject headings: astrometry; ephemerides; Pluto; Kuiper belt 1.