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Molecular Outflows Identified in the FCRAO CO Survey of the Taurus
Mon. Not. R. Astron. Soc. 000, 000–000 (0000) Printed 10 November 2018 (MN LATEX style file v2.2) Molecular Outflows Identified in the FCRAO CO Survey of the Taurus Molecular Cloud Gopal Narayanan1, Ronald Snell1, and Ashley Bemis1;2 1 Dept. of Astronomy, Univ. of Massachusetts, Amherst MA 01003 2 Department of Physics and Astronomy, Bonn University, Wegelerstrasse 8, 53115 Bonn, Germany Received 2012 June 14; in original form 2012 April 23; accepted 2012 June 22 ABSTRACT Jets and outflows are an integral part of the star formation process. While there are many detailed studies of molecular outflows towards individual star-forming sites, few studies have surveyed an entire star-forming molecular cloud for this phenomenon. The 100 square degree FCRAO CO survey of the Taurus molecular cloud provides an excellent opportunity to under- take an unbiased survey of a large, nearby, molecular cloud complex for molecular outflow activity. Our study provides information on the extent, energetics and frequency of outflows in this region, which are then used to assess the impact of outflows on the parent molecular cloud. The search identified 20 outflows in the Taurus region, 8 of which were previously unknown. Both 12CO and 13CO data cubes from the Taurus molecular map were used, and dynamical properties of the outflows are derived. Even for previously known outflows, our large-scale maps indicate that many of the outflows are much larger than previously suspected, with eight of the flows (40%) being more than a parsec long. The mass, momentum and kinetic energy from the 20 outflows are compared to the repository of turbulent energy in Taurus. -
Organic Molecules and Water in the Inner Disks of T Tauri Stars
Organic Molecules and Water in the Inner Disks of T Tauri Stars John S. Carr Naval Research Laboratory, Code 7211, Washington, DC 20375, USA [email protected] Joan R. Najita National Optical Astronomy Observatory, 950 N. Cherry Avenue, Tucson, AZ 85716, USA [email protected] ABSTRACT We report high signal-to-noise Spitzer IRS spectra of a sample of eleven classical T Tauri stars. Molecular emission from rotational transitions of H2O and OH and ro-vibrational bands of simple organic molecules (CO2, HCN, C2H2) is common among the sources in the sample. The emission shows a range in both flux and line-to-continuum ratio for each molecule and in the flux ratios of different molecular species. The gas temperatures (200–800 K) and emitting areas we derive are consistent with the emission originating in a warm disk atmosphere in the inner planet formation region at radii < 2 AU. The H2O emission appears to form under a limited range of excitation conditions, as demonstrated by the similarity in relative strengths of H2O features from star to star and the narrow range in derived temperature and column density. Emission from highly excited rotational levels of OH is present in all stars; the OH emission flux increases with the stellar accretion rate, and the OH/H2O flux ratio shows a relatively small scatter. We interpret these results as evidence for OH production via FUV photo-dissociation of H2O in the disk surface layers. No obvious explanation is found for the observed range in the relative emission strengths of different organic molecules or in their strength with respect to water. -
Vol. 73, No. 1 December 2020
Published by the Astronomical League Vol. 73, No. 1 December 2020 PUBLIC OUTREACH DURING A PANDEMIC THE ULTIMATE OBSERVING CHALLENGE th 75 GEAR UP FOR SOLAR CYCLE 25 THE ASTRONOMICAL LEAGUE’S 75TH ANNIVERSARY AN EMPLOYEE-OWNED COMPANY NEW FREE SHIPPING on order of $75 or more & INSTALLMENT BILLING on orders over $350 PRODUCTS Standard Shipping. Some exclusions apply. Exclusions apply. Orion® StarShoot™ Compact Astro Orion® StarShoot™ Mini 6.3mp Tracker Imaging Cameras (sold separately) Orion® StarShoot™ G26 APS-C Orion® GiantView™ BT-100 ED #21192 $280 Color #51883 $400 Color Imaging Camera 90-degree Binocular Telescope (Mount not Mono #51884 $430 #51458 $1,800 #51878 $2,600 included) computer not Trust 2019 included Proven reputation for Orion® U-Mount innovation, dependability and and Paragon Plus service… for over 45 years! XHD Package #22115 $600 Superior Value Orion® StarShoot™ Deep Space High quality products at Orion® StarShoot™ G21 Deep Space Imaging Cameras (sold separately) Orion® HDX 12" Truss RC Ultimate affordable prices Color Imaging Camera G10 Color #51452 $1,200 Astro- Imaging Package #54290 $950 G16 Mono #51457 $1,300 #21101 $9,500 Wide Selection Extensive assortment of award winning Orion brand 2019 products and solutions Customer Support Orion products are also available through select Orion® MagneticDobsonian authorized dealers able to Counterweights offer professional advice and Orion® Premium Linear Orion® EON 130mm ED Triplet Orion® 2x54 Ultra Wide Angle 1-Pound #7006 $25 Binoculars post-purchase support BinoViewer -
ASLC Information Packet
ASLC Information Packet Welcome To The Astronomical Society Of Las Cruces Greetings from the nearly 100 professional and amateur astronomers who comprise the Astronomical Society of Las Cruces (ASLC). Whether you’re new to astronomy or a seasoned veteran, we hope you’ll find participation in the ASLC to be both enjoyable and fulfilling. The club was formed in 1951 by a group of dedicated astronomers including Clyde Tombaugh, who had discovered Pluto just 21 years earlier. For over 50 years, we’ve been sharing the universe with our community under our beautiful Southern New Several members of the club do astrophotography. This Mexico skies. image of the Andromeda galaxy is by Dave Dockery ASLC has active observing, education and public outreach programs. We host a public Moongaze each month, offer adult education courses and support countless star parties for local schools, scouts and various organizations. In addition, we hold a meeting each month featuring a presentation by one of our members or an invited guest. ASLC members support clinics to help new telescope owners learn how to use their equipment. And for individuals who don’t yet have equipment, we offer telescope making workshops. Many of our amateur members go On Saturday evenings around the first quarter beyond observing and collect scientific data on minor moon,club members and the public gather in front of The International Delights Cafe for our monthly Moongaze planets and variable stars. The opportunities are as endless as the stars. The information contained in this packet should help acquaint you with our various activities including our What’s Inside regular meetings and events, our observing sites, Welcome! .............................................. -
Cosmic Cockroaches!
Volume 16, Number 8 August 2007 In This Issue Sail Planes, Music, and ISS Page One Photos by Greg Ozimek, Dale Ochalek • Sail Planes, Music, and ISS • Cosmic Cockroaches! Inside Stuff 2 President’s Corner 3 Meeting Minutes 6 Next Meeting Agenda 7 FAAC Events 2007 7 Treasurer’s Report 7 Astro Imaging SIG 7 Items for Sale 8 GLSG5 – Reserve Your Spot 8 FAAC has Calendars- 2008 8 New Members Doug Bauer is saddled up in back, for a smooth glide in the skies (Greg Ozimek photo). 9 Crater Clavius Start with lots of good food, conversation, sunshine, and sail planes, add 10 Astronomy at the slide guitar music, then top it all with fireworks, a clear night for observing, Beach and even a late flyover by the International Space Station, and you’ve got a 11 Dark Sky Workshop successful, 2nd annual SEMTA/FAAC picnic (August 11 at Richmond Airport). ...continued on page 8 Cosmic Cockroaches! Dr. Tony Phillips Cockroaches are supposed to be tough, able to survive anything from a good stomping to a nuclear blast. But roaches are wimps compared to a little molecule that has recently caught the eye of biologists and astronomers— the polycyclic aromatic hydrocarbon. ...continued on page 3 Page 2 STAR STUFF Ancient Knowledge – Set in Stone STAR STUFF AUGUST 2007 - VOL. 16 - NO. 8 President’s Corner Don Klaser, President, FAAC STAR STUFF is published eleven times each year by the While doing research for the presentation on the FORD AMATEUR ASTRONOMY CLUB P.O. Box 7527 calendar and western culture that I gave last year I came across the subject of archaeoastronomy. -
La Constelacion De Tauro
LA CONSTELACION DE TAURO Es una de las constelaciones más interesantes desde el punto de vista observacional entre las que podemos ver desde el hemisferio norte. En la zona de la bóveda celeste donde identificamos la constelación de Tauro encontramos estrellas dobles y dos bellísimos cúmulos abiertos, asi como la famosa Nebulosa del Cangrejo, objeto Messier M1. 1. Las constelaciones: una aparente imágen estelar: Desde nuestra perspectiva visual como habitantes de un pequeño planeta orbitando alrededor de una estrella en una cierta galaxia espiral, observamos, en todas las direcciones de la bóveda celeste, agrupaciones aparentes de estrellas que llamamos constelaciones. Decimos que son agrupaciones aparentes porque, realmente, no tienen que estar - de hecho no lo están en general - agrupadas físicamente. Es esta la misma situación que se nos plantea en nuestra vida cotidiana cuando observamos a lo lejos dos objetos que aparentan estar juntos, y, ante la duda de si lo están o no, nosotros nos movemos lateralmente a una distancia suficiente para observarlos desde una perspectiva lateral. Es en ese momento cuando, vistos desde otro ángulo, comprobamos si están entre sí próximos o no. Este movimiento lateral es muy sencillo de realizar en nuestros avatares de la vida cotidiana, pero es evidente que, a escala astronómica, es imposible con la tecnología existente en nuestra civilización. Es imposible para nosotros salir de la Vía Láctea, nuestra galaxia espiral, para poder observar “lateralmente” una cierta estrella doble, por ejemplo, de la que sospechamos que no es una doble física, interactuando gravitacionalmente, sino que es una doble de perspectiva. Existen métodos radiométricos, espectrométricos, etc.., que nos permiten calcular la distancia de la estrellas que observamos a simple vista, y sabemos que en general, la distancia a nosotros de astros de una misma constelación varía grandemente. -
CURRICULUM VITAE Name: Matthew A. Wood Address
CURRICULUM VITAE Name: Matthew A. Wood Address: Department of Physics and Astronomy Texas A&M University{Commerce Tel: 903-886-5488 Email: [email protected] Education: Ph.D., Astronomy: The University of Texas at Austin, May 1990 M.A., Astronomy: The University of Texas at Austin, Dec. 1985 B.Sci., Physics: Iowa State University, May 1983 Work Experience: 8/12 { Present Deptartment Head & Professor Department of Physics and Astronomy Texas A&M University{Commerce 8/04 { 7/12 Professor Department of Physics & Space Sciences Florida Institute of Technology 8/96 { 7/04 Associate Professor Florida Institute of Technology 6/91 { 7/96 Assistant Professor Florida Institute of Technology 6/90 { 5/91 NSF{NATO Postdoctoral Fellow D´epartement de Physique Universit´ede Montr´eal Societies: American Astronomical Society International Astronomical Union Royal Astronomical Society Sigma Pi Sigma Florida Academy of Sciences Visiting Scientist: International Ultraviolet Explorer Satellite (NASA/Goddard) Kitt Peak National Observatory Mauna Kea Observatory Keck Observatory Hubble Space Telescope McDonald Observatory Proposal Reviewer: NSF / NASA / NOAO / NOVA (Dutch NSF) Referee: The Astrophysical Journal (Main Journal and Letters) Monthly Notices of the Royal Astronomical Society Astronomy and Astrophysics SCIENCE Publications of the Astronomical Society of the Pacific Astrophysics and Space Science Matthew A. Wood Curriculum Vitae Page 2 Major Grants: PI on grants totaling USD $1.9 million. Selected recent: NASA Kepler Mission (PI) \Cataclysmic Variables -
Astronomy with an Opera-Glass
SSSTRONOMY : : Opera-Glass V ASTRONOMY WITH AN OPEEA-GLASS A POPULAE INTRODUCTION TO THE STUDY OF THE STARRY HEAVENS WITH THE SIMPLEST OF OPTICAL INSTRUMENTS WITH MAPS AND DIRECTIONS TO FACILITATE THE RECOGNITION OF THE CONSTELLATIONS AND THE PRINCIPAL STARS VISIBLE TO THE NAKED EYE BY GARRETT P. SERVISS n " Known are their laws ; in harmony unroll The nineteen-orbed cycles of the Moon. And all the signs through which Night whirls her car From belted Orion back to Orion and his dauntless Hound, And all Poseidon's, all high Zeus' stars Bear on their beams true messages to man." Poste's Arattls. EIGHTH EDITION, WITH APPENDIX NEW YOEK D. APPLETON AND COMPANY 72 FIFTH AVENUE LONDON: 33 BEDFORD STREET 1896 Or • \%**- COPYRIGHT, 1888, By D. APPLETON AJSD COMPANY. .. ^ . TO THE READEK. In the pages that follow, the author has endeavored to encourage the study of the heavenly bodies by pointing out some of the interesting and marvelous phenomena of the uni- verse that are visible with little or no assistance from optical instruments, and indicating means of becoming acquainted with the constellations and the planets. Knowing that an opera-glass is capable of revealing some of the most beautiful sights in the starry dome, and believing that many persons would be glad to learn the fact, he set to work with such an instrument and surveyed all the constellations visible in the latitude of New York, carefully noting everything that it seemed might interest amateur star-gazers. All the objects thus observed have not been included in this book, lest the multiplicity of details should deter or discourage the very readers for whom it was specially written. -
Ranch Meals Great Texas Giveaway I & Ii for Late Arrivals and 2
3:30–3:55 Origin of the Elements:Stellar 1:20 PM McDonald Bus departs The TEXAS STAR PARTY Nucleosynthesis – Molly Wakeling 1:30 PM Museum of Big Bend Tour departs TEXAS STAR PARTY PROGRAM 4:00-4:30 Scientific Travel - Education and (car pool meet at Ranch office) Outreach: Kosovo Pranvera Hyseni 2:00 PM Annual Meeting: SW Region Sunday, May 6 4:30-5:30 TSP Registration (Meeting Hall) of the Astronomical League 2:00 PM Ranch Check-in Opens 6:30 Interfaith Worship Service 4:30-5:30 TSP Registration (Meeting Hall) 9:00 PM Front Gate closes / Dark-out (outside next to Pool Building) Jason Fry, Minister 7:30 PM Speaker – Alex McConahay Monday, May 7 “Which Way Is Up? Musings about Motion 1:00-5:00 TSP Registration (Meeting Hall) 7:30 PM Evening Speaker: Richard S and Direction in the Universe” 4:00-5:00 Orientation to TSP (Meeting Hall) Wright – “Adventures of an Accidental Awards and Great Texas Giveaway I 9:00 PM Front Gate closes / Dark-out Astronomer” 9 PM or 30 minutes after meeting: 9 PM or 30 minutes after meeting: Front Gate closes / Dark-out Tuesday, May 8 Front Gate closes / Dark-out (SCIENCE FICTION DAY!) Saturday, May 12 2018 PROGRAM 8:00 AM Birding excursion – Lodge north Thursday, May 10 1:00 PM McDonald Bus departs Afternoon MC: Kirk Kendrick Of Upper Field. Bring binoculars! (Hawaiian Shirt Day!) 1:00 PM McDonald Bus departs Afternoon MC: Richard Nugent 1:30-1:55 Birding at TSP THANK YOU 1:30-1:55 DSLR Astrophotography Darrell Lee 1:00 PM – Emergency Network Drill at Steve Grimsley 2:00-2:25 Mystic Creek Observatory The TSP and TSP attendees thank W5RSP REPEATER 442.8+, pl 110.9 – all 2:00-2:25 Parking Lot Astronomy in Jim Duke those who made this year’s licensed Hams invited to participate. -
Studying Hydrogen Emission Lines from Classical T Tauri Stars: Telluric Line Removal, Physical Conditions in the Emitting Gas, and Reddening
Studying Hydrogen Emission Lines from Classical T Tauri Stars: Telluric Line Removal, Physical Conditions in the Emitting Gas, and Reddening Dissertation zur Erlangung des Doktorgrades des Fachbereichs Physik der Universit¨atHamburg vorgelegt von Natascha Rudolf aus Hamburg Hamburg 2014 ii Gutachter der Dissertation: Prof. Dr. J¨urgenH. M. M. Schmitt Prof. Dr. Ralph Neuh¨auser Gutachter der Disputation: Prof. Dr. Robi Banerjee Dr. Frederic V. Hessman Datum der Disputation: 26. Juni 2014 Vorsitzender des Pr¨ufungsausschusses: Dr. Robert Baade Vorsitzende des Promotionsausschusses: Prof. Dr. Daniela Pfannkuche Dekan der MIN Fakult¨at: Prof. Dr. Heinrich Graener iii Zusammenfassung W¨ahrendihrer Entstehung durchlaufen Sterne verschiedene Entwicklungsphasen, bevor sie die Hauptreihe erreichen. Sie bilden sich durch den gravitativen Kollaps von molekularen Wolken. Die Erhaltung des Drehimpulses erfordert es, dass die Massenakkretion nicht radial, sondern von einer Scheibe aus stattfindet. Sterne mit niedriger Masse, die sich in einer Entwicklungsphase befinden, in der sich das meiste Material in der Scheibe befindet und der Stern nicht mehr in der Wolke verborgen ist, werden klassische T Tauri Sterne (CTTS) genannt. Diese Arbeit befasst sich mit der zirkumstellaren Umgebung dieser Sterne. Die Untersuchungen basieren auf VLT/X-Shooter-Spektren von 20 Sternen mit unterschiedlichen Spektraltypen und Massenakkretionsraten. Die X-Shooter-Spektren decken zeitgleich einen Spektralbereich von etwa 3000 A˚ bis etwa 25 000 A˚ bei einer mittleren Aufl¨osung(R ∼ 10 000) ab. Ein wichtiger Schritt der Datenreduktion ist die Entfernung der tellurischen Linien, die die Erdatmosph¨aredem Spektrum hinzuf¨ugt.An Stelle der Nutzung beobachteter tellurischer Standardsterne verwende ich Modelle der atmosph¨arischen Transmission, die an die Wetterbe- dingungen zum Zeitpunkt der Beobachtung angepasst sind, um diese Kontamination zu entfer- nen. -
NEWSLETTER/BULLETIN Formerly the National Newsletter the Royal Astronomical Society of Canada La Société Royale D’Astronomie Due Canada
NEWSLETTER/BULLETIN Formerly the National Newsletter The Royal Astronomical Society of Canada La Société Royale d’Astronomie due Canada Supplement to the Journal Vol. 83/2 Supplément au Journal Vol. 83/2 Vol. 1/2 April/avril 1989 ASTRONOMY DAY May 13, 1989 Celebrated by: Astronomy Clubs Planetariums Observatories Science Centres and over a dozen amateur and professional groups Theme: Celebrating the Voyager Odyssey 18 N E W S L E T T E R / B U L L E T I N The Newsletter/Bulletin, formerly the National Newsletter, is a publication of the Royal Astronomical Society of Canada and is distributed together with the Society’s Journal. Inquiries about the Society should be directed to its National Office at 136 Dupont Street, Toronto, Ontario M5R 1V2. Editor: IAN G. MCGREGOR Mailing Address: McLaughlin Planetarium 100 Queen’s Park Toronto, Ontario M5S 2C6 Editorial Staff HARLAN CREIGHTON, DAVID LEVY Rédacteur pour les Centres français DAMIEN LEMAY 3 Quínzieme Rue Ouest Rimouski, Quebec G5L 7Y4 University of Toronto Press Liaison: AL WEIR Deadline for August issue is June 1. Recherches Canadiennes sur la vie Intelligente Extraterrestre par Jacques P. Vallée Section de Radioastronomie Institut Herzberg d’astrophysique Conseil national de recherches du Canada Ottawa, Ontario 1. Pourquoi ces recherches? Anthropomorphisme ou vie dans la galaxie? Depuis plus de mille ans, l’hypothèse anthropomorphique de la prépondérance idéale de l’homme et de la femme a joué le jeu des entonnoirs d’idées nouvelles, d’expériences nouvelles. Ainsi la prevalence de l’idée que la terre étant le centre du monde impliquait que le soleil tournait autour de la terre a causé le schisme entre Galilee et l’Église catholique romaine, et plusieurs dont Giordano Bruno furent brulés en son nom. -
Guidestar November, 2007 Highlights: at the November 2 Meeting
Houston Astronomical Society GuideStar November, 2007 Highlights: At the November 2 meeting... Bob Taylor - JSCAS President ...................5 Astronomy Day 2007 ...................................6 How to Set Up a Go-To Telescope .............7 James Wooten Ceres - a Dwarf Planet ..............................10 The Red (Hot?) Planet ...............................14 The Yerkes Observatory ...........................16 Houston Museum of Natural Stars Get Clearer for Rice Astronomers .17 Science Observatory Duty Roster ..........................18 James Wooten of the HMNS Planetarium: "The Great Cosmic Year", the history of the universe HAS Web Page: (13.7 billion years) compressed into one year. At http://www.AstronomyHouston.org this scale, the universe would age over 37 million years per day!! Time would fly by at 434 years per second. See the GuideStar's Monthly Calendar of Events to confirm dates and times Understand the scale of time and how you fit in of all events for the month, and check when James Wooten presents at the Houston the Web Page for any last minute Astronomical Society. changes. Schedule of meeting activities: All meetings are at the University of Houston Science and Research building. See the inside back cover for a map to the location. Novice meeting: .............................. 7:00 p.m. Richard Nugent Introduction to Total and Grazing Occultations Site orientation meeting: ................. 7:00 p.m. Classroom 121 General meeting: ............................ 8:00 p.m. Room 117 See last page for a map and more information. GuideStar, Vol 25, #11 November, 2007 The Houston Astronomical Society Table of Contents The Houston Astronomical Society is a non-profit corporation organized under section 501 (C) 3 of the Internal Revenue Code.