March 2019 Newsletter
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GEORGE HERBIG and Early Stellar Evolution
GEORGE HERBIG and Early Stellar Evolution Bo Reipurth Institute for Astronomy Special Publications No. 1 George Herbig in 1960 —————————————————————– GEORGE HERBIG and Early Stellar Evolution —————————————————————– Bo Reipurth Institute for Astronomy University of Hawaii at Manoa 640 North Aohoku Place Hilo, HI 96720 USA . Dedicated to Hannelore Herbig c 2016 by Bo Reipurth Version 1.0 – April 19, 2016 Cover Image: The HH 24 complex in the Lynds 1630 cloud in Orion was discov- ered by Herbig and Kuhi in 1963. This near-infrared HST image shows several collimated Herbig-Haro jets emanating from an embedded multiple system of T Tauri stars. Courtesy Space Telescope Science Institute. This book can be referenced as follows: Reipurth, B. 2016, http://ifa.hawaii.edu/SP1 i FOREWORD I first learned about George Herbig’s work when I was a teenager. I grew up in Denmark in the 1950s, a time when Europe was healing the wounds after the ravages of the Second World War. Already at the age of 7 I had fallen in love with astronomy, but information was very hard to come by in those days, so I scraped together what I could, mainly relying on the local library. At some point I was introduced to the magazine Sky and Telescope, and soon invested my pocket money in a subscription. Every month I would sit at our dining room table with a dictionary and work my way through the latest issue. In one issue I read about Herbig-Haro objects, and I was completely mesmerized that these objects could be signposts of the formation of stars, and I dreamt about some day being able to contribute to this field of study. -
A. Meredith Hughes Curriculum Vitae – May 29, 2019 Van Vleck Observatory [email protected] 96 Foss Hill Dr
A. Meredith Hughes Curriculum Vitae – May 29, 2019 Van Vleck Observatory [email protected] 96 Foss Hill Dr. http://amhughes.web.wesleyan.edu/ Middletown, CT 06459 Phone: (860) 685-3667 Office: VVO109 EDUCATION Harvard University, Cambridge, Massachusetts Ph.D., Astronomy (Advisor: Dr. David Wilner) May 2010 Thesis title: Circumstellar Disk Structure through Resolved Submillimeter Observations Yale University, New Haven, Connecticut B.S., Astronomy and Physics (with distinction), summa cum laude 2005 PROFESSIONAL EXPERIENCE Associate Professor, Wesleyan University Department of Astronomy 2019-present Assistant Professor, Wesleyan University Department of Astronomy 2013-2019 Miller Fellow, UC Berkeley Department of Astronomy 2010-2012 Graduate Student Researcher, Harvard University Department of Astronomy 2005-2010 RESEARCH INTERESTS Planet formation. Circumstellar disk structure and dynamics: gas and dust. Disk evolution: viscous transport and clearing processes. Radio astronomy. Aperture synthesis techniques. HONORS AND AWARDS Cottrell Scholar, Research Corporation for Science Advancement (for outstanding teacher-scholars) 2018 Bok Prize, Harvard University Dept of Astronomy (research excellence by PhD graduate under age 35) 2015 Miller Fellowship, Miller Institute for Basic Research in Science, UC Berkeley 2010-2012 Fireman Fellowship, Harvard University Dept of Astronomy (outstanding PhD thesis) 2010 National Science Foundation Graduate Research Fellowship 2007-2010 Certificate of Distinction in Teaching, Derek Bok Center at Harvard University 2009 George Beckwith Prize in Astronomy, Yale University 2005 Phi Beta Kappa, Yale University (top 1% of Junior class) 2003 TEACHING & ADVISING Postdoctoral Collaborators Supervised Kevin Flaherty, 2013-2018 à Williams College Lecturer and Observatory Supervisor MA Theses Supervised 2013-present 6. Jonas Powell ’19 à Systems & Technology Research, Woburn, MA Exploring the Role of Environment in the Composition of ONC Proplyds. -
Instruction Manual
iOptron® GEM28 German Equatorial Mount Instruction Manual Product GEM28 and GEM28EC Read the included Quick Setup Guide (QSG) BEFORE taking the mount out of the case! This product is a precision instrument and uses a magnetic gear meshing mechanism. Please read the included QSG before assembling the mount. Please read the entire Instruction Manual before operating the mount. You must hold the mount firmly when disengaging or adjusting the gear switches. Otherwise personal injury and/or equipment damage may occur. Any worm system damage due to improper gear meshing/slippage will not be covered by iOptron’s limited warranty. If you have any questions please contact us at [email protected] WARNING! NEVER USE A TELESCOPE TO LOOK AT THE SUN WITHOUT A PROPER FILTER! Looking at or near the Sun will cause instant and irreversible damage to your eye. Children should always have adult supervision while observing. 2 Table of Content Table of Content ................................................................................................................................................. 3 1. GEM28 Overview .......................................................................................................................................... 5 2. GEM28 Terms ................................................................................................................................................ 6 2.1. Parts List ................................................................................................................................................. -
NCRAL Northern Lights Winter 2021
who have earned pins and certificates galore. Nothing seems INSIDE THIS ISSUE OF Northern Lights to keep these intrepid observers down. Would that all other astronomy clubs had such active members when it comes to NCRAL Chair’s Message…..............................……………………1 observing! (Perhaps there are, but they aren’t telling!) NCRAL Financial Statement Autumn 2020………………….……2 Looking Ahead to 2021 NCRAL 2021 May 7-8……………………..………………………..………2 Call for 2021 NCRAL Nominations & Applications……….......3 NCRAL 2021 is scheduled for Friday/Saturday, May 7-8, NCRAL Seasonal Messier Marathon Awards…………….………5 and I’m looking forward to it. I hope you are too. The Noteworthy!……………………………………………………………………6 convention will be hosted by the Neville Public Museum Profiles in Amateur Astronomy: Alan Sheidler (PAC)…..……7 Astronomical Society in De Pere, Wisconsin, just south of Club Leadership for Our Time by Carl J. Wenning………...……8 Green Bay assuming the pandemic doesn’t interfere as it did Radio Astronomy by Tim Stone…………………………….……..…10 last spring. I’m already making plans to attend NCRAL 2021 2021 Rising and Setting Charts by Jeffrey L. Hunt……….….14 and hope you are doing the same. Later in this newsletter Astronomical League 75th Anniversary Coming……..…….…17 you’ll find information about speakers, activities, and Mars 2021: Until Conjunction by Jeffrey L. Hunt.………..….18 facilities. Get this event into your calendar now so you can Future NCRAL Conventions…………………………………..……….22 avoid a schedule conflict. Seasonal Messier Mini Marathon Observing Program……22 Don’t forget to think about nominations for Regional Add Your Email Address to NCRAL Member Database…...23 officers. This year we need to elect Chair and Vice Chair to NCRAL Website………………………………………………………….….23 two-year terms and vote for a Secretary-Treasurer to Regional Officer & Leader Contact Information………..……24 complete the second year of a two-year term that began in May 2020. -
Extrasolar Planets and Their Host Stars
Kaspar von Braun & Tabetha S. Boyajian Extrasolar Planets and Their Host Stars July 25, 2017 arXiv:1707.07405v1 [astro-ph.EP] 24 Jul 2017 Springer Preface In astronomy or indeed any collaborative environment, it pays to figure out with whom one can work well. From existing projects or simply conversations, research ideas appear, are developed, take shape, sometimes take a detour into some un- expected directions, often need to be refocused, are sometimes divided up and/or distributed among collaborators, and are (hopefully) published. After a number of these cycles repeat, something bigger may be born, all of which one then tries to simultaneously fit into one’s head for what feels like a challenging amount of time. That was certainly the case a long time ago when writing a PhD dissertation. Since then, there have been postdoctoral fellowships and appointments, permanent and adjunct positions, and former, current, and future collaborators. And yet, con- versations spawn research ideas, which take many different turns and may divide up into a multitude of approaches or related or perhaps unrelated subjects. Again, one had better figure out with whom one likes to work. And again, in the process of writing this Brief, one needs create something bigger by focusing the relevant pieces of work into one (hopefully) coherent manuscript. It is an honor, a privi- lege, an amazing experience, and simply a lot of fun to be and have been working with all the people who have had an influence on our work and thereby on this book. To quote the late and great Jim Croce: ”If you dig it, do it. -
The Observer of the Twin City Amateur Astronomers
THE OBSERVER OF THE TWIN CITY AMATEUR ASTRONOMERS Volume 46, Number 3 March 2021 INSIDE THIS ISSUE: LAST WORDS AS EDITOR – CARL J. WENNING 1 Last Words as Editor – Carl J. Wenning It has been a pleasure to have 2 President’s Note served as your editor beginning 3 Calendar of Astronomical Events – March 2021 with the January 2014 edition of 3 New & Renewing Members/Dues Blues/E-Mail List The OBSERVER. Since that time, I 4 This Month’s Phases of the Moon have worked to produce 87 issues 4 This Month’s Solar Phenomena that included some 2,100 pages, 4 TCAA Celebrates 61 Years with Annual Meeting about 1,200,000 words, and a myriad of images. Not all the 5 NCRAL 2021 Cancelled words and few of the images were 6 AstroBits – News from Around the TCAA mine; there have been many other 8 TCAA Monthly Online Meeting for March contributors over the years. I 8 History of the TCAA (2010-2019): Part 1 hesitate to mention any names for 9 Spring Mood fear of missing someone. You know their names and have seen the 10 March 2021 with Jeffrey L. Hunt results of their efforts. I thank every one of you who has taken the 20 Public Viewing Sessions for 2021 time and energy necessary to write an article, submit an AstroBit, 21 TCAA Image Gallery or share an image for the benefit of the membership. 21 Did You Know? It is often said that editorship is a thankless task. In the main, 21 TCAA Treasurer’s Report as of February 26, 2021 that’s true – but not always. -
Spitzer Approved Galactic Spitzer Approved Galactic
Printed_by_SSC Mar 25, 10 16:33Spitzer_Approved_Galactic Page 1/847 Mar 25, 10 16:33Spitzer_Approved_Galactic Page 2/847 Spitzer Space Telescope − Archive Research Proposal #20309 Spitzer Space Telescope − Archive Research Proposal #30144 PAH Emission Features in the 15 to 20 Micron Region: Emitting to the Beat of a Diamonds are a PAHs Best Friend Different Drummer Principal Investigator: Louis Allamandola Principal Investigator: Louis Allamandola Institution: NASA Ames Research Center Institution: NASA Ames Research Center Technical Contact: Louis Allamandola, NASA Ames Research Center Technical Contact: Louis Allamandola, NASA Ames Research Center Co−Investigators: Co−Investigators: Andrew Mattioda, SETI Andrew Mattioda, SETI Institute and NASA Ames Els Peeters, SETI Els Peeters, NASA Ames Research Center Douglas Hudgins, NASA Ames Research Center Douglas Hudgins, NASA Ames Research Center Alexander Tielens, NASA Ames Research Center Xander Tielens, Kapteyn Institute, The Netherlands Charles Bauschlicher, Jr., NASA Ames Research Center Charlie Bauschlicher, Jr., NASA Ames Research Center Science Category: ISM Science Category: ISM Dollars Approved: 56727.0 Dollars Approved: 72000.0 Abstract: Abstract: The mid−IR spectroscopic capabilities and unprecedented sensitivity of the Spitzer has added a new complex of bands near 17 um to the PAH emission band Spitzer Space Telescope has shown that the ubiquitious infrared (IR) emission family. This 17 um band complex, the second most intense of the PAH features, features can be used as probes of many galactic and extragalactic objects. carries unique information about the emitting species. Because these bands arise These features, formerly called the Unidentified Infrared (UIR) Bands, are now from drumhead vibrations of the hexagonal carbon skeleton, they carry generally attributed to the vibrational emission from polycyclic aromatic information directly related to PAH shape, size, and charge. -
Fermat's Last Theorem
ALSO BY AMIR D. ACZEL FERMAT'S LAST THEOREM Unlocking the Secret of an Ancient Mathematical Problem "Captivating...a tale of buried treasure...lucidly presented." —The New York Times Available from Dell PRAISE FOR AMIR D. ACZEL'S FERMAT'S LAST THEOREM "This is a captivating volume....The brilliant backdoor method used by Mr. Wiles as he reached his solution, along with the debt he owed to many other contemporary mathematicians, is graspable in Mr. Aczel's lucid prose. Equally important is the sense of awe that Mr. Aczel imparts for the hidden, mystical harmonies of numbers, and for that sense of awe alone, his slender volume is well worth the effort." —The New York Times "For more than three centuries, Fermat's Last Theorem was the most famous unsolved problem in mathematics; here's the story of how it was solved....An excellent short history of mathematics, viewed through the lens of one of its great problems—and achievements." —Kirkus Reviews "This exciting recreation of a landmark discovery reveals the great extent to which modern mathematics is a collaborative enterprise....While avoiding technical details, Aczel maps the strange, beautiful byways of modern mathematical thought in ways the layperson can grasp." —Publishers Weekly "A mathematical bonbon of a book...Briefly chronicles the history of the famous problem of the title, which was recently solved by a mathematician named Andrew Wiles after he had devoted seven years to the task....Aczel does a superb job of creating in the nonmathematical reader the illusion of comprehension." —The New Yorker Einstein, Relativity, and the Expanding Universe <> Amir D. -
Occuttau'on@Newsteuer
Occuttau'on@Newsteuer Volume III, Number 9 November, 1984 Occultation Newsletter is published by the International Occultation Timing Association. Editor and compos- itor: H. F. DaBo11; 6 N 106 White Oak Lane; St. Charles, IL 60174; U. S. A. Please send editorial matters, renewals, address changes, and reimbursement requests to the above, but for new memberships, new subscrip- tions, back issues, and any special requests, write to IOTA; P. 0. Box 3392; Columbus, OH 43210-0392; U.S.A. FROM THE PUBLISHER possible). The round-trip air fare from Amsterdam to Djakarta is about 1500 DM, included in the total For subscription purposes, this is the third issue price. They hope to observe near the southern limit of 1984. in West Irian. Alan Fiala and I expect to compute and distribute detailed predictions of the path, When renewing, please give your name and address ex- taking the lunar profile into account, in October. actly as it appears on your mailing label, so that He also hope to reduce a small amount of data from we can locate your file; if the label should be re- the May 30th eclipse to estimate an empirical cor- vised, tell us how it should be changed. rection to the prediction. We now have a prelimi- nary master record of the central two or three min- o.n.'s price is $1.40/issue, or $5.50/year (4 is- utes of several video records of the May 30th sues) including first class surface mailing. Back eclipse, which has been (or soon will be) distribut- issues through vol. -
David James Wilner Contact
Curriculum Vitæ Name: David James Wilner Contact: Center for Astrophysics, MS 42 60 Garden Street, Cambridge, MA 02138 tel: 617 496-7623; fax: 617 495-7345 e-mail: [email protected] web: www.cfa.harvard.edu/∼dwilner Education: 1993 Ph.D. University of California at Berkeley, Astronomy Thesis: Millimeter Aperture Synthesis Observations of High Mass Star Forming Regions (Advisor: Wm. J. Welch) 1989 M.A. University of California at Berkeley, Astronomy 1987 A.B. Princeton University, Physics Positions: 2012– Senior Astrophysicist, Smithsonian Astrophysical Observatory 2010– Associate Director, Radio and Geoastronomy Division, Center for Astrophysics | Harvard & Smithsonian 1998–2020 Lecturer on Astronomy, Harvard University 1998–2012 Astrophysicist, Smithsonian Astrophysical Observatory 1996–1998 NASA Hubble Fellow, Center for Astrophysics | Harvard & Smithsonian 1993–1996 CfA Fellow, Center for Astrophysics | Harvard & Smithsonian 1987 Summer Research Assistant, National Optical Astronomy Observatories 1986 Summer Researcher, Maria Mitchell Observatory Research Interests: Star and planet formation. Protoplanetary disks. Debris disks. High redshift galaxies. Radio Astronomy. Aperture synthesis observations and techniques. Publications Summary: 350+ refereed papers with 21000+ citations; h-index = 80 (source: ADS) Professional Societies: AAS (American Astronomical Society) URSI (International Union of Radio Science) IAU (International Astronomical Union) 1 Honors and Awards: 2018 NOVA Lecturer, Netherlands 2017 Secretary’s Research Prize, -
University of Cincinnati
UNIVERSITY OF CINCINNATI Date:___________________ I, _________________________________________________________, hereby submit this work as part of the requirements for the degree of: in: It is entitled: This work and its defense approved by: Chair: _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ Dust Grain Growth and Disk Evolution of a Set of Young Stellar Objects A dissertation submitted to the Division of Research and Advanced Studies of the University of Cincinnati in partial fulfillment of the requirements for the degree of Doctor of Philosophy (Ph.D.) in the department of Physics of the McMicken College of Arts and Sciences 2008 by William Joseph Carpenter B.S. The Ohio State University, 1998 M.S. Miami University of Ohio, 2001 Committee Chair: Prof. Michael Sitko, Ph.D. Abstract This work investigates the observed properties of a sample of young stellar systems using two computer-modeling codes, DUSTY and the Whitney TTSRE codes, to fit the spectra of many objects. The parameters of these computer models are used to attempt to answer several basic questions related to circumstellar disk evolution. Silicate band strengths and millimeter spectral indexes are related to grain growth and are found to be reasonably correlated for the group of models. Circumstellar disk self-shadowing can effect the spectral shape of far infrared data and the relation between the two are studied showing a possible correlation, however other factors can effect the shape of the far infrared data and so a firm correlation can not be confirmed. Six objects out of the nearly 50 stars fit with DUSTY are fit with the Whitney code. Chronological age estimates are compared with model parameters but no correlation could be found between either silicate band strength or millimeter spectral index and the objects’ ages. -
TRIBULATION- 1St, 2Nd & 3Rd Seals
65 CHAPTER 7: TRIBULATION- 1st, 2nd & 3rd Seals The Tribulation refers to tumultuous events that are described during the "Sign of His Coming and the End of the Age", first mentioned by Jesus in the Olivet Discourse in Matthew 24:3. Matthew 24:8-9 “But all these things are merely the beginning of birth pangs. 9 “Then they will deliver you to tribulation, and will kill you, and you will be hated by all nations because of My name. 111 Christ told us that then after the birth pains, we would enter the time of Tribulation. He mentioned the birth pains as war, rumors of war, famines and earthquakes occurring prior to the time of Tribulation. In the previous chapter entitled “Rumors of War” we have just taken a look at the waging of war and the false peace alliance events that led us into the time of Tribulation. Matthew 24:7 “For nation will rise against nation, and kingdom against kingdom, and in various places there will be famines and earthquakes.” 112 Among Bible scholars, there are differing views about what will happen to Christians or believers during the Tribulation. Pre-tribulation scholars believe that all Christians who are either dead or alive will be taken bodily up to Heaven (called the Rapture) before this Tribulation begins. So, who do these scholars believe is the “deliver you to tribulation” referring to when Christ spoke this during His Olivet Discourse? According to this belief, every true Christian that has ever existed throughout the course of the entire Christian era will be instantaneously transformed into a perfect resurrected body, and will thus escape the trials of the Tribulation.