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The Journal of The Royal Astronomical Society of Canada PROMOTING ASTRONOMY IN CANADA December/décembre 2019 Volume/volume 113 Le Journal de la Société royale d’astronomie du Canada Number/numéro 6 [799] Inside this issue: Thomas Lindsay, TAS Osseo Iron Meteorite Revisited e Tri d Nebula The Best of Monochrome. Drawings, images in black and white, or narrow-band photography. Journal editor Nicole Mortillaro used iTelescope’s remote system to image the Centaurus A galaxy. The telescope she could only dream of owning was a Planewave 20” (0.51m) CDK ƒ/4.4 on a Planewave Ascension 200HR mount with an FLI-PL09000 CCD camera. December / décembre 2019 | Vol. 113, No. 6 | Whole Number 799 contents / table des matières Feature Articles / Articles de fond 252 Astronomical Art & Artifact: Requirements for a Good Astronomical Drawing: A n 227 Thomas Lindsay, Toronto Astronomical Evolving Landscape of Purpose? Society Member—A Remarkable Life by Randall Rosenfeld by Clark Muir 257 Second Light: Two Distinct Populations 231 The Osseo, Ontario, IAB Complex Iron of Globular Clusters Around M31 Meteorite Revisited by Leslie J. Sage by Howard Plotkin and Gary Mckerracher 258 John Percy’s Universe: My Favourite 242 Pen and Pixel: STEVE / Moon / Milky Way / Constellation: Delphinus Pleiades by John R. Percy by Tenho Tuomi / Dave Chapman / Tom Burbee / Stephanie Harron 260 Celestial Review: 2019 Transits and Eclipses by Dave Garner Columns / Rubriques Departments / Départements 236 Skyward: California and the Universe by David Levy 222 President’s Corner by Randy Attwood 238 Observing: Antonín Bečvář’s Atlas of the Heavens 1950.0 223 News Notes / En manchettes by Chris Beckett Compiled by Jay Anderson 240 Binary Universe: Is it a ’Scope Night? 262 Astrocryptic and October Answers Should I Get Ready? by Curt Nason by Blake Nancarrow 263 Index to 2019 246 Dish on the Cosmos: Big Pulsars make Bigger Problems iii Great Images by Erik Rosolowsky by Ian Wheelband 248 CFHT Chronicles: Icy Worlds and Cannibal Galaxies by Mary Beth Laychak Blair MacDonald imaged the much-loved Triffi d Nebula (M 20) from Nova East 2019. He used a Canon 60Da DSLR on a SkyWatcher Esprit 120 ƒ/7 APO refractor at ISO 800. He says he took the images on “the second of three exceptionally clear nights.” He adds that it “made for an interesting challenge processing as the atmospheric refraction caused the red and blue channels to shift as the object approached the tree line. The solution was to split each sub into its three colour channels and align and combine each red channel, each green channel and each blue channel then rebuild the colour image from the combined colour channels.” December / décembre 2019 JRASC | Promoting Astronomy in Canada 221 The Journal is a bi-monthly publication of The Royal A Message from Astronomical Society of Canada and is devoted to the advancement of astronomy and allied outgoing Executive sciences. It contains articles on Canadian astronomers and current activities of the RASC and its Centres, research and review papers by professional and amateur astronomers, and articles of a historical, biographical, or educational nature of general interest to the Director Randy Attwood astronomical community. All contributions are welcome, but the editors reserve the right to edit material prior to publication. Research papers are reviewed prior to publication, and professional astronomers with institutional affi liations are asked to pay publication It is my pleasure to take the editorial area in this issue of charges of $100 per page. Such charges are waived for RASC members who do not the Journal normally reserved for the President to address have access to professional funds as well as for solicited articles. Manuscripts and other submitted material may be in English or French, and should be sent to the Editor-in-Chief. the membership as I step down from the position of Editor-in-Chief David Levy (Skyward) Executive Director. Nicole Mortillaro Blair MacDonald (Imager’s Corner) Email: [email protected] Blake Nancarrow (Binary Universe) It has been an honour for me to be the Society’s Executive Web site: www.rasc.ca Curt Nason (Astrocryptic) Director for the past ve years. My goals during my tenure Telephone: 416-924-7973 John R. Percy (John Percy’s Universe) Fax: 416-924-2911 Randall Rosenfeld (Art & Artifact) were to move the Society to a new level, which I feel I have Eric Rosolowsky (Dish on the Cosmos) Associate Editor, Research accomplished. I saw that we needed to be seen more as a Leslie J. Sage (Second Light) Douglas Hube national royal society with attractive programming, interesting Email: [email protected] David Turner (Reviews) Associate Editor, General Proofreaders publications, and 29 extremely active local Centres. We took Michael Attas Michael Attas the opportunity of the 150th anniversary to promote ourselves Email: [email protected] Margaret Brons Angelika Hackett through new types of events, such as online and coast-to-coast Assistant Editors Michelle Johns national star parties. Canada Post’s issue of two astronomy Michael Allen Barry Jowett Martin Beech Kim Leitch stamps, as well as the Canada Mint’s coin (with a meteorite Dave Chapman Alida MacLeod attached!), introduced the RASC to many more Canadians. Ralph Chou Ralph Croning Design/Production Dave Garner Michael Gatto, Grant Tomchuk We have also put more emphasis on fundraising. We created Patrick Kelly Email: [email protected], a Fundraising Committee and hired fundraising consultant [email protected] Production Manager Lisa Di Veto to guide us through the changes needed to be James Edgar Advertising Email: [email protected] Adela Zyfi successful. We provided speci c programs for members to Email: [email protected] support through giving. We also adjusted the way we recognize Contributing Editors Printing donors and how we report using the funds to support our Jay Anderson (News Notes) Cansel Chris Beckett (Observing Tips) www.cansel.ca educational activities. Mary Beth Laychak (CFHT Chronicles) We now have an employee who oversees the needs of our Her Excellency the Right Honourable Julie Payette, C.C., C.M.M., C.O.M., C.Q., C.D., Governor General of Canada, is the Viceregal Patron of the RASC. youth members, a critical group within the organization. The Journal of The Royal Astronomical Society of Canada is published at an annual subscription rate of $93.45 (including tax) by The Royal Astronomical Society of Canada. We have many exciting things to look forward to: the robotic Membership, which includes the publications (for personal use), is open to anyone telescope, which has had its delays, should come online early interested in astronomy. Applications for subscriptions to the Journal or membership in the next year. In the near future, the Society will be looking for a RASC and information on how to acquire back issues of the Journal can be obtained from: new home, which will include larger working space and room The Royal Astronomical Society of Canada 203 – 4920 Dundas St W for our new Canadian Telescope Museum. Toronto ON M9A 1B7, Canada With more sta in the o ce, we will be able to provide more Email: nationaloffi [email protected] Web site: www.rasc.ca services and support to Centres. We are also in the midst of Telephone: 416-924-7973 planning an upgraded membership system and website. Fax: 416-924-2911 Canadian Publications Mail Registration No. 09818 As we grow, we will need more skilled help in the o ce— Canada Post: Send address changes to 203 – 4920 Dundas St W, Toronto ON M9A 1B7 human resources and governance consultants, along with help Canada Post Publication Agreement No. 40069313 for our computer and communications systems. With the recent hire of a marketing and communications expert, we will We acknowledge the fi nancial support of the Government of Canada through the Canada Periodical Fund (CPF) for our publishing activities. be able to develop and run a coordinated marketing program, © 2019 The Royal Astronomical Society of Canada. enhance our social media presence, and synchronize our All rights reserved. ISSN 0035-872X internal and external communications. We are reworking SkyNews magazine and its website to Cert no. SW-COC-005174 attract more subscribers and viewers, with more focus on RASC activities. 222 JRASC | Promoting Astronomy in Canada December / décembre 2019 I would like to welcome our new Executive Director, Dr. Phil skills—she has helped move the Society forward to the next Gro . Phil brings many skills to this position, skills that are level. ank you all! required to take the Society through the next steps. As the Along the way, I have had the support from many RASCals administration and governance of the growing RASC are across the country, too many to list here. We have so many tended to, we plan to expand our reach across the country to dedicated volunteers. I know you are as proud as I am of the more Canadians. e Society membership should grow, which Society we have become. will provide a larger volunteer base at Centres as well as an increase in overall income. To everyone—old friends and new—I thank you. I would especially like to thank my wife, Betty, who has provided Our o ce sta is amazing: they are all dedicated, immense support to me during the good times and bad over hard-working, and supportive. I will miss them very much. the past ve years; she was always there when I needed her. Working in a small o ce for a not-for-pro t organization I intend to remain active with the Mississauga Centre and I requires a lot of innovation, patience, and hard work. e have a couple of interesting projects to work on.
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  • Eao Submillimetre Futures Paper Series, 2019

    Eao Submillimetre Futures Paper Series, 2019

    EAO SUBMILLIMETRE FUTURES PAPER SERIES, 2019 The East Asian Observatory∗ James Clerk Maxwell Telescope 660 N. A‘ohok¯ u¯ Place, Hilo, Hawai‘i, USA, 96720 1 About This Series Submillimetre astronomy is an active and burgeoning field that is poised to answer some of the most pressing open questions about the universe. The James Clerk Maxwell Telescope, operated by the East Asian Observatory, is at the forefront of discovery as it is the largest single-dish submillimetre telescope in the world. Situated at an altitude of 4,092 metres on Maunakea, Hawai‘i, USA, the facility capitalises on the 850 µm observing window that offers crucial insights into the cold dust that forms stars and galaxies. In 1997, the Submillimetre Common User Bolometer Array (SCUBA) was commissioned, allowing astronomers to detect the furthest galaxies ever recorded (so-called SCUBA galaxies) and develop our understanding of the earliest stages of star formation. Since 2011, its successor, SCUBA-2, has revolutionised submillimetre wavelength surveys by mapping the sky hundreds of times faster than SCUBA. The extensive data collected spans a wealth of astronomy sub-fields and has inspired world-wide collaborations and innovative analysis methods for nearly a decade. Building on the successes of these instruments, the East Asian Observatory is constructing a third generation 850 µm wide-field camera with intrinsic polarisation capabilities for deployment on the James Clerk Maxwell Telescope. In May, 2019, the “EAO Submillimetre Futures” meeting was held in Nanjing, China to discuss the science drivers of future instrumentation and the needs of the submillimetre astronomy community. A central focus of the meeting was the new 850 µm camera.