DOCSLIB.ORG

Southern Observer

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

Southern Observer The Official Journal of The Sutherland Astronomical Society Inc. http://www.sasi.net.au September - October 2018 VOLUME 57 NUMBER 5 PRINT POST APPROVED NO. 100004524 Sutherland Astronomical Society Inc. Office Bearers: Location Curators Cnr Green Point Rd. & Caravan Head Rd. David Parkes (Green Point).......0437-046-934 Oyster Bay, N.S.W. 2225 Australia Brendon Bell (Waterfall) ...........0422-902-730 Lat: -34o 00’ 13”, Long: 151o 04’ 18” Star Night Officer Postal Address Brendon Bell.............................0422-902-730 PO Box 31, Sutherland N.S.W. 1499 [email protected] Telephone (use office holders' direct phone numbers) Merchandise Officer Renae Moss. .............................0415-374-916 Web Site.............. http://www.sasi.net.au [email protected] Email............................. [email protected] Librarian Barry Packman..........................0421-279-542 Patron.............Professor Fred Watson AM [email protected] Elected Committee: Public Officer [email protected] Brett McMillan JP .................... 0408-832-408 [email protected] President Craig Goulden………………….0414-868-497 Website Admin. [email protected] Craig Goulden…………….......0414-868-497 [email protected] Vice President Lou Pagano ...............................0412-416-714 Editorial Sub-Committee [email protected] [email protected] Brett McMillan, Rolando De Michiel & Secretary Al Dodge Brett McMillan JP……………..0408-832-408 [email protected] Education/SASPAC Officer Peter Eyland...............................0408-207-927 Treasurer [email protected] Michael Links................................ 9524-7835 [email protected] Technical Officer Committee Ken McEwen ................................. 9528-7571 [email protected] [email protected] President, V. President, Secretary, Treasurer and: Telescope Sub-Committee Brendon Bell ..............................0422-902-730 [email protected] David Parkes .............................................. Sandy Galos, Ken McEwen, Doug Parkes, Colin Draper ................................................. David Parkes Brief History Contents SASI was formed in 1961 when a small group of Editorial ...................page 4 people constructed an observatory south of the Letters. page 4 Georges River in the leafy southern suburbs of Sydney. The Society was known, until 1978, as In the News .................pages 5-7 the James Cook Astronomers Club and the James Speaker Notes. pages 8-16 Cook Astronomical Society. Observations. pages 17-19 Annual Dinner ................page 20 The present Green Point Observatory is locat- Daytime Astronomers . page 21 ed on Council land at the corner of Green Point Club Stuff ..................pages 22-23 and Caravan Head Roads, Oyster Bay. The prom- Merchandise ................page 24 inent silver dome, with its 41cm (16”) Newtonian Observing Schedule. page 25 tele- scope (now refurbished) and the library were Forthcoming Speakers .........page 26 completed in 1970. The meeting hall was com- Summer Sizzler Star Party .....page 27 pleted in 1974 and a roll-off roof observatory was completed in 1996. This now contains a state-of- The Back Page/Events ........page 28 the-art 35cm (14”) Celestron Schmidt Casseg- rain telescope. The buildings were joined & meeting hall extended in 2007. Meetings Magazine Submissions Give your literary masterpieces directly to The Observatory is open every Thursday evening us, or preferably email them to us as MS Word from 7.00pm. Visitors are welcome, but groups attachment to [email protected]. Please should book first by contacting Brendon Bell send images in jpeg format separately (Star Night Booking Officer). (approx 400kb or 900x900ppi) or submit on 1st Thursday of the month: Guest lecturer USB thumb drive or bulk upload thru www. (7:30pm). wetransfer.com. Please do not embed photos in 2nd Thursday: Junior Section (6:30- emails or MS Word documents unless you also 7:15pm - currently on hold, no meetings) send them separately. Committee meeting (7:30pm), social. 3rd Thursday: Miscellaneous meetings & Deadline for submissions to the DVDs (7:30pm) social November - December 2018 edition is 4th Thursday: Special interest workshops Thursday 20th December. (7:30pm). 5th Thursday: Social Important disclaimer The opinions expressed in this journal Check the notice board, the back page of this jour- are those of the individual authors or nal and the website for any special programs or the editorial Sub-Committee, and are events. not necessarily the opinions of the So- Meetings subject to change, which will be advised ciety or Committee. All articles other by email and posted on website. than those from acknowledged or public PDF Journal sources are the copyright of the Suther- land Astronomical Society Inc. and, if ap- This Journal is available in full colour as a PDF file emailed to your inbox about 1 week before plicable, the individual authors. received by post. To request conversion to PDF journal please email [email protected]. A higher Cover drawing of the Green Point res pdf file is available on request. Observatory courtesy of Ian Sansom. Page 3 Editorial Letters Dear Readers, T'was the night before Christmas Welcome to the September - October 2018 And the word got around edition of “Southern Observer.” The Committee has just announced some That Grannie's Christmas pudding dates for 2019 club events. See the back page Had flopped and was unsound for details. We were lucky to have three good talks in What sad things befall us September and October. On the 6th of Sep- When we expect it not tember Rajika Kuruwita from ANU spoke on "Formation of Binary Stars and Planets To see such disasters Around Binary Star Systems" which was a As food goes to rot most interesting talk. See Stephen's write-up on pg8. But stop and think awhile On 13 September, Snaevarr Gudmunds- son from the Astronomical Society of Ice- In sad and hopeful mood land gave a captivating talk on astronomical Of those who have it all observing in Iceland and being a geologist he And those who have no food spoke on the fascinating geography of Iceland. A highlight was a number of magnificent time We Aussies have a good deal more lapse shots his associates made into a video of auroras. See Rolando's write-up on page 10. Of folk of other nations On 4 October Jesse van de Sand from the We have serenity and peace Sydney Institute for Astronomy at Sydney But sometimes conflagration University. spoke on "What do galaxies and shadow puppets have in common?" and talked It is a sunburnt country, yeah about the shape and spectroscopy of galaxies and our future merger with the Andromeda gal- With floods and fire around axy. See Rolando's write-up on page 14. So when disaster happens, mate On 22 September SASI held its Annu- Our mettle's pretty sound al Dinner which was a big hit with members thanks to Lou Pagano. See photos and write-up We pick ourselves up from the floor on page 20. The Astronomy 2019 Yearbook and guide To start again to sow to the Australian night sky is now available. The crops floods destroyed last year See Renae Moss for your copy. And watch the new lot grow The Secretary has just submitted club viewing nights for 2019 in an easy to read table format. See and print page 25 for your observa- And when disaster strikes our friends tional planning. From any other nation Sandy Galos has written a nice invitation We put aside our differences and summary of suggested activites for the And help, - no hesitation Summer Sizzler Star Party on his Grattai prop- erty to be held 26th thru 31st January. See page 27 for details. Hope you can come! But what we really do not want And finally, we hope you can make it to Above all other things GPO on Sunday 2nd December for the Christ- Is bigotry and wars mas BBQ to meet some new members and old And all those stinking things friends. Hope to see you all there! – Rolando De Michiel Happy Reading, Al, Rolando & Brett ☺ Page 4 In the News Dwarf Galaxy Found by Amateur By: Christopher Crockett | October 24, 2018 September - October 2018 Donatiello I is a tiny galaxy about 10 million light-years away, and it was discovered by an Italian Aussie Telescope Almost Doubles Known hobbyist with a homemade telescope..... Number of Mysterious ‘Fast Radio Bursts - See more at; https://www.skyandtelescope.com/ By Dr Ryan Shannon et al | October 11, 2018 astronomy-news/dwarf-galaxy-found-by-amateur/ Using a radio telescope in Western Australia, astronomers have nearly doubled the known num- Source for Europa Geysers Missing ber of 'fast radio bursts’— powerful flashes of radio By: Camille M. Carlisle | October 23, 2018 waves from deep space. The team's discoveries in- A new look at old data suggests there’s some- clude the closest and brightest fast radio bursts ever thing missing from suspected plumes on Europa: a detected and proof that FRBs come from the other heat source.... side of the Universe, rather than from.... - See more at: https://www.skyandtelescope.com/as- - See more at; https://www.icrar.org/bursts tronomy-news/source-for-europa-geysers-missing/ Ancient Merger Wreckage in the Two Explosions with Similar Quirks Milky Way By: AAS Nova | October 22, 2018 By: Camille M. Carlisle | October 31, 2018 When two neutron stars collided last August, Mounting evidence indicates that our galaxy forming a distinctive gravitational-wave signal and smashed up another smaller galaxy roughly 10 bil- a burst of radiation detected by telescopes
Recommended publications
  • CGEM Series Telescope! the CGEM Series Is Made of the Highest Quality Materials to Ensure Stability and Durability

    CGEM Series Telescope! the CGEM Series Is Made of the Highest Quality Materials to Ensure Stability and Durability

    CCGGEEMM SSeerriieess INSTRUCTION MANUAL CGEM 800 ● CGEM 925 ● CGEM 1100 INTRODUCTION.......................................................................................................................................................................................................................4 Warning.......................................................................................................................................................................................................... 4 ASSEMBLY.................................................................................................................................................................................................................................6 Setting up the Tripod...................................................................................................................................................................................... 6 Attaching the Equatorial Mount ..................................................................................................................................................................... 7 Attaching the Accessory Tray ........................................................................................................................................................................ 8 Installing the Counterweight Bar.................................................................................................................................................................... 8 Installing
  • The Very Long Mystery of Epsilon Aurigae

    The Very Long Mystery of Epsilon Aurigae

    A Unique Eclipsing Variable TheThe VeryVery LongLong MMysteryystery ofof EpsilonEpsilon AAurigaeurigae robertrobert e. sstenceltencel one of the great scientifi c advances of the 20th A remarkable naked-eye star century was the theory of stellar evolution, as physicists worked out not just how stars shine, but how they origi- will soon start dimming for nate, live, change, and die. To test theory against reality, however, astronomers had to determine accurate masses the eighth time since 1821. for many diff erent kinds of stars — and this meant analyz- What’s going on is still ing the motions of binary pairs. Theorists also needed the stars’ exact diameters, and this meant analyzing the light not exactly clear. curves of eclipsing binaries in particular. A century ago, S&T ILLUSTRATION BY CASEY REED giants of early astrophysics worked intensely on the prob- lem of eclipsing-binary analysis. Henry Norris Russell’s paper “On the Determination of the Orbital Elements of Eclipsing Variable Stars,” published in 1912, set the stage for what followed. BIG WHITE STAR, BIGGER BLACK PARTNER Epsilon Aurigae, hotter than the Sun and larger than Earth’s entire orbit, pours forth some 130,000 times the Sun’s light — which is why it shines as brightly as 3rd magnitude even from 2,000 light-years away. According to the currently favored model, a long, dark object will start sliding across its middle this summer. The object seems to be an opaque warped disk 10 a.u. wide and appearing roughly 1 a.u. tall. Whatever lies at its center seems to be hidden — though there’s also evidence that we see right through the center.
  • Instruction Manual

    Instruction Manual

    IINNSSTTRRUUCCTTIIOONN MMAANNUUAALL INTRODUCTION...........................................................................................................................................................4 WARNING.......................................................................................................................................................................4 ASSEMBLY.....................................................................................................................................................................6 ASSEMBLING THE CPC ...................................................................................................................................................6 Setting up the Tripod.................................................................................................................................................6 Adjusting the Tripod Height......................................................................................................................................7 Attaching the CPC to the Tripod...............................................................................................................................7 Adjusting the Clutches...............................................................................................................................................8 The Star Diagonal .....................................................................................................................................................8 The Eyepiece
  • 100 Closest Stars Designation R.A

    100 Closest Stars Designation R.A

    100 closest stars Designation R.A. Dec. Mag. Common Name 1 Gliese+Jahreis 551 14h30m –62°40’ 11.09 Proxima Centauri Gliese+Jahreis 559 14h40m –60°50’ 0.01, 1.34 Alpha Centauri A,B 2 Gliese+Jahreis 699 17h58m 4°42’ 9.53 Barnard’s Star 3 Gliese+Jahreis 406 10h56m 7°01’ 13.44 Wolf 359 4 Gliese+Jahreis 411 11h03m 35°58’ 7.47 Lalande 21185 5 Gliese+Jahreis 244 6h45m –16°49’ -1.43, 8.44 Sirius A,B 6 Gliese+Jahreis 65 1h39m –17°57’ 12.54, 12.99 BL Ceti, UV Ceti 7 Gliese+Jahreis 729 18h50m –23°50’ 10.43 Ross 154 8 Gliese+Jahreis 905 23h45m 44°11’ 12.29 Ross 248 9 Gliese+Jahreis 144 3h33m –9°28’ 3.73 Epsilon Eridani 10 Gliese+Jahreis 887 23h06m –35°51’ 7.34 Lacaille 9352 11 Gliese+Jahreis 447 11h48m 0°48’ 11.13 Ross 128 12 Gliese+Jahreis 866 22h39m –15°18’ 13.33, 13.27, 14.03 EZ Aquarii A,B,C 13 Gliese+Jahreis 280 7h39m 5°14’ 10.7 Procyon A,B 14 Gliese+Jahreis 820 21h07m 38°45’ 5.21, 6.03 61 Cygni A,B 15 Gliese+Jahreis 725 18h43m 59°38’ 8.90, 9.69 16 Gliese+Jahreis 15 0h18m 44°01’ 8.08, 11.06 GX Andromedae, GQ Andromedae 17 Gliese+Jahreis 845 22h03m –56°47’ 4.69 Epsilon Indi A,B,C 18 Gliese+Jahreis 1111 8h30m 26°47’ 14.78 DX Cancri 19 Gliese+Jahreis 71 1h44m –15°56’ 3.49 Tau Ceti 20 Gliese+Jahreis 1061 3h36m –44°31’ 13.09 21 Gliese+Jahreis 54.1 1h13m –17°00’ 12.02 YZ Ceti 22 Gliese+Jahreis 273 7h27m 5°14’ 9.86 Luyten’s Star 23 SO 0253+1652 2h53m 16°53’ 15.14 24 SCR 1845-6357 18h45m –63°58’ 17.40J 25 Gliese+Jahreis 191 5h12m –45°01’ 8.84 Kapteyn’s Star 26 Gliese+Jahreis 825 21h17m –38°52’ 6.67 AX Microscopii 27 Gliese+Jahreis 860 22h28m 57°42’ 9.79,
  • Tímaákvarðanir Á Myrkvum Valinna Myrkvatvístirna Og Þvergöngum Fjarreikistjarna, Árin 2017-2018, Og Fjarlægðamælingar

    Tímaákvarðanir Á Myrkvum Valinna Myrkvatvístirna Og Þvergöngum Fjarreikistjarna, Árin 2017-2018, Og Fjarlægðamælingar

    Tímaákvarðanir á myrkvum valinna myrkvatvístirna, þvergöngum fjarreikistjarna og fjarlægðamælingar, árin 2017—2018 Snævarr Guðmundsson 2019 Náttúrustofa Suðausturlands Litlubrú 2, 780 Höfn í Hornafirði Nýheimar, Litlubrú 2 780 Höfn Í Hornafirði www.nattsa.is Skýrsla nr. Dagsetning Dreifing NattSA 2019-04 10. apríl 2019 Opin Fjöldi síðna 109 Tímaákvarðanir á myrkvum valinna myrkvatvístirna, Fjöldi mynda 229 þvergöngum fjarreikistjarna og fjarlægðamælingar, árin 2017- 2018. Verknúmer 1280 Höfundur: Snævarr Guðmundsson Verkefnið var styrkt af Prófarkarlestur Þorsteinn Sæmundsson, Kristín Hermannsdóttir og Lilja Jóhannesdóttir Útdráttur Hér er gert grein fyrir stjörnuathugunum á Hornafirði á árabilinu 2017 til loka árs 2018. Í flestum tilfellum voru viðfangsefnin óeiginlegar breytistjörnur, aðallega myrkvatvístirni, en einnig var fylgst með nokkrum fjarreikistjörnum. Í mælingum á myrkvatvístirnum og fjarreikistjörnum er markmiðið að tímasetja myrkva og þvergöngur. Einnig er sagt frá niðurstöðum á nándarstjörnunni Ross 248 og athugunum á lausþyrpingunni NGC 7790 og breytistjörnum í nágrenni hennar. Markmið mælinga á nándarstjörnu og lausþyrpingum er að meta fjarlægðir eða aðra eiginleika fyrirbæranna. Að lokum eru kynntar athuganir á litrófi nokkurra bjartra stjarna. Í samantektinni er sagt frá hverju viðfangsefni í sérköflum. Þessi samantekt er sú þriðja um stjörnuathuganir sem er gefin út af Náttúrustofu Suðausturlands. Niðurstöður hafa verið sendar í alþjóðlegan gagnagrunn þar sem þær, ásamt fjölda sambærilegra mæligagna frá stjörnuáhugamönnum, eru aðgengilegar stjarnvísindasamfélaginu. Hægt er að sækja skýrslur um stjörnuathuganir á vefslóðina: http://nattsa.is/utgefid-efni/. Lykilorð: myrkvatvístirni, fjarreikistjörnur, breytistjörnur, lausþyrpingar, ljósmælingar, fjarlægðir stjarna, litróf stjarna. ii Tímaákvarðanir á myrkvum valinna myrkvatvístirna, þvergöngum fjarreikistjarna og fjarlægðamælingar, árin 2017-2018. — Annáll 2017-2018. Timings of selected eclipsing binaries, exoplanet transits and distance measurements in 2017- 2018.
  • Temperature-Spectral Class-Color Index Relationships for Main

    Temperature-Spectral Class-Color Index Relationships for Main

    ASTRONOMY SURVIVAL NOTEBOOK Stellar Evolution SESSION FOURTEEN: THE EVOLUTION OF STARS Approximate Characteristics of Several Types of MAIN SEQUENCE STARS Mass in Contraction Surface Luminosity M Years on Radius Class Comparison to Zero Age Temp. compared Absolute Main in to Sun Main Sequence (K) to sun Magnitude Sequence suns Not well known O6 29.5 10 Th 45,000 140,000 -4.0 2 M 6.2 mid blue super g O9 22.6 100 Th 37,800 55,000 -3.6 4 M 4.7 late blue super g B2 10.0 400 Th 21,000 3,190 -1.9 30 M 4.3 early B5 5.46 1 M 15,200 380 -0.4 140 M 2.8 mid A0 2.48 4 M 9,600 24 +1.5 1B 1.8 early A7 1.86 10 M 7,920 8.8 +2.4 2 B 1.6 late F2 1.46 15 M 7,050 3.8 +3.8 4 B 1.3 early G2 1.00 20 M 5,800 1.0 +4.83 10 B 1.0 early sun K7 0.53 40 M 4,000 0.11 +8.1 50 B 0.7 late M8 0.17 100 M 2,700 0.0020 +14.4 840B 0.2 late minimum 2 Jupiters Temperature-Spectral Class-Color Index Relationships for Main-Sequence Stars Temp 54,000 K 29,200 K 9,600 K 7,350 K 6,050 K 5,240 K 3,750 K | | | | | | | Sp Class O5 B0 A0 F0 G0 K0 M0 Co Index (UBV) -0.33 -0.30 -0.02 +0.30 +0.58 +0.81 +1.40 1.
  • Jjmonl 1810.Pmd

    Jjmonl 1810.Pmd

    alactic Observer John J. McCarthy Observatory G Volume 11, No. 10 October 2018 Halloween spook See page 19 for more information The John J. McCarthy Observatory Galactic Observer New Milford High School Editorial Committee 388 Danbury Road Managing Editor New Milford, CT 06776 Bill Cloutier Phone/Voice: (860) 210-4117 Production & Design Phone/Fax: (860) 354-1595 www.mccarthyobservatory.org Allan Ostergren Website Development JJMO Staff Marc Polansky Technical Support It is through their efforts that the McCarthy Observatory Bob Lambert has established itself as a significant educational and recreational resource within the western Connecticut Dr. Parker Moreland community. Steve Barone Jim Johnstone Colin Campbell Carly KleinStern Dennis Cartolano Bob Lambert Route Mike Chiarella Roger Moore Jeff Chodak Parker Moreland, PhD Bill Cloutier Allan Ostergren Doug Delisle Marc Polansky Cecilia Detrich Joe Privitera Dirk Feather Monty Robson Randy Fender Don Ross Louise Gagnon Gene Schilling John Gebauer Katie Shusdock Elaine Green Paul Woodell Tina Hartzell Amy Ziffer In This Issue INTERNATIONAL OBSERVE THE MOON NIGHT .......................... 3 INTERNATIONAL SPACE STATION/IRIDIUM SATELLITES .............. 18 INOMN HIGHLIGHT, MARE HUMORUM SOLAR ACTIVITY ................................................................ 18 AND GASSENDI CRATER .................................................. 5 NASA'S GLOBAL CLIMATE CHANGE ................................... 18 LUNAR ICE ........................................................................
  • Thursday, September 17, 2009 First Exam, Week from Today Pic of The

    Thursday, September 17, 2009 First Exam, Week from Today Pic of The

    Thursday, September 17, 2009 First exam, week from today Astronomy in the news - end of Ramadan with new Moon. Pic of the Day - Andromeda in the Ultraviolet What happens when two white dwarfs spiral together? Larger mass WD has smaller radius Smaller mass, Which WD has the smaller Roche lobe? Larger The smaller mass radius Larger mass, Which fills its Roche Lobe first? Smaller radius Must be the smaller mass As small mass WD loses mass, its radius gets larger, but its Roche Lobe gets smaller! Runaway mass transfer. Small mass WD transfers essentially all its mass to larger mass WD Could end up with one larger mass WD If larger mass hits Mch → could get explosion => Supernova First WD < 1.4 solar masses First WD gets to 1.4 solar masses Classical Nova Recurrent Nova Two WD EXPLOSION! Gravitational Radiation, in-spiral WDs coalesce < 1.4 solar masses > 1.4 solar masses One Big WD EXPLOSION! End of Material for Test 1 Reading for First Exam Chapter 1: 1.2.3, 1.2.4, 1.3.2 Chapter 2: 2.3 Chapter 3: 3.1, 3.2, 3.3, 3.4, 3.8, 3.9, 3.10 Chapter 4: 4.1, 4.2, 4.3, 4.4, 4.5 Chapter 5: ALL Sky Watch Extra Credit Due Thursday, in Class Must be typed on regular 8-1/2x11 paper See web site for more details, or ask! See web site for star charts to help guide you where and when to look. Part of the exercise is to learn how to orient yourself and recognize objects and patterns in the sky.
  • August 2008 Newsletter Page 1

    August 2008 Newsletter Page 1

    ASSA PRETORIA - AUGUST 2008 NEWSLETTER PAGE 1 NEWSLETTER AUGUST 2008 The next meeting of the Pretoria Centre will take place at Christian Brothers College, Pretoria Road, Silverton, Pretoria Date and time Wednesday 27 August at 19h15 Chairperson Percy Jacobs Beginner’s Corner “Astronomy Starter Package” by Percy J & Danie B What’s Up in the Sky? Danie Barnardo ++++++++++ LEG BREAK - Library open +++++++++++++ MAIN TALK “A Lunar Geotechnical GIS* ” by Leon Croukamp The meeting will be followed by tea/coffee and biscuits as usual. The next observing evening will be held on Friday 22 August at the Pretoria Centre Observatory, which is also situated at CBC. Arrive anytime from 18h30 onwards. *A Lunar Geotechnical GIS for future exploration starting with some comments on why we go back to the moon INSIDE THIS NEWSLETTER LAST MONTH’S MEETING.............................................................................................2 LAST MONTH’S OBSERVING EVENING........................................................................4 STAR NOMENCLATURE OR “NOT ALPHA CRUX, ALPHA CRUCIS ...............................5 NEW KIND OF STAR DISCOVERED IN URSA MAJOR ..................................................7 THE CLIFFS OF MERCURY ...........................................................................................8 BUILDING BLOCKS OF LIFE DETECTED IN DISTANT GALAXY....................................8 TWENTY-FIVE OF HUBBLE'S GREATEST HITS............................................................8 THE WHIRLPOOL GALAXY............................................................................................9
  • The W.A.S.P the Warren Astronomical Society Paper

    The W.A.S.P the Warren Astronomical Society Paper

    Vol. 49, no. 1 January, 2018 The W.A.S.P The Warren Astronomical Society Paper President Jeff MacLeod [email protected] The Warren Astronomical Society First Vice President Jonathan Kade [email protected] Second Vice President Joe Tocco [email protected] Founded: 1961 Treasurer Ruth Huellmantel [email protected] P.O. Box 1505 Secretary Parker Huellmantel [email protected] Outreach Diane Hall [email protected] Warren, Michigan 48090-1505 Publications Brian Thieme [email protected] www.warrenastro.org Entire board [email protected] Astronomy at the Beach Class of 2017 / Photo credit: Phyllis Voorheis 2017 Warren Astronomical Society Banquet The Warren Astronomical Society concluded the year with a bang-up finale, accompanied by an impromptu drum line. Booming drums aside, it was a delight to see new faces in the group. Plus, Jeff MacLeod managed to work in a bit of juggling. The prize table, once again, had a desirable selection of prizes, a choice one being a Vixen telescope which went to our president-elect, Jeff MacLeod. The way he clutched it, you could almost hear him whispering, “My Precious.” Many thanks to the product sponsors for the event: Apache-Sitgreaves Research Center, Celestron Corporation, Oberwerk Corporation, Sirius Astro Products, and Sky and Telescope Magazine, along with the many generous donations from our own members. Continued pg 3 1 Society Meeting Times January Discussion Astronomy presentations and lectures twice Group Meeting each month at 7:30 PM: Tuesday, January 23 from 6:30 - 8:30 PM First Monday at Cranbrook Institute of 22275 Michigan Ave. Science. Dearborn, Michigan Third Thursday at Macomb Community Coffee and cookies provided (donations College - South Campus Building J (Library) requested), bring snacks and drinks to share.
  • 121012-AAS-221 Program-14-ALL, Page 253 @ Preflight

    121012-AAS-221 Program-14-ALL, Page 253 @ Preflight

    221ST MEETING OF THE AMERICAN ASTRONOMICAL SOCIETY 6-10 January 2013 LONG BEACH, CALIFORNIA Scientific sessions will be held at the: Long Beach Convention Center 300 E. Ocean Blvd. COUNCIL.......................... 2 Long Beach, CA 90802 AAS Paper Sorters EXHIBITORS..................... 4 Aubra Anthony ATTENDEE Alan Boss SERVICES.......................... 9 Blaise Canzian Joanna Corby SCHEDULE.....................12 Rupert Croft Shantanu Desai SATURDAY.....................28 Rick Fienberg Bernhard Fleck SUNDAY..........................30 Erika Grundstrom Nimish P. Hathi MONDAY........................37 Ann Hornschemeier Suzanne H. Jacoby TUESDAY........................98 Bethany Johns Sebastien Lepine WEDNESDAY.............. 158 Katharina Lodders Kevin Marvel THURSDAY.................. 213 Karen Masters Bryan Miller AUTHOR INDEX ........ 245 Nancy Morrison Judit Ries Michael Rutkowski Allyn Smith Joe Tenn Session Numbering Key 100’s Monday 200’s Tuesday 300’s Wednesday 400’s Thursday Sessions are numbered in the Program Book by day and time. Changes after 27 November 2012 are included only in the online program materials. 1 AAS Officers & Councilors Officers Councilors President (2012-2014) (2009-2012) David J. Helfand Quest Univ. Canada Edward F. Guinan Villanova Univ. [email protected] [email protected] PAST President (2012-2013) Patricia Knezek NOAO/WIYN Observatory Debra Elmegreen Vassar College [email protected] [email protected] Robert Mathieu Univ. of Wisconsin Vice President (2009-2015) [email protected] Paula Szkody University of Washington [email protected] (2011-2014) Bruce Balick Univ. of Washington Vice-President (2010-2013) [email protected] Nicholas B. Suntzeff Texas A&M Univ. suntzeff@aas.org Eileen D. Friel Boston Univ. [email protected] Vice President (2011-2014) Edward B. Churchwell Univ. of Wisconsin Angela Speck Univ. of Missouri [email protected] [email protected] Treasurer (2011-2014) (2012-2015) Hervey (Peter) Stockman STScI Nancy S.
  • The Photosphere and Circumstellar Environment of the Be Star Achernar

    The Photosphere and Circumstellar Environment of the Be Star Achernar

    New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry Proceedings IAU Symposium No. 307, 2014 c International Astronomical Union 2015 G.Meynet,C.Georgy,J.H.Groh&Ph.Stee,eds. doi:10.1017/S1743921314006905 The photosphere and circumstellar environment of the Be star Achernar Daniel M. Faes1,2, Armando Domiciano de Souza2,AlexC.Carciofi1 and Philippe Bendjoya2 1 Instituto de Astronomia, Geof´ısica e Ciˆencias Atmosf´ericas, Universidade de S˜ao Paulo, Rua do Mat˜ao 1226, Cidade Universit´aria, 05508-900, S˜ao Paulo, SP, Brazil email: [email protected] 2 Lab. J.-L. Lagrange, UMR 7293 - Observatoire de la Cˆote d’Azur (OCA), Univ. de Nice-Sophia Antipolis (UNS), CNRS, Valrose, 06108 Nice, France Abstract. Achernar is a key target to investigate high stellar rotation and the Be phenonemon. It is also the hottest star for which detailed photospheric information is available. Here we report our results to determine the photospheric parameters of Achernar and evaluate how the emission of a Viscous Decretion Disk (VDD) around it would be observable. The analysis is based on interferometric data (PIONIER and AMBER at ESO-VLTI), complemented by spectroscopy and polarimetry for the circumstellar emission. For the first time fundamental parameters of a Be photosphere were determined. The presence of a residual disk at the quiescent phase and some characteristics of the new formed disk (2013 activity) are also discussed. This is rare opportunity to precisely determine the stellar brightness distribution and evaluate the evolution of a just formed Be disk. Keywords. stars: individual (Achernar), stars: fundamental parameters, techniques: interfero- metric, circumstellar matter, stars: emission-line, Be 1.