Rotation-And Temperature-Dependence of Stellar
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Better Tapit
Barn 3 Hip No. Consigned by Claiborne Farm, Agent 1 Abrupt First Samurai . Giant’s Causeway Lea . {Freddie Frisson {Greenery . Galileo Abrupt . {High Savannah (GB) Bay colt; Political Force . Unbridled’s Song foaled 2017 {Ire . {Glitter Woman (2009) {Clash . Arch {Hit By LEA (2009), $2,362,398, Donn H. [G1]-ntr, Hal’s Hope S. [G3] twice, Com- monwealth Turf S. [G3], 2nd Woodbine Mile S. [G1], Breeders’ Cup Dirt Mile [G1], etc. His first foals are 3-year-olds of 2020. Sire of 16 wnrs, $932,816, including Muskoka Gold ($155,587, Cup and Saucer S., 2nd Grey S. [G3], etc.), Vast (to 3, 2020, $120,150, Hollywood Wildcat S.). 1st dam Ire, by Political Force. 4 wins at 3 and 4, $202,639, 2nd Mariah’s Storm S. (AP, $13,186), Meafara S. (AP, $13,014), 3rd Arlington Oaks [G3] (AP, $16,170), Mardi Gras H. (FG, $7,500), Happy Ticket S. (FG, $6,000). Sister to Flashy Campaign. Dam of 2 other foals of racing age-- Enrage (f. by Algorithms). Winner at 2, $64,086, 2nd Gin Talking S. (LRL, $20,000). Wrath (c. by Flatter). Winner at 3 and 4, 2020, $50,812. 2nd dam CLASH, by Arch. 2 wins, $86,771. Dam of 6 foals to race, 5 winners, incl.-- FASHION FAUX PAS (f. by Flatter). 3 wins at 2 and 3, 2019, $177,817, Sandpiper S. (TAM, $30,000), Light Hearted S. (DEL, $30,000), 2nd Delaware Oaks [G3] (DEL, $55,000), Mizdirection S. (AQU, $20,000), 3rd Hilltop S. (PIM, $10,000). Ire (f. -
Interferometric Observations of Rapidly Rotating Stars
Astron Astrophys Rev (2012) 20:51 DOI 10.1007/s00159-012-0051-2 REVIEW ARTICLE Interferometric observations of rapidly rotating stars Gerard T. van Belle Received: 10 October 2011 © The Author(s) 2012. This article is published with open access at Springerlink.com Abstract Optical interferometry provides us with a unique opportunity to improve our understanding of stellar structure and evolution. Through direct observation of rotationally distorted photospheres at sub-milliarcsecond scales, we are now able to characterize latitude dependencies of stellar radius, temperature structure, and even energy transport. These detailed new views of stars are leading to revised thinking in a broad array of associated topics, such as spectroscopy, stellar evolution, and exoplanet detection. As newly advanced techniques and instrumentation mature, this topic in astronomy is poised to greatly expand in depth and influence. Keywords Stars: rotation · Stars: imaging · Stars: fundamental parameters · Techniques: interferometric · Techniques: high angular resolution · Stars: individual: Altair, Alderamin, Achernar, Regulus, Vega, Rasalhague, Caph 1 Introduction One of the most fundamental stellar characteristics that is most frequently taken for granted is the shape of a star. This is perhaps somewhat unsurprising—in our direct experience of seeing stellar disks, there is only the sun, which is very nearly a perfect sphere: on an average radius of 959.28 ± 0.15 (Kuhn et al. 2004) there is only a variation of only 9.0 ± 1.8 mas (Rozelot et al. 2003) from equator to pole, indicating an oblateness (b/a − 1) of less than 10−5. However, for a surprisingly non-trivial number of stars, this degree of oblateness is in excess of 20% and, in certain cases, Portions of this manuscript were prepared while in residence at European Southern Observatory Karl-Schwarzschild-Str. -
Deep Ccd Surface Photometry of Galaxy Clusters
The Astrophysical Journal, 575:779–800, 2002 August 20 # 2002. The American Astronomical Society. All rights reserved. Printed in U.S.A. DEEP CCD SURFACE PHOTOMETRY OF GALAXY CLUSTERS. I. METHODS AND INITIAL STUDIES OF INTRACLUSTER STARLIGHT John J. Feldmeier,1 J. Christopher Mihos,2 Heather L. Morrison,1,2 Steven A. Rodney, and Paul Harding Department of Astronomy, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106; [email protected], [email protected], [email protected], [email protected], [email protected] Received 2002 January 3; accepted 2002 April 29 ABSTRACT We report the initial results of a deep imaging survey of galaxy clusters. The primary goals of this survey are to quantify the amount of intracluster light as a function of cluster properties and to quantify the fre- quency of tidal debris. We outline the techniques needed to perform such a survey, and we report findings for the first two galaxy clusters in the survey: A1413 and MKW 7. These clusters vary greatly in richness and structure. We show that our surface photometry reliably reaches to a surface brightness of lv ¼ 26:5 mag arcsecÀ2. We find that both clusters show clear excesses over a best-fitting r1/4 profile: this was expected for A1413 but not for MKW 7. Both clusters also show evidence of tidal debris in the form of plumes and arclike structures, but no long tidal arcs were detected. We also find that the central cD galaxy in A1413 is flattened at large radii, with an ellipticity of 0.8, the largest measured ellipticity of any cD galaxy to date. -
Smartstar Cubepro Telescope Mount Instruction Manual
® SmartStar® CubeProTM Telescope Mount Instruction Manual Table of Content Table of Content ................................................................................................................................... 2 1. SmarStar® CubeProTM Mount Overview ............................................................................................ 4 1.1. SmartStar® CubeProTM Mount .................................................................................................... 4 1.2. Assembly Terms ......................................................................................................................... 5 1.3. Go2Nova® 8408 Hand Controller ............................................................................................... 5 1.3.1. Key Description .................................................................................................................... 6 1.3.2. The LCD Screen .................................................................................................................. 6 1.4. Check the Battery ....................................................................................................................... 7 2. CubeProTM Mount Assembly ............................................................................................................. 8 2.1. Setup a Mount in AA Mode ......................................................................................................... 8 2.2. Install Counterweight ............................................................................................................... -
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 ................................................................................................................................................. -
A Near-Infrared Interferometric Survey of Debris-Disk Stars VII
Astronomy & Astrophysics manuscript no. PIONIER_exozodi20_final ©ESO 2021 April 30, 2021 A near-infrared interferometric survey of debris-disk stars VII. The hot/warm dust connection? O. Absil1,??, L. Marion1, S. Ertel2; 3, D. Defrère4, G. M. Kennedy5, A. Romagnolo6, J.-B. Le Bouquin7, V. Christiaens8, J. Milli7, A. Bonsor9, J. Olofsson10; 11, K. Y. L. Su3, and J.-C. Augereau7 1 STAR Institute, Université de Liège, 19c Allée du Six Août, 4000 Liège, Belgium 2 Large Binocular Telescope Observatory, 933 North Cherry Avenue, Tucson, AZ 85721, USA 3 Steward Observatory, Department of Astronomy, University of Arizona, 993 N. Cherry Ave, Tucson, AZ, 85721, USA 4 Institute of Astronomy, KU Leuven, Celestijnlaan 200D, 3001 Leuven, Belgium 5 Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK 6 Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, Bartycka 18, 00-716, Warsaw, Poland 7 Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France 8 School of Physics and Astronomy, Monash University, Clayton, Vic 3800, Australia 9 Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK 10 Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Av. Gran Bretaña 1111, Playa Ancha, Val- paraíso, Chile 11 Núcleo Milenio Formación Planetaria - NPF, Universidad de Valparaíso, Av. Gran Bretaña 1111, Valparaíso, Chile Received 6 June 2017; accepted 21 April 2021 ABSTRACT Context. Hot exozodiacal dust has been shown to be present in the innermost regions of an increasing number of main sequence stars over the past fifteen years. The origin of hot exozodiacal dust and its connection with outer dust reservoirs remains however unclear. -
Interferometric Observations of Rapidly Rotating Stars
Accepted for publication in A&ARv Interferometric Observations of Rapidly Rotating Stars Gerard T. van Belle1 ABSTRACT Optical interferometry provides us with a unique opportunity to improve our under- standing of stellar structure and evolution. Through direct observation of rotationally distorted photospheres at sub-milliarcsecond scales, we are now able to characterize latitude dependencies of stellar radius, temperature structure, and even energy trans- port. These detailed new views of stars are leading to revised thinking in a broad array of associated topics, such as spectroscopy, stellar evolution, and exoplanet detection. As newly advanced techniques and instrumentation mature, this topic in astronomy is poised to greatly expand in depth and influence. Subject headings: stars: rotation; stars: imaging; stars: fundamental parameters; tech- niques: interferometric; techniques: high angular resolution; stars: individual: Altair, Alderamin, Achernar, Regulus, Vega, Rasalhague, Caph 1. Introduction One of the most fundamental stellar characteristics that is most frequently taken for granted is the shape of a star. This is perhaps somewhat unsurprising — in our direct experience of seeing stellar disks, there is only the sun, which is very nearly a perfect sphere: on an average radius of 959′′.28 0′′.15 (Kuhn et al. 2004) there is only a variation of only 9.0 1.8mas (Rozelot et al. ± ± 2003) from equator to pole, indicating an oblateness (b/a 1) of less than 10−5. However, for − a surprisingly non-trivial number of stars, this degree of oblateness is in excess of 20% and, in arXiv:1204.2572v1 [astro-ph.SR] 11 Apr 2012 certain cases, even 30%. Hints of this have been seen for decades in stellar spectroscopy, but this phenomenon has eluded direct observation until only recently. -
Instruction Manual
iOptron® GEM45 German Equatorial Mount Instruction Manual Product GEM45 (#7600A series) and GEM45EC (#7600ECA series, as shown) Please read the included GEM45 Quick Setup Guide (QSG) BEFORE taking the mount out of the case! This product is a precision instrument. 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 the gear switches. Otherwise personal injury and/or equipment damage may occur. Any worm system damage due to improper operation 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 using a telescope. 2 Table of Contents Table of Contents ........................................................................................................................................ 3 1. GEM45 Introduction ............................................................................................................................... 5 2. GEM45 Overview ................................................................................................................................... 6 2.1. Parts List .......................................................................................................................................... 6 2.2. Identification -
The Dicewaretm Word List
The DicewareTM Word List Diceware lets you make highly secure passphrases that are relatively easy to remember. To use the Diceware list you will need one or more dice. Dice come with many board games and are sold separately at toy, hobby, and magic stores. Toys\R"Us in the US sells a package of five dice for about $0.99. You can purchase five \casino-grade" dice online from Casinocom.com for about $11. First, decide how many words you want in your passphrase. We recommend a five word passphrase for use with PGP, S/MIME and similar encryption programs. For the paranoid, a six word pass phrase will make attacks on your passphrase infeasible for the foreseeable future. If you want to understand why, see the Diceware FAQ at www.diceware.com. Now roll the dice and write down the results on a slip of scrap paper. Write the numbers in groups of five. Make as many of these five digit groups as you want words in you passphrase. You can roll one die five times or roll five dice once, or any combination in between. If you do roll several dice at a time, read the dice from left to right. Look up each five digit number in the Diceware list and find the word next to it. For example, 21124 means your next passphrase word would be \clip". When you are done, the words that you have found are your new passphrase. Memorize them and then either destroy the scrap of paper or keep it in a really safe place. -
European Southern Observatory Bulletin No. 12
EUROPEAN SOUTHERN OBSE RVATORY BULLETIN NO. 12 Thc Govcrnmcnts of Bclgium, the Federal Rcpublie of Gcrmany, Franee, the Netherlands, and Swedcn have signed a Convcntionl ) eoneerning the ercetion of a powerful astronomieal observatory on Oetober 5, 1962. By this Convention a Eur pean rganization for astronomieal rcscarch in the southern hemisphere is ereated. Denmark became a member of the organization on .Iune 1, 1967. The purpose of this organization is the construction, equipment, and operation of an astronomical observatory situated in the southern hemi sphcre. The initial programmc compriscs the following subjcct : 1. a 1.00 m photoelcctric tclcscopc, 2. a 1.50 m spectrographic te1escope, 3. a 1.00 m Schmidt telescope, 4. a 3.60 m telescope, 5. auxiliary equipmcnt ncccssary to carry out rcseard, programmes, 6. the buildings for administration, laboratories, workshops, and accommoda tion of personnel. The site of the observatory is in thc middle betwcen thc Pacific coast and the high chall1 of the Andes, 600 km nonh of Santiago de Chile, on La Silla, at an altitude of 2400 m. The geographical coordinates of the main summit of La Silla are A = + 70° 43' 46~' 50 cp = - 29° 15' 25': 80. They were determined by the Instituto GeogrHico Militar of Santiago/Chile. 1) The ESO Management will on request readlly provide fol' eoples of the Paris Conven t10n of Oetober 5. 1962. Organisation Europeenne pour des Recherehes A tronomiques dans I'Hemisphere Austral EUROPEAN SOUTHERN OBSERVATORY BULLETIN NO. 12 June 1975 Edited by European Southern Observatory, Office of the Director-General Bergedorfer Straße 131, 2050 Hamburg 80, Federal Republic of Germany ESO BULLETIN No. -
Ca Ii H and K Emission from Late-Type Stars
CA II H AND K EMISSION FROM LATE-TYPE STARS PROEFSCHRIFT TER VERKRIJGING VAN DE GRAAS VAN DOCTOR IN DE WISKUNDE EN NATUURWETENSCHAPPEN AAN DE RIJKSUNIVERSITEIT TE UTRECHT, OP GEZAG VAN DE RECTOR MAGNIFICUS PROF. DR. M.A. SOUMAN, VOLGENS BESLUIT VAN HET COLLEGE VAN DECANEN IN HET OPENBAAR TE VE^EDIGBN OP MAANDAG 5 JULI 1982 DES NAMIDDAGS TE 4.IS UUR DOOR FRANS MIDDELKOOP GEBOREN OP 30 JANUARI 1953 TE ROTTERDAM •\ PROMOTOR: PROF.DR.C.ZWAAN opgedragen aan: Ans de Jong (mijn vrouw), Adrianus Middelkoop {mijn vader), Alie Twigt (mijn moeder). De hemelen vertellen Gods eer en het uitspansel verkondigt het werk zijner handen Psalm V9:2 Dankbetuiging Graag wil Ik alle personen en Instellingen die bijgedragen hebben tot de totstandkoming van dit proefschrift van harte bedanken. In de eerste plaats dank Ik mijn promotor, Prof.Dr. Kees Zwaan. Zijn steun en begeleiding zijn, vooral in het eerste jaar van dit onderzoek, van groot belang geweest. Zijn enthousiasme en toewijding hebben mij altijd zeer gestimuleerd. Ook ben ik veel dank verschuldigd aan mijn vriend en collega Barto Oranje. De vele gesprekken die ik met hem heb gevoerd hebben duidelijk invloed op dit proefschrift gehad. Dr. Rene' van Helden heeft mij, op bijzonder prettige en leerzame wijze, de eerste beginselen van de sterrekunde bijgebracht en mij in contact gebracht met mijn promotor. Dr. Tony Hearn stond altijd voor mij klaar als de Interne referee van mijn publikaties. I am also indebted to Dr. Arthur Vaughan who has instructed me on how to use his excellent Ca II H and K photometer. -
Occuttau'on3newsteher
b t I -e W Occuttau'on3Newsteher Revised Edition by The Occultation Newsletter Heritage Project Volume V, Number 3 June 1991 ISBN 0737-6766 Occultation Newsletter is published by the International Occultation Timing Association, Editor and compos- itor: Joan Bixby Dunham; 7006 Megan Lane; Greenbelt, MD 20770-3012; U. S. A. Please send editorial matters to the above. Send new and renewal memberships and subscriptions, back issue requests, address changes, graze prediction requests, reimbursement requests, special requests, and other IOTA business, but not obser- vation reports, to: Craig and Terri McManus; 1177 Collins; Topeka, KS 66604-1524; U.S.A. FROM THE PUBLISHER IOTA NEWS For subscription purposes, this is the first issue of David It Dunham 1991. It is the third issue of Volume 5. Annual IOTA membership dues may be paid by check drawn on an IOTA Meetin&s. There will be two meetings of IOTA American bank, money order, cash, or by charge to this summer, the annual meeting in Texas, and a Visa or MasterCard. If you use Visa or MasterCard, meeting in Puerto Vallarta just before the eclipse. include your account number, the expiration date, and \._ your signature. An IOTA meeting will be held on July 9th in conjunc- tion with The Eclipse Edge expedition, at the IOTA annual membership dues, includinggN, and supple- Buganvilias Sheraton Resort in Puerto Va11arta, ments for U.S.A., Canada, and Mexico "" $25.00 Mexico. We are planning to have lectures in the for all others 30.00 morning and a session on video observations in the afternoon.