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The NTT Provides the Deepest Look Into Space 6
The NTT Provides the Deepest Look Into Space 6. A. PETERSON, Mount Stromlo Observatory,Australian National University, Canberra S. D'ODORICO, M. TARENGHI and E. J. WAMPLER, ESO The ESO New Technology Telescope r on La Silla has again proven its extraor- - dinary abilities. It has now produced the "deepest" view into the distant regions of the Universe ever obtained with ground- or space-based telescopes. Figure 1 : This picture is a reproduction of a I.1 x 1.1 arcmin portion of a composite im- age of forty-one 10-minute exposures in the V band of a field at high galactic latitude in the constellation of Sextans (R.A. loh 45'7 Decl. -0' 143. The individual images were obtained with the EMMI imager/spectrograph at the Nas- myth focus of the ESO 3.5-m New Technolo- gy Telescope using a 1000 x 1000 pixel Thomson CCD. This combination gave a full field of 7.6 x 7.6 arcmin and a pixel size of 0.44 arcsec. The average seeing during these exposures was 1.0 arcsec. The telescope was offset between the indi- vidual exposures so that the sky background could be used to flat-field the frame. This procedure also removed the effects of cos- mic rays and blemishes in the CCD. More than 97% of the objects seen in this sub- field are galaxies. For the brighter galax- ies, there is good agreement between the galaxy counts of Tyson (1988, Astron. J., 96, 1) and the NTT counts for the brighter galax- ies. -
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A&A 583, A85 (2015) Astronomy DOI: 10.1051/0004-6361/201526795 & c ESO 2015 Astrophysics Reaching the boundary between stellar kinematic groups and very wide binaries III. Sixteen new stars and eight new wide systems in the β Pictoris moving group F. J. Alonso-Floriano1, J. A. Caballero2, M. Cortés-Contreras1,E.Solano2,3, and D. Montes1 1 Departamento de Astrofísica y Ciencias de la Atmósfera, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, 28040 Madrid, Spain e-mail: [email protected] 2 Centro de Astrobiología (CSIC-INTA), ESAC PO box 78, 28691 Villanueva de la Cañada, Madrid, Spain 3 Spanish Virtual Observatory, ESAC PO box 78, 28691 Villanueva de la Cañada, Madrid, Spain Received 19 June 2015 / Accepted 8 August 2015 ABSTRACT Aims. We look for common proper motion companions to stars of the nearby young β Pictoris moving group. Methods. First, we compiled a list of 185 β Pictoris members and candidate members from 35 representative works. Next, we used the Aladin and STILTS virtual observatory tools and the PPMXL proper motion and Washington Double Star catalogues to look for companion candidates. The resulting potential companions were subjects of a dedicated astro-photometric follow-up using public data from all-sky surveys. After discarding 67 sources by proper motion and 31 by colour-magnitude diagrams, we obtained a final list of 36 common proper motion systems. The binding energy of two of them is perhaps too small to be considered physically bound. Results. Of the 36 pairs and multiple systems, eight are new, 16 have only one stellar component previously classified as a β Pictoris member, and three have secondaries at or below the hydrogen-burning limit. -
11–6–03 Vol. 68 No. 215 Thursday Nov. 6, 2003 Pages 62731–63010
11–6–03 Thursday Vol. 68 No. 215 Nov. 6, 2003 Pages 62731–63010 VerDate jul 14 2003 19:08 Nov 05, 2003 Jkt 203001 PO 00000 Frm 00001 Fmt 4710 Sfmt 4710 E:\FR\FM\06NOWS.LOC 06NOWS 1 II Federal Register / Vol. 68, No. 215 / Thursday, November 6, 2003 The FEDERAL REGISTER (ISSN 0097–6326) is published daily, SUBSCRIPTIONS AND COPIES Monday through Friday, except official holidays, by the Office of the Federal Register, National Archives and Records PUBLIC Administration, Washington, DC 20408, under the Federal Register Subscriptions: Act (44 U.S.C. Ch. 15) and the regulations of the Administrative Paper or fiche 202–512–1800 Committee of the Federal Register (1 CFR Ch. I). The Assistance with public subscriptions 202–512–1806 Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402 is the exclusive distributor of the official General online information 202–512–1530; 1–888–293–6498 edition. Periodicals postage is paid at Washington, DC. Single copies/back copies: The FEDERAL REGISTER provides a uniform system for making Paper or fiche 202–512–1800 available to the public regulations and legal notices issued by Assistance with public single copies 1–866–512–1800 Federal agencies. These include Presidential proclamations and (Toll-Free) Executive Orders, Federal agency documents having general FEDERAL AGENCIES applicability and legal effect, documents required to be published by act of Congress, and other Federal agency documents of public Subscriptions: interest. Paper or fiche 202–741–6005 Documents are on file for public inspection in the Office of the Assistance with Federal agency subscriptions 202–741–6005 Federal Register the day before they are published, unless the issuing agency requests earlier filing. -
The UV Perspective of Low-Mass Star Formation
galaxies Review The UV Perspective of Low-Mass Star Formation P. Christian Schneider 1,* , H. Moritz Günther 2 and Kevin France 3 1 Hamburger Sternwarte, University of Hamburg, 21029 Hamburg, Germany 2 Massachusetts Institute of Technology, Kavli Institute for Astrophysics and Space Research; Cambridge, MA 02109, USA; [email protected] 3 Department of Astrophysical and Planetary Sciences Laboratory for Atmospheric and Space Physics, University of Colorado, Denver, CO 80203, USA; [email protected] * Correspondence: [email protected] Received: 16 January 2020; Accepted: 29 February 2020; Published: 21 March 2020 Abstract: The formation of low-mass (M? . 2 M ) stars in molecular clouds involves accretion disks and jets, which are of broad astrophysical interest. Accreting stars represent the closest examples of these phenomena. Star and planet formation are also intimately connected, setting the starting point for planetary systems like our own. The ultraviolet (UV) spectral range is particularly suited for studying star formation, because virtually all relevant processes radiate at temperatures associated with UV emission processes or have strong observational signatures in the UV range. In this review, we describe how UV observations provide unique diagnostics for the accretion process, the physical properties of the protoplanetary disk, and jets and outflows. Keywords: star formation; ultraviolet; low-mass stars 1. Introduction Stars form in molecular clouds. When these clouds fragment, localized cloud regions collapse into groups of protostars. Stars with final masses between 0.08 M and 2 M , broadly the progenitors of Sun-like stars, start as cores deeply embedded in a dusty envelope, where they can be seen only in the sub-mm and far-IR spectral windows (so-called class 0 sources). -
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. -
Orders of Magnitude (Length) - Wikipedia
03/08/2018 Orders of magnitude (length) - Wikipedia Orders of magnitude (length) The following are examples of orders of magnitude for different lengths. Contents Overview Detailed list Subatomic Atomic to cellular Cellular to human scale Human to astronomical scale Astronomical less than 10 yoctometres 10 yoctometres 100 yoctometres 1 zeptometre 10 zeptometres 100 zeptometres 1 attometre 10 attometres 100 attometres 1 femtometre 10 femtometres 100 femtometres 1 picometre 10 picometres 100 picometres 1 nanometre 10 nanometres 100 nanometres 1 micrometre 10 micrometres 100 micrometres 1 millimetre 1 centimetre 1 decimetre Conversions Wavelengths Human-defined scales and structures Nature Astronomical 1 metre Conversions https://en.wikipedia.org/wiki/Orders_of_magnitude_(length) 1/44 03/08/2018 Orders of magnitude (length) - Wikipedia Human-defined scales and structures Sports Nature Astronomical 1 decametre Conversions Human-defined scales and structures Sports Nature Astronomical 1 hectometre Conversions Human-defined scales and structures Sports Nature Astronomical 1 kilometre Conversions Human-defined scales and structures Geographical Astronomical 10 kilometres Conversions Sports Human-defined scales and structures Geographical Astronomical 100 kilometres Conversions Human-defined scales and structures Geographical Astronomical 1 megametre Conversions Human-defined scales and structures Sports Geographical Astronomical 10 megametres Conversions Human-defined scales and structures Geographical Astronomical 100 megametres 1 gigametre -
Meteorok Észlelések (Szeptember-Október) 28 a Sülysápi MMTÉH-Találkozóról 31 Meteoros Hírek, Érdekességek 32 a "Rejtélyes" 191^
Gondolatok egy amatőr évkönyvről 1 Mit tud egy kis távcső? 3 Tapasztalatok kis Zeiss- távcsövekkel 6 Két műszer az NDK-ból 8 Ifjúsági csillagásztábor az NSZK-ban 9 Csillagászati megfigyelések és a légkör III. 12 "Csillagfigyelők" Japánban 15 Csillagászati hírek 16 Megfigyelések Hold (november) 21 Nap (november) 25 Bolygók Merkúr-Uránusz-Neptunusz- Plútó — 1988 26 Meteorok Észlelések (szeptember-október) 28 A sülysápi MMTÉH-találkozóról 31 Meteoros hírek, érdekességek 32 A "rejtélyes" 191^. évi Szabolcs megyei meteorhullás 35 Csillagfedések 38 Változócsillagok Észlelések (október-november) 39 Üj észlelési program: fedési változók megfigyelése 42 Az IU Aurigae hármas rendszere 43 RS Cygni 1980-1987 45 Mély-ég (október-november) 49 Az Orion kettőscsillagai 51 Jelenségnaptár (február)__________53 89.2392 - TIT-Nyomda, Budapest XIX. évf. 1. (151.) szám F.v.: dr. Préda Tibor Vol. 19, No. 1 (whole number 151) Formátum: A/5 - Példányszám: 1100 Terjedelem: 3,25 (A/5) ív Lapzárta: január 4._______________ Gondolatok egy amatőr évkönyvről A múlt év novemberében, tehát nemcsak időben, hanem aránylag jó előre, meg jelent a könyvesboltok kirakatában az 1989-re szóló Csillagászati évkönyv. A korábbi évek nagy időbeli csúszásaihoz képest ez számottevő érdem, de jó szerivel ez az egyetlen pozitívum, amit a magyar évkönyvről elmondhatunk. A Csillagászati évkönyv, anelynek tartalma, felépítése 38 év alatt nem válto zott, csupán vékonyabb lett, aligha elégíti ki a hazai műkedvelő csillagá szok igényeit! Az évkönyv az előző évekhez képest nem változott: tartalmazza a Nap és a Hold adatait (kelte, nyugta, koordinátái, látszó sugár stb); a heliografi- kus koordináta-adatokat, a Merkúr, a Vénusz, a Mars negvilágítottsági szá zalékát és a Szaturnusz gyűrűinek adatait; a nagybolygók ekvatoriális és heliocentrikus koordinátáit, látszó sugarát, fényességét stb; a Jupiter holdjainak jelenségeit, a Mars és a Jupiter centrálmeridián adatait; a 4,0- nál fényesebb csillagok adatait. -
330 — 15 June 2020 Editor: Bo Reipurth ([email protected]) List of Contents the Star Formation Newsletter Interview
THE STAR FORMATION NEWSLETTER An electronic publication dedicated to early stellar/planetary evolution and molecular clouds No. 330 — 15 June 2020 Editor: Bo Reipurth ([email protected]) List of Contents The Star Formation Newsletter Interview ...................................... 3 Abstracts of Newly Accepted Papers ........... 6 Editor: Bo Reipurth [email protected] Abstracts of Newly Accepted Major Reviews .. 42 Associate Editor: Anna McLeod Meetings ..................................... 45 [email protected] Summary of Upcoming Meetings .............. 47 Technical Editor: Hsi-Wei Yen [email protected] Editorial Board Joao Alves Cover Picture Alan Boss Jerome Bouvier The North America/Pelican and the Cygnus-X re- Lee Hartmann gions are here seen in an ultradeep wide field image. Thomas Henning The region was imaged by Alistair Symon, who has Paul Ho uploaded to his website both this overview as well Jes Jorgensen as a much more detailed 22-image mosaic with a to- Charles J. Lada tal of 140 hours exposure time in Hα (52 hr, green), Thijs Kouwenhoven [SII] (52 hr, red), and [OIII] (36 hours, blue). This Michael R. Meyer is likely the deepest wide-field image taken of the Ralph Pudritz Cygnus Rift region. Higher resolution images are Luis Felipe Rodríguez available at the website below. Ewine van Dishoeck Courtesy Alistair Symon Hans Zinnecker http://woodlandsobservatory.com The Star Formation Newsletter is a vehicle for fast distribution of information of interest for as- tronomers working on star and planet formation and molecular clouds. You can submit material for the following sections: Abstracts of recently Submitting your abstracts accepted papers (only for papers sent to refereed journals), Abstracts of recently accepted major re- Latex macros for submitting abstracts views (not standard conference contributions), Dis- and dissertation abstracts (by e-mail to sertation Abstracts (presenting abstracts of new [email protected]) are appended to Ph.D dissertations), Meetings (announcing meet- each Call for Abstracts. -
Space Telescope Science Institute Investigators Title
PROP ID: 16100 Principal Investigator: Julia Roman-Duval PI Institution: Space Telescope Science Institute Investigators Title: ULLYSES SMC O7-O9 Giants COS Cycle: 27 Allocation: 8 orbits Proprietary Period: 0 months Program Status: Program Coordinator: Tricia Royle Visit Status Information None PROP ID: 16101 Principal Investigator: Julia Roman-Duval PI Institution: Space Telescope Science Institute Investigators Title: ULLYSES SMC B1 Stars COS Cycle: 27 Allocation: 12 orbits Proprietary Period: 0 months Program Status: Program Coordinator: Tricia Royle Visit Status Information None PROP ID: 16102 Principal Investigator: Julia Roman-Duval PI Institution: Space Telescope Science Institute Investigators Title: SMC B2 to B4 Supergiants COS/STIS Cycle: 27 Allocation: 16 orbits Proprietary Period: 0 months Program Status: Program Coordinator: Tricia Royle Contact Scientist: Sergio Dieterich Visit Status Information None PROP ID: 16103 Principal Investigator: Julia Roman-Duval PI Institution: Space Telescope Science Institute Investigators Title: ULLYSES SMC O Stars COS 1096 Cycle: 27 Allocation: 17 orbits Proprietary Period: 0 months Program Status: Program Coordinator: Tricia Royle Contact Scientist: Julia Roman-Duval Visit Status Information None PROP ID: 16104 Principal Investigator: Julia Roman-Duval PI Institution: Space Telescope Science Institute Investigators Title: ULLYSES UV Pre-imaging of Sextans A and NGC 3109 Targets Cycle: 27 Allocation: 2 orbits Proprietary Period: 0 months Program Status: Program Coordinator: Tricia Royle Visit -
Results Astronomical Observations
R E S U L T S I RVAT ASTRONOM CAL OBSE IONS, MADE A T THE OBSERVATORY OF THE I E UN V RSITY, D U R H A M , N 184-6 TO UL 1848 FROMJA UARY, , J Y, , UN DEB THE DI RECTI O N O F L B . H E V . L L F T R . R E D . s TE M P E C H EV A I ER, , A _ PRO F B SO B O E A N D A STRO N O I Y I N THE UN I V ERS I TY O F DURHA M . R EV . N H N B . A . THE ROBERTA CHORT OMPSO , O BS ERV ER I N THE UN I V ERS I TY. D U R H A M PRIN D P HUMBLE. TED BY THE E! EC UTO RS O F E W . IN TRODUCTION . HE servat r of the niversi of Durham was built in 1841 rin T Ob oy U t , ci all y p p y h ubscri tion . The servati ns un er t e eneral su erint n byprivate s p Ob o , d g p e den ce of the r fess r of at ematics and str n m are c n uc e an O server P o o M h A oo y, od tdby b , Th f ll win a es c ntain the results resident at the Observatory . e oo gpg o of O bser ns ma e et ween anuar 1846 and ul 1848 . -
Magnetospheric Accretion on the T Tauri Star BP Tauri J.-F
Magnetospheric accretion on the T Tauri star BP Tauri J.-F. Donati, M. M. Jardine, S. G. Gregory, P. Petit, F. Paletou, J. Bouvier, C. Dougados, F. Ménard, A. C. Cameron, T. J. Harries, et al. To cite this version: J.-F. Donati, M. M. Jardine, S. G. Gregory, P. Petit, F. Paletou, et al.. Magnetospheric accre- tion on the T Tauri star BP Tauri. Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P - Oxford Open Option A, 2008, 386, pp.1234. 10.1111/j.1365- 2966.2008.13111.x. hal-00398497 HAL Id: hal-00398497 https://hal.archives-ouvertes.fr/hal-00398497 Submitted on 15 Dec 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Mon. Not. R. Astron. Soc. 386, 1234–1251 (2008) doi:10.1111/j.1365-2966.2008.13111.x Magnetospheric accretion on the T Tauri star BP Tauri J.-F. Donati,1† M. M. Jardine,2† S. G. Gregory,2† P. Petit,1† F. Paletou,1† J. Bouvier,3† C. Dougados,3† F. Menard, ´ 3† A. C. Cameron,2† T. J. Harries,4† G. A. J. -
Hungarian Academy of Sciences CENTRAL RESEARCH INSTITUTE for PHYSICS
KFKI 1990 50/C В. LUKÁCS SZ. BÉRCZI I. MOLNÁR G. PAÁL EVOLUTION: FROM COSMOGENESIS TO BIOGENESIS Hungarian Academy of Sciences CENTRAL RESEARCH INSTITUTE FOR PHYSICS BUDAPEST KFKI-1990-50/C PREPRINT EVOLUTION: FROM COSMOGENESIS TO BIOGENESIS B. LUKÁCS. SZ. BÉRCZI, I. MOLNÁR, G. PAÁL (eds.) Central Research institute for Physics H-1526 Budapest 114. P.O.B. 49, Hungary T.F. Farkas: Structures under Crystallization. (1980) The material of the t8 Evolution Symposium of the Evolution of Matter Subcommittee of the Qeonomy Scientific CommiUee of the Hungarian Academy of Science. 28 31 May, 1990. HU ICSN 0368 5330 В. Lukács, Sz. Bérezi. I. Molnár, Q. Paál (eds.): Evolution: from cosmogenesis to biogenesis KFKI 1990 50/C ABSTRACT The Volume contains the material of an interdisciplinary evolution symposium The purpose was to shed some light on possible connections between steps of evolution of matter on different levels of organisation. The topics involved are as follow: cosmogenesis; galactic and stellar evolution, formation and evolution of the solar system; global atmospheric and tectonic changes of Earth; viral evolution; phytogeny and evolution of terrestrial lile; evolution of neural system; hominization The material also includes some discussions of the underlying phenomena and laws of Nature. Б. Лукач, С, Берци, И. Молнар, Г. Паал (ред.): Эволюция от космогенезиса до биогенезиса. KFKI-1990-50/C АННОТАЦИЯ Сборник содержит материалы интердисциплинарного симпозиума по эволюции. Целью симпозиума являлось выяснение связи между шагами эволюции материи на раз ных уровнях организации. Были затронуты следующие темы: коемогенеэис, эволюция звезд и Солнечной системы, глобальная тектоника Земли, эволюция атмосферы Земли, эволюция вирусов, филогенезис, эволюция жизни, эволюция нервной системы, гомини- эация, термодинамические аспекты эволюции.