Limpar
3.551 resultados

Acesso aberto

Tipo do recurso

Tipo de base de dados

Ano de criação

Produção nacional

Revisado por pares

Áreas

Idioma

Editores

Livro

Springer Link

Jornais Acesso aberto

CUTHBERT LAWS., M. STURGE GRETTON, By Our Parliamentary Correspondent., NORTHCLIFFE., ARTHUR STANLEY, Chairman, Central,

... Admiralty Division. Navigating Without Lights: Important Decision. The Algol., Chancery Division. Lord Blythswood's Will: 51 Codicils. ...

1917 - Gale Group | TDA

Artigo Acesso aberto Revisado por pares

Sun Mi Chung, J. J. Drake, V. Kashyap, Li Wei Lin, Peter W. Ratzlaff,

... of Chandra High Energy Transmission Grating spectra of Algol, we clearly detect Doppler shifts caused by the orbital motion of Algol B. These data provide the first definitive proof that the X-ray emission of Algol is dominated by the secondary, in concordance with expectations that Algol A (B8) is X-ray dark. The measured ... Rsolar, instead of 11.5 Rsolar for the Algol B center of mass. This could be caused ... a small contribution of X-ray flux from Algol A (10-15%), possibly through accretion. The more ...

Tópico(s): Astrophysics and Star Formation Studies

2004 - IOP Publishing | The Astrophysical Journal

Jornais Acesso aberto

Waldemar Januszczak, Sally Brock, V S, Professor Gideon Garter, Jonathan Miller, Ferdinand Mount, Domimique Coughlin, Frank Bill, Peter Sharkey, Dylan Jones, Michael Hubble, Martin James, Mark Edeards, Rosie Millard, Kate Rhall, D R Kerr, Isabella Tree, Jane Ridley, David Hewson, Hugh Canning, Minette, Ann Clwyd Mp, Andrew Oswald, S L, Sarah Dempster, Tim Lott, Paul Bailey, E Sb, Nicholas Hellen, Roger Tilbury, Christopher Morgan, Allen Stanley, Alicia Wyllie, Danny O'Brien, Pete Griffiths, Colin Smith, Michael Wright, Alerks Sierz, Claudia Navone, Bryan Appleyard, Tom Penglaze, John Elliott, Nicholas Walsh, Maurice Chittenden, Richard Brooks Arts Editor, Eliza Griswold, Anne Roiphe, Godfrey Smith, Paul Rowan, Jacqui Goddard, Howard Jacobson, Liam Clarke, Joe Cawley, Peter Schmeichel, Graham Norwood, David Budworth, Simon Sebag Montefiore, Philip Pullman, T H, Sarah Baxter, Victoria Stanley, Pierre Richterich, Monsieur Mangetout, Jason Dawe, Sian Griffiths, Dan Hlpgrave, Chris Tomlinson, Jonathan Northcroft, John Thornton, Hala Jaber, Jon Snow, Matthew Wall, C G, Frank Parker, Clarkson, Paula Radcliffe, G H J Leicester, Hamish Stevenson, Cathi Hanauer, Caroline Gourlay, Jean Nixon, Lucy Hughes-Hallett, Reg Austin, E P, Andrew Sullivan, Carol Smillie, Clive Davis, Patrica Nicoi, Kay Parton, Finola Inger, Peter Batchelor, Geraldine Hackett, Michael Edmands, Cally Law, Alasdair Reid, Victoria Segal, Edward Porter, Anthony Peregrine, John Peel, Eben Black, Dave Pollard, Chris O'Donnell, Shelley von Strunckel, Brendan Bourne, Paul Donovan, E Cullman, Simon Fanshawe, Dan Isobel, Richard Brooks, David Leppard, Eben Black Chief Political Correspondent, Lois Rogers, David B, Susanna Jones, Katrina Manson, Oliver Caims, Diana Wright, Alice Douglas, Chris Partridge, Joyce Carol Oates, Natalie Graham, Pat Doncaster, S D, Keith Wheatley, David Walsh, Stephen Armstrong, Ray Gilpin, Mark Anstead, Michael Sheridan Far East Correspondent, Richard Woods, Ray Hutton, A A Gill, John Ware, David Sumner Smith, Theresa Dunlop, R H, Nigel Powell, Roger Dobson, Rebecca Hoar, Brian Doogan, R. Griffin, Dr Raj Persaud, Lois Rogers Medical Editor, Jonathan Futrell, Helen, Hugh Pearman, Seymour Rellsh, Tom Deveson, Robert Gorman, Joan Smith, Richard Lewis, John Dugdale, Barbara Hall, Royal Ballet, Jon Swain, Nicholas Rufford, Rob Hughes, John Peter, David Anderson, Dr Richard Osborne Consultant in Medical Oncology, J D, Martin Bell, Matt Wolf, David Smith, Nick Pitt, Marie Stubbs, Chris Carless, Elaine Joyce, Ateh Damachi, Claire Jamouille, Tom English, Nicholas Hellen Social Affairs Editor, Graham Rice, Marcus Tanner, Gary Lineker, L. Sherrin, Peter Watson, Stewart Lee, John O'Donnell, John Bilk, Lynne O'Donnell, Jeremy Guscott, Lydia Pearman, Tom Conran, Chris Woodhead, David Johnson, Mark Edwards, Susan Clark, Shaun Leavey Nfu Regional Director, Eric Stewart, Michael Winner, Sean Newsom, Raymond Keene, Alan Blackstone, Zoe Brennan, Marie Colvin, Simon Robson, Stephen Jones, Louise Armitstead, Nick Cain, Susan, Robert Elms, Sir Michael Quinlan, Danny Lee, Richard Rae, Liz Engel, Emma Tennant, Loise Armitstead, John P McCarthy, Niall Ferguson, Nicholas Rankin, John Waples, Bob Wilson, Stephen Pettitt, Jonathan Calvert, Joe Lovejoy, Tim Vanderpump, Dan Cairns, Hugh, Michael Clarke, David Smith Economics Editor, Penny Perrick, Simon Howard, Dominic Rushe, P B, Fred Redwood, Colin Feltwell, Bob Munro, Mike Broad, Frank Whitford, Kathryn Cooper, William Lewis, P D, Simon Whitworth, Lynne Truss, Andrew Porter, Tony Allen-Mills, Ariel Leve, Robert Sandall, Irwin Stelzer, Robert Hewison, Peter Wilson, Giles Coren, Charles Collingwood, David Dougill, Alun Michael Mp, Rachel Dobson, Geraldine Hackett Education Correspondent, Jeremy Clarkson, Richard Sharpe, David Cairns, Sir John Eliot Gardiner, Kathryn Lasky, Anthony Borg, John Young, Paula Robinson, Karl Troop, Roger Eglin, Dominique Coughlin, Peter Done managing director of Peninsula, Catherine Carey, Simon Mills, Lucinda Kemeny, Jasper Gerard, Derek Clements, Paul Driver, Ian Hawkey, Amber Cowan, Allicia Wyllie, James Hopkirk, Phil Baker, Gareth Huw Davis, Christina Lamb, Victoria O'Brien, Jim McHugh, Eva Gronbech, Douglas Alexander, Senay Boztas, Trisha Meili, Cosmo Landesman, K Wilkes, Dominic O'Connell, Andrew Holgate, M J, Caroline Donald, Rosemary Bailey, Colin McDowell, Liz Cacciottolo, John, Shane Watson, Kevin Sharpe, Jonathan Leake, Tony Blackburn, John Harlow, Simon Brooke, James Foxall, Claudia Croft, Sally Kinnes, Naomi Caine, Chris Baker, Rupert Steiner, Andrew Davidson, Paul Stephen Lubicz, Chris Gallagher, Matthew Goodman, India Knight, Paul Lee,

... best and brightest in stylish garden furniture Brionvega Algol television Design classics Crosby Whitefriars Barratt Crosby Take ...

2003 - Gale Group | Sunday Times HA GDA

Artigo Acesso aberto Revisado por pares

J. J. Drake,

Chandra Low Energy Transmission Grating Spectrograph observations of Algol have been used to determine the abundances of ... 1099. It is demonstrated that HR 1099 and Algol are coronal twins in many respects and that ... of C and N in the coronae of Algol and HR 1099 demonstrate that the surface abundances of Algol B have been strongly modified by CN processing, ... It is found that N is enhanced in Algol B by a factor of 3 compared with ... 1099. No C lines are detected in the Algol spectrum, indicating a C depletion relative to HR ...

Tópico(s): Astro and Planetary Science

2003 - IOP Publishing | The Astrophysical Journal

Livro

Springer Link

Jornais Acesso aberto

Eduard Heinrich Mayer, Dr. P. Grosser, F. Tisserand,

... Das Winden Der Schlingpflanzen, Die Helligkeitsänderungen Des Sterns Algol Im Perseus, Elektrische Straßenbahnen, Die Beiden Großen Erdbeben ...

1895 - Gale Group | NCCO SciTechMed 2 of 2

Artigo

U. G. Schlösser,

... Chlorella protothecoides Krüger var. Arch. Hydrobiol. Suppl. 67 (Algol. Stud. 37) (1984), 401–408. Albertano, P., Pollio, ... from creeks in the midland area Spessart (Germany). Algol. Stud. 64 (1991), 357–360. Burger-Wiersma, T., ... Neue und wenig bekannte Eugleninen und Volvocalen. Revue Algol. 3 (1962), 162–202. Christen, H. R. - Zur ... pluvialis and its allies; III: Organic nutrition. Revue Algol. 4 (1961), 247–258. Ettl, H. - Beitrag zur ... zu den Grünalgen II). Arch. Hydrobiol. Supplement 60 (Algol. Stud. 29) (1982), 345–374. Ettl, H. und ...

Tópico(s): Bryophyte Studies and Records

1994 - Thieme Medical Publishers (Germany) | Botanica Acta

Livro

Springer Link

Jornais Acesso aberto

M. Cadet De Vaux, M. Thouret, M. Pallas, M. Du Carla, M. Marggraf, M. Le Baron De Dietrich,

... Eau En Air Par Prieftley , Fur L' Étoile Algol, & Fur Un Nouvel Echappement Libre, Observation Sur Un ...

1783 - Gale Group | NCCO-STM 1of2

Artigo Acesso aberto Revisado por pares

J. Tomkin, D. L. Lambert,

... Citation NASA/ADS Detection of the secondary of Algol. Tomkin, J. ; Lambert, D. L. Abstract The first spectroscopic detection of Algol B is reported. The Na D lines of the secondary of Algol are identified on low-noise spectra, and measurements ... ratio as well as the individual masses of Algol A, B, and C. Solutions for the orbital ... 6) km/s for the semiamplitude of the Algol B velocity curve and -9 (+ or - 11) km/ ... 4.6 + or - 0.1. The masses of Algol A, B, and C are estimated to be ... 7 solar masses, respectively. It is concluded that Algol B fills its Roche lobe and that mass ...

Tópico(s): Astronomy and Astrophysical Research

1978 - IOP Publishing | The Astrophysical Journal

Artigo Acesso aberto Revisado por pares

A. Retter, Mercedes T. Richards, Kinwah Wu,

Extensive radio data of two Algol systems and two RS CVn binaries were re-analyzed. We found evidence for a new periodicity that we interpret as a superhump in Algol, in which it may have been expected according ... radio and the first observation of superhumps in Algol systems. According to our result, the accretion disk in Algol precesses in spite of its non-Keplerian nature ... disks in compact binaries.We propose that in Algol systems with short orbital periods, the disk is ... Our proposed model for the magnetic activity in Algol systems provides a simple explanation to the observed ...

Tópico(s): Stellar, planetary, and galactic studies

2005 - IOP Publishing | The Astrophysical Journal

Artigo Revisado por pares

Mercedes T. Richards,

... influential in the study of mass transfer in Algol‐type interacting binaries. The Algols contain a hot blue dwarf star with a magnetically‐active late‐type companion. In the close Algols, the gas stream flows directly into the photosphere ... impact with that star. Doppler tomograms of the Algols have been produced from over 2500 time‐resolved ... associated with the cool, mass‐losing companion. Some Algol systems alternate between streamlike and disk‐like states, ... direct evidence of active mass transfer within the Algols. This work produced the very first images of ...

Tópico(s): Astrophysics and Star Formation Studies

2004 - Wiley | Astronomische Nachrichten

Artigo Acesso aberto Revisado por pares

W. Van Rensbergen, J. P. De Grève, N. Mennekens, Kim Jansen, C. De Loore,

... binary characteristics better than with conservative evolution. Since Algols are eclipsing binaries, the distribution of their orbital ... the observed distributions of the system parameters of Algol-type semidetached systems. Methods. Our calculations reveal the amount of time that an Algol binary lives with a well-defined value of ... distribution of mass ratios and orbital periods of Algols. Results. Binaries with a late B-type initial ... way. Conservative binary evolution predicts only ∼12% of Algols with a mass ratio q above 0.4. ...

Tópico(s): Gamma-ray bursts and supernovae

2011 - EDP Sciences | Astronomy and Astrophysics

Jornais Acesso aberto

J. M. B. Crawford, James Brock, Valentine Cunningham, Joan Bakewell, Timothy C. F. Stunt, Edward Mendelson, Geoffrey Moorhouse, Edmund Rubbra, Susan Campbell, Peter Buckman, Richard Combs, Keith Kyle, Anne Pashley, Máire Davies, Michael Levey, Alan Ryan, Harold Truscott, Barry Cowan, Lionel Miskin, John Vaizey, Algol, Donald Davie, Harry Thompson, Davina Faversham, J. R. Ackerley, John Elsom, Robert Blake,

The Listener Prospects fro the National Gallery Contents Next week Langham Diary Worlds Reports The Popularity of Portugal The Future of Northern Ireland— ...

1974 - Gale Group | The Listener GDA

Artigo Acesso aberto Revisado por pares

Ahmet Dervişoğlu, Christopher A. Tout, C. İbanoǧlu,

... angular momentum evolution of the accreting components of Algol-type binary stars. In wider Algols the accretion is through a disc so that ... momentum and mass loss, the gainers in classical Algols have radiative envelopes. We further find that normal ... required to spin-down the gainers in classical Algol systems. We consider generation of magnetic fields in ... mass stars, such as the primaries of the Algols. Differential rotation, induced by the accretion itself, may ... slow rotation of the gainers in the classical Algol systems is explained by a balance between the ...

Tópico(s): Astro and Planetary Science

2010 - Oxford University Press | Monthly Notices of the Royal Astronomical Society

Artigo Revisado por pares

A. Erdem, F. Soydugan, S.S. Doğru, B. Özkardeş, D. Doğru, M. Tüysüz, O. Demirçan,

... of the orbital period variations of five neglected Algol-type eclipsing binaries TT And, V342 Aql, RW ... secular period increases as expected in mass transferring Algols. However, due to short time coverage of the ... for TT And and TW Lac. Therefore, the Algol systems RW Cap and V342 Aql have the ... in Case AB type, while those of the Algol systems TT And and TW Lac display the ... of the orbital period variations of all five Algol systems can be due to either by the ... components. The possible third bodies in all five Algol binaries would have masses larger than one solar ...

Tópico(s): Astrophysics and Star Formation Studies

2007 - Elsevier BV | New Astronomy

Jornais Acesso aberto

Edwin Morgan, Paul Callan, David Dimbleby, Mervyn Jones, D. A. N. Jones, Clancy Sigal, Roy Hattersley, Stephen Koss, Peter Kemp, Dr. D. S. McLaren, W. G. L. Sutton, Hugo Cole, Patrick Hannan, George Szirtes, Paul Overy, James Cox, John Hatch, John Dunn, Timothy Day, K. St Pavlowitch, Fritz Spiegl, Ben Pimlott, Algol, Gavin Millar, M. R. Griffiths, Andro Linklater, Esmond Wright, Ray Gosling, Joan Barton, John Elsom, Bernard Levin,

The Listener The Listener Afrikaner attitudes 'Apartheid as you came to know it is dying and dead' Countdown to the Olympics 'An atmosphere of control and ...

1980 - Gale Group | The Listener GDA

Artigo Acesso aberto Revisado por pares

G. Gatewood, Joost Kiewiet de Jonge, W. D. Heintz,

... NASA/ADS Astrometric Studies in the Region of Algol Gatewood, George ; de Jonge, Joost Kiewiet ; Heintz, Wulff ... masses of the components of the triple star Algol (Beta Persei) are derived from photographic and electronic ... The newly derived weighted mean trigonometric parallax of Algol is now +0.0343 +/- 0.00085 corresponding to ... 0.054 mag. The total mass of the Algol system is estimated at 6.05 +/- 0.45 ... that the visual band interferometric studies of the Algol system have the AB and C components interchanged. ... Electro-Optical Photography; Parallax; Astronomy; ASTROMETRY; STARS: INDIVIDUAL: ALGOL full text sources ADS | data products SIMBAD (17)

Tópico(s): History and Developments in Astronomy

1995 - Institute of Physics | The Astronomical Journal

Artigo Acesso aberto Revisado por pares

Robert A. Stern, J. R. Lemen, J. H. M. M. Schmitt, J. P. Pye,

... Metrics Export Citation NASA/ADS EUVE Observations of Algol: Detection of a Continuum and Implications for the ... extreme ultraviolet spectrum of the prototypical eclipsing binary Algol (beta Per), obtained with the spectrometers on the Extreme Ultraviolet Explorer (EUVE). The Algol spectrum in the 80-350 A range is ... with a cosmic abundance plasma, but only if Algol's quiescent corona is dominated by material at ... by prior X-ray observations of the quiescent Algol spectrum. Since the coronal (Fe/H) abundance is ...

Tópico(s): Astro and Planetary Science

1995 - IOP Publishing | The Astrophysical Journal