Výsledky vyhledávání - "P. F. Younger"

Akademický článek

Chemistry, Growth, and Fate of the Unique, Short‐Lived (2019–2020) Water Lake at the Summit of Kīlauea Volcano, Hawaii

Autor: P. A. Nadeau, S. Hurwitz, S. Peek, A. H. Lerner, E. F. Younger, M. R. Patrick, D. E. Damby, R. B. McCleskey, P. J. Kelly

Publikováno v: Geochemistry, Geophysics, Geosystems, Vol 25, Iss 3, Pp n/a-n/a (2024)

Abstract Less than a year after the 2018 Kīlauea caldera collapse and eruption, water appeared in newly deepened Halemaʻumaʻu crater. The lake—unprecedented in the written record—grew to a depth of ∼50 m before lava from the December 2020 er

Externí odkaz: https://doaj.org/article/34f8d902f567473e9721409533ff8ed3

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Akademický článek

CMR as the First Line Test Compared to Exercise ECG and SPECT in Patients with Stable Chest Pain: Insights from CE-MARC

Autor: Giandomenico Bisaccia, MD, Peter Swoboda, John F. Younger, MD, MB, Neil Maredia, MD, Catherine J. Dickinson, MD, Julia M. Brown, MSc, BSc, Chiara Bucciarelli-Ducci, MD, PhD, Sven Plein, MD, PhD, John P Greenwood, MD, PhD

Publikováno v: Journal of Cardiovascular Magnetic Resonance, Vol 26, Iss , Pp 100167- (2024)

Externí odkaz: https://doaj.org/article/77bd0e1126724140b852b9ff9507586d

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The ASTRA Spectrophotometer: A July 2004 Progress Report

Autor: Austin F. Gulliver, P. F. Younger, L. Boyd, D. Epand, Saul J. Adelman, Barry Smalley, J. S. Pazder

Publikováno v: arXiv.org

A cross-dispersed spectrophotometer with CCD detector and its automated 0.5-m telescope at the Fairborn Observatory, now under construction, should begin observations in 6 to 9 months. The Citadel ASTRA Telescope will be able to observe Vega the prim

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e41b2384f642ab3672d7b794283d07d3

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Steps toward determination of the size and structure of the broad-line region in active nuclei. 7: Variability of the optical spectrum of NGC 5548 over years

Publikováno v: The Astrophysical Journal. 425:622

We report on the results of a continuation of a large monitoring program of optical spectroscopy of the Seyfert 1 galaxy NGC 5548. The new observations presented here were obtained between 1990 December and 1992 October, and extend the existing datab

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ad63796f063d133775b8a3640fcf4e88
https://doi.org/10.1086/174009

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A search for OB associates near southern long-period Cepheids. IV - XY Carinae, GT Carinae, WZ Sagittarii, and SW Velorum

Autor: Douglas Forbes, P. F. Younger, Sidney van den Bergh, David G. Turner, T. A. Danks

Publikováno v: The Astrophysical Journal Supplement Series. 85:119

We report UBV photometry for fields surrounding four long-period Cepheids in the Southern Milky Way. No potential early-type companions are detected around XY Car, which appears to be relatively isolated. However, an anonymous group of nine B-type an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0d23b547dea021dc126e964f1a96de43
https://doi.org/10.1086/191756

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Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. II - an intensive study of NGC 5548 at optical wavelengths

Autor: Anita L. Cochran, Richard W. Pogge, R. Bertram, H. R. Miller, M. Dietrich, R. M. Wagner, E. I. Rosenblatt, R. J. Leacock, Horace A. Smith, D. Bond, C. M. Gaskell, Beverley J. Wills, N. J. Lame, A. C. Sadun, C. L. M. Oliveira, Sylvain Veilleux, David Crampton, U. Thiele, Alexei V. Filippenko, Wei-Hsin Sun, Edwin S. Barker, Hagai Netzer, John P. Huchra, T. A. Boroson, Klaus J. Fricke, Ari Laor, Enrique Pérez, Martin Elvis, J. A. Christensen, D. Maoz, Paul S. Smith, Belinda Jane Wilkes, Thomas J. Balonek, N. G. Bochkarev, Jill Bechtold, Ray J. Weymann, Joseph C. Shields, A. P. Koratkar, Simon L. Morris, M. A. Malkan, P. F. Younger, Alla I. Shapovalova, Leslie Saddlemyer, Derek Wills, Jeffrey Penfold, Gordon M. MacAlpine, S. R. Sawyer, Ross D. Cohen, Julian H. Krolik, W. Romanishin, T. E. Carone, Wolfram Kollatschny, T. J. Turner, Bradley M. Peterson, M. J. Bolte, M. V. Penston, Kirk T. Korista, M. W. Richmond, Jules P. Halpern, M. T. Carini, J. B. Hutchings, Alex G. Smith, A. Ferguson, S. D. Clements

Publikováno v: The Astrophysical Journal. 368:119

A large, international program of ground-based optical spectroscopy and photometry of the variable Seyfert 1 galaxy NGC 5548 undertaken in support of an IUE monitoring campaign is described. This contribution presents the data base and describes the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2744a4730f61368d26f80ced2b225c56
https://doi.org/10.1086/169675

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The interstellar extinction curve from 4000 Å to 6500 Å

Autor: G. A. H. Walker, J. B. Hutchings, P. F. Younger

Publikováno v: Symposium - International Astronomical Union. 36:52-56

Interstellar extinction curves (mext vs. 1/λ) of 20 Å resolution have been obtained at the DAO from photoelectric scanner observations in the range 4000 Å to 5000 Å for five stars, and of 50 Å resolution for four stars in the range 4000 Å to 65

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::71017e0a29c2a40c68fd262f1a6b3ae4
https://doi.org/10.1017/s0074180900101846

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The Interstellar Extinction Curve from 4000 Å to 6500 Å

Autor: P. F. Younger, J. B. Hutchings, Gordon A. H. Walker

Publikováno v: Ultraviolet Stellar Spectra and Related Ground-Based Observations ISBN: 9789401032957

Interstellar extinction curves (m ext vs. 1/λ) of 20 A resolution have been obtained at the DAO from photoelectric scanner observations in the range 4000 A to 5000 A for five stars, and of 50 A resolution for four stars in the range 4000 A to 6500 A

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d5926fda64ffe17b97e7e5e10f496b11
https://doi.org/10.1007/978-94-010-3293-3_11

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A search for OB associations near southern long-period Cepheids. II - CT Carinae, UU Muscae, VZ Puppis, SV Velorum, and EZ Velorum

Autor: P. F. Younger, G. Alcaino, S. van den Bergh, E. B. F. Brosterhus

Publikováno v: The Astrophysical Journal Supplement Series. 53:765

Photometrie UBV des champs entourant 5 cepheides a longue periode de la Voie Lactee australe. CT car pourrait etre dans une riche association rougie (E B−V =0,6). Ou bien les membres suspectes de l'association pourraient etre des etoiles F faibleme

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a39d19b9f751627d5f0bf27352044da1
https://doi.org/10.1086/190909

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A search for OB associations near long-period Cepheids. III U Carinae, XZ Carinae, QY Centauri, VX Crucis, and AA Normae

Autor: S. van den Bergh, P. F. Younger, David G. Turner

Publikováno v: The Astrophysical Journal Supplement Series. 57:743

Aucune etoile de premier type n'est trouvee associee a la Cepheide de 38 jours U Car. XZ se situe a une distance comparable du complexe Car OB1, mais son appartenance a l'association n'est pas etablie par les donnees presentes. QY Cen et VX Cru ne so

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8f563c098ec73930b08912622683e0fd
https://doi.org/10.1086/191025

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