Zobrazeno 1 - 10
of 115
pro vyhledávání: '"Douglas A Welch"'
Autor:
Roee Partoush, Armin Rest, Jacob E. Jencson, Dovi Poznanski, Ryan J. Foley, Charles D. Kilpatrick, Jennifer E. Andrews, Rodrigo Angulo, Carles Badenes, Federica B. Bianco, Alexei V. Filippenko, Ryan Ridden-Harper, Xiaolong Li, Steve Margheim, Thomas Matheson, Knut A. G. Olsen, Matthew R. Siebert, Nathan Smith, Douglas L. Welch, A. Zenteno
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 2, p 119 (2024)
Light echoes give us a unique perspective on the nature of supernovae and nonterminal stellar explosions. Spectroscopy of light echoes can reveal details on the kinematics of the ejecta, probe asymmetry, and reveal details of ejecta interaction with
Externí odkaz:
https://doaj.org/article/b9a3e35f1c4249d6865e6bac4dbfa633
Autor:
Łukasz Wyrzykowski, Andrzej Udalski, Michael S. Bessell, P. Wils, Douglas L. Welch, Peter R. Wood, Przemek Mróz, Patrick Tisserand, Geoffrey C. Clayton, Devika Kamath
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 635, pp.A14. ⟨10.1051/0004-6361/201834410⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 635, pp.A14. ⟨10.1051/0004-6361/201834410⟩
It is increasingly suspected that the rare R Coronae Borealis (RCB) stars - hydrogen-deficient and carbon-rich supergiant stars - are the products of mergers of CO/He white-dwarf binary systems in the intermediate mass regime ($0.615000$ K). Forty of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a42bfd4e6dceb2f914e56559c117e77
https://hal.sorbonne-universite.fr/hal-02552126
https://hal.sorbonne-universite.fr/hal-02552126
Publikováno v:
Astronomy & Astrophysics. 655:A82
Context. The so-called "light echoes" of supernovae - the apparent motion of outburst-illuminated interstellar dust - can be detected in astronomical difference images; however, light echoes are extremely rare which makes manual detection an arduous
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9190f7f9add036094dd8daf063d2952
https://doi.org/10.1051/0004-6361/202039755
https://doi.org/10.1051/0004-6361/202039755
Autor:
Attay Kovetz, Dina Prialnik, Douglas L. Welch, James D. Neill, Edward A. Baltz, David Zurek, Tod R. Lauer, Joanna Mikolajewska, Michael M. Shara, Trisha F. Doyle, Juan P. Madrid, Ofer Yaron
The extensive grid of numerical simulations of nova eruptions of Yaron et al.(2005) first predicted that some classical novae might deviate significantly from the Maximum Magnitude - Rate of Decline (MMRD) relation, which purports to characterise nov
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d0c933ccbb35b6143a7324241a7bf4d
http://arxiv.org/abs/1702.05788
http://arxiv.org/abs/1702.05788
Autor:
Douglas L. Welch, Edward A. Baltz, James D. Neill, Trisha F. Doyle, Joanna Mikolajewska, David Zurek, Tod R. Lauer, Michael M. Shara, Juan P. Madrid
The Hubble Space Telescope has imaged the central part of M87 over a 10 week span, leading to the discovery of 32 classical novae and nine fainter, likely very slow and/or symbiotic novae. In this first in a series of papers we present the M87 nova f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a85d87e1bda96ab56dc841a8e99094e
Autor:
Brad E. Tucker, Lucas M. Macri, Wenlong Yuan, Jeffrey M. Silverman, Adam G. Riess, Ryan Chornock, Ryan J. Foley, Stefano Casertano, Ariel Goobar, Douglas L. Welch, Alexei V. Filippenko, Rahman Amanullah, Samantha L. Hoffmann
We present results of an optical search for Cepheid variable stars using the Hubble Space Telescope (HST) in 19 hosts of Type Ia supernovae (SNe Ia) and the maser-host galaxy NGC 4258, conducted as part of the SH0ES project (Supernovae and H0 for the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::850602c1bf9b37f520004198c70eb876
Autor:
Douglas L. Welch, Barbara Ercolano, Margaret Meixner, Joseph S. Gallagher, Ben Sugerman, Geoffrey C. Clayton, Roger Wesson, Jennifer E. Andrews, M. J. Barlow, J. Fabbri, Masaaki Otsuka
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 418:1285-1307
We present an analysis of multi-epoch observations of the Type II-P supernova SN 2004et. New and archival optical spectra of SN 2004et are used to study the evolution of the Hα and [O i] 6300-A line profiles between days 259 and 646. Mid-infrared im
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b9981b03f3ef501a1919b81717c113d
https://doi.org/10.1111/j.1365-2966.2011.19577.x
https://doi.org/10.1111/j.1365-2966.2011.19577.x
Autor:
Douglas L. Welch, P. Challis, A. C. Becker, G. Miknaitis, Dante Minniti, Nicholas B. Suntzeff, M. E. Huber, W. M. Wood-Vasey, K. H. Cook, J. L. Prieto, Alejandro Clocchiatti, Sergei Nikolaev, Lorenzo Morelli, K. A. G. Olsen, A. Garg, Armin Rest
Publikováno v:
Astronomical Journal
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
We present 2323 High-Amplitude \delta-Scuti (HADS) candidates discovered in the Large Magellanic Cloud (LMC) by the SuperMACHO survey (Rest et al. 2005). Frequency analyses of these candidates reveal that several are multimode pulsators, including 11
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33c10cb03dacc187ec4d17fa628d4fd2
https://doi.org/10.1088/0004-6256/140/2/328
https://doi.org/10.1088/0004-6256/140/2/328
Autor:
John E. Moores, Douglas L. Welch
Publikováno v:
Research Notes of the AAS. 2:34
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10319383f7816dc2d2546c90f601b4c7
https://doi.org/10.3847/2515-5172/aaa4be
https://doi.org/10.3847/2515-5172/aaa4be
Publikováno v:
Publications of the Astronomical Society of the Pacific. 121:461-464
V532 Oph has been found to be a member of the rare, hydrogen-deficient R Coronae Borealis (RCB) stars from new photometric and spectroscopic data reported in this paper. The lightcurve of V532 Oph shows the sudden, deep, irregularly spaced declines c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d60b61d40632f054a6094ce0513ea8f7
https://doi.org/10.1086/599383
https://doi.org/10.1086/599383