Results 1 to 10 of about 14,460 (279)
DISCOVERY OF A NEW PHOTOMETRIC SUB-CLASS OF FAINT AND FAST CLASSICAL NOVAE [PDF]
The Astrophysical Journal, 2011 We present photometric and spectroscopic follow-up of a sample of extragalactic novae discovered by the Palomar 60-inch telescope during a search for "Fast Transients In Nearest Galaxies" (P60-FasTING). Designed as a fast cadence (1-day) and deep (g < 21 mag) survey, P60-FasTING was particularly sensitive to short-lived and faint optical transients.
M. M. Kasliwal +5 more
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High-energy neutrinos from fast winds in novae [PDF]
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT We discuss a scenario in which TeV neutrinos are produced during explosions of novae. It is argued that hadrons are accelerated to very high energies in the inner part of a nova wind, as a result of reconnection of the strong magnetic field of a white dwarf. Hadrons are expected to interact efficiently with a dense matter of the
W. Bednarek, A. Śmiałkowski
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Defining Characteristics of Fast Novae [PDF]
International Astronomical Union Colloquium, 1979 Scrutiny of the light curves of the common novae yields important clues concerning both the nature of the nova outburst and the characteristics of the underlying white dwarfs. Ultraviolet and infrared observations have served to make available essentially complete bolometric light curves for several recent novae.
James W. Truran
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Analysis of Three Fast Oxygen‐Neon‐Magnesium Novae [PDF]
Publications of the Astronomical Society of the Pacific, 1998 Since astronomers have only known about the existence of oxygen-neon-magnesium (ONeMg) novae for the last decade, little work has been done on them as a group. The purpose of this work was to study three fast ONeMg novae: V838 Nova Herculis 1991 (Her 91), V693 Nova Coronae Australis 1981 (CrA 81), and Nova LMC 1990 No. 1 (LMC 90a).
K. M. Vanlandingham
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Abundance Analysis of the Extremely Fast ONeMg Novae V838 Herculis and V4160 Sagittarii [PDF]
The Astrophysical Journal, 2007 V838 Her and V4160 Sgr were two of the fastest classical novae ever observed, exhibiting light curve declines of 2 mag in less than 2 days. Both novae also showed strong neon emission lines, indicative of an outburst occurring on an oxygen-neon-magnesium white dwarf.
Greg J. Schwarz +3 more
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Quark-Novae in the outskirts of galaxies: an explanation of the fast radio burst phenomenon [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT We show that old isolated neutron stars in groups and clusters of galaxies experiencing a Quark-Nova phase (QN: an explosive transition to a quark star) may be the source of fast radio bursts (FRBs). Each of the millions of fragments of the ultrarelativistic QN ejecta provides a collisionless plasma for which the ambient medium (
Rachid Ouyed, D. A. Leahy, Nico Koning
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Light curves and absolute magnitudes of four recent fast LMC novae [PDF]
International Astronomical Union Colloquium, 2004 AbstractThe light curves of four recent fast LMC novae (Nova LMC 1988a, 1992, 1995, 2000) have been analysed to obtain the parameter t2 the time for a two magnitude decline below maximum light. Using the calibration of Della Valle & Livio (1995), values of MV at maximum are obtained.
J. B. Hearnshaw +3 more
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Early post-maximum spectral evolution of the fast novae V4742 Sagittarii and V4743 Sagittarii [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 The novae V4742 and V4743 Sagittarii (Sgr) erupted less than a week apart in 2002 September. This paper collects together early IAU Circular observations, plots light curves, and presents our own spectra of these novae. The spectra were collected with equipment commercially available to amateur astronomers. We identify the major spectral emission lines,
G. E. Morgan +2 more
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A Light Curve Analysis of Recurrent and Very Fast Novae in Our Galaxy, Magellanic Clouds, and M31 [PDF]
The Astrophysical Journal Supplement Series, 2018 AbstractWe analyzed optical, UV, and X-ray light curves of 14 recurrent and very fast novae in our Galaxy, Magellanic Clouds, and M31, and obtained their distances and white dwarf (WD) masses. Among the 14 novae, we found that eight novae host very massive (≳1.35M☉) WDs and are candidates for Type Ia supernova (SN Ia) progenitors. We confirmed that the
Izumi Hachisu, Mariko Kato
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A Comprehensive Light-curve Model of the Very Fast Nova V1674 Herculis
The Astrophysical JournalV1674 Her is one of the fastest novae, of which the very early phase is well observed, including optical rise to the peak over 10 mag. We present a full theoretical light-curve model of V1674 Her.
Mariko Kato +2 more
doaj +3 more sources