Results 61 to 70 of about 85,351 (144)

Hydrodynamic Predictions for the Next Outburst of T Coronae Borealis: It Will Be the Brightest Classical or Recurrent Nova Ever Observed in X-Rays

open access: yesThe Astrophysical Journal
T Coronae Borealis (TCrB) is a recurrent nova with recorded outbursts in 1866 and 1946 and possible outbursts in 1217 and 1787. It is predicted to explode again in 2025 or 2026 based on multiple observational studies. The system consists of a massive ( M
S. Starrfield   +13 more
doaj   +1 more source

Filming the evolution of symbiotic novae with VLBI

open access: yes, 2023
In symbiotic novae, the material ejected from the surface of the white dwarf (WD) after the thermonuclear runaway drives a strong shock through the dense circumstellar gas produced by the red giant (RG) wind. Recurring symbiotic novae such as V407 Cyg and RS Oph are perfect real-time laboratories for studying physical processes as diverse as accretion,
openaire   +2 more sources

Multiwavelength Variability in the Symbiotic Nova V1016 CYG [PDF]

open access: yesInternational Astronomical Union Colloquium, 2004
Analysis of the optical and infrared photometry together with UV spectroscopy led to discovery of the 15-years periodicity in the symbiotic system V1016 Cyg. This period could be interpreted as a orbital period in the binary system consisting of the Mira variable and the hot white dwarf.We have analyzed long-term optical photographic and UBV ...
Š. Parimucha, M. Vańko
openaire   +1 more source

Evolution of the symbiotic nova RX Puppis [PDF]

open access: yes, 2019
We present and discuss a hundred year history of activity of the hot component of RX Pup based on optical photometry and spectroscopy. The outburst evolution of RX Pup resembles that of other symbiotic novae whereas at quiescence the hot component shows ...
García, Lía Guillermina   +5 more
core  

A WISE view of novae - I. The data [PDF]

open access: yes, 2014
We present the results of data-mining the Wide-field Infrared Survey Explorer (WISE) archive for data on classical and recurrent novae. We find that the detections are consistent with dust emission, line emission, emission by a stellar photosphere, or a ...

core   +1 more source

Creating a Masterpiece. The Road to (and Beyond) Woodward and Hoffmann's 1969 Angewandte Chemie Treatise

open access: yesThe Chemical Record, Volume 26, Issue 8, August 2026.
This publication describes how R. B. Woodward and Roald Hoffmann crafted their masterpiece publications. Illustrations include Woodward's first draft of the famous “Violations There are none. Nor can violations be expected of so fundamental a principle of maximum bonding.” Original but discarded text shows the stepwise paths toward the W‐H masterpieces.
Jeffrey I. Seeman
wiley   +1 more source

Symbiotic Nova PU Vul - 33 Years of Observations

open access: yesOpen Astronomy, 2012
We present UBVRI light curves of the symbiotic nova PU Vul after its outburst in 1978. Three observed eclipses of the hot component by the cool one were used to determine the ephemeris of the binary system as JD (Min I) = 2444550(15) + 4897(10) × E days.
Shugarov S., Chochol D., Kolotilov E.
doaj   +1 more source

Recurrent Novae, Classical Novae, Symbiotic Novae, and Population II Novae

open access: yes, 2001
Light curve analysis of decay phase of nova outburst are summarized. Nova duration is determined by the strong wind mass-loss which depends only on the white dwarf mass. Fast novae correspond very massive white dwarfs and very slow novae correspond almost lower mass limit of white dwarfs.
openaire   +2 more sources

Transient Ecological Niches for Diazotrophs in Upwelling Bays

open access: yesJournal of Geophysical Research: Oceans, Volume 131, Issue 8, August 2026.
Abstract Diazotrophs, microorganisms capable of fertilizing the ocean through biological nitrogen fixation (BNF), are widespread in the oceans, including upwelling bays. However, their ability to respond to short‐lived upwelling pulses, lasting only a few days, remains poorly understood. To investigate diazotrophy across temporal scales, we analyzed 18 
D. Fernández‐Román   +13 more
wiley   +1 more source

NON-THERMAL EMISSION FROM CATACLYSMIC VARIABLES: IMPLICATIONS ON ASTROPARTICLE PHYSICS

open access: yesActa Polytechnica, 2013
We review the lines of evidence that some cataclysmic variables (CVs) are the sources of non-thermal radiation. It was really observed in some dwarf novae in outburst, a novalike CV in the high state, an intermediate polar, polars, and classical novae ...
Vojtech Šimon
doaj   +1 more source

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