Results 91 to 100 of about 1,204,542 (190)

Optical Detection of the X-Ray Flash in the Very Fast Nova V1674 Her: Optical Contribution of the Irradiated Accretion Disk

The Astrophysical Journal
V1674 Her is one of the fastest and brightest novae, characterized by dense optical photometry in the premaximum phase—a rise from g = 17 to 7 mag, over one-quarter of a day.
Izumi Hachisu, Mariko Kato
doaj   +1 more source

Prospects for detectability of classical novae with INTEGRAL

, 2001
Classical novae are potential gamma-ray emitters, both in lines and in a continuum. Continuum emission (at energies between 20-30 and 511 keV) and line emission at 511 keV are related to positron annihilation and its Comptonization in the expanding shell; 18F is the main responsible of positron production.
Hernanz, M., Gomez-Gomar, J., Jose, J., Coc, A.   +3 more
openaire   +3 more sources

Fermi-LAT gamma-ray detections of classical novae V1369 Centauri 2013 and V5668 Sagittarii 2015

, 2016
We report the Fermi Large Area Telescope (LAT) detections of high-energy (>100 MeV) γ-ray emission from two recent optically bright classical novae, V1369 Centauri 2013 and V5668 Sagittarii 2015.
Stawarz, Łukasz, Wood, K. S., Wood, D. L., Stawarz, Ł., Cheung, C. C., Desiante, R., LONGO, FRANCESCO, Jean, P., Starrfield, S., Pivato, G., Corbet, R. H. D., Shore, S. N., Knödlseder, J., Longo, F.   +13 more
core   +1 more source

Upper Bound of Ejecta Mass in a Nova Outburst

The Astrophysical Journal
We present the maximum ejecta mass ${({M}_{{\rm{ej}}})}_{{\rm{\max }}}$ and the maximum ratio of ejecta mass and accreted mass ${({M}_{{\rm{ej}}}/{M}_{{\rm{acc}}})}_{{\rm{\max }}}$ of a nova for various white dwarf (WD) masses ( M _WD  = 0.6–1.38 M _ ...
Izumi Hachisu, Mariko Kato
doaj   +1 more source

Irradiation-driven Formation of Supersoft X-Ray Sources following Classical Novae

The Astrophysical Journal
Supersoft X-ray sources (SSSs) are characterized by persistent thermonuclear burning on the surfaces of white dwarfs (WDs). The standard model requires high mass-transfer rates of ∼10 ^−7 M _⊙ yr ^−1 from massive companions, presenting a theoretical ...
Weitao Zhao, Xiangcun Meng, Yingzhen Cui, Yunlang Guo   +3 more
doaj   +1 more source

Getting to know classical novae with Swift

Journal of High Energy Astrophysics, 2015
11 pages.
openaire   +2 more sources

Extragalactic Classical Nova Surveys

, 2008
We are currently involved in a multifaceted campaign to study extragalactic classical novae in the Local Group and beyond. Here we report on-going results from the exploitation of the POINT-AGAPE M31 dataset; initial results from our Local Group imaging, and spectroscopic CNe follow-up campaign and introduce the Liverpool Extragalactic Nova Survey.
Darnley, M. J., Black, D. T. R., Bode, M. F., Newsam, A. M., Kerins, E., O'Brien, T. J., Misselt, K., Shafter, A. W.   +7 more
openaire   +2 more sources

UV turn–off times of classical novae

, 1998
We present IUE spectra of classical novae obtained at least one year after the outburst. The UV luminosities are compared with the ROSAT  observations and significant parameters of the systems.
R. González–Riestra, J. Gallagher, M. Orio   +2 more
core   +1 more source

A Unified Model for Shock Interaction and γ-Ray Emission in Classical Novae

The Astrophysical Journal
We present a parameterized (“toy”) model for shock interaction and γ -ray emission in classical novae, in which a white dwarf envelope of mass M _env is removed over a timescale τ (proportional to the nova speed class, t _2 ) in an outflow that ...
Rebecca Diesing, Brian D. Metzger
doaj   +1 more source

Phylogeny, Global Biogeography and Pleomorphism of Zanclospora. [PDF]

Microorganisms, 2021
Réblová M, Kolařík M, Nekvindová J, Miller AN, Hernández-Restrepo M.   +4 more
europepmc   +1 more source