Results 1 to 10 of about 49,711 (195)

Re-assessment of type material of Plagiothecium novae-seelandiae Broth. and descriptions of four new Plagiothecium taxa (Bryophyta, Plagiotheciaceae) from Australasia [PDF]

open access: yesPhytoKeys
A re-examination of the original collection of Plagiothecium novae-seelandiae described by Brotherus in 1916 indicated that this material is not homogeneous.
Grzegorz J. Wolski   +3 more
doaj   +4 more sources

Search for sub-TeV Neutrino Emission from Novae with IceCube-DeepCore

open access: yesThe Astrophysical Journal, 2023
The understanding of novae, the thermonuclear eruptions on the surfaces of white dwarf stars in binaries, has recently undergone a major paradigm shift. Though the bolometric luminosity of novae was long thought to arise directly from photons supplied by
R. Abbasi   +387 more
doaj   +1 more source

Theoretical Light-curve Models of the Symbiotic Nova CN Cha—Optical Flat Peak for 3 Yr

open access: yesThe Astrophysical Journal, 2023
CN Cha is a slow symbiotic nova characterized by a 3 yr long optical flat peak followed by a rapid decline. We present theoretical light curves for CN Cha, based on hydrostatic approximation, and estimate the white-dwarf (WD) mass to be ∼0.6 M _☉ for a ...
Mariko Kato, Izumi Hachisu
doaj   +1 more source

A 9 Month Hubble Space Telescope Near-UV Survey of M87. I. Light and Color Curves of 94 Novae, and a Redetermination of the Nova Rate

open access: yesThe Astrophysical Journal Supplement Series, 2023
M87 has been monitored with a cadence of 5 days over a span of 9 months through the near-ultraviolet (NUV; F275W) and optical (F606W) filters of the Wide Field Camera 3 (WFC3) of the Hubble Space Telescope.
Michael M. Shara   +12 more
doaj   +1 more source

Two-Color VR CCD Photometry of Old Nova V603 Aquilae [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2005
Results of 6 nights of CCD VR photometry of the nova-like variable V603 Aquilae (Nova Aquilae 1918) obtained at the Mallorcian 35-cm telescope in July 2004 are reported.
Ivan L. Andronov   +3 more
doaj   +1 more source

Theory of Nova Outbursts and Type Ia Supernovae

open access: yesActa Polytechnica CTU Proceedings, 2015
We briefly review the current theoretical understanding of the light curves of novae. These curves exhibit a homologous nature, dubbed the universal decline law, and when time-normalized, they almost follow a single curve independently of the white dwarf
M. Kato, I. Hachisu
doaj   +1 more source

Discovery of a new photometric sub-class of faint and fast classical novae [PDF]

open access: yes, 2010
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
A. Rau   +47 more
core   +2 more sources

Constraining the role of novae as progenitors of Type Ia Supernovae [PDF]

open access: yes, 2015
(Abridged) White dwarfs (WDs) undergoing unstable nuclear burning on their surfaces, resulting in the nova phenomenon, have been considered as one of the prospective candidates for the still elusive progenitors of SNeIa.
Gilfanov, Marat, Soraisam, Monika
core   +2 more sources

Ultraviolet and X-ray Light-Curves of Novae Observed by the Neil Gehrels Swift Observatory

open access: yesUniverse, 2022
With rapid response capabilities, and a daily planning of its observing schedule, the Neil Gehrels Swift Observatory is ideal for monitoring transient and variable sources.
Kim L. Page   +2 more
doaj   +1 more source

Casa Nova, Etiqueta Nova [PDF]

open access: yesPonto Urbe, 2013
Este artigo analisa as praticas de promocao de etiqueta urbana, promovidas pelos tecnicos do Governo do Estado do Amazonas (GEA), como parte integrante do conjunto de acoes socioambientais do Programa Social e Ambiental dos Igarapes de Manaus (Prosamim).
Meneghini, Marcia Elisa Freire   +1 more
openaire   +2 more sources

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