Results 151 to 160 of about 141,416 (254)

Search for ²²Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes. [PDF]

Nat Commun, 2023
Fougères C, de Oliveira Santos F, José J, Michelagnoli C, Clément E, Kim YH, Lemasson A, Guimarães V, Barrientos D, Bemmerer D, Benzoni G, Boston AJ, Böttger R, Boulay F, Bracco A, Čeliković I, Cederwall B, Ciemala M, Delafosse C, Domingo-Pardo C, Dudouet J, Eberth J, Fülöp Z, González V, Gottardo A, Goupil J, Hess H, Jungclaus A, Kaşkaş A, Korichi A, Lenzi SM, Leoni S, Li H, Ljungvall J, Lopez-Martens A, Menegazzo R, Mengoni D, Million B, Mrázek J, Napoli DR, Navin A, Nyberg J, Podolyák Z, Pullia A, Quintana B, Ralet D, Redon N, Reiter P, Rezynkina K, Saillant F, Salsac MD, Sánchez-Benítez AM, Sanchis E, Şenyiğit M, Siciliano M, Smirnova NA, Sohler D, Stanoiu M, Theisen C, Valiente-Dobón JJ, Ujić P, Zielińska M.   +61 more
europepmc   +1 more source

Novae Ejecta as Colliding Shells

, 2010
Following on our initial absorption-line analysis of fifteen novae spectra we present additional evidence for the existence of two distinct components of novae ejecta having different origins.
A. Cassatella, A. Evans, A. Fruchter, A.Y. Sytov, A.Y. Sytov, A.Y. Sytov, B. Warner, C.I. Short, C.S. Beals, D. Mihalas, D.B. McLaughlin, D.B. McLaughlin, E.B. Jenkins, Elena Mason, F. Senziani, G. Steigman, G.J. Schwarz, H.N. Russell, J. Castor, J. Gomez-Gomar, J.-U. Ness, J.S. Gallagher, M. Contini, M. Kato, M. Kato, M. Livio, M. Orio, M.K.V. Bappu, O. Yaron, P.H. Hauschildt, R. Weaver, R.D. Gehrz, R.D. Gehrz, R.E. Williams, R.E. Williams, Robert Williams, S. Rosseland, S.A. Glasner, S.G. Starrfield, S.N. Shore, W.D. Arnett   +40 more
core   +1 more source

Observations of Southern Dwarf Novae [PDF]

International Astronomical Union Colloquium, 1979
Preliminary results of spectroscopic and photometric data for five dwarf novae are presented : 1) V 436 Cen. The orbital period of 0.0669 days was determined from radial velocity variations. The RV half amplitude of the primary, K1. = 159 km/s, implies very small masses of M1 ≲ 0.20 M⊙ and M2 = 0.18 M⊙ for the binary components.2) Z Cha. Broad emission
openaire   +1 more source

The Nova Synthetic Data Base: A Principal Component/AI Analysis of Novae Synoptic Spectra

The Astrophysical Journal Supplement Series
The Nova Synthetic Data Base (NSDB) is presented as the first publicly available database of synthetic spectra for classical nova shells, spanning an unprecedented range of physical parameters (e.g., ejecta mass, chemical composition, temperature, and ...
Bruno C. Santos, Marcos P. Diaz, Larissa Takeda   +2 more
doaj   +1 more source

A Photoionization Model for the Infrared Coronal Line Emission in the Classical Nova V1716 Scorpii

The Astrophysical Journal
A near-infrared spectrum of nova V1716 Scorpii (PNV J17224490-4137160), a recent bright ( ${V}_{\max }=7.3$ mag), Fermi-LAT detected γ -ray source, was modeled using the photoionization code CLOUDY.
C. E. Woodward, G. Shaw, S. Starrfield, A. Evans, K. L. Page   +4 more
doaj   +1 more source

High Energy Emission of Symbiotic Recurrent Novae: RS Oph and V407 Cyg

Open Astronomy, 2012
Recurrent novae occurring in symbiotic binaries are candidate sources of high energy photons, reaching GeV energies. Such emission is a consequence of particle acceleration leading to pion production.
Hernanz M., Tatischeff V.
doaj   +1 more source

Recent progress in understanding the eruptions of classical novae [PDF]

Dramatic progress has occurred in the last two decades in understanding the physical processes and events leading up to, and transpiring during the eruption of a classical nova.
Shara, Michael M.
core   +1 more source

Superhumps and Repetitive Rebrightenings of the WZ Sge-Type Dwarf Nova, EG Cancri

, 2003
We report on time-resolved photometric observations of the WZ Sge-type dwarf nova, EG Cnc (Huruhata's variable, see also http://www.kusastro.kyoto-u.ac.jp/vsnet/DNe/egcnc.html), during its superoutburst in 1996-1997.
Baba, Hajime, Kato, Taichi, Matsumoto, Katsura, Nogami, Daisaku, 加藤, 太一, 松本, 桂, 野上, 大作, 馬場, 肇   +7 more
core   +1 more source

Thermal stability and nova cycles in permanent superhump systems

, 2000
Archival data on permanent superhump systems are compiled to test the thermal stability of their accretion discs. We find that their discs are almost certainly thermally stable as expected.
Naylor, T., Retter, A.
core   +2 more sources

The Vertical Structure of Accretion Disks for Dwarf Novae [PDF]

Journal of Astronomy and Space Sciences, 1985
We have constructed models of steady state accretion disk with accretion rate M=10^16 g/sec or 10^18 g/sec. The mass and the radius of white dwarf were taken as 1 Msolar and 10^9 cm, respectively. The possible application of the results to Z Cha and ZCam
Kyu Hong Choi, Kyung Mee Kim
doaj