Results 71 to 80 of about 13,402 (159)

The X-ray emission of the long-period transient and accreting cataclysmic variable ASKAP J174508.9-505149

Astronomy & Astrophysics
Long-period transients (LPTs) challenge our knowledge of the mechanism producing radio periodic pulsations in compact objects. Some LPTs have been associated with systems hosting a white dwarf and a low-mass star in a detached binary. Recently, a new LPT
Imbrogno M., Veresvarska M., Wang Y. L., Rea N., Coti Zelati F., Rose K., Pritchard J., de Martino D., Scaringi S., Wang Z., Kaplan D. L.   +10 more
doaj   +1 more source

Can dwarf novae produce type Ia supernovae?

Astronomy & Astrophysics
Context. Accreting white dwarfs (WDs) are considered some of the most promising progenitor candidates of type Ia supernovae (SNe Ia). Dwarf novae (DNe), a subclass of cataclysmic variables, consist of a CO WD accretor and a low-mass donor star, which can
Li R., Wu C., Dai Z., Wang B.
doaj   +1 more source

Early spectroscopic observations of four extragalactic novae

, 2015
We report the spectroscopic observations of four extragalactic novae in M31 and in M33, secured at Loiano Observatory, Italy. Nova M31 2009-10b is a luminous nova that needed some days to achieve the peak brightness.
POGGIANI, ROSA, R. Poggiani
core   +1 more source

Balmer decrements as a new diagnostic for period-bounce cataclysmic variable stars

Astronomy & Astrophysics
Context. Cataclysmic variable stars (CVs) evolve towards shorter orbital periods (Porb) until they reach a minimum Porb of ∼80 min. Beyond this point, the donor star becomes out of thermal equilibrium or increasingly degenerate, causing the system to ...
Hernández-Díaz Santiago, Stelzer Beate, Muñoz-Giraldo Daniela   +2 more
doaj   +1 more source

Novae observationes de entozois

NOVAE OBSERVATIONES DE ENTOZOIS Johannes Müller Library (-) Novae observationes de entozois (-
Creplin, Friedrich Heinrich Christian
core  

Symphyotrichum novae-angliae

, 2015
Symphyotrichum novae-angliae (L.) G L Nesom.
Hagerty, Ryan, USFWS
core  

Neon Novae, Recurrent Novae, and Type I Supernovae [PDF]

, 1989
Over the past few years, we have been investigating the effects of accretion onto massive white dwarfs and its implications for their growth in mass toward the Chandrasekhar limit, in attempts to identify a possible relationship between SN I and novae ...
Technion-Israel Institute of Technology, Haifa (Israel), Starrfield, Sumner, Sparks, Warren M., Shaviv, Giora, Illinois University, Urbana, Truran, James W.   +5 more
core  

Investigation of outburst characteristics in dwarf novae binary star systems

, 2009
Dwarf novae are a type of binary star system that consists of a cool red dwarf, as well as a white dwarf with an accretion disk. Occasionally the disk will get significantly brighter for a few days in an event called an outburst.
Klep, James Stuart.
core  

On a century of extragalactic novae and the rise of the rapid recurrent novae [PDF]

Novae are the observable outcome of a transient thermonuclear runaway on the surface of an accreting white dwarf in a close binary system. Their high peak luminosity renders them visible in galaxies out beyond the distance of the Virgo Cluster.
Henze, M, Darnley, MJ
core   +1 more source

De spermatozois observationes nonnullae novae

DE SPERMATOZOIS OBSERVATIONES NONNULLAE NOVAE Johannes Müller Library (-) De spermatozois observationes nonnullae novae (-
Bethe, Eduard
core