Results 1 to 10 of about 237,013 (298)

On Variation Mechanisms in Recurrent Nova IM Normae

open access: yesGalaxies, 2022
Light curves by Woudt and Warner (WW) of recurrent nova IM Nor show eclipse-like dips that they saw as too wide for eclipses alone, and interpreted as mainly a reflection effect due to irradiation of the companion (mass donor) star with some amplitude ...
R. E. Wilson
doaj   +1 more source

EITHER/ OR, AND BEYOND [PDF]

open access: yesIncursiuni în imaginar, 2023
Reality and fiction build a binary which shared the fate of dualist thinking in general in the postmodernist age, dominated by deconstruction. The climactic point was probably reached by the fabrication of lens which magnify reality.
Maria-Ana Tupan
doaj   +1 more source

Parameterization of long-period eclipsing binaries

open access: yesOpen Astronomy, 2022
One of the important sources for independent determination of stellar masses is eclipsing binaries with components on the main sequence, and with observable spectral lines of both components.
Pakhomova Polina   +4 more
doaj   +1 more source

Beyond binaries and before becoming: Reconsidering resistance in UK higher education

open access: yesPRISM, 2023
Drawing from the tensions within non-representational and human practice perspectives on affect, this paper continues the task of re-conceptualising academic-level resistance in the context of UK higher education. Such re-conceptualisation is underpinned
Mollie Baker
doaj   +1 more source

Deconstructing the Characteristics of the Ionized Gas Component in Planetary Nebulae From Their Internal Motions

open access: yesFrontiers in Astronomy and Space Sciences, 2022
The internal motions of the ionized gas in the shells of planetary nebulae (PNe) have served as relevant diagnostic tools to understand the development of this important stage of stellar evolution.
J. A. López
doaj   +1 more source

New Symbiotic Stars Monitored with the Hermes Spectrograph: A Case Study of Orbital Hα Modulation

open access: yesOpen Astronomy, 2012
We present new orbital elements for two symbiotic systems involving a giant of spectral type S, namely V420 Hya and ER Del. These orbital elements are compared with existing elements for S-type binaries and for symbiotic binaries with M-giant primaries ...
Jorissen Alain   +4 more
doaj   +1 more source

Multiwavelength SED as a Tool in Understanding Outbursts of Symbiotic Binaries

open access: yesOpen Astronomy, 2012
Symbiotic binaries consist of a few sources of radiation contributing to spectral energy distribution (SED) from hard X-rays to radio wavelengths.
Skopal A.
doaj   +1 more source

The Census of Exoplanets in Visual Binaries: Population Trends from a Volume-Limited Gaia DR2 and Literature Search

open access: yesFrontiers in Astronomy and Space Sciences, 2021
We present results from an extensive search in the literature and Gaia DR2 for visual co-moving binary companions to stars hosting exoplanets and brown dwarfs within 200 pc.
Clémence Fontanive   +1 more
doaj   +1 more source

Reconstructing Historical Light Curves of Symbiotic Stars and Novae

open access: yesOpen Astronomy, 2012
We reconstructed photometric histories of symbiotic stars and novae from direct inspection and measurement of photographic plates preserved at historical archives.
Jurdana-Šepić R., Munari U.
doaj   +1 more source

Constraining Roche-Lobe Overflow Models Using the Hot-Subdwarf Wide Binary Population

open access: yesOpen Astronomy, 2017
One of the important issues regarding the final evolution of stars is the impact of binarity. A rich zoo of peculiar, evolved objects are born from the interaction between the loosely bound envelope of a giant, and the gravitational pull of a companion ...
Vos Joris, Vučković Maja
doaj   +1 more source

Home - About - Disclaimer - Privacy