Results 1 to 10 of about 15,343 (167)
Astronomy and Astrophysics Review, 2009 accepted for Astron. Astrophys.
Yael Naze
exaly +6 more sources
HAZMAT. IX. An Analysis of the UV and X-Ray Evolution of Low-mass Stars in the Era of Gaia
The Astrophysical Journal, 2023 Low-mass stars (≤1 M _⊙ ) are some of the best candidates for hosting planets with detectable life because of these stars’ long lifetimes and relative ratios of planet to star mass and radius.
Tyler Richey-Yowell +8 more
doaj +1 more source
The Astrophysical Journal, 2023 Open clusters are thought to be the birthplace of most stars in the galaxy. Thus, they are excellent laboratories for investigating stellar evolution, and X-ray properties of various types of stars (including binary stars, evolved stars, and compact ...
Steven Chen +6 more
doaj +1 more source
The Astronomical Journal, 2023 The high-energy X-ray and ultraviolet (UV) radiation fields of exoplanet host stars play a crucial role in controlling the atmospheric conditions and the potential habitability of exoplanets.
Alexander Brown +10 more
doaj +1 more source
The Astrophysical Journal, 2022 We present Chandra X-ray observations of six previously identified Peter Pan objects, rare ∼40 Myr systems with evidence of primordial disk retention. We observe X-ray luminosities (0.8–3.0 keV) ranging from log L _x ∼ 27.7–29.1.
Emily Laos +8 more
doaj +1 more source
Searching for Gamma-Ray Binaries in Multiwavelength Catalogs
Universe, 2021 The number of gamma-ray binaries currently known is still so small that even a new finding represents a significant expansion of its population. We present a possible hunting strategy based on screening different catalogs to filter potential peculiar ...
Josep Martí, Pedro L. Luque-Escamilla
doaj +1 more source
Hydrogen-triggered X-Ray Bursts from SAX J1808.4−3658? The Onset of Nuclear Burning
The Astrophysical Journal, 2023 We present a study of weak, thermonuclear X-ray bursts from the accreting millisecond X-ray pulsar SAX J1808.4−3658. We focus on a burst observed with the Neutron Star Interior Composition Explorer on 2019 August 9, and describe a similar burst observed ...
Sierra Casten +2 more
doaj +1 more source
NEW X-RAY DETECTIONS OF WNL STARS [PDF]
The Astronomical Journal, 2012 Previous studies have demonstrated that putatively single nitrogen-type Wolf-Rayet stars (WN stars) without known companions are X-ray sources. However, almost all WN star X-ray detections so far have been of earlier WN2 - WN6 spectral subtypes. Later WN7 - WN9 subtypes (also known as WNL stars) have proved more difficult to detect, an important ...
Skinner, Stephen Lee +4 more
openaire +3 more sources
X-Raying the Star Formation History of the Universe [PDF]
The Astrophysical Journal, 2000 The current models of early star and galaxy formation are based upon the hierarchical growth of dark matter halos, within which the baryons condense into stars after cooling down from a hot diffuse phase. The latter is replenished by infall of outer gas into the halo potential wells; this includes a fraction previously expelled and preheated, due to ...
Cavaliere, A., Giacconi, R., Menci, N.
openaire +3 more sources
The Astrophysical Journal, 2023 The launch of the Imaging X-ray Polarimetry Explorer (IXPE) on 2021 December 9 has opened a new window in X-ray astronomy. We report here the results of the first IXPE observation of a weakly magnetized neutron star, GS 1826−238, performed on 2022 March ...
Fiamma Capitanio +96 more
doaj +1 more source