Results 61 to 70 of about 5,914 (256)
Evidence for Suppression of Metal Pollution in White Dwarfs by Close Substellar Companions
The Astrophysical Journal LettersApproximately 25%–50% of white dwarfs (WDs) exhibit metal absorption lines in their photospheres, interpreted as evidence of ongoing/recent accretion of planetary debris from remnant systems.
Zhangliang Chen +6 more
doaj +1 more source
Living Reviews in Relativity, 2023 The idea of stable, localized bundles of energy has strong appeal as a model for particles. In the 1950s, John Wheeler envisioned such bundles as smooth configurations of electromagnetic energy that he called geons, but none were found. Instead, particle-
Steven L. Liebling, Carlos Palenzuela
doaj +1 more source
Molecular Oncology, EarlyView.Interferon type 1 (IFN‐1) production and signaling is associated with the acquisition of therapy resistance, following chronic DNA damage, via Interferon‐related DNA damage resistance signature (IRDS) gene expression. An alternative, DNA damage‐independent role of sustained IFN‐1 mediated resistance was identified and characterized by the emergence of ...
Ashlyn Conant +11 more
wiley +1 more source
CEACAM1 participation in breast cancer progression
Molecular Oncology, EarlyView.In invasive breast cancer (BC), CEACAM1 shifts from an apical to a uniform membranous/cytoplasmic pattern, or is lost, as tumors dedifferentiate, inversely tracking the Ki‐67 proliferative index. In MCF‐7 cells, only CEACAM1‐4L suppresses proliferation, repressing cell cycle and growth factor genes.
Mykola Lyndin +3 more
wiley +1 more source
Visual Orbits and Alignments of Planet-hosting Binary Systems
The Astronomical Journal, 2023 Roughly half of Solar-type planet hosts have stellar companions, so understanding how these binary companions affect the formation and evolution of planets is an important component to understanding planetary systems overall.
Kathryn V. Lester +9 more
doaj +1 more source
The wide binary frequency of metal-poor stars
Astronomy & AstrophysicsContext. This study is aimed at identifying possible low-mass and sub-stellar companions to stars with well-determined metallicities. We investigate the multiplicity of metal-poor stars along with its impact on formation processes in the conditions of the early universe. Aims.
N. Lodieu +7 more
openaire +2 more sources
, 2011 11 pages, 2 figures; to be published in MNRAS; RV measurements and orbits will be distributed in the on-line SB9 catalogue. Revision 1: the on-line only material was added to the printed version; 1 ascii data file and 67 figures in eps ...
Halbwachs, Jean-Louis +2 more
openaire +2 more sources
Searching for Wide Binary Brown Dwarfs around Nearby Stars [PDF]
Symposium - International Astronomical Union, 2003 We have started a program to search for Brown Dwarf (BD) companions to nearby stars (5 ≤ d ≤ 10 pc) on long period orbits (up to 2000 AU) using wide field optical/infrared imaging. Our goals in surveying a volume-limited sample of stars are: 1) to determine the binary fraction of widely separated BDs and help constrain the BD formation processes, 2) to
Loïc Albert, René Doyon, Daniel Nadeau
openaire +1 more source
Molecular Oncology, EarlyView.The cell‐autonomous roles of interferon type 1 vary based on duration and intensity. While acute, robust signaling results in cancer cell cytotoxic effects, sustained, low‐level signaling is associated with tumor‐promoting effects. This review summarizes current research of IFN‐1 in cancer and within the clinical setting, with an emphasis on female ...
Ashlyn Conant +7 more
wiley +1 more source
Wide Binary Stars in the Galactic Field - A Statistical Approach
, 2010 This thesis focuses on the statistical properties of wide binary (WB) star systems in the Galactic field. For the present study we select a homogeneous sample covering about 675 square degrees in the direction of the NGP. It contains nearly 670,000 MS stars with apparent magnitudes between 15 and 20.5 mag and spectral classes later than G5.
openaire +3 more sources