Results 41 to 50 of about 127,440 (200)

Formation of Massive and Wide First-star Binaries in Radiation Hydrodynamic Simulations

The Astrophysical Journal, 2023
Abstract We study the formation of Population III stars by performing radiation hydrodynamic simulations for three different initial clouds extracted from cosmological hydrodynamic simulations. Starting from the cloud collapse stage, we follow the growth of protostars by accretion for ∼105 yr until the radiative feedback from the ...
Kazuyuki Sugimura, Tomoaki Matsumoto, Takashi Hosokawa, Shingo Hirano, Kazuyuki Omukai   +4 more
openaire   +3 more sources

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

Molecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

When an old star smolders: On the detection of hydrocarbon emission from S-type AGB stars

, 2010
Polycyclic aromatic hydrocarbons (PAHs) produce characteristic infrared emission bands that have been observed in a wide range of astrophysical environments, where carbonaceous material is subjected to ultraviolet (UV) radiation.
A. A. Zijlstra, B. Acke, Boersma, Cami, Cau, Cherchneff, Cherchneff, Chiar, Cohen, Ferrarotti, Furlan, G. C. Sloan, Gielen, Goto, Goto, Goto, Gustafsson, H. Van Winckel, Higdon, Hony, J. A. D. L. Blommaert, Jura, Jäger, Jäger, K. Smolders, Keller, Kraemer, L. Decin, Leger, Lepp, Li, Mattioda, Mattioda, P. Neyskens, Peeters, Pino, Puget, Richer, S. Hony, S. Van Eck, Schlegel, Sloan, Sloan, Sylvester, T. Verhoelst, Tielens, van Diedenhoven, Verhoelst, Yang   +48 more
core   +1 more source

The unbiased frequency of planetary signatures around single and binary white dwarfs using ${\it Spitzer}$ and ${\it Hubble}$ [PDF]

, 2019
This paper presents combined ${\it Spitzer}$ IRAC and ${\it Hubble}$ COS results for a double-blind survey of 195 single and 22 wide binary white dwarfs for infrared excesses and atmospheric metals.
Farihi, Jay, Gänsicke, Boris T., Swan, Andrew, Wilson, Thomas G.   +3 more
core   +2 more sources

Probing the Propeller Regime With Wide Neutron Star Binaries

Astronomische Nachrichten
ABSTRACTWe model the duration of the propeller stage in wide binary systems with neutron stars and calculate the time of accretion onset for various propeller models. We apply our modeling to the symbiotic X‐ray binary SWIFT J0850.8‐4219. Unless a propeller with a very slow spin‐down is operating, it is very improbable to find a system similar to SWIFT
M. D. Afonina, S. B. Popov
openaire   +2 more sources

Identification of serum protein biomarkers for pre‐cancerous lesions associated with pancreatic ductal adenocarcinoma

Molecular Oncology, EarlyView.
This work identified serum proteins associated with pancreatic epithelial neoplasms (PanINs) and early‐stage PDAC. Proteomics screens assessed genetically engineered mice with abundant PanINs, KPC mice (Lox‐STOP‐Lox‐KrasG12D/+ Lox‐STOP‐Lox‐Trp53R172H/+ Pdx1‐Cre) before PDAC development and also early‐stage PDAC patients (n = 31), compared to benign ...
Hannah Mearns, Jaclyn S. Long, Sergio Lilla, Kelly Hodge, Marcus J. G. W. Ladds, Colin Nixon, Paula Fernández‐Palanca, Sara Zanivan, Pilar Acedo, Stephen P. Pereira, Kevin M. Ryan   +10 more
wiley   +1 more source

The binary fraction of stars in dwarf galaxies: the case of Leo II [PDF]

, 2017
We combine precision radial velocity data from four different published works of the stars in the Leo II dwarf spheroidal galaxy. This yields a dataset that spans 19 years, has 14 different epochs of observation, and contains 372 unique red giant branch ...
Kirby, Evan, Koch, Andreas, Mateo, Mario, McConnachie, Alan, Olszewski, Edward, Spencer, Meghin, Walker, Matthew   +6 more
core   +2 more sources

Binary frequency of planet-host stars at wide separations [PDF]

Astronomy & Astrophysics, 2014
The aim of the project is to improve our knowledge on the multiplicity of planet-host stars at wide physical separations. We cross-matched approximately 6200 square degree area of the Southern sky imaged by the Visible Infrared Survey Telescope for Astronomy (VISTA) Hemisphere Survey (VHS) with the Two Micron All Sky Survey (2MASS) to look for wide ...
Lodieu, N., Perez-Garrido, A., Bejar, V. J. S., Gauza, B., Ruiz, M. T., Rebolo, R., Pinfield, D. J., Martin, E. L.   +7 more
openaire   +2 more sources

COMP–PMEPA1 axis promotes epithelial‐to‐mesenchymal transition in breast cancer cells

Molecular Oncology, EarlyView.
This study reveals that cartilage oligomeric matrix protein (COMP) promotes epithelial‐to‐mesenchymal transition (EMT) in breast cancer. We identify PMEPA1 (protein TMEPAI) as a novel COMP‐binding partner that mediates EMT via binding to the TSP domains of COMP, establishing the COMP–PMEPA1 axis as a key EMT driver in breast cancer.
Konstantinos S. Papadakos, Gilar Gorji‐bahri, Lejla Gradjan, Julia Zajac, Kacper Gil, Yvonne Thokozile Nduku, Anna M. Blom   +6 more
wiley   +1 more source

The Formation and Fragmentation of Disks around Primordial Protostars

, 2011
The very first stars to form in the Universe heralded an end to the cosmic dark ages and introduced new physical processes that shaped early cosmic evolution. Until now, it was thought that these stars lived short, solitary lives, with only one extremely
P. C. Clark, R. J. Smith, R. S. Klessen, S. C. O. Glover, T. H. Greif, V. Bromm, Yoshida   +6 more
core   +1 more source