Results 21 to 30 of about 4,124,580 (330)
Novae as a Class of Transient X‐Ray Sources [PDF]
The Astrophysical Journal, 2008 Motivated by the recently discovered class of faint (10^34-10^35 ergs/s) X-ray transients in the Galactic Center region, we investigate the 2-10 keV properties of classical and recurrent novae. Existing data are consistent with the idea that all classical novae are transient X-ray sources with durations of months to years and peak luminosities in the ...
Koji Mukai +6 more
openaire +3 more sources
Neutrino Echoes from Multimessenger Transient Sources [PDF]
Physical Review Letters, 2019 The detection of the high-energy neutrino event, IceCube-170922A, demonstrated that multimessenger particle astrophysics triggered by neutrino alerts is feasible. We consider time delay signatures caused by secret neutrino interactions with the cosmic neutrino background and dark matter and suggest that these can be used as a novel probe of neutrino ...
Kohta Murase, Ian M. Shoemaker
openaire +3 more sources
VARIABLE AND TRANSIENT RADIO SOURCES IN THE FIRST SURVEY [PDF]
The Astrophysical Journal, 2011 A comprehensive search for variable and transient radio sources has been conducted using ~55,000 snapshot images of the FIRST survey. We present an analysis leading to the discovery of 1,627 variable and transient objects down to mJy levels over a wide range of timescales (few minutes to years).
Thyagarajan, Nithyanandan +3 more
openaire +2 more sources
A transient placental source of serotonin for the fetal forebrain [PDF]
Nature, 2011 Serotonin (5-hydroxytryptamine or 5-HT) is thought to regulate neurodevelopmental processes through maternal-fetal interactions that have long-term mental health implications. It is thought that beyond fetal 5-HT neurons there are significant maternal contributions to fetal 5-HT during pregnancy but this has not been tested empirically.
Bonnin, Alexandre +8 more
openaire +2 more sources
Gamma-Ray Polarimetry of Transient Sources with POLAR
, 2022 Polarization measurements of the gamma-ray component of transient sources are of great scientific interest, they are however, also highly challenging. This is due to the typical low signal to noise and the potential for significant systematic errors. Both issues are made worse by the transient nature of the events which prompt one to observe a large ...
Kole, Merlin, Sun, Jianchao
openaire +2 more sources
AN ARECIBO SEARCH FOR PULSARS AND TRANSIENT SOURCES IN M33 [PDF]
The Astrophysical Journal, 2011 We report on a systematic and sensitive search for pulsars and transient sources in the nearby spiral galaxy M33, conducted at 1.4 GHz with the Arecibo telescope's seven-beam receiver system, ALFA. Data were searched for both periodic and aperiodic sources, up to 1000 pc cm^{-3} in dispersion measure and on timescales from $\sim$50 \us to several ...
Bhat, Ramesh +6 more
openaire +4 more sources
Models of ultraluminous X-ray transient sources [PDF]
Astronomy & Astrophysics, 2020 Context. It is now widely accepted that most ultraluminous X-ray sources (ULXs) are binary systems whose large (above 1039 erg s−1) apparent luminosities are explained by super-Eddington accretion onto a stellar-mass compact object. Many of the ULXs, especially those containing magnetized neutron stars, are highly variable; some exhibit transient ...
J.-M. Hameury, J.-P. Lasota
openaire +2 more sources
Identifying transient and variable sources in radio images [PDF]
Astronomy and Computing, 2019 With the arrival of a number of wide-field snapshot image-plane radio transient surveys, there will be a huge influx of images in the coming years making it impossible to manually analyse the datasets. Automated pipelines to process the information stored in the images are being developed, such as the LOFAR Transients Pipeline, outputting light curves ...
Antonia Rowlinson +18 more
openaire +3 more sources
A Search for Persistent Radio Sources toward Repeating Fast Radio Bursts Discovered by CHIME/FRB
The Astrophysical JournalThe identification of persistent radio sources (PRSs) coincident with two repeating fast radio bursts (FRBs) supports FRB theories requiring a compact central engine.
Adaeze L. Ibik +27 more
doaj +1 more source
FEBS Letters, EarlyView.Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi +5 more
wiley +1 more source