We discuss properties of type III bursts that change the sign of their drift rate from negative to positive and vice versa. Moreover, these bursts may change the sign of their drift rates more than once. These particular type III bursts were observed simultaneously by the radio telescopes UTR-2, URAN-2, [...]... Read more »
V. Melnik et al. (2015) Decameter type III bursts with changing frequency drift-rate signs . Solar Physics. info:/
Forgetting Earth Dementia. Few words inspire greater fear in those of us who value (quasi-?) independent thought. The term ‘dementia’ encompasses various brain disorders that all share some scary traits: general decline in cognitive function, decreased ability to speak, and in later stages, being unable to take care of oneself. Unfortunately, as human lifespan increases […]... Read more »
Killin LO, Starr JM, Shiue IJ, & Russ TC. (2016) Environmental risk factors for dementia: a systematic review. BMC geriatrics, 16(1), 175. PMID: 27729011
Parihar VK, Allen BD, Caressi C, Kwok S, Chu E, Tran KK, Chmielewski NN, Giedzinski E, Acharya MM, Britten RA.... (2016) Cosmic radiation exposure and persistent cognitive dysfunction. Scientific reports, 34774. PMID: 27721383
Coronal Mass Ejections (CMEs) are hot, massive blobs of plasma and magnetic fields that erupt from the Sun, and are sometimes Earth-directed. Depending on their speed and mass these transients can strongly effect the space weather, causing geomagnetic storms and damage to space bound technologies. It is therefore imperative to [...]... Read more »
Sachdeva, N., Subramanian, P., Colaninno, R., et al.,. (2015) Propagation of Coronal Mass Ejections: Aerodynamic Drag. Astrophysical Journal, 158. info:/
Beyond the well-known Solar System, there is an immensity of other unique systems... Read more »
Johanna K. Teske, Stephen A. Shectman, Steve S. Vogt, Matías Díaz, R. Paul Butler, Jeffrey D. Crane, Ian B. Thompson, & Pamela Arriagada. (2016) The Magellan PFS Planet Search Program: Radial Velocity and Stellar Abundance Analyses of the 360 AU, Metal-Poor Binary "Twins" HD 133131A . Astronomical Journal,. arXiv: 1608.06216v2
Orosz, J., Welsh, W., Carter, J., Fabrycky, D., Cochran, W., Endl, M., Ford, E., Haghighipour, N., MacQueen, P., Mazeh, T.... (2012) Kepler-47: A Transiting Circumbinary Multiplanet System. Science, 337(6101), 1511-1514. DOI: 10.1126/science.1228380
R. Di Stefano, & A. Ray. (2016) Globular Clusters as Cradles of Life and Advanced Civilizations. ASTROPHYSICAL JOURNAL , 827(1). arXiv: 1601.03455v1
Marcelo Tucci Maia, Jorge Melendez, & Ivan Ramirez. (2014) High precision abundances in the 16 Cyg binary system: a signature of the rocky core in the giant planet. ASTROPHYSICAL JOURNAL LETTERS , 790(2). arXiv: 1407.4132v1
Anglada-Escudé, G., Amado, P., Barnes, J., Berdiñas, Z., Butler, R., Coleman, G., de la Cueva, I., Dreizler, S., Endl, M., Giesers, B.... (2016) A terrestrial planet candidate in a temperate orbit around Proxima Centauri. Nature, 536(7617), 437-440. DOI: 10.1038/nature19106
Borucki, W., Agol, E., Fressin, F., Kaltenegger, L., Rowe, J., Isaacson, H., Fischer, D., Batalha, N., Lissauer, J., Marcy, G.... (2013) Kepler-62: A Five-Planet System with Planets of 1.4 and 1.6 Earth Radii in the Habitable Zone. Science, 340(6132), 587-590. DOI: 10.1126/science.1234702
Stephen R. Kane, & Dawn M. Gelino. (2014) On the Inclination and Habitability of the HD 10180 System. ASTROPHYSICAL JOURNAL, 792(2). arXiv: 1408.4150v1
Quasi-periodic pulsations (QPPs) with the characteristic time scales from a few seconds up to tens of minutes are frequently seen in the time profiles of solar and stellar flare emission (Nakariakov et al., 2016 ). Among all the possibilities of QPPs explanation, two reasons are discussed more actively: magnetohydrodynamic (MHD) [...]... Read more »
Kupriyanova et al. (2016) Diagnostics of the acceleration modulation process based on quasi-periodic variations of flare emission. Solar Physics. info:/
Type II and type III bursts are generated, via the plasma emission mechanism, when beams of suprathermal electrons interact with the ambient plasma generating radio emissions at the plasma frequency fp (the fundamental emission) or at its second harmonic 2fp (the harmonic emission) [see also previous CESRA highlights here and [...]... Read more »
V. Krupar et al. (2016) An Analysis of Interplanetary Solar Radio Emissions Associated with a Coronal Mass Ejection. Astrophys. J. Lett., 823, L5. info:/
The solar corona is a well known site for particle acceleration – examples range from spectacular large flares to the hard-to-observe nanoflares that are now a leading candidate for coronal heating.... Read more »
Prasad Subramanian and Claude Mercier. (2016) High resolution observations of radio noise storms in the solar corona . Astronomy . info:/
Can life be brought to celestial bodies outside our solar system, which are not permanently inhabitable? A new essay that has been published is trying to deal with this question. Over the last several years, the search for exoplanets has shown that very different types exist leading to new questions and a variety of possible answers.
... Read more »
Claudius Gros. (2016) Developing Ecospheres on Transiently Habitable Planets: The Genesis Project. Astrophysics and Space Science. arXiv: 1608.06087v2
What exactly are SETI signals?... Read more »
Carrigan Jr, R. (2006) Do potential SETI signals need to be decontaminated?. Acta Astronautica, 58(2), 112-117. DOI: 10.1016/j.actaastro.2005.05.004
The nature of the solar flare sub-THz emission (Kaufmann, 2012) with a positive spectral slope at 200-400 GHz is still not clear..... Read more »
Yuriy Tsap et al.*. (2016) On the thermal nature of 140 GHz emission from the 4 July 2012 solar flare. Advances in Space Research, 2016, 57, 1449. info:/
After the recent discovery of extensive fossilised riverbeds on Mars, the idea that the Red Planet could have been habitable 4 billion years ago has gained more traction.... Read more »
Davis, J., Balme, M., Grindrod, P., Williams, R., & Gupta, S. (2016) Extensive Noachian fluvial systems in Arabia Terra: Implications for early Martian climate. Geology. DOI: 10.1130/G38247.1
Impulsive 30 THz continuum bursts have been recently observed in solar flares, utilizing small telescopes with a unique and relatively simple optical setup concept (Kaufmann et al. 2015). The most intense burst was observed together with a GOES X2 class event on October 27, 2014, also detected at two sub-THz [...]... Read more »
Pierre Kaufmann et al. (2016) Bright 30 THz impulsive solar bursts . Journal of Geophys. Res. info:/
We discuss the results of recent observations of a solar U-burst harmonic pair in the frequency range 10-70 MHz, performed by the radio telescope UTR-2 ...... Read more »
Dorovskyy et al. (2016) Decameter U-burst Harmonic Pair from a High Loop by Dorovskyy et al. Solar Physics. info:/
Fermi (1949) introduced a fundamental stochastic process to solve the problem of particle energization (heating and/or acceleration) in space and astrophysical plasmas. The initial idea of Fermi with randomly moving scatterers (magnetic clouds), was soon replaced with a spectrum of low amplitude (δΒ/Β... Read more »
by L. Vlahos, T. Pisokas, H. Isliker, V. Tsiolis and A. Anastasiadis. (2016) Particle Acceleration and heating by turbulent reconnection. ApJ. info:/
Deep space missions could increase the chances of cardiovascular diseases, thereby increasing the chances of deaths in astronauts.
NASA’s Apollo program sent 9 manned missions and 24 astronauts above the low Earth orbit (LEO) during decades of 1960s and 1970s. Those missions also included Apollo 11, which was used to take Neil Armstrong and Buzz Aldrin to the moon. However, it appears that such beyond Earth missions........ Read more »
Delp, M., Charvat, J., Limoli, C., Globus, R., & Ghosh, P. (2016) Apollo Lunar Astronauts Show Higher Cardiovascular Disease Mortality: Possible Deep Space Radiation Effects on the Vascular Endothelium. Scientific Reports, 29901. DOI: 10.1038/srep29901
Water churns. Earth moves. Molecules jostle and chemicals mix. Between heaven and hell, a young planet finds itself in full flux. Developing. Forming. Star stuff rains down and forged elements bubble up. Then it happens. It seems as if it’s just another chemical match-up, another reaction in the vast library of possibilities. But it would […]... Read more »
Scharf C, & Cronin L. (2016) Quantifying the origins of life on a planetary scale. Proceedings of the National Academy of Sciences of the United States of America. PMID: 27382156
Is anybody out there? Where are all the alien civilizations? Even if (intelligent) life is very unlikely, the sheer size and age of the universe means that even long odds might have produced space faring civilizations. Yet, so far, nada. When people are considering the (im)probability of non-human space travellers, one thing always comes up: […]... Read more »
Frank A, & Sullivan WT 3rd. (2016) A New Empirical Constraint on the Prevalence of Technological Species in the Universe. Astrobiology. PMID: 27105054
Gravitational waves, detected by LIGO, might have implications for finding black holes.... Read more »
Abbott, B. (2016) Observation of Gravitational Waves from a Binary Black Hole Merger. Physical Review Letters, 116(6). DOI: 10.1103/PhysRevLett.116.061102
Emanuele Berti. (2016) Viewpoint: The First Sounds of Merging Black Holes. APS Physics 9 (2016) 17. arXiv: 1602.04476v2
Universe would end earlier than the anticipated time for the Sun to burn completely.
Scientific observation of the stars and galaxies in our universe are showing that the universe is continuously expanding, and the rate of this expansion is continuously increasing. After looking at this continuous expansion, one of the suggested possibilities for the future is that, the stars would die, everything in the universe will drift out, and t........ Read more »
Jose Beltran Jimenez, Ruth Lazkoz, Diego Saez-Gomez, & Vincenzo Salzano. (2016) Observational support for approaching cosmic doomsday. arXiv. arXiv: 1602.06211v1
According to a new model, Big Bang never happened and Universe existed forever without any beginning.
Physics Letters B
According to our present knowledge, Universe came into existence about 13.8 billion years ago. Before the existence of Universe, everything was in the form of a tiny point, which is also referred to as singularity. Therefore, it is assumed that everything in the Universe was present in that tiny point at that time. Then a........ Read more »
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