Did Ancient Martian Life Eat Rocks For Food?

Did Ancient Martian Life Eat Rocks For Food? Some lucky astronomers get to work with some of the rarest material in the world.  Real Martian meteorites are extraordinarily rare, but are invaluable in terms of understanding Martian geology. Now, one of the most famous meteorites, nicknamed “Black Beauty”, is helping shed light on a much […]

Some Earth Life Could Already Survive on Mars

Some Earth Life Could Already Survive on Mars Mars’ surface is a harsh environment for life.  But life on Earth is notoriously resilient as well.  No one is quite sure yet how microbes from Earth would fare on the Martian surface.  However, the impact of a potential transmigration of microbes to the red planet could […]

Nested sampling with any prior you like. (arXiv:2102.12478v1 [astro-ph.IM])

Nested sampling with any prior you like. (arXiv:2102.12478v1 [astro-ph.IM]) <a href="http://arxiv.org/find/astro-ph/1/au:+Alsing_J/0/1/0/all/0/1">Justin Alsing</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Handley_W/0/1/0/all/0/1">Will Handley</a> Nested sampling is an important tool for conducting Bayesian analysis in Astronomy and other fields, both for sampling complicated posterior distributions for parameter inference, and for computing marginal likelihoods for model comparison. One technical obstacle to using nested sampling in […]

Observation of the $alpha$ Carinid meteor shower 2020 unexpected outburst. (arXiv:2102.13043v1 [astro-ph.EP])

Observation of the $alpha$ Carinid meteor shower 2020 unexpected outburst. (arXiv:2102.13043v1 [astro-ph.EP]) <a href="http://arxiv.org/find/astro-ph/1/au:+Bruzzone_J/0/1/0/all/0/1">Juan Sebastian Bruzzone</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Weryk_R/0/1/0/all/0/1">Robert Weryk</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Janches_D/0/1/0/all/0/1">Diego Janches</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Baumann_C/0/1/0/all/0/1">Carsten Baumann</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Stober_G/0/1/0/all/0/1">Gunter Stober</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hormaechea_J/0/1/0/all/0/1">Jose Luis Hormaechea</a> We present observations of the sudden outburst of the $alpha$ Carinid meteor shower recorded with the Southern Argentina Agile MEteor Radar-Orbital System (SAAMER-OS) […]

ASASSN-18am/SN 2018gk : An overluminous Type IIb supernova from a massive progenitor. (arXiv:2007.00008v2 [astro-ph.HE] UPDATED)

ASASSN-18am/SN 2018gk : An overluminous Type IIb supernova from a massive progenitor. (arXiv:2007.00008v2 [astro-ph.HE] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Bose_S/0/1/0/all/0/1">Subhash Bose</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dong_S/0/1/0/all/0/1">Subo Dong</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kochanek_C/0/1/0/all/0/1">C. S. Kochanek</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Stritzinger_M/0/1/0/all/0/1">M. D. Stritzinger</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ashall_C/0/1/0/all/0/1">Chris Ashall</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Benetti_S/0/1/0/all/0/1">Stefano Benetti</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Falco_E/0/1/0/all/0/1">E. Falco</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Filippenko_A/0/1/0/all/0/1">Alexei V. Filippenko</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pastorello_A/0/1/0/all/0/1">Andrea Pastorello</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Prieto_J/0/1/0/all/0/1">Jose L. Prieto</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Somero_A/0/1/0/all/0/1">Auni Somero</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sukhbold_T/0/1/0/all/0/1">Tuguldur Sukhbold</a>, […]

Two-timescale evolution of extreme-mass-ratio inspirals: waveform generation scheme for quasicircular orbits in Schwarzschild spacetime. (arXiv:2006.11263v3 [gr-qc] UPDATED)

Two-timescale evolution of extreme-mass-ratio inspirals: waveform generation scheme for quasicircular orbits in Schwarzschild spacetime. (arXiv:2006.11263v3 [gr-qc] UPDATED) <a href="http://arxiv.org/find/gr-qc/1/au:+Miller_J/0/1/0/all/0/1">Jeremy Miller</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Pound_A/0/1/0/all/0/1">Adam Pound</a> Extreme-mass-ratio inspirals, in which a stellar-mass compact object spirals into a supermassive black hole in a galactic core, are expected to be key sources for LISA. Modelling these systems with sufficient accuracy […]

Mass accretion rate of clusters of galaxies: CIRS and HeCS. (arXiv:2005.11562v2 [astro-ph.CO] UPDATED)

Mass accretion rate of clusters of galaxies: CIRS and HeCS. (arXiv:2005.11562v2 [astro-ph.CO] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Pizzardo_M/0/1/0/all/0/1">M. Pizzardo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gioia_S/0/1/0/all/0/1">S. Di Gioia</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Diaferio_A/0/1/0/all/0/1">A. Diaferio</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Boni_C/0/1/0/all/0/1">C. De Boni</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Serra_A/0/1/0/all/0/1">A. L. Serra</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Geller_M/0/1/0/all/0/1">M. J. Geller</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sohn_J/0/1/0/all/0/1">J. Sohn</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Rines_K/0/1/0/all/0/1">K. Rines</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Baldi_M/0/1/0/all/0/1">M. Baldi</a> We use a new spherical accretion recipe tested on N-body simulations […]

Short-range correlations effects on the deformability of neutron stars. (arXiv:2003.04471v2 [nucl-th] UPDATED)

Short-range correlations effects on the deformability of neutron stars. (arXiv:2003.04471v2 [nucl-th] UPDATED) <a href="http://arxiv.org/find/nucl-th/1/au:+Souza_L/0/1/0/all/0/1">Lucas A. Souza</a>, <a href="http://arxiv.org/find/nucl-th/1/au:+Dutra_M/0/1/0/all/0/1">Mariana Dutra</a>, <a href="http://arxiv.org/find/nucl-th/1/au:+Lenzi_C/0/1/0/all/0/1">C&#xe9;sar H. Lenzi</a>, <a href="http://arxiv.org/find/nucl-th/1/au:+Lourenco_O/0/1/0/all/0/1">Odilon Louren&#xe7;o</a> In the present work, we investigate the effects of short-range correlations (SRC) on the dimensionless deformability of the binary neutron system related to the GW170817 event. We implemented phenomenological […]

Radial Distributions of Coronal Electron Temperatures: specificities of the DYN model. (arXiv:2002.07495v3 [astro-ph.SR] UPDATED)

Radial Distributions of Coronal Electron Temperatures: specificities of the DYN model. (arXiv:2002.07495v3 [astro-ph.SR] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Lemaire_J/0/1/0/all/0/1">Joseph F. Lemaire</a> (1 and 2), <a href="http://arxiv.org/find/astro-ph/1/au:+Katsiyannis_A/0/1/0/all/0/1">Athanassios C. Katsiyannis</a> (3) ((1) Universite Catholique de Louvain, (2) Royal Belgian Institute for Space Aeronomy, (3) Royal Observatory of Belgium) This paper is a follow up of the article where Lemaire and […]

Detection of Spectral Variations of Anomalous Microwave Emission with QUIJOTE and C-BASS. (arXiv:2001.07159v2 [astro-ph.GA] UPDATED)

Detection of Spectral Variations of Anomalous Microwave Emission with QUIJOTE and C-BASS. (arXiv:2001.07159v2 [astro-ph.GA] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Cepeda_Arroita_R/0/1/0/all/0/1">R. Cepeda-Arroita</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Harper_S/0/1/0/all/0/1">S. Harper</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Dickinson_C/0/1/0/all/0/1">C. Dickinson</a> (1, 2), <a href="http://arxiv.org/find/astro-ph/1/au:+Rubino_Martin_J/0/1/0/all/0/1">J. A. Rubi&#xf1;o-Mart&#xed;n</a> (3, 4), <a href="http://arxiv.org/find/astro-ph/1/au:+Genova_Santos_R/0/1/0/all/0/1">R. T. G&#xe9;nova-Santos</a> (3, 4), <a href="http://arxiv.org/find/astro-ph/1/au:+Taylor_A/0/1/0/all/0/1">Angela C. Taylor</a> (5), <a href="http://arxiv.org/find/astro-ph/1/au:+Pearson_T/0/1/0/all/0/1">T. J. Pearson</a> (2), <a href="http://arxiv.org/find/astro-ph/1/au:+Ashdown_M/0/1/0/all/0/1">M. Ashdown</a> (6, 7), […]

Sound velocity in dense stellar matter with strangeness and compact stars. (arXiv:1906.00826v3 [nucl-th] UPDATED)

Sound velocity in dense stellar matter with strangeness and compact stars. (arXiv:1906.00826v3 [nucl-th] UPDATED) <a href="http://arxiv.org/find/nucl-th/1/au:+Xia_C/0/1/0/all/0/1">Chengjun Xia</a>, <a href="http://arxiv.org/find/nucl-th/1/au:+Zhu_Z/0/1/0/all/0/1">Zhenyu Zhu</a>, <a href="http://arxiv.org/find/nucl-th/1/au:+Zhou_X/0/1/0/all/0/1">Xia Zhou</a>, <a href="http://arxiv.org/find/nucl-th/1/au:+Li_A/0/1/0/all/0/1">Ang Li</a> The phase state of dense matter in the intermediate density range ($sim$1-10 times the nuclear saturation density) is both intriguing and unclear and could have important observable effects in […]

One Type of Fast Radio Bursts… Solved?

One Type of Fast Radio Bursts… Solved? Every now and then there is a burst of radio light in the sky. It lasts for just milliseconds before fading. It’s known as a Fast Radio Burst (FRB), and they are difficult to observe and study. We know they are powerful bursts of energy, but we aren’t […]

The Core Of The Milky Way Is An Extreme Place

The Core Of The Milky Way Is An Extreme Place Astronomers always like to look at incredibly violent places.  Violence, in the astronomical sense, makes for rare conditions that can explain much about our universe.  One of the violent places that astronomers love to study is the center of our Milky Way galaxy.  Now, astronomers […]

Upper Limit on Brackett-gamma Emission from the Immediate Accretion Flow onto the Galactic Black Hole. (arXiv:2102.13096v1 [astro-ph.GA])

Upper Limit on Brackett-gamma Emission from the Immediate Accretion Flow onto the Galactic Black Hole. (arXiv:2102.13096v1 [astro-ph.GA]) <a href="http://arxiv.org/find/astro-ph/1/au:+Ciurlo_A/0/1/0/all/0/1">Anna Ciurlo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Morris_M/0/1/0/all/0/1">Mark R. Morris</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Campbell_R/0/1/0/all/0/1">Randall D. Campbell</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ghez_A/0/1/0/all/0/1">Andrea M. Ghez</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Do_T/0/1/0/all/0/1">Tuan Do</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Chu_D/0/1/0/all/0/1">Devin S. Chu</a> We present the first observational constraint on the Br-gamma recombination line emission associated with the supermassive […]

Time-series and Phasecurve Photometry of Episodically-Active Asteroid (6478) Gault in a Quiescent State Using APO, GROWTH, P200 and ZTF. (arXiv:2102.13017v1 [astro-ph.EP])

Time-series and Phasecurve Photometry of Episodically-Active Asteroid (6478) Gault in a Quiescent State Using APO, GROWTH, P200 and ZTF. (arXiv:2102.13017v1 [astro-ph.EP]) <a href="http://arxiv.org/find/astro-ph/1/au:+Purdum_J/0/1/0/all/0/1">Josiah N. Purdum</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lin_Z/0/1/0/all/0/1">Zhong-Yi Lin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bolin_B/0/1/0/all/0/1">Bryce T. Bolin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sharma_K/0/1/0/all/0/1">Kritti Sharma</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Choi_P/0/1/0/all/0/1">Phillip I. Choi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bhalerao_V/0/1/0/all/0/1">Varun Bhalerao</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kumar_H/0/1/0/all/0/1">Harsh Kumar</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Quimby_R/0/1/0/all/0/1">Robert Quimby</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Roestel_J/0/1/0/all/0/1">Joannes C. Van Roestel</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhai_C/0/1/0/all/0/1">Chengxing […]

Gravitational wave signatures from discrete flavor symmetries. (arXiv:2009.01903v3 [hep-ph] UPDATED)

Gravitational wave signatures from discrete flavor symmetries. (arXiv:2009.01903v3 [hep-ph] UPDATED) <a href="http://arxiv.org/find/hep-ph/1/au:+Gelmini_G/0/1/0/all/0/1">Graciela B. Gelmini</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Pascoli_S/0/1/0/all/0/1">Silvia Pascoli</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Vitagliano_E/0/1/0/all/0/1">Edoardo Vitagliano</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Zhou_Y/0/1/0/all/0/1">Ye-Ling Zhou</a> Non-Abelian discrete symmetries have been widely used to explain the patterns of lepton masses and flavor mixing. In these models, a given symmetry is assumed at a high scale and then is […]

A Forty Year Journey. (arXiv:2102.13000v1 [astro-ph.GA])

A Forty Year Journey. (arXiv:2102.13000v1 [astro-ph.GA]) <a href="http://arxiv.org/find/astro-ph/1/au:+Genzel_R/0/1/0/all/0/1">Reinhard Genzel</a> I try to describe the stepwise progress in proving that massive black holes do exist in the Universe. As compared to forty years ago, measurements have pushed the ‘size’ of the 4 million solar mass concentration in the Galactic Center downward by almost 10^6, and its […]