Artemis Missions Should Bring Ice Home From the Moon Too

Artemis Missions Should Bring Ice Home From the Moon Too In a recent white paper, a team of scientists proposed that NASA’s Artemis astronauts should also bring back samples of lunar ice to determine where the Moon’s water comes from The post Artemis Missions Should Bring Ice Home From the Moon Too appeared first on […]

Solar Cycle 25 has officially started in December 2019

Solar Cycle 25 has officially started in December 2019 Breaking news today from the Solar Cycle 25 Prediction Panel! It is now official, the solar minimum between Solar Cycle 24 and 25 took place December 2019 when the 13-month smoothed sunspot number fell to 1.8. This means that we’ve been in Solar Cycle 25 since […]

The surprising accuracy of isothermal Jeans modelling of self-interacting dark matter density profiles. (arXiv:2009.07844v1 [astro-ph.CO])

The surprising accuracy of isothermal Jeans modelling of self-interacting dark matter density profiles. (arXiv:2009.07844v1 [astro-ph.CO]) <a href="http://arxiv.org/find/astro-ph/1/au:+Robertson_A/0/1/0/all/0/1">Andrew Robertson</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Massey_R/0/1/0/all/0/1">Richard Massey</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Eke_V/0/1/0/all/0/1">Vincent Eke</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Schaye_J/0/1/0/all/0/1">Joop Schaye</a> (2), <a href="http://arxiv.org/find/astro-ph/1/au:+Theuns_T/0/1/0/all/0/1">Tom Theuns</a> (1) ((1) Durham-ICC, (2) Leiden Observatory) Recent claims of observational evidence for self-interacting dark matter (SIDM) have relied on a semi-analytic […]

Superradiance — the 2020 Edition. (arXiv:1501.06570v7 [gr-qc] UPDATED)

Superradiance — the 2020 Edition. (arXiv:1501.06570v7 [gr-qc] UPDATED) <a href="http://arxiv.org/find/gr-qc/1/au:+Brito_R/0/1/0/all/0/1">Richard Brito</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Cardoso_V/0/1/0/all/0/1">Vitor Cardoso</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Pani_P/0/1/0/all/0/1">Paolo Pani</a> Superradiance is a radiation enhancement process that involves dissipative systems. With a 60 year-old history, superradiance has played a prominent role in optics, quantum mechanics and especially in relativity and astrophysics. In General Relativity, black-hole superradiance is permitted […]

Spurious Point Source Signals in the Galactic Center Excess. (arXiv:2002.12370v2 [astro-ph.HE] UPDATED)

Spurious Point Source Signals in the Galactic Center Excess. (arXiv:2002.12370v2 [astro-ph.HE] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Leane_R/0/1/0/all/0/1">Rebecca K. Leane</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Slatyer_T/0/1/0/all/0/1">Tracy R. Slatyer</a> We re-examine evidence that the Galactic Center Excess (GCE) originates primarily from point sources (PSs). We show that in our region of interest, non-Poissonian template fitting (NPTF) evidence for GCE PSs is an artifact of […]

The Cosmological Heavy Ion Collider: Fast Thermalization after Cosmic Inflation. (arXiv:2001.03633v3 [hep-th] UPDATED)

The Cosmological Heavy Ion Collider: Fast Thermalization after Cosmic Inflation. (arXiv:2001.03633v3 [hep-th] UPDATED) <a href="http://arxiv.org/find/hep-th/1/au:+McDonough_E/0/1/0/all/0/1">Evan McDonough</a> Heavy-ion colliders have revealed the process of “fast thermalization”. This experimental breakthrough has led to new theoretical tools to study the thermalization process at both weak and strong coupling. We apply this to the reheating epoch of inflationary cosmology, […]

KMT-2019-BLG-0842Lb: A Cold Planet Below the Uranus/Sun Mass Ratio. (arXiv:1912.03822v2 [astro-ph.EP] UPDATED)

KMT-2019-BLG-0842Lb: A Cold Planet Below the Uranus/Sun Mass Ratio. (arXiv:1912.03822v2 [astro-ph.EP] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Jung_Y/0/1/0/all/0/1">Youn Kil Jung</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Udalski_A/0/1/0/all/0/1">Andrzej Udalski</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zang_W/0/1/0/all/0/1">Weicheng Zang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bond_I/0/1/0/all/0/1">Ian A. Bond</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yee_J/0/1/0/all/0/1">Jennifer C. Yee</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Han_C/0/1/0/all/0/1">Cheongho Han</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Albrow_M/0/1/0/all/0/1">Michael D. Albrow</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Chung_S/0/1/0/all/0/1">Sun-Ju Chung</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gould_A/0/1/0/all/0/1">Andrew Gould</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hwang_K/0/1/0/all/0/1">Kyu-Ha Hwang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ryu_Y/0/1/0/all/0/1">Yoon-Hyun Ryu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Shin_I/0/1/0/all/0/1">In-Gu Shin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Shvartzvald_Y/0/1/0/all/0/1">Yossi Shvartzvald</a>, […]

A possible radio signal of annihilating dark matter in the Abell 4038 cluster. (arXiv:1912.03640v3 [astro-ph.HE] UPDATED)

A possible radio signal of annihilating dark matter in the Abell 4038 cluster. (arXiv:1912.03640v3 [astro-ph.HE] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Chan_M/0/1/0/all/0/1">Man Ho Chan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lee_C/0/1/0/all/0/1">Chak Man Lee</a> In the past decade, some telescopes (e.g. Fermi-LAT, AMS and DAMPE) were launched to detect the signals of annihilating dark matter in our Galaxy. Although some excess of gamma rays, anti-protons […]

Searching for Phosphorus in Other Stars

Searching for Phosphorus in Other Stars The Search for Life can be a lot messier than it sounds. The three words make a nice, tidy title, but what it entails is extraordinarily difficult. How, in this vast galaxy, can we find life and the planets or moons that might host it? We’re barely at the […]

The Space Court Foundation is Now in Session!

The Space Court Foundation is Now in Session! The Space Court Foundation hopes to play a pivotal role in the evolving domain of space law, which is going to become very important in the coming years! The post The Space Court Foundation is Now in Session! appeared first on Universe Today. Universe Today Go to […]

VLBA makes first direct distance measurement to magnetar

VLBA makes first direct distance measurement to magnetar Astronomers using the National Science Foundation’s Very Long Baseline Array (VLBA) have made the first direct geometric measurement of the distance to a magnetar within our Milky Way Galaxy—a measurement that could help determine if magnetars are the sources of the long-mysterious Fast Radio Bursts (FRBs). phys.org […]

How planetary nebulae get their shapes

How planetary nebulae get their shapes About 7.5 billion years from now, our sun will have converted most of its hydrogen fuel into helium through fusion, and then burned most of that helium into carbon and oxygen. It will have swollen to a size large enough to fill the solar system nearly to the current […]

Nontrivial topology in the continuous spectrum of a magnetized plasma. (arXiv:1909.07910v4 [physics.plasm-ph] UPDATED)

Nontrivial topology in the continuous spectrum of a magnetized plasma. (arXiv:1909.07910v4 [physics.plasm-ph] UPDATED) <a href="http://arxiv.org/find/physics/1/au:+Parker_J/0/1/0/all/0/1">Jeffrey B. Parker</a>, <a href="http://arxiv.org/find/physics/1/au:+Burby_J/0/1/0/all/0/1">J. W. Burby</a>, <a href="http://arxiv.org/find/physics/1/au:+Marston_J/0/1/0/all/0/1">J. B. Marston</a>, <a href="http://arxiv.org/find/physics/1/au:+Tobias_S/0/1/0/all/0/1">Steven M. Tobias</a> Classification of matter through topological phases and topological edge states between distinct materials has been a subject of great interest recently. While lattices have been the […]

An Updated Study of Potential Targets for Ariel. (arXiv:1905.04959v2 [astro-ph.EP] UPDATED)

An Updated Study of Potential Targets for Ariel. (arXiv:1905.04959v2 [astro-ph.EP] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Edwards_B/0/1/0/all/0/1">Billy Edwards</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mugnai_L/0/1/0/all/0/1">Lorenzo Mugnai</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tinetti_G/0/1/0/all/0/1">Giovanna Tinetti</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pascale_E/0/1/0/all/0/1">Enzo Pascale</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sarkar_S/0/1/0/all/0/1">Subhajit Sarkar</a> Ariel has been selected as ESA’s M4 mission for launch in 2028 and is designed for the characterisation of a large and diverse population of exoplanetary atmospheres to provide […]

Towards a more complex description of chemical profiles in exoplanets retrievals: A 2-layer parameterisation. (arXiv:1903.11180v3 [astro-ph.EP] UPDATED)

Towards a more complex description of chemical profiles in exoplanets retrievals: A 2-layer parameterisation. (arXiv:1903.11180v3 [astro-ph.EP] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Changeat_Q/0/1/0/all/0/1">Quentin Changeat</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Edwards_B/0/1/0/all/0/1">Billy Edwards</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Waldmann_I/0/1/0/all/0/1">Ingo Waldmann</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tinetti_G/0/1/0/all/0/1">Giovanna Tinetti</a> State of the art spectral retrieval models of exoplanet atmospheres assume constant chemical profiles with altitude. This assumption is justified by the information content of current […]

Secondary cosmic-ray nucleus spectra disfavor particle transport in the Galaxy without reacceleration. (arXiv:1810.03141v2 [astro-ph.HE] UPDATED)

Secondary cosmic-ray nucleus spectra disfavor particle transport in the Galaxy without reacceleration. (arXiv:1810.03141v2 [astro-ph.HE] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Yuan_Q/0/1/0/all/0/1">Qiang Yuan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhu_C/0/1/0/all/0/1">Cheng-Rui Zhu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bi_X/0/1/0/all/0/1">Xiao-Jun Bi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wei_D/0/1/0/all/0/1">Da-Ming Wei</a> The precise observations of Galactic cosmic ray fluxes of the secondary family, such as Li, Be, B, are expected to have significant implications on our understanding of the […]

Single metric universe I :Modified Newtonian Mechanics. (arXiv:1601.00376v6 [astro-ph.CO] UPDATED)

Single metric universe I :Modified Newtonian Mechanics. (arXiv:1601.00376v6 [astro-ph.CO] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Wong_C/0/1/0/all/0/1">C. C. Wong</a> (U. of Hong Kong) A few years ago Baker cite{baker} proposed a Lema$hat{i}$tre-Tolman metric which could vary smoothly between the Schwarzschild metric at small scales and the Friedmann-Robertson-Walker (FRW) metric at large scales. As it stands, by implementing the Bona-Stela construction […]

Recombination-independent determination of the sound horizon and the Hubble constant from BAO. (arXiv:2009.08455v1 [astro-ph.CO])

Recombination-independent determination of the sound horizon and the Hubble constant from BAO. (arXiv:2009.08455v1 [astro-ph.CO]) <a href="http://arxiv.org/find/astro-ph/1/au:+Pogosian_L/0/1/0/all/0/1">Levon Pogosian</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhao_G/0/1/0/all/0/1">Gong-Bo Zhao</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Jedamzik_K/0/1/0/all/0/1">Karsten Jedamzik</a> The Hubble tension and attempts to resolve it by modifying the physics of (or at) recombination motivate finding ways to determine $H_0$ and the sound horizon at the epoch of baryon decoupling […]