Experimental constraints on the ordinary chondrite shock darkening caused by asteroid collisions. (arXiv:2004.00625v1 [astro-ph.EP]) <a href="http://arxiv.org/find/astro-ph/1/au:+Kohout_T/0/1/0/all/0/1">T. Kohout</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Petrova_E/0/1/0/all/0/1">E. V. Petrova</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yakovlev_G/0/1/0/all/0/1">G. A. Yakovlev</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Grokhovsky_V/0/1/0/all/0/1">V. I. Grokhovsky</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Penttila_A/0/1/0/all/0/1">A. Penttil&#xe4;</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Maturilli_A/0/1/0/all/0/1">A. Maturilli</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Moreau_J/0/1/0/all/0/1">J.-G. Moreau</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Berzin_S/0/1/0/all/0/1">S. V. Berzin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wasiljeff_J/0/1/0/all/0/1">J. Wasiljeff</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Danilenko_I/0/1/0/all/0/1">I. A. Danilenko</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zamyatin_D/0/1/0/all/0/1">D. A. Zamyatin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Muftakhetdinova_R/0/1/0/all/0/1">R. […]

INTEGRAL constraints on primordial black holes and particle dark matter. (arXiv:2004.00627v1 [astro-ph.CO]) <a href="http://arxiv.org/find/astro-ph/1/au:+Laha_R/0/1/0/all/0/1">Ranjan Laha</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Munoz_J/0/1/0/all/0/1">Julian B. Mu&#xf1;oz</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Slatyer_T/0/1/0/all/0/1">Tracy R. Slatyer</a> The International Gamma-Ray Astrophysics Laboratory (INTEGRAL) satellite has yielded unprecedented measurements of the soft gamma-ray spectrum of our Galaxy. Here we use those measurements to set constraints on dark matter (DM) that […]

Massive donors in interacting binaries: impact of metallicity. (arXiv:2004.00628v1 [astro-ph.SR]) <a href="http://arxiv.org/find/astro-ph/1/au:+Klencki_J/0/1/0/all/0/1">Jakub Klencki</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nelemans_G/0/1/0/all/0/1">Gijs Nelemans</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Istrate_A/0/1/0/all/0/1">Alina Istrate</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pols_O/0/1/0/all/0/1">Onno Pols</a> Metallicity is known to significantly affect the radial expansion of a massive star: the lower the metallicity the more compact the star, especially during its post-MS evolution. We study the impact of this […]

Axion Kinetic Misalignment and Parametric Resonance from Inflation. (arXiv:2004.00629v1 [hep-ph]) <a href="http://arxiv.org/find/hep-ph/1/au:+Co_R/0/1/0/all/0/1">Raymond T. Co</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Hall_L/0/1/0/all/0/1">Lawrence J. Hall</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Harigaya_K/0/1/0/all/0/1">Keisuke Harigaya</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Olive_K/0/1/0/all/0/1">Keith A. Olive</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Verner_S/0/1/0/all/0/1">Sarunas Verner</a> Axion cold dark matter from standard misalignment typically requires a decay constant $f_a~gtrsim~10^{11}$ GeV. Kinetic misalignment and parametric resonance easily allow lower values of $f_a$ when the […]

X-ray annual modulation observed by XMM-Newton and Axion Quark Nugget Dark Matter. (arXiv:2004.00632v1 [astro-ph.HE]) <a href="http://arxiv.org/find/astro-ph/1/au:+Ge_S/0/1/0/all/0/1">Shuailiang Ge</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Rachmat_H/0/1/0/all/0/1">Hikari Rachmat</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Siddiqui_M/0/1/0/all/0/1">Md Shahriar Rahim Siddiqui</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Waerbeke_L/0/1/0/all/0/1">Ludovic Van Waerbeke</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhitnitsky_A/0/1/0/all/0/1">Ariel Zhitnitsky</a> The XMM-Newton observatory shows evidence with an $11 sigma$ confidence level for seasonal variation of the X-ray background in the near-Earth environment in […]

Deflection of the hypervelocity stars by the dance of the Milky Way and Large Magellanic Cloud. (arXiv:2004.00633v1 [astro-ph.GA]) <a href="http://arxiv.org/find/astro-ph/1/au:+Boubert_D/0/1/0/all/0/1">Douglas Boubert</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Erkal_D/0/1/0/all/0/1">Denis Erkal</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gualandris_A/0/1/0/all/0/1">Alessia Gualandris</a> Stars slingshotted by the supermassive black hole at the Galactic centre will escape the Milky Way so quickly that their trajectories will be almost straight lines. Previous works […]

Survey of Gravitationally-lensed Objects in HSC Imaging (SuGOHI). VI. Crowdsourced lens finding with Space Warps. (arXiv:2004.00634v1 [astro-ph.IM]) <a href="http://arxiv.org/find/astro-ph/1/au:+Sonnenfeld_A/0/1/0/all/0/1">Alessandro Sonnenfeld</a> (1 and 2), <a href="http://arxiv.org/find/astro-ph/1/au:+Verma_A/0/1/0/all/0/1">Aprajita Verma</a> (3), <a href="http://arxiv.org/find/astro-ph/1/au:+More_A/0/1/0/all/0/1">Anupreeta More</a> (2 and 4), <a href="http://arxiv.org/find/astro-ph/1/au:+Allen_C/0/1/0/all/0/1">Campbell Allen</a> (3), <a href="http://arxiv.org/find/astro-ph/1/au:+Beaten_E/0/1/0/all/0/1">Elisabeth Beaten</a> (5), <a href="http://arxiv.org/find/astro-ph/1/au:+Chan_J/0/1/0/all/0/1">James H. H. Chan</a> (6), <a href="http://arxiv.org/find/astro-ph/1/au:+Hutchings_R/0/1/0/all/0/1">Roger Hutchings</a> (3), <a href="http://arxiv.org/find/astro-ph/1/au:+Jaelani_A/0/1/0/all/0/1">Anton T. Jaelani</a> […]

Baryogenesis and Dark Matter from Freeze-In. (arXiv:2004.00636v1 [hep-ph]) <a href="http://arxiv.org/find/hep-ph/1/au:+Shuve_B/0/1/0/all/0/1">Brian Shuve</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Tucker_Smith_D/0/1/0/all/0/1">David Tucker-Smith</a> We propose a simple model in which the baryon asymmetry and dark matter are created via the decays and inverse decays of QCD-triplet scalars, at least one of which must be in the TeV mass range. Singlet fermions produced in these […]

WASP-4 is Accelerating Toward the Earth. (arXiv:2004.00637v1 [astro-ph.EP]) <a href="http://arxiv.org/find/astro-ph/1/au:+Bouma_L/0/1/0/all/0/1">L. G. Bouma</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Winn_J/0/1/0/all/0/1">J. N. Winn</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Howard_A/0/1/0/all/0/1">A. W. Howard</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Howell_S/0/1/0/all/0/1">S. B. Howell</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Isaacson_H/0/1/0/all/0/1">H. Isaacson</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Knutson_H/0/1/0/all/0/1">H. Knutson</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Matson_R/0/1/0/all/0/1">R. A. Matson</a> The orbital period of the hot Jupiter WASP-4b appears to be decreasing at a rate of $-8.64 pm 1.26$ msec/yr, based […]

A 1201 s Orbital Period Detached Binary: the First Double Helium Core White Dwarf LISA Verification Binary. (arXiv:2004.00641v1 [astro-ph.SR]) <a href="http://arxiv.org/find/astro-ph/1/au:+Brown_W/0/1/0/all/0/1">Warren R. Brown</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Kilic_M/0/1/0/all/0/1">Mukremin Kilic</a> (2), <a href="http://arxiv.org/find/astro-ph/1/au:+Bedard_A/0/1/0/all/0/1">A. Bedard</a> (3), <a href="http://arxiv.org/find/astro-ph/1/au:+Kosakowski_A/0/1/0/all/0/1">Alekzander Kosakowski</a> (2), <a href="http://arxiv.org/find/astro-ph/1/au:+Bergeron_P/0/1/0/all/0/1">P. Bergeron</a> (3) ((1) SAO, (2) OU, (3) UMontreal) We report the discovery of a 1201 s orbital […]

Phenomenology and Cosmology of No-Scale Attractor Models of Inflation. (arXiv:2004.00643v1 [hep-ph]) <a href="http://arxiv.org/find/hep-ph/1/au:+Ellis_J/0/1/0/all/0/1">John Ellis</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Nanopoulos_D/0/1/0/all/0/1">Dimitri V. Nanopoulos</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Olive_K/0/1/0/all/0/1">Keith A. Olive</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Verner_S/0/1/0/all/0/1">Sarunas Verner</a> We have recently proposed attractor models for modulus fixing, inflation, supersymmetry breaking and dark energy based on no-scale supergravity. In this paper we develop phenomenological and cosmological aspects of these […]

FRB Coherent Emission from Decay of Alfven Waves. (arXiv:2004.00644v1 [astro-ph.HE]) <a href="http://arxiv.org/find/astro-ph/1/au:+Kumar_P/0/1/0/all/0/1">Pawan Kumar</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bosnjak_Z/0/1/0/all/0/1">Z. Bosnjak</a> We present a model for FRBs where a large amplitude Alfven wave packet is launched by a disturbance near the surface of a magnetar, and a substantial fraction of the wave energy is converted to coherent radio waves at […]

Radiation Forces Constrain the FRB Mechanism. (arXiv:2004.00645v1 [astro-ph.HE]) <a href="http://arxiv.org/find/astro-ph/1/au:+Kumar_P/0/1/0/all/0/1">Pawan Kumar</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lu_W/0/1/0/all/0/1">Wenbin Lu</a> We provide constraints on Fast Radio Burst (FRB) models by careful considerations of radiation forces associated with these powerful transients. We find that the induced-Compton scatterings of the coherent radiation by electrons/positrons accelerate particles to very large Lorentz factors (LF) in […]

Maps of the number of HI clouds along the line of sight at high galactic latitude. (arXiv:2004.00647v1 [astro-ph.GA]) <a href="http://arxiv.org/find/astro-ph/1/au:+Panopoulou_G/0/1/0/all/0/1">G. V. Panopoulou</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lenz_D/0/1/0/all/0/1">D. Lenz</a> Characterizing the structure of the Galactic Interstellar Medium (ISM) in three dimensions is of high importance for accurate modeling of dust emission as a foreground to the Cosmic Microwave Background […]

A Triple Rollover: A third multiply-imaged source at z~6 behind the Jackpot gravitational lens. (arXiv:2004.00649v1 [astro-ph.CO]) <a href="http://arxiv.org/find/astro-ph/1/au:+Collett_T/0/1/0/all/0/1">Thomas E. Collett</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Smith_R/0/1/0/all/0/1">Russell J. Smith</a> Using deep integral-field spectroscopy with MUSE, we have identified a doubly-imaged Ly alpha source at redshift 5.975 behind the z=0.222 lens galaxy J0946+1006 (‘the Jackpot’). The source separation implies an Einstein […]

The mass gap, the spin gap, and the origin of merging binary black holes. (arXiv:2004.00650v1 [astro-ph.HE]) <a href="http://arxiv.org/find/astro-ph/1/au:+Baibhav_V/0/1/0/all/0/1">Vishal Baibhav</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gerosa_D/0/1/0/all/0/1">Davide Gerosa</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Berti_E/0/1/0/all/0/1">Emanuele Berti</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wong_K/0/1/0/all/0/1">Kaze W. K. Wong</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Helfer_T/0/1/0/all/0/1">Thomas Helfer</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mould_M/0/1/0/all/0/1">Matthew Mould</a> Two of the dominant channels to produce the black-hole binary mergers observed by LIGO and Virgo are believed to […]

Optimized statistical approach for combining multi-messenger data for neutron star equation of state inference. (arXiv:2004.00656v1 [astro-ph.HE]) <a href="http://arxiv.org/find/astro-ph/1/au:+Raithel_C/0/1/0/all/0/1">Carolyn Raithel</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ozel_F/0/1/0/all/0/1">Feryal Ozel</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Psaltis_D/0/1/0/all/0/1">Dimitrios Psaltis</a> The neutron star equation of state (EOS) is now being constrained from a diverse set of multi-messenger data, including gravitational waves from binary neutron star mergers, X-ray observations of the […]

Is superorbital modulation in SMC X-1 caused by absorption in warped precessing accretion disc?. (arXiv:2004.00664v1 [astro-ph.HE]) <a href="http://arxiv.org/find/astro-ph/1/au:+Pradhan_P/0/1/0/all/0/1">Pragati Pradhan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Maitra_C/0/1/0/all/0/1">Chandreyee Maitra</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Paul_B/0/1/0/all/0/1">Biswajit Paul</a> We present a broadband spectral-timing analysis of SMC X-1 at different intensity states of its super-orbital variation using 10 Suzaku and 6 NuSTAR observations. The spectrum in all the states […]

Revisiting non-linearity in binary black hole mergers. (arXiv:2004.00671v1 [gr-qc]) <a href="http://arxiv.org/find/gr-qc/1/au:+Okounkova_M/0/1/0/all/0/1">Maria Okounkova</a> Recently, it has been shown that with the inclusion of overtones, the post-merger gravitational waveform at infinity of a binary black hole system is well-modelled using pure linear theory. However, given that a binary black hole merger is expected to be highly non-linear, […]

Generating primordial features at large scales in two field models of inflation. (arXiv:2004.00672v1 [astro-ph.CO]) <a href="http://arxiv.org/find/astro-ph/1/au:+Braglia_M/0/1/0/all/0/1">Matteo Braglia</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hazra_D/0/1/0/all/0/1">Dhiraj Kumar Hazra</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sriramkumar_L/0/1/0/all/0/1">Lakshmanan Sriramkumar</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Finelli_F/0/1/0/all/0/1">Fabio Finelli</a> We investigate the generation of features at large scales in the primordial power spectrum (PPS) when inflation is driven by two scalar fields. In canonical single field models […]