A New Way to Measure the Age of the Milky Way

A New Way to Measure the Age of the Milky Way Using data collected by Kepler’s K2 observation campaign, an international team of scientists was able to more accurately predict the ages of stars in the Milky Way’s thick disk. The post A New Way to Measure the Age of the Milky Way appeared first […]

Simultaneous detection of an intrinsic absorber and a compact jet emission in the X-ray binary IGR J17091-3624 during a hard accretion state. (arXiv:1912.02180v1 [astro-ph.HE])

Simultaneous detection of an intrinsic absorber and a compact jet emission in the X-ray binary IGR J17091-3624 during a hard accretion state. (arXiv:1912.02180v1 [astro-ph.HE]) <a href="http://arxiv.org/find/astro-ph/1/au:+Gatuzz_E/0/1/0/all/0/1">E. Gatuzz</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Trigo_M/0/1/0/all/0/1">M. D&#xed;az Trigo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Miller_Jones_J/0/1/0/all/0/1">J.C.A. Miller-Jones</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Migliari_S/0/1/0/all/0/1">S. Migliari</a> We present a detailed analysis of three XMM-Newton observations of the black hole low-mass X-ray binary IGR~J17091-3624 taken […]

Multi-Gaussian fitting Algorithm to determine multi-band photometry and photometric redshifts of LABOCA and Herschel sources in proto-cluster environments. (arXiv:1912.02183v1 [astro-ph.IM])

Multi-Gaussian fitting Algorithm to determine multi-band photometry and photometric redshifts of LABOCA and Herschel sources in proto-cluster environments. (arXiv:1912.02183v1 [astro-ph.IM]) <a href="http://arxiv.org/find/astro-ph/1/au:+Lee_Y/0/1/0/all/0/1">Youngik Lee</a> This research focuses on identifying high redshift galaxies from LABOCA(LArge APEX BOlometer CAmera) and SPIRE(The Spectral and Photometric Imaging Receiver) maps towards proto-cluster candidates initially selected from the SPT (South pole telescope) […]

Proton-synchrotron as the radiation mechanism of the prompt emission of GRBs?. (arXiv:1912.02185v1 [astro-ph.HE])

Proton-synchrotron as the radiation mechanism of the prompt emission of GRBs?. (arXiv:1912.02185v1 [astro-ph.HE]) <a href="http://arxiv.org/find/astro-ph/1/au:+Ghisellini_G/0/1/0/all/0/1">G. Ghisellini</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Ghirlanda_G/0/1/0/all/0/1">G. Ghirlanda</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Oganesyan_G/0/1/0/all/0/1">G. Oganesyan</a> (2,3,4), <a href="http://arxiv.org/find/astro-ph/1/au:+Ascenzi_S/0/1/0/all/0/1">S. Ascenzi</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Nava_L/0/1/0/all/0/1">L. Nava</a> (1,5,6,7), <a href="http://arxiv.org/find/astro-ph/1/au:+Celotti_A/0/1/0/all/0/1">A. Celotti</a> (8,1,6,7), <a href="http://arxiv.org/find/astro-ph/1/au:+Salafia_O/0/1/0/all/0/1">O.S. Salafia</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Ravasio_E/0/1/0/all/0/1">E.M. Ravasio</a> (1,9), <a href="http://arxiv.org/find/astro-ph/1/au:+Ronchi_M/0/1/0/all/0/1">M. Ronchi</a> (1) (1:OA Brera, 2: GSSI, 3: INFN […]

Elemental Abundances in M31: The Kinematics and Chemical Evolution of Dwarf Spheroidal Satellite Galaxies. (arXiv:1912.02186v1 [astro-ph.GA])

Elemental Abundances in M31: The Kinematics and Chemical Evolution of Dwarf Spheroidal Satellite Galaxies. (arXiv:1912.02186v1 [astro-ph.GA]) <a href="http://arxiv.org/find/astro-ph/1/au:+Kirby_E/0/1/0/all/0/1">Evan N. Kirby</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Gilbert_K/0/1/0/all/0/1">Karoline M. Gilbert</a> (2 and 3), <a href="http://arxiv.org/find/astro-ph/1/au:+Escala_I/0/1/0/all/0/1">Ivanna Escala</a> (1 and 4), <a href="http://arxiv.org/find/astro-ph/1/au:+Wojno_J/0/1/0/all/0/1">Jennifer Wojno</a> (3), <a href="http://arxiv.org/find/astro-ph/1/au:+Guhathakurta_P/0/1/0/all/0/1">Puragra Guhathakurta</a> (5), <a href="http://arxiv.org/find/astro-ph/1/au:+Majewski_S/0/1/0/all/0/1">Steven R. Majewski</a> (6), <a href="http://arxiv.org/find/astro-ph/1/au:+Beaton_R/0/1/0/all/0/1">Rachael L. Beaton</a> (4 and 7) ((1) […]

4-volume cutoff measure of the multiverse. (arXiv:1912.02187v1 [hep-th])

4-volume cutoff measure of the multiverse. (arXiv:1912.02187v1 [hep-th]) <a href="http://arxiv.org/find/hep-th/1/au:+Vilenkin_A/0/1/0/all/0/1">Alexander Vilenkin</a>, <a href="http://arxiv.org/find/hep-th/1/au:+Yamada_M/0/1/0/all/0/1">Masaki Yamada</a> Predictions in an eternally inflating multiverse are meaningless unless we specify the probability measure. The scale-factor cutoff is perhaps the simplest and most successful measure which avoid catastrophic problems such as the youngness paradox, runaway problem, and Boltzmann brain problem, but […]

The correlations between optical/UV broad lines and X-ray emission for a large sample of quasars. (arXiv:1912.02189v1 [astro-ph.GA])

The correlations between optical/UV broad lines and X-ray emission for a large sample of quasars. (arXiv:1912.02189v1 [astro-ph.GA]) <a href="http://arxiv.org/find/astro-ph/1/au:+Timlin_J/0/1/0/all/0/1">J. D. Timlin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Brandt_W/0/1/0/all/0/1">W. N. Brandt</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ni_Q/0/1/0/all/0/1">Q. Ni</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Luo_B/0/1/0/all/0/1">B. Luo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pu_X/0/1/0/all/0/1">Xingting Pu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Schneider_D/0/1/0/all/0/1">D. P. Schneider</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Vivek_M/0/1/0/all/0/1">M. Vivek</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yi_W/0/1/0/all/0/1">W. Yi</a> We present Chandra observations of 2106 radio-quiet quasars in the redshift […]

Is the expansion of the universe accelerating? All signs still point to yes. (arXiv:1912.02191v1 [astro-ph.CO])

Is the expansion of the universe accelerating? All signs still point to yes. (arXiv:1912.02191v1 [astro-ph.CO]) <a href="http://arxiv.org/find/astro-ph/1/au:+Rubin_D/0/1/0/all/0/1">David Rubin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Heitlauf_J/0/1/0/all/0/1">Jessica Heitlauf</a> Type Ia supernovae (SNe Ia) provided the first strong evidence that the expansion of the universe is accelerating. With SN samples now more than ten times larger than those used for the original discovery […]

Detailed Characterization of Low Activity Comet 49P/Arend-Rigaux. (arXiv:1912.02194v1 [astro-ph.EP])

Detailed Characterization of Low Activity Comet 49P/Arend-Rigaux. (arXiv:1912.02194v1 [astro-ph.EP]) <a href="http://arxiv.org/find/astro-ph/1/au:+Chu_L/0/1/0/all/0/1">Laurie E. U. Chu</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Meech_K/0/1/0/all/0/1">Karen J. Meech</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Farnham_T/0/1/0/all/0/1">Tony L. Farnham</a> (2), <a href="http://arxiv.org/find/astro-ph/1/au:+Kuhrt_E/0/1/0/all/0/1">Ekkehard K&#xfc;hrt</a> (3), <a href="http://arxiv.org/find/astro-ph/1/au:+Mottola_S/0/1/0/all/0/1">Stefano Mottola</a> (3), <a href="http://arxiv.org/find/astro-ph/1/au:+Keane_J/0/1/0/all/0/1">Jacqueline V. Keane</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Hellmich_S/0/1/0/all/0/1">Stephan Hellmich</a> (3), <a href="http://arxiv.org/find/astro-ph/1/au:+Hainaut_O/0/1/0/all/0/1">Olivier R. Hainaut</a> (4), <a href="http://arxiv.org/find/astro-ph/1/au:+Kleyna_J/0/1/0/all/0/1">Jan T. Kleyna</a> (1) ((1) Institute for […]

Exploring the outskirts of globular clusters: the peculiar kinematics of NGC 3201. (arXiv:1912.02195v1 [astro-ph.GA])

Exploring the outskirts of globular clusters: the peculiar kinematics of NGC 3201. (arXiv:1912.02195v1 [astro-ph.GA]) <a href="http://arxiv.org/find/astro-ph/1/au:+Bianchini_P/0/1/0/all/0/1">P. Bianchini</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ibata_R/0/1/0/all/0/1">R. Ibata</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Famaey_B/0/1/0/all/0/1">B. Famaey</a> The outskirts of globular clusters (GCs) simultaneously retain crucial information about their formation mechanism and the properties of their host galaxy. Thanks to the advent of precision astrometry both their morphological and […]

Exploiting flux ratio anomalies to probe warm dark matter in future large scale surveys. (arXiv:1912.02196v1 [astro-ph.CO])

Exploiting flux ratio anomalies to probe warm dark matter in future large scale surveys. (arXiv:1912.02196v1 [astro-ph.CO]) <a href="http://arxiv.org/find/astro-ph/1/au:+Harvey_D/0/1/0/all/0/1">David Harvey</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Valkenburg_W/0/1/0/all/0/1">Wessel Valkenburg</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tamone_A/0/1/0/all/0/1">Amelie Tamone</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Boyarsky_A/0/1/0/all/0/1">Alexey Boyarsky</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Courbin_F/0/1/0/all/0/1">Frederic Courbin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lovell_M/0/1/0/all/0/1">Mark Lovell</a> Flux ratio anomalies in strong gravitationally lensed quasars constitute a unique way to probe the abundance of non-luminous dark matter haloes, […]

The dynamical history of the evaporating or disrupted ice giant planet around white dwarf WD J0914+1914. (arXiv:1912.02199v1 [astro-ph.EP])

The dynamical history of the evaporating or disrupted ice giant planet around white dwarf WD J0914+1914. (arXiv:1912.02199v1 [astro-ph.EP]) <a href="http://arxiv.org/find/astro-ph/1/au:+Veras_D/0/1/0/all/0/1">Dimitri Veras</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Fuller_J/0/1/0/all/0/1">Jim Fuller</a> Robust evidence of an ice giant planet shedding its atmosphere around the white dwarf WD J0914+1914 represents a milestone in exoplanetary science, allowing us to finally supplement our knowledge of white […]

Constraining Galactic Structure with the LISA White Dwarf Foreground. (arXiv:1912.02200v1 [astro-ph.GA])

Constraining Galactic Structure with the LISA White Dwarf Foreground. (arXiv:1912.02200v1 [astro-ph.GA]) <a href="http://arxiv.org/find/astro-ph/1/au:+Breivik_K/0/1/0/all/0/1">Katelyn Breivik</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mingarelli_C/0/1/0/all/0/1">Chiara M. F. Mingarelli</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Larson_S/0/1/0/all/0/1">Shane L. Larson</a> White dwarfs comprise 95% of all stellar remnants, and are thus an excellent tracer of old stellar populations in the Milky Way. Current and planned telescopes are not able to directly probe […]

The impact of star formation sampling effects on the spectra of lensed $z>6$ galaxies detectable with $textit{JWST}$. (arXiv:1912.02201v1 [astro-ph.GA])

The impact of star formation sampling effects on the spectra of lensed $z>6$ galaxies detectable with $textit{JWST}$. (arXiv:1912.02201v1 [astro-ph.GA]) <a href="http://arxiv.org/find/astro-ph/1/au:+Vikaeus_A/0/1/0/all/0/1">Anton Vikaeus</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zackrisson_E/0/1/0/all/0/1">Erik Zackrisson</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Binggeli_C/0/1/0/all/0/1">Christian Binggeli</a> The upcoming $textit{James Webb Space Telescope}$ ($textit{JWST}$) will allow observations of high-redshift galaxies at fainter detection levels than ever before, and $textit{JWST}$ surveys targeting gravitationally lensed fields […]

Global 21-cm Signal Extraction from Foreground and Instrumental Effects II: Efficient and Self-Consistent Technique for Constraining Nonlinear Signal Models. (arXiv:1912.02205v1 [astro-ph.CO])

Global 21-cm Signal Extraction from Foreground and Instrumental Effects II: Efficient and Self-Consistent Technique for Constraining Nonlinear Signal Models. (arXiv:1912.02205v1 [astro-ph.CO]) <a href="http://arxiv.org/find/astro-ph/1/au:+Rapetti_D/0/1/0/all/0/1">David Rapetti</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tauscher_K/0/1/0/all/0/1">Keith Tauscher</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mirocha_J/0/1/0/all/0/1">Jordan Mirocha</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Burns_J/0/1/0/all/0/1">Jack O. Burns</a> We present the completion of a data analysis pipeline that self-consistently separates global 21-cm signals from large systematics using a pattern […]

Gas flows in galactic centre environments: cloud evolution and star formation in the Central Molecular Zone. (arXiv:1912.02212v1 [astro-ph.GA])

Gas flows in galactic centre environments: cloud evolution and star formation in the Central Molecular Zone. (arXiv:1912.02212v1 [astro-ph.GA]) <a href="http://arxiv.org/find/astro-ph/1/au:+Petkova_M/0/1/0/all/0/1">Maya A. Petkova</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kruijssen_J/0/1/0/all/0/1">J. M. Diederik Kruijssen</a> The Central Molecular Zone (CMZ) is the most extreme star-forming environment in the Milky Way in terms of gas pressures, densities, temperatures, and dynamics. It acts as a […]

Constraints on the magnetic field within a stratified outer core. (arXiv:1912.02213v1 [physics.geo-ph])

Constraints on the magnetic field within a stratified outer core. (arXiv:1912.02213v1 [physics.geo-ph]) <a href="http://arxiv.org/find/physics/1/au:+Hardy_C/0/1/0/all/0/1">Colin M Hardy</a>, <a href="http://arxiv.org/find/physics/1/au:+Livermore_P/0/1/0/all/0/1">Philip W Livermore</a>, <a href="http://arxiv.org/find/physics/1/au:+Niesen_J/0/1/0/all/0/1">Jitse Niesen</a> Mounting evidence from both seismology and experiments on core composition suggests the existence of a layer of stably stratified fluid at the top of Earth’s outer core. In this work we examine […]

Monte Carlo radiative transfer for the nebular phase of Type Ia supernovae. (arXiv:1912.02214v1 [astro-ph.HE])

Monte Carlo radiative transfer for the nebular phase of Type Ia supernovae. (arXiv:1912.02214v1 [astro-ph.HE]) <a href="http://arxiv.org/find/astro-ph/1/au:+Shingles_L/0/1/0/all/0/1">L. J. Shingles</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sim_S/0/1/0/all/0/1">S. A. Sim</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kromer_M/0/1/0/all/0/1">M. Kromer</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Maguire_K/0/1/0/all/0/1">K. Maguire</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bulla_M/0/1/0/all/0/1">M. Bulla</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Collins_C/0/1/0/all/0/1">C. Collins</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ballance_C/0/1/0/all/0/1">C. P. Ballance</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Michel_A/0/1/0/all/0/1">A. S. Michel</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ramsbottom_C/0/1/0/all/0/1">C. A. Ramsbottom</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Roepke_F/0/1/0/all/0/1">F. K. Roepke</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Seitenzahl_I/0/1/0/all/0/1">I. R. Seitenzahl</a>, <a […]

Neptune-Sized Planet Found Orbiting a Dead White Dwarf Star. Here’s the Crazy Part, the Planet is 4 Times Bigger Than the Star

Neptune-Sized Planet Found Orbiting a Dead White Dwarf Star. Here’s the Crazy Part, the Planet is 4 Times Bigger Than the Star Astronomers have discovered a large Neptune-sized planet orbiting a white dwarf star. The planet is four times bigger than the star, and the white dwarf appears to be slowly destroying the planet: the […]