RAS_WEB (Page 2,754)

The Atacama Cosmology Telescope: A Measurement of the Cosmic Microwave Background Power Spectra at 98 and 150 GHz. (arXiv:2007.07289v1 [astro-ph.CO]) <a href="http://arxiv.org/find/astro-ph/1/au:+Choi_S/0/1/0/all/0/1">Steve K. Choi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hasselfield_M/0/1/0/all/0/1">Matthew Hasselfield</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ho_S/0/1/0/all/0/1">Shuay-Pwu Patty Ho</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Koopman_B/0/1/0/all/0/1">Brian Koopman</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lungu_M/0/1/0/all/0/1">Marius Lungu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Abitbol_M/0/1/0/all/0/1">Maximilian H. Abitbol</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Addison_G/0/1/0/all/0/1">Graeme E. Addison</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ade_P/0/1/0/all/0/1">Peter A. R. Ade</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Aiola_S/0/1/0/all/0/1">Simone Aiola</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Alonso_D/0/1/0/all/0/1">David Alonso</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Amiri_M/0/1/0/all/0/1">Mandana Amiri</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Amodeo_S/0/1/0/all/0/1">Stefania Amodeo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Angile_E/0/1/0/all/0/1">Elio Angile</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Austermann_J/0/1/0/all/0/1">Jason E. Austermann</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Baildon_T/0/1/0/all/0/1">Taylor Baildon</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Battaglia_N/0/1/0/all/0/1">Nick Battaglia</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Beall_J/0/1/0/all/0/1">James A. Beall</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bean_R/0/1/0/all/0/1">Rachel Bean</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Becker_D/0/1/0/all/0/1">Daniel T. Becker</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bond_J/0/1/0/all/0/1">J Richard Bond</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bruno_S/0/1/0/all/0/1">Sarah Marie Bruno</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Calabrese_E/0/1/0/all/0/1">Erminia Calabrese</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Calafut_V/0/1/0/all/0/1">Victoria Calafut</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Campusano_L/0/1/0/all/0/1">Luis E. Campusano</a>, <aRead More →

The Atacama Cosmology Telescope: arcminute-resolution maps of 18,000 square degrees of the microwave sky from ACT 2008-2018 data combined with Planck. (arXiv:2007.07290v1 [astro-ph.IM]) <a href="http://arxiv.org/find/astro-ph/1/au:+Naess_S/0/1/0/all/0/1">Sigurd Naess</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Aiola_S/0/1/0/all/0/1">Simone Aiola</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Austermann_J/0/1/0/all/0/1">Jason E. Austermann</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Battaglia_N/0/1/0/all/0/1">Nick Battaglia</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Beall_J/0/1/0/all/0/1">James A. Beall</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Becker_D/0/1/0/all/0/1">Daniel T. Becker</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bond_R/0/1/0/all/0/1">Richard J. Bond</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Calabrese_E/0/1/0/all/0/1">Erminia Calabrese</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Choi_S/0/1/0/all/0/1">Steve K. Choi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Cothard_N/0/1/0/all/0/1">Nicholas F. Cothard</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Crowley_K/0/1/0/all/0/1">Kevin T. Crowley</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Darwish_O/0/1/0/all/0/1">Omar Darwish</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Datta_R/0/1/0/all/0/1">Rahul Datta</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Denison_E/0/1/0/all/0/1">Edward V. Denison</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Devlin_M/0/1/0/all/0/1">Mark Devlin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Duell_C/0/1/0/all/0/1">Cody J. Duell</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Duff_S/0/1/0/all/0/1">Shannon M. Duff</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Duivenvoorden_A/0/1/0/all/0/1">Adriaan J. Duivenvoorden</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dunkley_J/0/1/0/all/0/1">Jo Dunkley</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dunner_R/0/1/0/all/0/1">Rolando D&#xfc;nner</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Fox_A/0/1/0/all/0/1">Anna E. Fox</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gallardo_P/0/1/0/all/0/1">Patricio A. Gallardo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Halpern_M/0/1/0/all/0/1">Mark Halpern</a>,Read More →

A simple, heuristic derivation of the Balescu-Lenard kinetic equation for stellar systems. (arXiv:2007.07291v1 [astro-ph.GA]) <a href="http://arxiv.org/find/astro-ph/1/au:+Hamilton_C/0/1/0/all/0/1">Chris Hamilton</a> (DAMTP, Cambridge) The unshielded nature of gravity means that stellar systems are inherently inhomogeneous. As a result, stars do not move in straight lines. This obvious fact severely complicates the kinetic theory of stellar systems because position and velocity turn out to be poor coordinates with which to describe stellar orbits – instead, one must use angle-action variables. Moreover, the slow relaxation of star clusters and galaxies can be enhanced or suppressed by collective interactions (‘polarisation’ effects) involving many stars simultaneously. These collective effects are also present inRead More →

Inverse energy transfer in decaying, three dimensional, nonhelical magnetic turbulence due to magnetic reconnection. (arXiv:2007.07325v1 [astro-ph.CO]) <a href="http://arxiv.org/find/astro-ph/1/au:+Bhat_P/0/1/0/all/0/1">Pallavi Bhat</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhou_M/0/1/0/all/0/1">Muni Zhou</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Loureiro_N/0/1/0/all/0/1">Nuno F. Loureiro</a> It has been recently shown numerically that there exists an inverse transfer of magnetic energy in decaying, nonhelical, magnetically dominated, magnetohydrodynamic turbulence in 3-dimensions (3D). We suggest that magnetic reconnection is the underlying physical mechanism responsible for this inverse transfer. In the two-dimensional (2D) case, the inverse transfer is easily inferred to be due to smaller magnetic islands merging to form larger ones via reconnection. We find that the scaling behaviour is similar between the 2D and the 3DRead More →

Ground Calibration of Solar X-ray Monitor On-board Chandrayaan-2 Orbiter. (arXiv:2007.07326v1 [astro-ph.IM]) <a href="http://arxiv.org/find/astro-ph/1/au:+Mithun_N/0/1/0/all/0/1">N. P. S. Mithun</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Vadawale_S/0/1/0/all/0/1">Santosh V. Vadawale</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Shanmugam_M/0/1/0/all/0/1">M. Shanmugam</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Patel_A/0/1/0/all/0/1">Arpit R. Patel</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tiwari_N/0/1/0/all/0/1">Neeraj Kumar Tiwari</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Adalja_H/0/1/0/all/0/1">Hiteshkumar L. Adalja</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Goyal_S/0/1/0/all/0/1">Shiv Kumar Goyal</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ladiya_T/0/1/0/all/0/1">Tinkal Ladiya</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Singh_N/0/1/0/all/0/1">Nishant Singh</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kumar_S/0/1/0/all/0/1">Sushil Kumar</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tiwari_M/0/1/0/all/0/1">Manoj K. Tiwari</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Modi_M/0/1/0/all/0/1">M. H. Modi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mondal_B/0/1/0/all/0/1">Biswajit Mondal</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sarkar_A/0/1/0/all/0/1">Aveek Sarkar</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Joshi_B/0/1/0/all/0/1">Bhuwan Joshi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Janardhan_P/0/1/0/all/0/1">P. Janardhan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bhardwaj_A/0/1/0/all/0/1">Anil Bhardwaj</a> Chandrayaan-2, the second Indian mission to the Moon, carries a spectrometer called the Solar X-ray Monitor (XSM) to perform soft X-ray spectral measurements of the Sun while a companion payload measures the fluorescence emissionRead More →

Main Belt Asteroid Science in the Decade 2023-2032: Fundamental Science Questions and Recommendations on behalf of the Small Bodies Assessment Group. (arXiv:2007.07359v1 [astro-ph.IM]) <a href="http://arxiv.org/find/astro-ph/1/au:+McAdam_M/0/1/0/all/0/1">Maggie M. McAdam</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Rivkin_A/0/1/0/all/0/1">Andrew S. Rivkin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lim_L/0/1/0/all/0/1">Lucy F. Lim</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Castillo_Rogez_J/0/1/0/all/0/1">Julie Castillo-Rogez</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Marchis_F/0/1/0/all/0/1">Franck Marchis</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Becker_T/0/1/0/all/0/1">Tracy M. Becker</a> Solicited by the Small Bodies Assessment Group, we recommend a balanced program of telescopic observation (ground-based, airborne, and space-based), laboratory studies, theoretical research and missions to Main Belt Asteroids utilizing the full spectral range from ultraviolet to far-infrared to investigate these outstanding fundamental questions in the next decade. Solicited by the Small Bodies Assessment Group, we recommend a balanced programRead More →

GJ 3470 c: A Saturn-like Exoplanet Candidate in the Habitable Zone of GJ 3470. (arXiv:2007.07373v1 [astro-ph.EP]) <a href="http://arxiv.org/find/astro-ph/1/au:+Scott_P/0/1/0/all/0/1">Phillip Scott</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Walter_B/0/1/0/all/0/1">Bradley Walter</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ye_Q/0/1/0/all/0/1">Quanzhi Ye</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mitchell_D/0/1/0/all/0/1">David Mitchell</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Heiland_L/0/1/0/all/0/1">Leo Heiland</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gao_X/0/1/0/all/0/1">Xing Gao</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Palado_A/0/1/0/all/0/1">Alejandro Palado</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Otabek_B/0/1/0/all/0/1">Burkhonov Otabek</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Casal_J/0/1/0/all/0/1">Jesus Delgado Casal</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hill_C/0/1/0/all/0/1">Colin Hill</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Garcia_A/0/1/0/all/0/1">Alberto Garcia</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Alton_K/0/1/0/all/0/1">Kevin B. Alton</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ogmen_Y/0/1/0/all/0/1">Yenal Ogmen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Agnihotri_V/0/1/0/all/0/1">Vikrant Kumar Agnihotri</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Caballero_A/0/1/0/all/0/1">Alberto Caballero</a> We report the discovery of a new exoplanet candidate orbiting the star GJ 3470. A total of three transits were detected by OKSky Observatory: the first one on December 23, 2019, the second one on February 27, 2020, and the thirdRead More →

The nuclear architecture of NGC 4151: on the path toward a universal outflow mechanism in light of NGC 1068. (arXiv:2007.07374v1 [astro-ph.GA]) <a href="http://arxiv.org/find/astro-ph/1/au:+May_D/0/1/0/all/0/1">D. May</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Steiner_J/0/1/0/all/0/1">J. E. Steiner</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Menezes_R/0/1/0/all/0/1">R. B. Menezes</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Williams_D/0/1/0/all/0/1">D. R. A. Williams</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wang_J/0/1/0/all/0/1">J. Wang</a> We report near-infrared integral field spectroscopic observations of the active galactic nucleus NGC 4151 with archive data from the NIFS-Gemini North Telescope. We have selected best-seeing observations ($lesssim$0.3 arcsec) that, allied to our methodology of image processing techniques, show structures with spatial resolution comparable to those of the HST. The intricate outflow of NGC 4151 is revisited in light of the results found for NGCRead More →