RAS_WEB (Page 2,434)

An Automated Pipeline for the VST Data Log Analysis. (arXiv:2012.15597v2 [astro-ph.IM] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Savarese_S/0/1/0/all/0/1">Salvatore Savarese</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Schipani_P/0/1/0/all/0/1">Pietro Schipani</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Capasso_G/0/1/0/all/0/1">Giulio Capasso</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Colapietro_M/0/1/0/all/0/1">Mirko Colapietro</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+DOrsi_S/0/1/0/all/0/1">Sergio D&#x27;Orsi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Marty_L/0/1/0/all/0/1">Laurent Marty</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Perrotta_F/0/1/0/all/0/1">Francesco Perrotta</a> The VST Telescope Control Software logs continuously detailed information about the telescope and instrument operations. Commands, telemetries, errors, weather conditions and anything may be relevant for the instrument maintenance and the identification of problem sources is regularly saved. All information are recorded in textual form. These log files are often examined individually by the observatory personnel for specific issues and for tackling problems raised during the night. Thus, only a minimal partRead More →

The Konus-Wind catalog of gamma-ray bursts with known redshifts. II. Waiting mode bursts simultaneously detected by Swift/BAT. (arXiv:2012.14849v2 [astro-ph.HE] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Tsvetkova_A/0/1/0/all/0/1">A. Tsvetkova</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Frederiks_D/0/1/0/all/0/1">D. Frederiks</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Svinkin_D/0/1/0/all/0/1">D. Svinkin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Aptekar_R/0/1/0/all/0/1">R. Aptekar</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Cline_T/0/1/0/all/0/1">T. L. Cline</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Golenetskii_S/0/1/0/all/0/1">S. Golenetskii</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hurley_K/0/1/0/all/0/1">K. Hurley</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lysenko_A/0/1/0/all/0/1">A. Lysenko</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ridnaia_A/0/1/0/all/0/1">A. Ridnaia</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ulanov_M/0/1/0/all/0/1">M. Ulanov</a> In the Second part of The Konus-Wind Catalog of Gamma-Ray Bursts with Known Redshifts (first part: Tsvetkova et al. 2017; T17), we present the results of a systematic study of gamma-ray bursts (GRBs) with reliable redshift estimates detected simultaneously by the Konus-Wind (KW) experiment (in the waiting mode) and by the Swift/BAT (BAT) telescopeRead More →

MUSCLE-UPS: Improved Approximations of the Matter Field with the Extended Press-Schechter Formalism and Lagrangian Perturbation Theory. (arXiv:2012.14446v2 [astro-ph.CO] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Tosone_F/0/1/0/all/0/1">Federico Tosone</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Neyrinck_M/0/1/0/all/0/1">Mark C. Neyrinck</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Granett_B/0/1/0/all/0/1">Benjamin R. Granett</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Guzzo_L/0/1/0/all/0/1">Luigi Guzzo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Vittorio_N/0/1/0/all/0/1">Nicola Vittorio</a> Lagrangian algorithms to simulate the evolution of cold dark matter (CDM) are invaluable tools to generate large suites of mock halo catalogues. However, their precision may not be up to the challenge of upcoming surveys. In this paper, we first show that the main limitation of current schemes is their inability to model the evolution of overdensities in the initial density field, a limit that can be circumvented byRead More →

Application of Regge-theory to astronomical objects. (arXiv:2012.14276v3 [physics.class-ph] UPDATED) <a href="http://arxiv.org/find/physics/1/au:+Adamian_G/0/1/0/all/0/1">G. G. Adamian</a>, <a href="http://arxiv.org/find/physics/1/au:+Antonenko_N/0/1/0/all/0/1">N. V. Antonenko</a>, <a href="http://arxiv.org/find/physics/1/au:+Lenske_H/0/1/0/all/0/1">H. Lenske</a>, <a href="http://arxiv.org/find/physics/1/au:+Sargsyan_V/0/1/0/all/0/1">V. V. Sargsyan</a> Using the model based on the Regge-like laws, new analytical formulas are obtained for the moment of inertia and the radius of astronomical non-exotic objects (planets, stars, galaxies, and clusters of galaxies). The rotation frequency and moment of inertia of neutron star and the observable Universe are estimated. The Darwin instability effect in the binary systems (di-planets, di-stars, and di-galaxies) is also analyzed. Using the model based on the Regge-like laws, new analytical formulas are obtained for the moment of inertiaRead More →

A $w$ phantom transition at $z_tRead More →

Host star metallicity of directly imaged wide-orbit planets: implications for planet formation. (arXiv:2012.13694v2 [astro-ph.EP] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Swastik_C/0/1/0/all/0/1">C.Swastik</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Banyal_R/0/1/0/all/0/1">Ravinder K. Banyal</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Narang_M/0/1/0/all/0/1">Mayank Narang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Manoj_P/0/1/0/all/0/1">P. Manoj</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sivarani_T/0/1/0/all/0/1">T. Sivarani</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Reddy_B/0/1/0/all/0/1">Bacham E. Reddy</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Rajaguru_S/0/1/0/all/0/1">S. P. Rajaguru</a> Directly imaged planets are self-luminous companions of pre-main sequence and young main sequence stars. They reside in wider orbits ($sim10mathrm{s}-1000mathrm{s}$~AU) and generally are more massive compared to the close-in ($lesssim 10$~AU) planets. Determining the host star properties of these outstretched planetary systems is important to understand and discern various planet formation and evolution scenarios. We present the stellar parameters and metallicity ([Fe/H]) for a subsample of 18Read More →

Rapid Deceleration of Blast Waves Witnessed in Tycho’s Supernova Remnant. (arXiv:2012.13622v2 [astro-ph.HE] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Tanaka_T/0/1/0/all/0/1">Takaaki Tanaka</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Okuno_T/0/1/0/all/0/1">Tomoyuki Okuno</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Uchida_H/0/1/0/all/0/1">Hiroyuki Uchida</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yamaguchi_H/0/1/0/all/0/1">Hiroya Yamaguchi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lee_S/0/1/0/all/0/1">Shiu-Hang Lee</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Maeda_K/0/1/0/all/0/1">Keiichi Maeda</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Williams_B/0/1/0/all/0/1">Brian J. Williams</a> In spite of their importance as standard candles in cosmology and as major major sites of nucleosynthesis in the Universe, what kinds of progenitor systems lead to type Ia supernovae (SN) remains a subject of considerable debate in the literature. This is true even for the case of Tycho’s SN exploded in 1572 although it has been deeply studied both observationally and theoretically. Analyzing X-ray data of Tycho’s supernova remnantRead More →

The colors of bulges and disks in the core and outskirts of galaxy clusters. (arXiv:2012.12480v2 [astro-ph.GA] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Barsanti_S/0/1/0/all/0/1">S. Barsanti</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Owers_M/0/1/0/all/0/1">M. S. Owers</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+McDermid_R/0/1/0/all/0/1">R. M. McDermid</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bekki_K/0/1/0/all/0/1">K. Bekki</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bryant_J/0/1/0/all/0/1">J. J. Bryant</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Croom_S/0/1/0/all/0/1">S. M. Croom</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Oh_S/0/1/0/all/0/1">S. Oh</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Robotham_A/0/1/0/all/0/1">A. S. G. Robotham</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Scott_N/0/1/0/all/0/1">N. Scott</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sande_J/0/1/0/all/0/1">J. van de Sande</a> The role of the environment on the formation of S0 galaxies is still not well understood, specifically in the outskirts of galaxy clusters. We study eight low-redshift clusters, analyzing galaxy members up to cluster-centric distances $sim2.5,R_{200}$. We perform 2D photometric bulge-disk decomposition in the $g$-, $r$- and $i$-bands from whichRead More →

Remarks on an extended $R^2$ model. (arXiv:2012.10889v2 [gr-qc] UPDATED) <a href="http://arxiv.org/find/gr-qc/1/au:+Ghalee_A/0/1/0/all/0/1">Amir Ghalee</a> Observation of the cosmic microwave background is consistent with the $R^2$ model. In the $R^2$ model, there exists a dimensionless constant which must be assigned a very large value to reconcile the model with the data. We show that the large value for this parameter can be used to propose an extended model. The scalar spectral index and the tensor-to-scalar ratio of the extended model have been obtained. Also, we obtain the three-point correlation function of the curvature perturbation to estimate the primordial non-Gaussianities of the extended model. It has been shown thatRead More →

Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM. (arXiv:2012.08534v2 [astro-ph.CO] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Riess_A/0/1/0/all/0/1">Adam G. Riess</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Casertano_S/0/1/0/all/0/1">Stefano Casertano</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yuan_W/0/1/0/all/0/1">Wenlong Yuan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bowers_J/0/1/0/all/0/1">J. Bradley Bowers</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Macri_L/0/1/0/all/0/1">Lucas Macri</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zinn_J/0/1/0/all/0/1">Joel C. Zinn</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Scolnic_D/0/1/0/all/0/1">Dan Scolnic</a> We present an expanded sample of 75 Milky Way Cepheids with Hubble Space Telescope (HST) photometry and Gaia EDR3 parallaxes which we use to recalibrate the extragalactic distance ladder and refine the determination of the Hubble constant. All HST observations were obtained with the same instrument (WFC3) and filters (F555W, F814W, F160W) used forRead More →

Detection of volatiles sublimating from 67P/Churyumov-Gerasimenko coma particles using ROSINA/COPS. Part I. ram gauge. (arXiv:2012.01495v2 [astro-ph.EP] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Pestoni_B/0/1/0/all/0/1">Boris Pestoni</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Altwegg_K/0/1/0/all/0/1">Kathrin Altwegg</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Balsiger_H/0/1/0/all/0/1">Hans Balsiger</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hanni_N/0/1/0/all/0/1">Nora H&#xe4;nni</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Rubin_M/0/1/0/all/0/1">Martin Rubin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Schroeder_I/0/1/0/all/0/1">Isaac Schroeder</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Schuhmann_M/0/1/0/all/0/1">Markus Schuhmann</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wampfler_S/0/1/0/all/0/1">Susanne Wampfler</a> The ESA Rosetta mission has allowed an extensive in-situ study of comet 67P/Churyumov-Gerasimenko. In measurements performed by the ram gauge of the on-board COmet Pressure Sensor (COPS), features have been observed that deviate from the nominal ram gauge signal. These are attributable to the sublimation of the volatile fraction of cometary icy particles containing volatiles and refractories. The objective of this work is theRead More →

In-flight performance of the BLAST-TNG telescope platform. (arXiv:2012.01039v3 [astro-ph.IM] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Coppi_G/0/1/0/all/0/1">Gabriele Coppi</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:+Ashton_P/0/1/0/all/0/1">Peter C. Ashton</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:+Cox_E/0/1/0/all/0/1">Erin G. Cox</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Devlin_M/0/1/0/all/0/1">Mark J. Devlin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dober_B/0/1/0/all/0/1">Bradley J. Dober</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Fanfani_V/0/1/0/all/0/1">Valentina Fanfani</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Fissel_L/0/1/0/all/0/1">Laura M. Fissel</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Galitzki_N/0/1/0/all/0/1">Nicholas Galitzki</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gao_J/0/1/0/all/0/1">Jiansong Gao</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gordon_S/0/1/0/all/0/1">Samuel Gordon</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Groppi_C/0/1/0/all/0/1">Christopher E. Groppi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hilton_G/0/1/0/all/0/1">Gene C. Hilton</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hubmayr_J/0/1/0/all/0/1">Johannes Hubmayr</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Klein_J/0/1/0/all/0/1">Jeffrey Klein</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Li_D/0/1/0/all/0/1">Dale Li</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lourie_N/0/1/0/all/0/1">Nathan P. Lourie</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lowe_I/0/1/0/all/0/1">Ian Lowe</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mani_H/0/1/0/all/0/1">Hamdi Mani</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mauskopf_P/0/1/0/all/0/1">Philip Mauskopf</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+McKenney_C/0/1/0/all/0/1">Christopher McKenney</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nati_F/0/1/0/all/0/1">Federico Nati</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Novak_G/0/1/0/all/0/1">Giles Novak</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pisano_G/0/1/0/all/0/1">Giampaolo Pisano</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Romualdez_L/0/1/0/all/0/1">L.Javier Romualdez</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sinclair_A/0/1/0/all/0/1">Adrian Sinclair</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Soler_J/0/1/0/all/0/1">Juan D. Soler</a>,Read More →

Extreme mass-ratio gravitational-wave sources: Mass segregation and post binary tidal-disruption captures. (arXiv:2011.13952v2 [astro-ph.GA] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Raveh_Y/0/1/0/all/0/1">Yael Raveh</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Perets_H/0/1/0/all/0/1">Hagai B. Perets</a> The gravitational-wave (GW) inspirals of stellar-mass compact objects onto a supermassive black hole (MBH), are some of the most promising GW sources detectable by next-generation space-born GW-detectors. The rates and characteristics of such extreme mass ratio inspirals (EMRIs) sources are highly uncertain. They are determined by the dynamics of stars near MBHs, and the rate at which compacts objects are driven to the close proximity of the MBH. Here we consider weakly and strongly mass-segregated nuclear clusters, and the evolution of stars captured intoRead More →

Quadruply-imaged quasars: some general features. (arXiv:2011.13142v2 [astro-ph.GA] UPDATED) <a href="http://arxiv.org/find/astro-ph/1/au:+Tuan_Anh_P/0/1/0/all/0/1">P. Tuan-Anh</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Thai_T/0/1/0/all/0/1">T.T. Thai</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tuan_N/0/1/0/all/0/1">N.A. Tuan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Darriulat_P/0/1/0/all/0/1">P. Darriulat</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Diep_P/0/1/0/all/0/1">P.N. Diep</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hoai_D/0/1/0/all/0/1">D.T. Hoai</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ngoc_N/0/1/0/all/0/1">N.B. Ngoc</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nhung_P/0/1/0/all/0/1">P.T. Nhung</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Phuong_N/0/1/0/all/0/1">N.T. Phuong</a> Gravitational lensing of point sources located inside the lens caustic is known to produce four images in a configuration closely related to the source position. We study this relation in the particular case of a sample of quadruply-imaged quasars observed by the Hubble Space Telescope (HST). Strong correlations between the parameters defining the image configuration are revealed. The relation between the image configuration and the source position is studied. SomeRead More →