RAS_WEB (Page 32)

A comparison of effective field theory models of redshift space galaxy power spectra for DESI 2024 and future surveys M. Maus, Y. Lai, H. E. Noriega, S. Ramirez-Solano, A. Aviles, S. Chen, S. Fromenteau, H. Gil-Mar’in, C. Howlett, M. Vargas-Maga~na, M. White, P. Zarrouk, J. Aguilar, S. Ahlen, O. Alves, S. Brieden, D. Brooks, E. Burtin, T. Claybaugh, S. Cole, K. Dawson, M. Icaza-Lizaola, A. de la Macorra, A. de Mattia, P. Doel, S. Ferraro, N. Findlay, J. E. Forero-Romero, E. Gazta~naga, S. Gontcho A Gontcho, C. Hahn, K. Honscheid, M. Ishak, A. Kremin, M. Landriau, L. Le Guillou, M. Manera, R. Miquel, E. Mueller,Read More →

Validating the Galaxy and Quasar Catalog-Level Blinding Scheme for the DESI 2024 analysis U. Andrade, J. Mena-Fern’andez, H. Awan, A. J. Ross, S. Brieden, J. Pan, A. de Mattia, J. Aguilar, S. Ahlen, O. Alves, D. Brooks, E. Buckley-Geer, E. Chaussidon, T. Claybaugh, S. Cole, A. de la Macorra, Arjun Dey, P. Doel, K. Fanning, J. E. Forero-Romero, E. Gazta~naga, H. Gil-Mar’in, S. Gontcho A Gontcho, J. Guy, C. Hahn, M. M. S Hanif, K. Honscheid, C. Howlett, D. Huterer, S. Juneau, A. Kremin, M. Landriau, L. Le Guillou, M. E. Levi, M. Manera, P. Martini, A. Meisner, R. Miquel, J. Moustakas, E. Mueller, A.Read More →

A comparison between Shapefit compression and Full-Modelling method with PyBird for DESI 2024 and beyond Yan Lai, Cullan Howlett, Mark Maus, H’ector Gil-Mar’in, Hernan E. Noriega, Sadi Ram’irez-Solano, Pauline Zarrouk, Jessica N. Aguilar, Steven Ahlen, Ot’avio Alves, Alejandro Aviles, David Brooks, Shi-Fan Chen, Todd Claybaugh, Tamara M. Davis, Kyle Dawson, Axel de la Macorra, Peter Doel, Jaime E. Forero-Romero, Enrique Gazta~naga, Satya Gontcho A Gontcho, Klaus Honscheid, Stephanie Juneau, Martin Landriau, Marc Manera, Ramon Miquel, Eva-Maria Mueller, Seshadri Nadathur, Gustavo Niz, Nathalie Palanque-Delabrouille, Will Percival, Claire Poppett, Mehdi Rezaie, Graziano Rossi, Eusebio Sanchez, Michael Schubnell, David Sprayberry, Gregory Tarl’e, Mariana Vargas-Maga~na, Licia Verde, Sihan Yuan,Read More →

JWST/MIRI detection of suprathermal OH rotational emissions: probing the dissociation of the water by Lyman alpha photons near the protostar HOPS 370 David A. Neufeld, P. Manoj, Himanshu Tyagi, Mayank Narang, Dan M. Watson, S. Thomas Megeath, Ewine F. Van Dishoeck, Robert A. Gutermuth, Thomas Stanke, Yao-Lun Yang, Adam E. Rubinstein, Guillem Anglada, Henrik Beuther, Alessio Caratti o Garatti, Neal J. Evans II, Samuel Federman, William J. Fischer, Joel Green, Pamela Klaassen, Leslie W. Looney, Mayra Osorio, Pooneh Nazari, John J. Tobin, Lukasz Tychoniec, Scott Wolk arXiv:2404.07299v1 Announce Type: new Abstract: Using the MIRI/MRS spectrometer on JWST, we have detected pure rotational, suprathermal OH emissionsRead More →

The Physical Origin of the Stellar Initial Mass Function Patrick Hennebelle, Mike Grud’ic arXiv:2404.07301v1 Announce Type: new Abstract: Stars are amongst the most fundamental structures of our Universe. They comprise most of the baryonic and luminous mass of galaxies, synthethise heavy elements, and injec t mass, momentum, and energy into the interstellar medium. They are also home to the planets. Since stellar properties are primarily decided by their mass, the so-called stellar initial mass function (IMF) is critical to the structuring of our Universe. We review the various physical processes, and theories which have been put forward as well as the numerical simulations which haveRead More →

An analysis of parameter compression and full-modeling techniques with Velocileptors for DESI 2024 and beyond M. Maus, S. Chen, M. White, J. Aguilar, S. Ahlen, A. Aviles, S. Brieden, D. Brooks, T. Claybaugh, S. Cole, A. de la Macorra, Arjun Dey, P. Doel, S. Ferraro, N. Findlay, J. E. Forero-Romero, E. Gazta~naga, H. Gil-Mar’in, S. Gontcho A Gontcho, C. Hahn, K. Honscheid, C. Howlett, M. Ishak, S. Juneau, A. Kremin, Y. Lai, M. Landriau, M. E. Levi, M. Manera, R. Miquel, E. Mueller, A. D. Myers, S. Nadathur, J. Nie, H. E. Noriega, N. Palanque-Delabrouille, W. J. Percival, C. Poppett, S. Ramirez-Solano, M. Rezaie, A.Read More →

Effects of dynamical friction on perturbations for evolving dark energy Francesco Pace, Orlando Luongo, Antonino Del Popolo arXiv:2404.07313v1 Announce Type: new Abstract: We explore the impact of dynamical friction on cosmological scales and show its influence on the evolution of perturbations. In particular, considering smooth and clustering dark energy models, we describe the role played by friction by selecting two main hierarchical models, textit{i.e.}, the first where the friction term is proportional to the Hubble rate, whereas the second where friction is induced by the dark energy pressure. The second approach generalises the first and translates the idea that pressure is a general relativistic effect,Read More →

Closing the stellar labels gap: Stellar label independent evidence for [$alpha$/M] information in $textit{Gaia}$ BP/RP spectra Alexander Laroche, Joshua S. Speagle arXiv:2404.07316v1 Announce Type: new Abstract: Data-driven models for stellar spectra which depend on stellar labels suffer from label systematics which decrease model performance: the “stellar labels gap”. To close the stellar labels gap, we present a stellar label independent model for $textit{Gaia}$ BP/RP (XP) spectra. We develop a novel implementation of a variational auto-encoder; a $textit{scatter}$ VAE, which learns to generate an XP spectrum and intrinsic scatter without relying on stellar labels. We demonstrate that our model achieves competitive XP spectra reconstructions in comparisonRead More →

Cosmological gas accretion history onto the stellar discs of Milky Way-like galaxies in the Auriga simulations — (II) The inside-out growth of discs Federico G. Iza, Sebasti’an E. Nuza, Cecilia Scannapieco, Robert J. J. Grand, Facundo A. G’omez, Volker Springel, R"udiger Pakmor, Federico Marinacci, Francesca Fragkoudi arXiv:2404.07320v1 Announce Type: new Abstract: We investigate the growth of stellar discs in Milky Way-mass galaxies using the magnetohydrodynamical simulations of the Auriga Project in a full cosmological context. We focus on the gas accretion process along the discs, calculating the net, infall and outflow rates as a function of galactocentric distance, and investigate the relation between them andRead More →

Proto-Neutron Star Convection and the Neutrino-Driven Wind: Implications for the $nu$p-Process Brian Nevins, Luke F. Roberts arXiv:2404.07324v1 Announce Type: new Abstract: Recent studies of the neutrino-driven wind from proto-neutron stars have indicated that the wind is likely proton-rich for much of its lifetime, and the high flux of neutrinos can induce $nu$p-process nucleosynthesis allowing for the formation of heavy elements. It has also been shown that gravito-acoustic waves, generated by convection within the proto-neutron star, can significantly alter the dynamics and nucleosynthesis in the wind. Therefore, we present a study of the effects of convection-driven waves on the nucleosynthesis in proton-rich neutrino-driven winds, focusing onRead More →

EUV observables of simulated plasmoid-mediated reconnection in the solar corona {O}. H. F{ae}rder, D. N’obrega-Siverio, M. Carlsson, J. Mart’inez-Sykora arXiv:2404.07327v1 Announce Type: new Abstract: Understanding the role of magnetic reconnection in the heating and dynamics of the solar atmosphere requires detailed observational data of any observable aspect of the reconnection process, including small-scale features such as plasmoids. We aim to examine the capability of active and upcoming instruments to detect plasmoids generated by reconnection in the corona including low-density regimes. We used the Bifrost code to perform simulations of plasmoid-mediated reconnection in the corona based on a 2D idealised setup: a fan-spine topology with uniformRead More →

Primordial Intermediate and Supermassive Black Hole formation during the electron-positron annihilation epoch J. L. G. Sobrinho, P. Augusto arXiv:2404.07332v1 Announce Type: new Abstract: Some of the Intermediate Mass Black Hole (IMBH) candidates observed at the center of galaxies or in globular clusters and some of the Supermassive Black Holes (SMBHs) seen at the center of many galaxies might be of primordial origin. Indeed, Primordial Black Holes (PBHs) of such mass could have formed when the Universe was $sim$1-10$^3$ s old, due to the collapse of density fluctuations. In particular, when the Universe was $sim 1$ s in age, Electron-Positron Annihilation (EPA) took place. We exploreRead More →

Proper motion study of the 6.7 GHz methanol maser rings. I. A sample of sources with little variation A. Bartkiewicz, A. Sanna, M. Szymczak, L. Moscadelli, H. J. van Langevelde, P. Wolak, A. Kobak, M. Durjasz arXiv:2404.07333v1 Announce Type: new Abstract: Methanol masers at 6.7~GHz are well-known signposts of high-mass star-forming regions. […] We aim to understand the origin of the ring-like structures outlined by methanol maser emission in a number of sources. This emission could be, a priori, spatially associated with an outflow and/or disc around a high-mass protostar. […] Using sensitive, three-epoch observations spanning over eight years with the European VLBI Network, weRead More →

Doomed Worlds I: No new evidence for orbital decay in a long-term survey of 43 ultra-hot Jupiters Elisabeth R. Adams, Brian Jackson, Amanda A. Sickafoose, Jeffrey P. Morgenthaler, Hannah Worters, Hailey Stubbers, Dallon Carson, Sakhee Bhure, Stijn Dekeyser, Chelsea Huang, Nevin N. Weinberg arXiv:2404.07339v1 Announce Type: new Abstract: Ultra-hot Jupiters are likely doomed by tidal forces to undergo orbital decay and eventual disruption by their stars, but the timescale over which this process unfolds is unknown. We present results from a long-term project to monitor ultra-hot Jupiters transits. We recovered WASP-12 b’s orbital decay rate of dP/dt = -29.8 +/- 1.6 ms yr-1, in agreementRead More →

Monitoring AGNs with H$beta$ Asymmetry. IV. First Reverberation Mapping Results of 14 AGNs T. E. Zastrocky, Michael S. Brotherton, Pu Du, Jacob N. McLane, Kianna A. Olson, D. A. Dale, H. A. Kobulnicky, Jaya Maithil, My L. Nguyen, William T. Chick, David H. Kasper, Derek Hand, C. Adelman, Z. Carter, G. Murphree, M. Oeur, T. Roth, S. Schonsberg, M. J. Caradonna, J. Favro, A. J. Ferguson, I. M. Gonzalez, L. M. Hadding, H. D. Hagler, C. J. Rogers, T. R. Stack, Franklin Chapman, Dong-Wei Bao, Feng-Na Fang, Shuo Zhai, Sen Yang, Yong-Jie Chen, Hua-Rui Bai, Yi-Xin Fu, Jun-Rong Liu, Zhu-Heng Yao, Yue-Chang Peng, Yu-Yang Songsheng,Read More →

Recovering the gas properties of protoplanetary disks through parametric visibility modeling: MHO 6 Nicolas T. Kurtovic, Paola Pinilla arXiv:2404.07349v1 Announce Type: new Abstract: The composition and distribution of the gas in a protoplanetary disk plays a key role in shaping the outcome of the planet formation process. Observationally, the recovery of information such as the emission height and brightness temperature from interferometric data is often limited by the imaging processes. To overcome the limitations of image-reconstruction when analyzing gas emission from interferometric observations, we have introduced a parametric model to fit the main observable properties of the gaseous disk component in the visibility plane. ThisRead More →

Resolved UV and optical color gradients reveal environmental influence on galaxy evolution at redshift z$sim$1.6 William J. Cramer, A. G. Noble, G. Rudnick, A. Pigarelli, G. Wilson, Y. M. Bah’e, M. C. Cooper, R. Demarco, J. Matharu, T. B. Miller, A. Muzzin, J. Nantais, W. Sportsman, E. van Kampen, T. M. A. Webb, H. K. C. Yee arXiv:2404.07355v1 Announce Type: new Abstract: The changes in colors across a galaxy are intimately connected to the galaxy’s formation, growth, quenching history, and dust content. A particularly important epoch in the growth of galaxies is near $z sim 2$ often referred to as ‘cosmic noon’, where galaxies onRead More →

ALMA-IMF XV: N$_2$H$^+$ kinematic analysis on the intermediate protocluster G353.41 R. H. ‘Alvarez-Guti’errez, A. M. Stutz, N. Sandoval-Garrido, F. Louvet, F. Motte, R. Galv’an-Madrid, N. Cunningham, P. Sanhueza, M. Bonfand, S. Bontemps, A. Gusdorf, T. Csengeri, S. D. Reyes, J. Salinas, T. Baug, L. Bronfman, G. Busquet, D. J. D’iaz-Gonz’alez, M. Fernandez-Lopez, A. Guzm’an, A. Koley, H. -L. Liu, F. A. Olguin, M. Valeille-Manet, F. Wyrowski arXiv:2404.07363v1 Announce Type: new Abstract: The ALMA-IMF Large Program provides multi-tracer observations of 15 Galactic massive protoclusters at matched sensitivity and spatial resolution. We focus on the dense gas kinematics of the G353.41 protocluster traced by N$_2$H$^+$ (1$-$0), withRead More →

BeyonCE — Light Curve Modelling Beyond Circular Eclipsers I. Shallot Explorer Dirk van Dam, Matthew Kenworthy arXiv:2404.07378v1 Announce Type: new Abstract: Context. Time-series photometry has given astronomers the tools to study time-dependent astrophysical phenomena, from stellar activity to fast radio bursts and exoplanet transits. Transit events in particular are focused primarily on planetary transits, and eclipsing binaries with eclipse geometries that are parameterised with a few variables, while more complex light curves caused by substructure within the transiting object require customized analysis code. Aims. We present Beyond Circular Eclipsers (BeyonCE), which reduces the parameter space encompassed by the transit of circum-secondary disc (CSD) systems withRead More →

The GALEX-Gaia-EDR3 Catalogue of Single and Binary White Dwarfs Ryan Jackim (Department of Physics and Astronomy, University of British Columbia), Jeremy Heyl (Department of Physics and Astronomy, University of British Columbia), Harvey Richer (Department of Physics and Astronomy, University of British Columbia) arXiv:2404.07388v1 Announce Type: new Abstract: We present a catalogue of white dwarf candidates constructed from the GALEX and Gaia EDR3 catalogues. The catalogue contains 332,111 candidate binary white dwarf systems and 111,996 candidate single white dwarfs. Where available, the catalogue is augmented with photometry from Pan-STARRS DR1, SDSS DR12 and classifications from StarHorse. We fit photometric data with modeled white dwarf cooling sequencesRead More →