The radio detection and accretion properties of the peculiar nuclear transient AT 2019avd

Kavli Affiliate: Dheeraj R. Pasham | First 5 Authors: Yanan Wang, Ranieri D. Baldi, Santiago del Palacio, Muryel Guolo, Xiaolong Yang | Summary: AT 2019avd is a nuclear transient detected from infrared to soft X-rays, though its nature is yet unclear. The source has shown two consecutive flaring episodes in the optical and the infrared […]


Continue.. The radio detection and accretion properties of the peculiar nuclear transient AT 2019avd

Unequal-mass boson-star binaries: Initial data and merger dynamics

Kavli Affiliate: Ulrich Sperhake | First 5 Authors: Tamara Evstafyeva, Ulrich Sperhake, Thomas Helfer, Robin Croft, Miren Radia | Summary: We present a generalization of the curative initial data construction derived for equal-mass compact binaries in Helfer {it et al} (2019 Phys. Rev. D 99 044046; 2022 Class. Quantum Grav. 39 074001) to arbitrary mass […]


Continue.. Unequal-mass boson-star binaries: Initial data and merger dynamics

Target Selection and Sample Characterization for the DESI LOW-Z Secondary Target Program

Kavli Affiliate: Risa H. Wechsler | First 5 Authors: Elise Darragh-Ford, John F. Wu, Yao-Yuan Mao, Risa H. Wechsler, Marla Geha | Summary: We introduce the DESI LOW-Z Secondary Target Survey, which combines the wide-area capabilities of the Dark Energy Spectroscopic Instrument (DESI) with an efficient, low-redshift target selection method. Our selection consists of a […]


Continue.. Target Selection and Sample Characterization for the DESI LOW-Z Secondary Target Program

A Multiwavelength study of the ongoing Changing-look AGN AT2021fxu

Kavli Affiliate: Dheeraj Pasham | First 5 Authors: Yukta Ajay, Muryel Guolo, Dheeraj Pasham, , | Summary: We present multiwavelength analyses of an active optical transient AT2021fxu which shows the appearance of previously absent broad emission lines in a recent optical spectrum, suggesting a Changing-look (CL) Active Galactic Nucleus (AGN). During the spectral transition, the […]


Continue.. A Multiwavelength study of the ongoing Changing-look AGN AT2021fxu

Cosmic Reionization On Computers: Statistics, Physical Properties and Environment of Lyman Limit Systems at $zsim6$

Kavli Affiliate: Nickolay Y. Gnedin | First 5 Authors: Jiawen Fan, Hanjue Zhu, Camille Avestruz, Nickolay Y. Gnedin, | Summary: Lyman Limit Systems (LLSs) are dense hydrogen clouds with high enough HI column densities ($N_{rm HI}$) to absorb Lyman continuum photons emitted from distant quasars. Their high column densities imply an origin in dense environments; […]


Continue.. Cosmic Reionization On Computers: Statistics, Physical Properties and Environment of Lyman Limit Systems at $zsim6$

Cosmic Reionization On Computers: Statistics, Physical Properties and Environment of Lyman Limit Systems at $zsim6$

Kavli Affiliate: Nickolay Y. Gnedin | First 5 Authors: Jiawen Fan, Hanjue Zhu, Camille Avestruz, Nickolay Y. Gnedin, | Summary: Lyman Limit Systems (LLSs) are dense hydrogen clouds with high enough HI column densities ($N_{rm HI}$) to absorb Lyman continuum photons emitted from distant quasars. Their high column densities imply an origin in dense environments; […]


Continue.. Cosmic Reionization On Computers: Statistics, Physical Properties and Environment of Lyman Limit Systems at $zsim6$

Cosmic Reionization On Computers: Statistics, Physical Properties and Environment of Lyman Limit Systems at $zsim6$

Kavli Affiliate: Nickolay Y. Gnedin | First 5 Authors: Jiawen Fan, Hanjue Zhu, Camille Avestruz, Nickolay Y. Gnedin, | Summary: Lyman limit systems (LLSs) are dense hydrogen clouds with high enough HI column densities to absorb Lyman continuum photons emitted from distant quasars. Their high column densities imply an origin in dense environments; however, the […]


Continue.. Cosmic Reionization On Computers: Statistics, Physical Properties and Environment of Lyman Limit Systems at $zsim6$

COOL-LAMPS IV: A Sample of Bright Strongly-Lensed Galaxies at $3 < z < 4$

Kavli Affiliate: Michael D. Gladders | First 5 Authors: Yunchong Zhang, Viraj Manwadkar, Michael D. Gladders, Gourav Khullar, HÃ¥kon Dahle | Summary: We report the discovery of five bright strong gravitationally lensed galaxies at $3 < z < 4$: COOLJ0101$+$2055 ($z = 3.459$), COOLJ0104$-$0757 ($z = 3.480$), COOLJ0145$+$1018 ($z = 3.310$), COOLJ0516$-$2208 ($z = 3.549$), […]


Continue.. COOL-LAMPS IV: A Sample of Bright Strongly-Lensed Galaxies at $3 < z < 4$

Novel Conservative Methods for Adaptive Force Softening in Collisionless and Multi-Species N-Body Simulations

Philip F. Hopkins, Ethan O. Nadler, Michael Y. Grudic, Xuejian Shen, Isabel Sands | Summary: [[{“value”:”Modeling self-gravity of collisionless fluids (e.g. ensembles of dark matter, stars, black holes, dust, planetary bodies) in simulations is challenging and requires some force softening. It is often desirable to allow softenings to evolve adaptively, in any high-dynamic range simulation, […]


Continue.. Novel Conservative Methods for Adaptive Force Softening in Collisionless and Multi-Species N-Body Simulations

Novel Conservative Methods for Adaptive Force Softening in Collisionless and Multi-Species N-Body Simulations

Philip F. Hopkins, Ethan O. Nadler, Michael Y. Grudic, Xuejian Shen, Isabel Sands | Summary: [[{“value”:”Modeling self-gravity of collisionless fluids (e.g. ensembles of dark matter, stars, black holes, dust, planetary bodies) in simulations is challenging and requires some force softening. It is often desirable to allow softenings to evolve adaptively, in any high-dynamic range simulation, […]


Continue.. Novel Conservative Methods for Adaptive Force Softening in Collisionless and Multi-Species N-Body Simulations