Introducing the THESAN-ZOOM project: radiation-hydrodynamic simulations of high-redshift galaxies with a multi-phase interstellar medium

Posted by klaurent MIT

Kavli Affiliate: Mark Vogelsberger | First 5 Authors: , , , , | Summary: We introduce the THESAN-ZOOM project, a comprehensive suite of high-resolution zoom-in simulations of $14$ high-redshift ($z>3$) galaxies selected from the THESAN simulation volume. This sample encompasses a diverse range of halo masses, with $M_mathrmhalo approx 10^8 – 10^13~mathrmM_odot$ at $z=3$. At […]


Continue.. Introducing the THESAN-ZOOM project: radiation-hydrodynamic simulations of high-redshift galaxies with a multi-phase interstellar medium

Aeos: The Impact of Pop III Initial Mass Function and Star-by-Star Models in Galaxy Simulations

Posted by klaurent MIT

Kavli Affiliate: Anna Frebel | First 5 Authors: , , , , | Summary: We explore the effect of variations in the Population III (Pop III) initial mass function (IMF) and star-by-star feedback on early galaxy formation and evolution using the Aeos simulations. We compare simulations with two different Pop III IMFs: $M_textchar = 10 […]


Continue.. Aeos: The Impact of Pop III Initial Mass Function and Star-by-Star Models in Galaxy Simulations

Temperature Profiles of Accretion Disks in Luminous Active Galactic Nuclei derived from Ultraviolet Spectroscopic Variability

Posted by dbos Peking

Kavli Affiliate: Luis C. Ho | First 5 Authors: Suyeon Son, Minjin Kim, Luis C. Ho, , | Summary: The characteristic timescale ($tau$) of continuum variability of the accretion disk in active galactic nuclei (AGNs) is known to be related to the thermal timescale, which is predicted to scale with AGN luminosity ($L$) and restframe […]


Continue.. Temperature Profiles of Accretion Disks in Luminous Active Galactic Nuclei derived from Ultraviolet Spectroscopic Variability

H I absorption line and anomalous dispersion in the radio pulses of PSR B1937+21

Posted by klaurent Peking

Kavli Affiliate: Kejia Lee | First 5 Authors: Jinchen Jiang, Shunshun Cao, Kejia Lee, Bojun Wang, Heng Xu | Summary: We use the Five-hundred-meter Aperture Spherical radio Telescope (FAST) to observe the bright millisecond pulsar (MSP) PSR B1937+21 (J1939+2134) and record the data in the band from 1.0 GHz to 1.5 GHz. We measure the […]


Continue.. H I absorption line and anomalous dispersion in the radio pulses of PSR B1937+21

H I absorption line and anomalous dispersion in the radio pulses of PSR B1937+21

Posted by klaurent Peking

Kavli Affiliate: Kejia Lee | First 5 Authors: , , , , | Summary: We use the Five-hundred-meter Aperture Spherical radio Telescope to observe the bright millisecond pulsar PSR B1937+21 (J1939+2134) and record the data in the band from 1.0 to 1.5 GHz. We measure the neutral hydrogen (HI) emission and absorption lines near 1420 […]


Continue.. H I absorption line and anomalous dispersion in the radio pulses of PSR B1937+21

The Massive and Distant Clusters of $WISE$ Survey. XII. Exploring X-ray AGN in Dynamically Active Massive Galaxy Clusters at z~1

Posted by dbos MIT

Kavli Affiliate: Michael McDonald | First 5 Authors: Mustafa Muhibullah, Mark Brodwin, Michael McDonald, Anthony H. Gonzalez, Emily Moravec | Summary: We present an analysis of the cluster X-ray morphology and active galactic nucleus (AGN) activity in nine $zsim1$ galaxy clusters from the Massive and Distant Clusters of $WISE$ Survey (MaDCoWS) observed with $Chandra$. Using […]


Continue.. The Massive and Distant Clusters of $WISE$ Survey. XII. Exploring X-ray AGN in Dynamically Active Massive Galaxy Clusters at z~1

A Tentative Detection of Molecular Hydrogen (H$_2$) Emission Lines at Cosmic Dawn

Posted by klaurent Cambridge

Kavli Affiliate: Roberto Maiolino | First 5 Authors: , , , , | Summary: We present a theoretical framework for interpreting far-ultraviolet (FUV) fluorescent emission from molecular hydrogen (H$_2$) in high-redshift galaxies, motivated by the unique capabilities of the James Webb Space Telescope (JWST) to probe the rest frame FUV at cosmic dawn. Using the […]


Continue.. A Tentative Detection of Molecular Hydrogen (H$_2$) Emission Lines at Cosmic Dawn

Spectroastrometry and Reverberation Mapping of Active Galactic Nuclei. II. Measuring Geometric Distances and Black Hole Masses of Four Nearby Quasars

Posted by klaurent Peking

Kavli Affiliate: Luis C. Ho | First 5 Authors: , , , , | Summary: The geometric distances of active galactic nuclei (AGNs) are challenging to measure because of their exceptionally compact structure yet vast cosmic distances. A combination of spectroastrometry and reverberation mapping (SARM) of broad-line regions (BLRs) constitutes a novel means to probe […]


Continue.. Spectroastrometry and Reverberation Mapping of Active Galactic Nuclei. II. Measuring Geometric Distances and Black Hole Masses of Four Nearby Quasars

Asteroseismic Study of Subgiants and Giants of the Open Cluster M67 using Kepler/K2: Expanded Sample and Precise Masses

Posted by dbos MIT

Kavli Affiliate: Andrew Vanderburg | First 5 Authors: Claudia Reyes, Dennis Stello, Marc Hon, Yaguang Li, Timothy R. Bedding | Summary: Sparked by the asteroseismic space revolution, ensemble studies have been used to produce empirical relations linking observed seismic properties and fundamental stellar properties. Cluster stars are particularly valuable because they have the same metallicity, […]


Continue.. Asteroseismic Study of Subgiants and Giants of the Open Cluster M67 using Kepler/K2: Expanded Sample and Precise Masses