Astrophysics – Page 41 – Kavli Institute Pre-Print Publications

Unveiling the Cosmic Chemistry: Revisiting the Mass-Metallicity Relation with JWST/NIRSpec at 4 < z < 10

Posted by dbos August 15, 2024MIT

Kavli Affiliate: Michael McDonald | First 5 Authors: Arnab Sarkar, Priyanka Chakraborty, Mark Vogelsberger, Michael McDonald, Paul Torrey | Summary: We present star formation rates (SFR), the mass-metallicity relation (MZR), and the SFR-dependent MZR across redshifts 4 to 10 using 81 star-forming galaxies observed by the JWST NIRSpec employing both low-resolution PRISM and medium-resolution gratings, […]

Continue..

From Halos to Galaxies. X: Decoding Galaxy SEDs with Physical Priors and Accurate Star Formation History Reconstruction

Posted by dbos August 14, 2024August 27, 2024Peking

Kavli Affiliate: Luis C. Ho | First 5 Authors: Zeyu Gao, Yingjie Peng, Kai Wang, Luis C. Ho, Alvio Renzini | Summary: The spectral energy distribution (SED) of galaxies is essential for deriving fundamental properties like stellar mass and star formation history (SFH). However, conventional methods, including both parametric and non-parametric approaches, often fail to […]

Continue..

From Halos to Galaxies. X: Decoding Galaxy SEDs with Physical Priors and Accurate Star Formation History Reconstruction

Posted by dbos August 14, 2024August 27, 2024Peking

Kavli Affiliate: Yingjie Peng | First 5 Authors: Zeyu Gao, Yingjie Peng, Kai Wang, Luis C. Ho, Alvio Renzini | Summary: The spectral energy distribution (SED) of galaxies is essential for deriving fundamental properties like stellar mass and star formation history (SFH). However, conventional methods, including both parametric and non-parametric approaches, often fail to accurately […]

Continue..

Field-level Emulation of Cosmic Structure Formation with Cosmology and Redshift Dependence

Posted by dbos August 14, 2024Tokyo

Kavli Affiliate: David N. Spergel | First 5 Authors: Drew Jamieson, Yin Li, Francisco Villaescusa-Navarro, Shirley Ho, David N. Spergel | Summary: We present a field-level emulator for large-scale structure, capturing the cosmology dependence and the time evolution of cosmic structure formation. The emulator maps linear displacement fields to their corresponding nonlinear displacements from N-body […]

Continue..

Dominating Set Reconfiguration with Answer Set Programming

Posted by dbos August 14, 2024August 27, 2024Tokyo

Kavli Affiliate: Naoyuki Tamura | First 5 Authors: Masato Kato, Torsten Schaub, Takehide Soh, Naoyuki Tamura, Mutsunori Banbara | Summary: The dominating set reconfiguration problem is defined as determining, for a given dominating set problem and two among its feasible solutions, whether one is reachable from the other via a sequence of feasible solutions subject […]

Continue..

Evolving Dark Energy or Supernovae Systematics?

Posted by dbos August 13, 2024Cambridge

Kavli Affiliate: George Efstathiou | First 5 Authors: George Efstathiou, , , , | Summary: Recent results from the Dark Energy Spectroscopic Instrument (DESI) collaboration have been interpreted as evidence for evolving dark energy. However, this interpretation is strongly dependent on which Type Ia supernova (SN) sample is combined with DESI measurements of baryon acoustic […]

Continue..

Evolving Dark Energy or Supernovae Systematics?

Posted by dbos August 13, 2024Cambridge

Continue..

Quantifying Bursty Star Formation in Dwarf Galaxies

Posted by dbos August 13, 2024August 27, 2024Chicago

Kavli Affiliate: Alexander P. Ji | First 5 Authors: Yuan-Sen Ting, Alexander P. Ji, , , | Summary: Dwarf galaxy star formation histories are theoretically expected to be bursty, potentially leaving distinct imprints on their chemical evolution. We propose that episodic starbursts with quiescent periods longer than $sim$100 Myr should lead to discontinuous tracks in […]

Continue..

Implementation and Characterization of the Vector Vortex Coronagraph on the SEAL Testbed

Posted by dbos August 12, 2024August 27, 2024Stanford

Kavli Affiliate: Bruce Macintosh | First 5 Authors: Ashai Moreno, Vincent Chambouleyron, Rebecca M. Jensen-Clem, Daren Dillon, Philip M. Hinz | Summary: The Santa Cruz Extreme AO Lab (SEAL) testbed is an optical bench meant to design and develop new wavefront control techniques for high-contrast imaging for segmented telescopes. These techniques allow for astronomical efficiency […]

Continue..

Modeling parity-violating spectra in Galactic dust polarization with filaments and its applications to cosmic birefringence searches

Posted by dbos August 12, 2024Stanford

Kavli Affiliate: Susan E. Clark | First 5 Authors: Carlos Hervías-Caimapo, Ari J. Cukierman, Patricia Diego-Palazuelos, Kevin M. Huffenberger, Susan E. Clark | Summary: We extend the dust-filament-based model presented in Herv’ias-Caimapo & Huffenberger 2022 to produce parity-violating foreground spectra by manipulating the filament orientations relative to the magnetic field. We calibrate our model to […]

Continue..