Results 81 to 90 of about 110,517 (296)

Luminosity and Stellar Mass Functions of Faint Photometric Satellites around Spectroscopic Central Galaxies from DESI Year-1 Bright Galaxy Survey

The Astrophysical Journal
We measure the luminosity functions (LFs) and stellar mass functions (SMFs) of photometric satellite galaxies around spectroscopically identified isolated central galaxies (ICGs). The photometric satellites are from the DESI Legacy Imaging Surveys (DR9),
Wenting Wang, Xiaohu Yang, Yipeng Jing, Ashley J. Ross, Malgorzata Siudek, John Moustakas, Samuel G. Moore, Shaun Cole, Carlos Frenk, Jiaxi Yu, Sergey E. Koposov, Jiaxin Han, Zhenlin Tan, Kun Xu, Yizhou Gu, Yirong Wang, Oleg Y. Gnedin, Jessica Nicole Aguilar, Steven Ahlen, Davide Bianchi, David Brooks, Todd Claybaugh, Axel de la Macorra, Arjun Dey, Peter Doel, Jaime E. Forero-Romero, Enrique Gaztañaga, Satya Gontcho A Gontcho, Gaston Gutierrez, Klaus Honscheid, Mustapha Ishak, Theodore Kisner, Martin Landriau, Laurent Le Guillou, Marc Manera, Aaron Meisner, Ramon Miquel, Seshadri Nadathur, Claire Poppett, Francisco Prada, Ignasi Pérez-Ràfols, Graziano Rossi, Eusebio Sanchez, David Schlegel, Hee-Jong Seo, Joseph Harry Silber, David Sprayberry, Gregory Tarlé, Benjamin Alan Weaver, Hu Zou   +49 more
doaj   +1 more source

Real‐time assay of ribonucleotide reductase activity with a fluorescent RNA aptamer

FEBS Letters, EarlyView.
Ribonucleotide reductases (RNR) synthesize DNA building blocks de novo, making them crucial in DNA replication and drug targeting. FLARE introduces the first single‐tube real‐time coupled RNR assay, which enables isothermal tracking of RNR activity at nanomolar enzyme levels and allows the reconstruction of allosteric regulatory patterns and rapid ...
Jacopo De Capitani, Noemi E. Nwosu, Viktoria Gocke, Müge Kasanmascheff, Hannes Mutschler   +4 more
wiley   +1 more source

Autocorrelations of stellar light and mass in the low-redshift Universe

, 2010
The final data release of the Sloan Digital Sky Survey (SDSS) provides reliable photometry and spectroscopy for about half a million galaxies with median redshift 0.09.
Abazajian, Beisbart, Benoist, Blanton, Blanton, Blanton, Blanton, Boerner, Brown, Cheng Li, Cooray, Croton, Davis, Davis, Dressler, Einasto, Faltenbacher, Guo, Guzzo, Hamilton, Kauffmann, Kauffmann, Li, Li, Loveday, Norberg, Park, Sheth, Simon D. M. White, Skibba, Skibba, Skibba, Springel, Swanson, Von Der Linden, Von Der Linden, Wang, Watson, Weinmann, White, Willmer, York, Zehavi, Zehavi   +43 more
core   +1 more source

Measuring the stellar initial mass function

, 2020
The birth of stars and the formation of galaxies are cornerstones of modern astrophysics. While much is known about how galaxies globally and their stars individually form and evolve, one fundamental property that affects both remains elusive. This is problematic because this key property, the stellar initial mass function (IMF), is a key tracer of the
openaire   +1 more source

THE LOW-MASS STELLAR POPULATION IN L1641: EVIDENCE FOR ENVIRONMENTAL DEPENDENCE OF THE STELLAR INITIAL MASS FUNCTION [PDF]

The Astrophysical Journal, 2012
We present results from an optical photometric and spectroscopic survey of the young stellar population in L1641, the low-density star-forming region of the Orion A cloud south of the Orion Nebula Cluster (ONC). Our goal is to determine whether L1641 has a large enough low-mass population to make the known lack of high-mass stars a statistically ...
Hsu, Wen-Hsin, Hartmann, Lee, Allen, Lori, Hernandez, Jesus, Megeath, S. T., Mosby, Gregory, Tobin, John J., Espaillat, Catherine   +7 more
openaire   +3 more sources

Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing

FEBS Letters, EarlyView.
Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley   +1 more source

Ultradense Dark Matter Halos with Poisson Noise from Stellar-mass Primordial Black Holes

The Astrophysical Journal
In this work, we investigate the impact of Poisson noise from stellar-mass primordial black holes (PBHs) on the formation of ultradense dark matter halos (UDMHs).
Saeed Fakhry, Javad T. Firouzjaee
doaj   +1 more source

The DESI One-Percent Survey: Constructing Galaxy–Halo Connections for ELGs and LRGs Using Auto and Cross Correlations

The Astrophysical Journal, 2023
In the current Dark Energy Spectroscopic Instrument (DESI) survey, emission line galaxies (ELGs) and luminous red galaxies (LRGs) are essential for mapping the dark matter distribution at z ∼ 1. We measure the auto and cross correlation functions of ELGs
Hongyu Gao, Y. P. Jing, Shanquan Gui, Kun Xu, Yun Zheng, Donghai Zhao, Jessica Nicole Aguilar, Steven Ahlen, David Brooks, Todd Claybaugh, Kyle Dawson, Axel xde la Macorra, Peter Doel, Kevin Fanning, Jaime E. Forero-Romero, Satya Gontcho A Gontcho, Julien Guy, Klaus Honscheid, Robert Kehoe, Martin Landriau, Marc Manera, Aaron Meisner, Ramon Miquel, John Moustakas, Jeffrey A. Newman, Jundan Nie, Will Percival, Graziano Rossi, Michael Schubnell, Hee-Jong Seo, Gregory Tarlé, Benjamin Alan Weaver, Jiaxi Yu, Zhimin Zhou   +33 more
doaj   +1 more source

The Local Stellar Initial Mass Function

, 2000
This contribution describes the difficult task of inferring the IMF from local star-count data, by discussing the mass-luminosity relation, unresolved binary, triple and quadruple systems, abundance and age spreads and Galactic structure, all of which must be accounted for properly for the results to be meaningful.
openaire   +2 more sources

Constraining the Initial Mass Function via Stellar Transients

Universe
The stellar initial mass function (IMF) represents a fundamental quantity in astrophysics and cosmology describing the mass distribution of stars from low mass all the way up to massive and very massive stars. It is intimately linked to a wide variety of topics, including stellar and binary evolution, galaxy evolution, chemical enrichment, and ...
Francesco Gabrielli, Lumen Boco, Giancarlo Ghirlanda, Om Sharan Salafia, Ruben Salvaterra, Mario Spera, Andrea Lapi   +6 more
openaire   +3 more sources