Results 181 to 190 of about 1,357,920 (351)

Masses, Star Formation Efficiencies, and Dynamical Evolution of 18,000 H ii Regions

The Astrophysical Journal Letters
We present measurements of the masses associated with ∼18,​​​​​000 H ii regions across 19 nearby star-forming galaxies by combining data from JWST, Hubble Space Telescope, MUSE, Atacama Large Millimeter/submillimeter Array, Very Large Array, and MeerKAT ...
Debosmita Pathak, Adam K. Leroy, Ashley. T. Barnes, Todd A. Thompson, Laura A. Lopez, Karin M. Sandstrom, Jiayi Sun, Simon C. O. Glover, Ralf S. Klessen, Eric W. Koch, Kirsten L. Larson, Janice Lee, Sharon Meidt, Patricia Sanchez-Blazquez, Eva Schinnerer, Zein Bazzi, Francesco Belfiore, Médéric Boquien, Ryan Chown, Dario Colombo, Enrico Congiu, Oleg V. Egorov, Cosima Eibensteiner, Sushma Kurapati, Miguel Querejeta, Daniel A. Dale, Timo Kravtsov, Mansi Padave, D. J. Pisano, Erik Rosolowsky, Sumit K. Sarbadhicary, Thomas G. Williams, Remy Indebetouw, Hsi-An Pan, Leonardo Úbeda, Amirnezam Amiri, Frank Bigiel, Guillermo A. Blanc, Kathryn Grasha   +38 more
doaj   +1 more source

Metformin promotes mitochondrial integrity through AMPK‐signaling in Leber's hereditary optic neuropathy

FEBS Open Bio, EarlyView.
Metformin mediates mitochondrial quality control in Leber's hereditary optic neuropathy (LHON) fibroblasts carrying mtDNA mutations. At therapeutic levels, metformin activates AMPK signaling to restore mitochondrial dynamics by promoting fusion and restraining fission, while preserving mitochondrial mass, enhancing autophagy/mitophagy and biogenesis ...
Chatnapa Panusatid, Rapasviranda Soiyangsuk, Maneeluck Tanadjindarat, Chayanon Peerapittayamongkol   +3 more
wiley   +1 more source

A negative stellar mass−gaseous metallicity gradient relation of dwarf galaxies modulated by stellar feedback

Astronomy & Astrophysics
Baryonic cycling is reflected in the spatial distribution of metallicity within galaxies; however, gas-phase metallicity distribution and its connection with other properties of dwarf galaxies are largely unexplored. We present the first systematic study of radial gradients of gas-phase metallicities for a sample of 55 normal nearby star-forming dwarf ...
Tie Li, Hong-Xin Zhang, Wenhe Lyu, Yimeng Tang, Yao Yao, Enci Wang, Yu Rong, Guangwen Chen, Xu Kong, Fuyan Bian, Qiusheng Gu, Evelyn J. Johnston, Xin Li, Shude Mao, Yong Shi, Junfeng Wang, Xin Wang, Xiaoling Yu, Zhiyuan Zheng   +18 more
openaire   +2 more sources

What Sets the Metallicity of Ultra-Faint Dwarfs?

The Open Journal of Astrophysics
We use intergalactic medium (IGM) metallicity distributions from several state-of-the-art cosmological simulations of Milky Way analogs and a semi-analytic model of ultra-faint dwarf galaxy (UFD) formation to model the stellar metallicities of UFDs in MW-
Vance Wheeler, Andrey Kravtsov, Anirudh Chiti, Harley Katz, Vadim A. Semenov   +4 more
doaj   +1 more source

Stellar and AGN Feedback in Isolated Early-type Galaxies: The Role in Regulating Star Formation and ISM Properties [PDF]

, 2018
Ya-Ping Li, Feng Yuan, Houjun Mo, Doosoo Yoon, Zhaoming Gan, Luis C. Ho, Bo Wang, Jeremiah P. Ostriker, Luca Ciotti   +8 more
openalex   +1 more source

Mycobacterial cell division arrest and smooth‐to‐rough envelope transition using CRISPRi‐mediated genetic repression systems

FEBS Open Bio, EarlyView.
CRISPRI‐mediated gene silencing and phenotypic exploration in nontuberculous mycobacteria. In this Research Protocol, we describe approaches to control, monitor, and quantitatively assess CRISPRI‐mediated gene silencing in M. smegmatis and M. abscessus model organisms.
Vanessa Point, Wafaa Achache, Janïs Laudouze, Eliana Sepulveda Ramos, Mickaël Maziero, Céline Crauste, Stéphane Canaan, Pierre Santucci   +7 more
wiley   +1 more source

AGN Feedback Models and AGN Demographics. I. Radio-mode AGN in EAGLE, SIMBA, and TNG100 Are Inconsistent with Observations

The Astrophysical Journal
We compare predictions of how active galactic nuclei (AGNs) populate host galaxies at low redshifts to observations, finding large discrepancies between cosmological simulation predictions and observed patterns.
Arjun Suresh, Michael R. Blanton, Douglas Rennehan   +2 more
doaj   +1 more source

A new mechanical stellar wind feedback model for the Rosette Nebula [PDF]

, 2018
C. J. Wareing, J. M. Pittard, N. J. Wright, S. A. E. G. Falle   +3 more
openalex   +1 more source

Microglial dynamics and ferroptosis induction in human iPSC‐derived neuron–astrocyte–microglia tri‐cultures

FEBS Open Bio, EarlyView.
A tri‐culture of iPSC‐derived neurons, astrocytes, and microglia treated with ferroptosis inducers as an Induced ferroptosis model was characterized by scRNA‐seq, cell survival, and cytokine release assays. This analysis revealed diverse microglial transcriptomic changes, indicating that the system captures key aspects of the complex cellular ...
Hongmei Lisa Li, Hiroko Ohmiya, Sou Sakamoto, Masato Yugami, Akiko Oki, Makoto Furusawa, Yan Ling   +6 more
wiley   +1 more source

Multiple Generation Star Formation in Cepheus Flare

The Astronomical Journal
We present an analysis of the young stellar moving group ASCC 127 using Gaia DR3 data, significantly expanding its membership to 3971 stars—double the number identified in previous studies.
Fan Wang, Min Fang, Xiaoting Fu, Yang Su, Xuepeng Chen, Shiyu Zhang, Penghui Liu, Xiao-Long Wang, Haijun Tian, Wenyuan Cui, Zhongmu Li   +10 more
doaj   +1 more source