Results 71 to 80 of about 1,957 (169)

Combined Fit of Spectrum and Composition for FR0 Radio-galaxy-emitted Ultra–high energy Cosmic Rays with Resulting Secondary Photons and Neutrinos

The Astrophysical Journal
This study comprehensively investigates the gamma-ray dim population of Fanaroff–Riley Type 0 (FR0) radio galaxies as potentially significant sources of ultra–high energy cosmic rays (UHECRs, E > 10 ^18 eV) detected on Earth.
Jon Paul Lundquist, Serguei Vorobiov, Lukas Merten, Anita Reimer, Margot Boughelilba, Paolo Da Vela, Fabrizio Tavecchio, Giacomo Bonnoli, Chiara Righi   +8 more
doaj   +1 more source

The AURORA Survey: Tracing Galactic Outflows at z ≳ 2.5 with JWST/NIRSpec Near-ultraviolet Absorption Lines

The Astrophysical Journal
We probe galactic-scale outflows in star-forming galaxies at z  ≳ 2.5 drawn from the JWST/NIRSpec AURORA program. For the first time, we directly compare outflow properties from the early Universe to the present day using near-UV absorption lines.
Emily Kehoe, Alice E. Shapley, Ryan L. Sanders, Naveen A. Reddy, Michael W. Topping, Natalie Lam, Leonardo Clarke, Fergus Cullen, Richard S. Ellis, N. M. Förster Schreiber, Tucker Jones, Ali Ahmad Khostovan, Derek J. McLeod, Ross J. McLure, Desika Narayanan, Pascal Oesch, Anthony J. Pahl   +16 more
doaj   +1 more source

Preliminary Evidence for Lensing-induced Alignments of High-redshift Galaxies in JWST-CEERS

The Astrophysical Journal
The majority of low-mass ( ${\mathrm{log}}_{10}{M}_{* }/{M}_{\odot }=9\mbox{--}10$ ) galaxies at high redshift ( z  > 1) appear elongated in projection. We use JWST-CEERS observations to explore the role of gravitational lensing in this puzzle.
Viraj Pandya, Abraham Loeb, Elizabeth J. McGrath, Guillermo Barro, Steven L. Finkelstein, Henry C. Ferguson, Norman A. Grogin, Jeyhan S. Kartaltepe, Anton M. Koekemoer, Casey Papovich, Nor Pirzkal, L. Y. Aaron Yung   +11 more
doaj   +1 more source

Dwarf Galaxies Hosting Extreme Star-forming Regions and (Variable) Active Galactic Nuclei at Radio Wavelengths

The Astrophysical Journal
We present a detailed study of radio-detected dwarf galaxies ( M _⋆  ≲ 3 × 10 ^9 M _⊙ ) to characterize extreme star formation and search for (variable) radio active galactic nuclei (AGNs). Our sample comes from A. E.
John-Michael Eberhard, Amy E. Reines
doaj   +1 more source

Radial Distributions of Star Formation and Gas-phase Metallicity in Spiral–Elliptical Galaxy Pairs

The Astrophysical Journal
Using integral-field spectroscopy from the fourth-generation Sloan Digital Sky Survey Mapping Nearby Galaxies at Apache Point Observatory, we investigate the radial distributions of the star formation rates (SFRs) and gas-phase metallicities in spiral ...
Cailu Shi, Shuai Feng, Shiyin Shen, Linlin Li, Wenyuan Cui, Guozhen Hu   +5 more
doaj   +1 more source

The ALPINE-CRISTAL-JWST Survey: Stellar and Nebular Dust Attenuation of Main-sequence Galaxies at z ∼ 4–6

The Astrophysical Journal
Characterizing dust attenuation is crucial for revealing the intrinsic physical properties of galaxies. We present an analysis of dust attenuation in 18 spectroscopically confirmed star-forming main-sequence galaxies at z = 4.4−5.7 observed with JWST ...
Akiyoshi Tsujita, Seiji Fujimoto, Andreas Faisst, Médéric Boquien, Juno Li, Andrea Ferrara, Andrew J. Battisti, Poulomi Dam, Manuel Aravena, Matthieu Béthermin, Caitlin M. Casey, Olivia R. Cooper, Steven L. Finkelstein, Michele Ginolfi, Diego A. Gómez-Espinoza, Ali Hadi, Rodrigo Herrera-Camus, Edo Ibar, Hanae Inami, Gareth C. Jones, Anton M. Koekemoer, Kotaro Kohno, Brian C. Lemaux, Zhaoxuan Liu, Ilse De Looze, Ikki Mitsuhashi, Bahram Mobasher, Juan Molina, Ambra Nanni, Francesca Pozzi, Naveen A. Reddy, Monica Relano, Giulia Rodighiero, Michael Romano, David B. Sanders, Prasad Sawant, Manuel Solimano, Laura Sommovigo, Justin Spilker, Ken-ichi Tadaki, Livia Vallini, Vicente Villanueva, Wuji Wang, Giovanni Zamorani, ALPINE+CRISTAL collaborations   +44 more
doaj   +1 more source

A Complete 16 μm Selected Galaxy Sample at z ∼ 1. II. Morphological Analysis

The Astrophysical Journal
We present a morphological analysis of the 16 μ m flux-density-limited galaxy sample at 0.8 < z < 1.3 from Huang et al. (2021). At the targeted redshift, the 16 μ m emission corresponds to the polycyclic aromatic hydrocarbon feature from intense star ...
Piaoran Liang, Y. Sophia Dai, Jia-Sheng Huang, Cheng Cheng, Yaru Shi   +4 more
doaj   +1 more source

Probing the Stellar Populations and Star Formation History of Early-type Galaxies at 0 < z < 1.1 in the Rest-frame Ultraviolet

The Astrophysical Journal
We measure the evolution of the rest-frame near-ultraviolet (NUV)− V colors for early-type galaxies in clusters at 0 < z < 1.1 using data from the Hyper Suprime-Cam Subaru Strategic Program, CFHT Large Area U -band Deep Survey, and local Sloan Digital ...
Sadman S. Ali, Roberto De Propris, Chul Chung, Steven Phillipps, Malcolm N. Bremer, Masato Onodera, Marcin Sawicki, Guillaume Desprez, Stephen Gwyn   +8 more
doaj   +1 more source

UV Spectral Slope and Nebular Dust Attenuation in Dwarf Galaxies at 1.4 < z < 2.6

The Astrophysical Journal
We analyze nebular dust attenuation and its correlation with stellar mass ( M _* ) and ultraviolet (UV) spectral slope ( β ) in 33 lensed, low-mass star-forming galaxies at 1.4 ≤ z ≤ 2.6, using Keck/Multi-Object Spectrometer For IR Exploration (MOSFIRE ...
Anahita Alavi, Brian Siana, Harry I. Teplitz, Timothy Gburek, James Colbert, Vihang Mehta, Najmeh Emami, William R. Freeman, Johan Richard, Keunho Kim   +9 more
doaj   +1 more source

Structure and Kinematics of Star-forming Elliptical Galaxies in SDSS-MaNGA

The Astrophysical Journal
Using “spatially” resolved spectroscopy, we investigated the characteristics and different modes of formation of stars in elliptical galaxies. We identified an unusual population of 59 star-forming elliptical (SF-E) galaxies in SDSS-MaNGA, our primary ...
Pralay Biswas, Yogesh Wadadekar
doaj   +1 more source