Results 101 to 110 of about 53,302 (262)

Active Galactic Nucleus Jet-inflated Bubbles as Possible Origin of Odd Radio Circles

The Astrophysical Journal
Odd radio circles (ORCs) are newly discovered extragalactic radio objects with an unknown origin. In this work, we carry out three-dimensional cosmic-ray (CR) magnetohydrodynamic simulations using the FLASH code and predict the radio morphology of end-on
Yen-Hsing Lin, H.-Y. Karen Yang
doaj   +1 more source

The Extremely Low Mechanical Force Generated by Nano‐Pulling Induces Global Changes in the Microtubule Network, Nuclear Morphology, and Chromatin Transcription in Neurons

Small, EarlyView.
Nano‐pulling induces stabilization, reorganization, and reorientation of the microtubule network. The nucleus of stretched cells experiences increased lateral tension, becomes more spherical, and develops surface grooves. At the level of gene expression regulation, changes in nuclear morphology induce global chromatin remodeling, leading to reduced ...
Alessandro Falconieri, Lorenzo Da Palmata, Valentina Cappello, Tiziana Julia Nadjeschda Schmidt, Pietro Folino, Barbara Storti, Ranieri Bizzarri, Vittoria Raffa   +7 more
wiley   +1 more source

High-frequency Power Spectrum of Active Galactic Nucleus NGC 4051 Revealed by NICER

The Astrophysical Journal Letters
Variability studies offer a compelling glimpse into black hole dynamics, and Neutron Star Interior Composition Explorer's (NICER’s) remarkable temporal resolution propels us even further.
B. Rani, Jungeun Kim, I. Papadakis, K. C. Gendreau, M. Masterson, K. Hamaguchi, E. Kara, S.-S. Lee, R. Mushotzky   +8 more
doaj   +1 more source

Multiple Channels for Nitrogen Pollution by Metal-enriched Supermassive Stars and Implications for GN-z11

The Astrophysical Journal Letters, 2023
GN-z11 is an unusually luminous high-redshift galaxy that was recently observed to have strong nitrogen lines while at the same time lacking traditional signatures of active galactic nucleus activity.
Chris Nagele, Hideyuki Umeda
doaj   +1 more source

3C 273 WITH NuSTAR: UNVEILING THE ACTIVE GALACTIC NUCLEUS [PDF]

, 2015
We present results from a 244 ks NuSTAR observation of 3C 273 obtained during a cross-calibration campaign with the Chandra, INTEGRAL, Suzaku, Swift, and XMM-Newton observatories. We show that the spectrum, when fit with a power-law model using data from
K. Madsen, F. Fürst, D. Walton, F. Harrison, K. Nalewajko, D. Ballantyne, S. Boggs, L. Brenneman, F. Christensen, W. Craig, A. Fabian, K. Forster, B. Grefenstette, M. Guainazzi, C. Hailey, G. Madejski, G. Matt, D. Stern, R. Walter, Will Zhang   +19 more
semanticscholar   +1 more source

Age‐Associated Decline in Autophagy Pathways in the Retinal Pigment Epithelium and Protective Effects of Topical Trehalose in Light‐Induced Outer Retinal Degeneration in Mice

Aging Cell, EarlyView.
Transcriptomic analyses reveal an age‐related decline in autophagy pathways in RPE/choroid. These pathways remain unchanged in early AMD but become bidirectionally dysregulated in later stages, along with increased RPE loss. Pre‐treatment with trehalose eyedrops enhances RPE autophagy flux and prevents light‐induced outer retinal degeneration in mice ...
Katherine Cox, Gongyu Shi, Neve Read, Mohamed T. Patel, Kepeng Ou, Zijia Liu, Jiahui Wu, Suci Cendanawati, Jenna Le Brun Powell, Pola Goldberg Oppenheimer, Lisa J. Hill, Lindsay B. Nicholson, Andrew D. Dick, Jian Liu   +13 more
wiley   +1 more source

Can the Symmetric Fermi and eROSITA Bubbles Be Produced by Tilted Jets?

The Astrophysical Journal
The Fermi Gamma-Ray Space Telescope reveals two large bubbles in the Galaxy, extending nearly symmetrically ∼50° above and below the Galactic center (GC).
Po-Hsun Tseng, H.-Y. Karen Yang, Chun-Yen Chen, Hsi-Yu Schive, Tzihong Chiueh   +4 more
doaj   +1 more source

Cosmological Evolution of the Hard X-Ray Active Galactic Nucleus Luminosity Function and the Origin of the Hard X-Ray Background [PDF]

, 2003
We investigate the cosmological evolution of the hard X-ray luminosity function (HXLF) of active galactic nuclei (AGNs) in the 2-10 keV luminosity range of 1041.5-1046.5 ergs s-1 as a function of redshift up to 3.
Y. Ueda, M. Akiyama, K. Ohta, T. Miyaji
semanticscholar   +1 more source

VIS‐to‐MIR reflectance and Raman spectroscopy of the CM2 NWA 12184 carbonaceous chondrite

Meteoritics &Planetary Science, Volume 60, Issue 3, Page 570-595, March 2025.
Abstract The spectral analysis of CM meteorites can help to constrain the mineralogical composition of their parent body, the C‐type asteroids. The CM2 NWA 12184 was spectrally examined employing seven complementary techniques at different spatial resolutions, including VIS‐to‐MIR reflectance and Raman spectroscopy.
A. Galiano, F. Dirri, M. Ferrari, C. Carli, E. Bruschini, G. Filacchione, G. Piccioni, E. Palomba, S. Stefani, A. Raponi, M. Ciarniello, M. E. Palumbo, C. Scirè Scappuzzo, G. Baratta, R. G. Urso, L. Inno   +15 more
wiley   +1 more source

EVIDENCE FOR WIDE-SPREAD ACTIVE GALACTIC NUCLEUS-DRIVEN OUTFLOWS IN THE MOST MASSIVE z ∼ 1–2 STAR-FORMING GALAXIES [PDF]

, 2014
In this paper, we follow up on our previous detection of nuclear ionized outflows in the most massive (log(M*/M☉) ⩾ 10.9) z ∼ 1–3 star-forming galaxies by increasing the sample size by a factor of six (to 44 galaxies above log(M*/M☉) ⩾ 10.9) from a ...
R. Genzel, N. F. Schreiber, D. Rosario, P. Lang, D. Lutz, E. Wisnioski, E. Wuyts, S. Wuyts, K. Bandara, R. Bender, S. Berta, J. Kurk, J. Mendel, L. Tacconi, D. Wilman, A. Beifiori, G. Brammer, A. Burkert, P. Buschkamp, J. Chan, C. Carollo, R. Davies, F. Eisenhauer, M. Fabricius, M. Fossati, M. Kriek, S. Kulkarni, S. Lilly, C. Mancini, I. Momcheva, T. Naab, E. Nelson, A. Renzini, R. Saglia, R. Sharples, A. Sternberg, S. Tacchella, P. V. Dokkum   +37 more
semanticscholar   +1 more source