Results 111 to 120 of about 405,217 (280)

Cosmology Due to Thermodynamics of Apparent Horizon

Annalen der Physik, Volume 537, Issue 11, November 2025.
Effective cosmological constant as a function of the Hubble rate H for different entropy parameters b. Figure shows the asymptotic of the effective cosmological constant. At H = 0 the effective cosmological constant vanishes. Abstract This study proposes new entropy of the apparent horizon Sh=(1/β)arctan(βSBH)$S_h=(1/\beta)\arctan (\beta S_{BH ...
S. I. Kruglov
wiley   +1 more source

Deeper, Sharper, Faster: Application of Efficient Transformer to Galaxy Image Restoration

The Astrophysical Journal
The Transformer architecture has revolutionized the field of deep learning over the past several years in diverse areas, including natural language processing, code generation, image recognition, and time-series forecasting.
Hyosun Park, Yongsik Jo, Seokun Kang, Taehwan Kim, M. James Jee   +4 more
doaj   +1 more source

Non-affine extensions of the Raychaudhuri equation in the K-essence framework

Physics Letters B
We present a new avenue of the Raychaudhuri Equation (RE) by introducing a non-affine parametrization within the k-essence framework. This modification accounts for non-geodesic flow curves, leading to emergent repulsive effects in cosmic evolution ...
Samit Ganguly, Goutam Manna, Debashis Gangopadhyay, Eduardo Guendelman, Abhijit Bhattacharyya   +4 more
doaj   +1 more source

MIDIS: Strong (Hβ+[O iii]) and Hα Emitters at Redshift z ≃ 7–8 Unveiled with JWST NIRCam and MIRI Imaging in the Hubble eXtreme Deep Field

The Astrophysical Journal, 2023
We make use of JWST medium-band and broadband NIRCam imaging, along with ultradeep MIRI 5.6 μ m imaging, in the Hubble eXtreme Deep Field to identify prominent line emitters at z ≃ 7–8.
P. Rinaldi, K. I. Caputi, L. Costantin, S. Gillman, E. Iani, P. G. Pérez-González, G. Östlin, L. Colina, T. R. Greve, H. U. Noorgard-Nielsen, G. S. Wright, A. Alonso-Herrero, J. Álvarez-Márquez, A. Eckart, M. García-Marín, J. Hjorth, O. Ilbert, S. Kendrew, A. Labiano, O. Le Fèvre, J. Pye, T. Tikkanen, F. Walter, P. van der Werf, M. Ward, M. Annunziatella, R. Azzollini, A. Bik, L. Boogaard, S. E. I. Bosman, A. Crespo Gómez, I. Jermann, D. Langeroodi, J. Melinder, R. A. Meyer, T. Moutard, F. Peissker, M. Topinka, E. van Dishoeck, M. Güdel, Th. Henning, P.-O. Lagage, T. Ray, B. Vandenbussche, C. Waelkens, R. Navarro-Carrera, V. Kokorev   +46 more
doaj   +1 more source

Dark-ages reionization and galaxy formation simulation XI: Clustering and halo masses of high redshift galaxies

, 2017
We investigate the clustering properties of Lyman-break galaxies (LBGs) at $z\sim6$ - $8$. Using the semi-analytical model {\scshape Meraxes} constructed as part of the Dark-ages Reionization And Galaxy-formation Observables from Numerical Simulation ...
Duffy, Alan R., Geil, Paul M., Kim, Han-Seek, Liu, Chuanwu, Mesinger, Andrei, Mutch, Simon J., Park, Jaehong, Poole, Gregory B., Trenti, M., Wyithe, J. Stuart B.   +9 more
core   +1 more source

Seizing opportunities and navigating the challenges of spaceflight research as an early career researcher

Experimental Physiology, EarlyView.
Colleen S. Deane
wiley   +1 more source

JWST Imaging of the Closest Globular Clusters—VI. The Lowest‐Mass Objects in M 4 and the Galactic Bulge

Astronomische Nachrichten, Volume 346, Issue 9, November 2025.
ABSTRACT We present James Webb Space Telescope observations of M 4—the closest globular cluster—that probe the lower Main Sequence down to the hydrogen‐burning limit. The unveiled stellar sequence reaches much fainter luminosities than previously possible, revealing a few extremely red objects that are consistent with brown dwarfs as cool as Teff∼1000K$
L. R. Bedin, R. Gerasimov, A. Calamida, M. Libralato, M. Scalco, D. Nardiello, M. Griggio, D. Apai, J. Anderson, A. Bellini, A. Burgasser   +10 more
wiley   +1 more source

NGDEEP Epoch 1: Spatially Resolved Hα Observations of Disk and Bulge Growth in Star-forming Galaxies at z ∼ 0.6–2.2 from JWST NIRISS Slitless Spectroscopy

The Astrophysical Journal Letters
We study the H α equivalent width (EW(H α )) maps of 19 galaxies at 0.6 < z < 2.2 in the Hubble Ultra Deep Field using NIRISS slitless spectroscopy as part of the Next Generation Deep Extragalactic Exploratory Public Survey.
Lu Shen, Casey Papovich, Jasleen Matharu, Nor Pirzkal, Weida Hu, Bren E. Backhaus, Micaela B. Bagley, Yingjie Cheng, Nikko J. Cleri, Steven L. Finkelstein, Marc Huertas-Company, Mauro Giavalisco, Norman A. Grogin, Intae Jung, Jeyhan S. Kartaltepe, Anton M. Koekemoer, Jennifer M. Lotz, Michael V. Maseda, Pablo G. Pérez-González, Barry Rothberg, Raymond C. Simons, Sandro Tacchella, Christina C. Williams, L. Y. Aaron Yung   +23 more
doaj   +1 more source

An 850 Micron SCUBA Survey of the Hubble Deep Field-North GOODS Region [PDF]

, 2004
The Hubble Deep Field-North (HDF-N) is one of the best-studied extragalactic fields, and ultradeep optical, radio, X-ray, and mid-infrared wide-field images are available for this area.
W.-H. Wang, L. Cowie, A. S. M. F. Astronomy, U. Hawaii, D. O. Astronomy, U. Wisconsin--Madison, D. Physics, Astronomy   +7 more
semanticscholar   +1 more source

First Detection of [SI] in Near‐IR JWST Observations of Io in Eclipse, and Comparison With SO Emissions, Evolving Volcanic Eruptions, and Prior UV HST‐STIS [SI] Emissions

Journal of Geophysical Research: Planets, Volume 130, Issue 11, November 2025.
Abstract We observed Io with the James Webb Space Telescope (JWST) NIRSpec/Integral Field Unit (1.0–5.3 μm, R∼2700 $R\sim 2700$) in August 2023 while the satellite was in eclipse. Thermal emission from Kanehekili Fluctus is consistent with the cooling of lava flows after a vigorous eruption in November 2022.
Imke de Pater, Darrell F. Strobel, Ashley Gerard Davies, Joachim Saur, Lorenz Roth, Katherine de Kleer, Emmanuel Lellouch, Zachariah Milby, Carl Schmidt, Thierry Fouchet, Michael H. Wong, Leigh N. Fletcher, Jake Harkett, Michael Roman, Richard J. Cartwright, Jason E. Perry, Julie Renaud‐Kim, Carolyn Jordan, Stephan Schlegel, David A. Williams, David M. Nelson   +20 more
wiley   +1 more source