Results 61 to 70 of about 228,395 (174)

Dwarf galaxy formation induced by galaxy interactions [PDF]

, 2000
Growing evidence has been accumulated for that some gas-rich dwarf galaxies are formed from material liberated by galaxy collisions and/or mergers. Also, gas-poor dwarf elliptical galaxies are often found in the central regions of clusters of galaxies.
arxiv   +1 more source

Probing extreme black‐hole outflows on short timescales via high spectral‐resolution x‐ray imagers

Astronomische Nachrichten, Volume 345, Issue 6-7, July-August 2024.
Abstract We investigate outflows and the physics of super‐Eddington versus sub‐Eddington regimes in black hole systems. Our focus is on prospective science using next‐generation high‐resolution soft x‐ray instruments. We highlight the properties of black hole ultraluminous x‐ray source (ULX) systems in particular. Owing to scale invariance in accreting
C. Pinto, J. F. Steiner, A. Bodaghee, P. Chakraborty, M. Sobolewska, D. R. Pasham, A. Ogorzalek, J. Zuhone, A. Bogdan, M. Vogelsberger   +9 more
wiley   +1 more source

Local Analogs for High-redshift Galaxies: Resembling the Physical Conditions of the Interstellar Medium in High-redshift Galaxies

, 2016
We present a sample of local analogs for high-redshift galaxies selected in the Sloan Digital Sky Survey (SDSS). The physical conditions of the interstellar medium (ISM) in these local analogs resemble those in high-redshift galaxies.
Bian, Fuyan, Dopita, Michael, Juneau, Stephanie, Kewley, Lisa   +3 more
core   +1 more source

Detection of Evolved High-Redshift Galaxies in Deep NICMOS/VLT Images [PDF]

, 1999
A substantial population of high redshift early-type galaxies is detected in very deep UBVRIJHK images towards the HDF-South. Four elliptical profile galaxies are identified in the redshift range z=1-2, all with very red SEDs, implying ages of >2 Gyrs ...
Binggeli B., Bower R. G., Fontana A., Joseph Silk, Kauffmann G., Lacey C., Narciso Benítez, Piero Rosati, Pozzetti L., Rychard Bouwens, Stiavelli M., Tom Broadhurst, Treu T.   +12 more
core   +2 more sources

Flexible, Photonic Films of Surfactant‐Functionalized Cellulose Nanocrystals for Pressure and Humidity Sensing

Small Structures, Volume 5, Issue 7, July 2024.
Cellulose nanocrystals are abundant, biodegradable nanoparticles that can self‐assemble into a helical stacking that exhibits structural color. By adding a single surfactant, cellulose nanocrystals can be made compatible with apolar solvents, which are widely used for industrial coatings.
Diogo V. Saraiva, Steven N. Remiëns, Ethan I. L. Jull, Ivo R. Vermaire, Lisa Tran   +4 more
wiley   +1 more source

The nature of Long-GRB host galaxies from chemical abundances

, 2010
Gamma-ray bursts (GRBs) are the most energetic events after the Big Bang and they have been observed up to very high redshift. By means of measures of chemical abundances now available for the galaxies hosting such events,thought to originate from the ...
Akerman, Bell, Bissaldi, Boissier, Bradamante, Calura, Calura, Calura, Campisi, Castro Cerón, Cescutti, Chary, Chen, Chiappini, Chiappini, Chisari, Cowie, F. Matteucci, François, Fynbo, Fynbo, Galama, Graham, Greiner, Hjorth, Hou, Iwamoto, J. Yin, Jakobsson, Kistler, Lamb, Lanfranchi, Lapi, Levesque, Levesque, Li, Liang, Mannucci, Mao, Matteucci, Matteucci, Matteucci, Matteucci, Micha▯owski, Møller, Naab, Nuza, Padovani, Pian, Pipino, Pipino, Pipino, Pontzen, Prochaska, Prochaska, Rau, Romano, Romano, Salpeter, Salvaterra, Savaglio, Savaglio, Schmidt, Shapley, Svensson, Tanvir, van den Hoek, Wolf, Wolfe, Woosley, Woosley, Woosley, X. L. Fan, Yin, Yin, Yoon, Zwaan   +76 more
core   +1 more source

Early Results from GLASS-JWST. XXV. Electron Density in the Interstellar Medium at 0.7 ≲ z ≲ 9.3 with NIRSpec High-resolution Spectroscopy

The Astrophysical Journal Letters
The electron density ( n _e ) of the interstellar medium (ISM) in star-forming galaxies is intimately linked to star formation and ionization condition.
Sijia Li, Xin Wang, Yuguang Chen, Tucker Jones, Tommaso Treu, Karl Glazebrook, Xianlong He, Alaina Henry, Xiao-Lei Meng, Takahiro Morishita, Guido Roberts-Borsani, Lilan Yang, Hao-Ran Yu, Antonello Calabrò, Marco Castellano, Nicha Leethochawalit, Benjamin Metha, Themiya Nanayakkara, Namrata Roy, Benedetta Vulcani   +19 more
doaj   +1 more source

ALMA Reveals a Stable Rotating Gas Disk in a Paradoxical Low-mass, Ultradusty Galaxy at z = 4.274

The Astrophysical Journal Letters, 2023
We report ALMA detections of [C ii ] and a dust continuum in Az9, a multiply imaged galaxy behind the Frontier Field cluster MACS J0717.5+3745. The bright [C ii ] emission line provides a spectroscopic redshift of z = 4.274. This strongly lensed ( μ = 7 ±
Alexandra Pope, Jed McKinney, Patrick Kamieneski, Andrew Battisti, Itziar Aretxaga, Gabriel Brammer, Jose M. Diego, David H. Hughes, Erica Keller, Danilo Marchesini, Andrew Mizener, Alfredo Montaña, Eric Murphy, Katherine E. Whitaker, Grant Wilson, Min Yun   +15 more
doaj   +1 more source

Ultrasensitive and Visible Detection of Influenza A Virus Based on Enzymatic Properties of Layered Gold Nanoparticles

Small Structures, Volume 5, Issue 4, April 2024.
An ultrasensitive and visible detection for influenza A virus is presented by leveraging the properties of gold nanoparticles (GNPs). Dual amplification, achieved through a synthetic nanoprobe utilizing the enzymatic properties of layered GNPs, exhibits a higher sensitivity. This system is suitable for point‐of‐care tests within 55 min by verifying its
Eunji Jeong, Geunseon Park, Jinyoung Kim, Sojeong Lee, Chaewon Park, Jong‐Woo Lim, Minjoo Yeom, Daesub Song, Seungjoo Haam   +8 more
wiley   +1 more source

Far-infrared constraints on the contamination by dust-obscured galaxies of high-z dropout searches [PDF]

, 2011
The spectral energy distributions (SED) of dusty galaxies at intermediate redshift may look similar to very high-redshift galaxies in the optical/near infrared (NIR) domain.
Blain, A. W., Boone, F.
core