Results 51 to 60 of about 2,016,170 (332)

Faint dwarf spheroidals in the Fornax Cluster: A flat luminosity function

open access: yes, 2002
We have discovered about 70 very faint dwarf galaxies in the Fornax Cluster. These dSphs candidates follow the same magnitude-surface brightness relation as their counterparts in the Local Group, and even extend it to fainter limits.
Armandroff   +27 more
core   +1 more source

Space Brightness Evaluation for a Daylit Room

open access: yesi-Perception, 2011
One of the most important problems for lighting design is how to reduce an electric energy. One way to solve this problem is use of daylight, but little is known how to perceive a brightness of a room illuminated by daylight come in through a window and ...
Takashi Maruyama   +2 more
doaj   +1 more source

Not all continuous dimensions map equally: number-brightness mapping in human infants. [PDF]

open access: yesPLoS ONE, 2013
Evidence for spontaneous mappings between the dimensions of number and length, time and length, and number and time, has been recently described in preverbal infants.
Maria Dolores de Hevia   +1 more
doaj   +1 more source

EXTREME BRIGHTNESS TEMPERATURES AND REFRACTIVE SUBSTRUCTURE IN 3C 273 WITH RADIOASTRON [PDF]

open access: yes, 2016
Earth–space interferometry with RadioAstron provides the highest direct angular resolution ever achieved in astronomy at any wavelength. RadioAstron detections of the classic quasar 3C 273 on interferometric baselines up to 171,000 km suggest brightness ...
Michael D. Johnson   +10 more
semanticscholar   +1 more source

Transform-limited X-ray pulse generation from a high-brightness self-amplified spontaneous-emission free-electron laser [PDF]

open access: yes, 2012
A method to achieve high-brightness self-amplified spontaneous emission (HB-SASE) in the free-electron laser (FEL) is described. The method uses repeated nonequal electron beam delays to delocalize the collective FEL interaction and break the radiation ...
A. M. Kondratenko   +7 more
core   +2 more sources

OUTBURST DECLINE OF SLOW NOVA RT SERPENTIS (1909) FROM 1940 TO 1993.

open access: yesOdessa Astronomical Publications, 2017
We present observations of the Nova RT Ser (1909) from 1940 to 1978 (pbotograhic magnitudes) and from 1983 to 1993 (B, V, R). Light variations with typical time of 10 years have been detected.
V. V. Bochkov   +2 more
doaj   +1 more source

Gaia Data Release 2. Summary of the contents and survey properties [PDF]

open access: yes, 2018
We present the second Gaia data release, Gaia DR2, consisting of astrometry, photometry, radial velocities, and information on astrophysical parameters and variability, for sources brighter than magnitude 21.
A. Brown   +452 more
semanticscholar   +1 more source

A MegaCam Survey of Outer Halo Satellites. VII. A Single S\'ersic Index v/s Effective Radius Relation for Milky Way Outer Halo Satellites

open access: yes, 2019
In this work we use structural properties of Milky Way's outer halo ($R_G > 25\,\mathrm{kpc}$) satellites (dwarf spheroidal galaxies, ultra-faint dwarf galaxies and globular clusters) derived from deep, wide-field and homogeneous data, to present ...
Carballo-Bello, Julio A.   +8 more
core   +1 more source

Exploiting metabolic adaptations to overcome dabrafenib treatment resistance in melanoma cells

open access: yesMolecular Oncology, EarlyView.
We show that dabrafenib‐resistant melanoma cells undergo mitochondrial remodeling, leading to elevated respiration and ROS production balanced by stronger antioxidant defenses. This altered redox state promotes survival despite mitochondrial damage but renders resistant cells highly vulnerable to ROS‐inducing compounds such as PEITC, highlighting redox
Silvia Eller   +17 more
wiley   +1 more source

Brilliant X-rays using a Two-Stage Plasma Insertion Device

open access: yesScientific Reports, 2017
Particle accelerators have made an enormous impact in all fields of natural sciences, from elementary particle physics, to the imaging of proteins and the development of new pharmaceuticals.
J. A. Holloway   +8 more
doaj   +1 more source

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