Results 71 to 80 of about 36,135 (283)

Properties of mm galaxies: Constraints from K-band blank fields [PDF]

, 2002
We have used the IRAM Plateau de Bure mm interferometer to locate with subarcsecond accuracy the dust emission of three of the brightest 1.2mm sources in the NTT Deep Field (NDF) selected from our 1.2mm MAMBO survey at the IRAM 30m telescope.
Arnouts S., Baade D., Baade D., Bertoldi F., C. Carilli, D. Lutz, Devillard N., Downes D., F. Bertoldi, Gispert R., Guilloteau S., H. Dannerbauer, K. Menten, L. Tacconi, M. D. Lehnert, Moorwood A., Persic M., R. Genzel, Sanders D. B., Soucail G.   +19 more
core   +4 more sources

Optimal Image Reconstruction in Radio Interferometry [PDF]

The Astrophysical Journal Supplement Series, 2006
We introduce a method for analyzing radio interferometry data which produces maps which are optimal in the Bayesian sense of maximum posterior probability density, given certain prior assumptions. It is similar to maximum entropy techniques, but with an exact accounting of the multiplicity instead of the usual approximation involving Stirling's formula.
Sutton, Edmund C., Wandelt, Benjamin D.
openaire   +2 more sources

Quantitative Stain Mapping in X‐Ray Virtual Histology

Advanced Science, EarlyView.
Virtual histology promises 3D tissue examination without physical sectioning, yet has lacked the tissue‐specificity of conventional pathology. This work demonstrates the first quantitative three‐dimensional stain mapping at histologically relevant resolution, separating contrast agent from tissue to reveal cellular features such as nuclei. The approach
Dominik John, David M. Paganin, Marie‐Christine Zdora, Lisa Marie Petzold, Patrick Ilg, Junan Chen, Sara Baggio, Johannes B. Thalhammer, Sami Wirtensohn, Julian Moosmann, Jörg U. Hammel, Felix Beckmann, Samantha J. Alloo, Jannis N. Ahlers, Madleen Busse, Julia Herzen, Kaye S. Morgan   +16 more
wiley   +1 more source

Applications of the Irbene Single-Baseline Radio Interferometer

Galaxies
The Irbene single-baseline radio interferometer (ISBI), operated by the Ventspils International Radio Astronomy Centre (VIRAC), offers a rare and versatile configuration in modern radio astronomy.
Ivar Shmeld, Vladislavs Bezrukovs, Jānis Šteinbergs, Karina Šķirmante, Artis Aberfelds, Sergey A. Belov, Ross A. Burns, Dmitrii Y. Kolotkov, Valery M. Nakariakov, Dmitrijs Bezrukovs, Matīss Purviņš, Aija Kalniņa, Arturs Orbidans, Marcis Bleiders, Marina Konuhova   +14 more
doaj   +1 more source

Determining the Jet Poloidal B Field and Black-Hole Rotation Directions in AGNs

Galaxies, 2018
It is theoretically expected that active galactic nucleus (AGN) jets should carry helical magnetic (B) fields, which arise due to the rotation of the central black hole and accretion disk combined with the jet outflow.
Denise Gabuzda
doaj   +1 more source

Search for Compact Extragalactic Radio Sources Near Massive Star Forming Regions [PDF]

, 2006
We have used the Very Large Array to search for compact milliarcsecond-size radio sources near methanol masers in high-mass star-forming regions. Such sources are required for Very Long Baseline Interferometry phase-referencing observations. We conducted
K. M. Menten, M. J. Reid, X. W. Zheng, Y. Xu, Zhang J. S.   +4 more
core   +2 more sources

Label‐Free and Immobilization‐Free Protein‐Binding Assays by Ultraviolet Transient Absorption Microscopy

Advanced Science, EarlyView.
A femtosecond UV pump–probe microscope resolves binding‐induced changes in protein excited‐state dynamics and converts these intrinsic contrasts into an equilibrium affinity readout. By probing tryptophan responses directly in solution, the approach enables quantitative determination of dissociation constants without labeling or immobilization ...
Jianghao Shen, Qiangqiang Wang, Fan Wu, Yang Gao, Lu Lan, Pu Wang   +5 more
wiley   +1 more source

The CHILES Continuum and Polarization Survey. I. Survey Design and Noise Characterization

The Astronomical Journal
We introduce and describe the CHILES Continuum and Polarisation (CHILES Con Pol) Survey, a 1000 hr 1.4 GHz wideband full polarization radio continuum deepfield with the Very Large Array, commensurate with the CHILES H i deepfield.
Nicholas M. Luber, Min S. Yun, Hansung B. Gim, Daniel Krista-Kelsey, D.J. Pisano, Emmanuel Momjian, Chris Hales   +6 more
doaj   +1 more source

18–22 cm VLBA Observational Evidence for Toroidal B-Field Components in Six AGN Jets

Galaxies, 2016
The formation of relativistic jets in Active Galactic Nuclei (AGN) is related to accretion onto their central supermassive black holes, and magnetic (B) fields are believed to play a central role in launching, collimating, and accelerating the jet ...
Juliana Cristina Motter, Denise Carmen Gabuzda   +1 more
doaj   +1 more source

Very Long Baseline Array Imaging of Parsec-scale Radio Emissions in Nearby Radio-quiet Narrow-line Seyfert 1 Galaxies [PDF]

, 2013
We conducted Very Long Baseline Array (VLBA) observations of seven nearby narrow-line Seyfert 1 (NLS1) galaxies at 1.7 GHz (18cm) with milli-arcsecond resolution. This is the first systematic very long baseline interferometry (VLBI) study focusing on the
Asada, Keiichi, Doi, Akihiro, Fujisawa, Kenta, Hagiwara, Yoshiaki, Inoue, Makoto, Nagai, Hiroshi, Wajima, Kiyoaki   +6 more
core   +2 more sources