Results 21 to 30 of about 210,357 (290)
Symposium - International Astronomical Union, 1997 Among all spectral bands, the ultraviolet has long been neglected, despite the advantage of small space experiments: the sky is very dark, thus detection of faint objects does not compete against an enhanced background (O'Connell 1987) and the telescope construction techniques are very similar (at least longward of ∼50 nm) to those of optical astronomy.
openaire +2 more sources
Cross-correlation cosmography with HI intensity mapping [PDF]
, 2015 The cross-correlation of a foreground density field with two different background convergence fields can be used to measure cosmographic distance ratios and constrain dark energy parameters.
Bacon, David +2 more
core +3 more sources
Hunting Gamma-Ray-emitting FR0 Radio Galaxies in Wide-field Sky Surveys
The Astrophysical Journal, 2023 The latest entry in the jetted active galactic nuclei (AGN) family is the Fanaroff–Riley type 0 (FR0) radio galaxies. They share several observational characteristics, e.g., nuclear emission and host galaxy morphology, with FR I sources; however, they ...
Meghana Pannikkote +2 more
doaj +1 more source
Some Pattern Recognition Challenges in Data-Intensive Astronomy [PDF]
, 2006 We review some of the recent developments and challenges posed by the data analysis in modern digital sky surveys, which are representative of the information-rich astronomy in the context of Virtual Observatory.
Djorgovski, S. G. +6 more
core +2 more sources
Infrared composition of the Large Magellanic Cloud
Earth, Planets and Space, 2013 The evolution of galaxies and the history of star formation in the Universe are among the most important topics in today’s astrophysics. Especially, the role of small, irregular galaxies in the star-formation history of the Universe is not yet clear ...
M. Siudek +5 more
doaj +1 more source
Six More Ultra-faint Milky Way Companions Discovered in the DECam Local Volume Exploration Survey
The Astrophysical Journal, 2023 We report the discovery of six ultra-faint Milky Way satellites identified through matched-filter searches conducted using Dark Energy Camera (DECam) data processed as part of the second data release of the DECam Local Volume Exploration (DELVE) survey ...
W. Cerny +33 more
doaj +1 more source
New SETI Sky Surveys for Radio Pulses
, 2010 Berkeley conducts 7 SETI programs at IR, visible and radio wavelengths. Here we review two of the newest efforts, Astropulse and Fly's Eye. A variety of possible sources of microsecond to millisecond radio pulses have been suggested in the last several
Andrew Siemion +17 more
core +1 more source
60 Microlensing Events from the Three Years of Zwicky Transient Facility Phase One
The Astrophysical Journal, 2023 Microlensing events have historically been discovered throughout the Galactic bulge and plane by surveys designed solely for that purpose. We conduct the first multiyear search for microlensing events on the Zwicky Transient Facility (ZTF), an all-sky ...
Michael S. Medford +4 more
doaj +1 more source
Optical Synoptic Telescopes: New Science Frontiers
, 2010 Over the past decade, sky surveys such as the Sloan Digital Sky Survey have proven the power of large data sets for answering fundamental astrophysical questions.
Tyson, J. Anthony
core +1 more source
DELVE 6: An Ancient, Ultra-faint Star Cluster on the Outskirts of the Magellanic Clouds
The Astrophysical Journal Letters, 2023 We present the discovery of DELVE 6, an ultra-faint stellar system identified in the second data release of the DECam Local Volume Exploration (DELVE) survey. Based on a maximum-likelihood fit to its structure and stellar population, we find that DELVE 6
W. Cerny +26 more
doaj +1 more source