Results 61 to 70 of about 38,366 (276)
HST/WFC3 Observations of an Off-Nuclear Superbubble in Arp 220 [PDF]
, 2015 We present a high spatial resolution optical and infrared study of the circumnuclear region in Arp 220, a late-stage galaxy merger. Narrowband imaging using HST/WFC3 has resolved the previously observed peak in H$\alpha$+[NII] emission into a bubble ...
Allen, Mark G. +11 more
core +1 more source
Deep Learning‐Assisted Coherent Raman Scattering Microscopy
Advanced Intelligent Discovery, EarlyView.The analytical capabilities of coherent Raman scattering microscopy are augmented through deep learning integration. This synergistic paradigm improves fundamental performance via denoising, deconvolution, and hyperspectral unmixing. Concurrently, it enhances downstream image analysis including subcellular localization, virtual staining, and clinical ...
Jianlin Liu +4 more
wiley +1 more source
Why (inner) bars are important but not sufficient [PDF]
, 2004 I briefly report on the work conducted to probe the gravitational potential of active and non-active disk galaxies using two-dimensional gas and stellar kinematics, first emphasizing the need to make a distinction between ''fuelling the nucleus'' and ...
Emsellem, Eric
core +1 more source
Gamma-ray active galactic nucleus type through machine-learning algorithms [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 7 pages, 3 figures, 3 tables, accepted for publication in MNRAS.
Hassan, T. +3 more
openaire +2 more sources
Early evolutionary history of the seed
Biological Reviews, EarlyView.ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman +2 more
wiley +1 more source
Retrograde infall of the intergalactic gas onto S-galaxy and activity of galactic nuclei
Open AstronomyWe present the results of numerical simulations focused on the accretion of intergalactic gas onto a gas-rich S-type disc galaxy. Our investigation explores the conditions favouring the emergence of counterrotating stellar and gaseous components within ...
Khrapov Sergey S. +1 more
doaj +1 more source
Warm absorber outflows in radio-loud active galactic nucleus 3C 59
Astronomy & AstrophysicsContext. Both jets and ionized outflows in active galactic nuclei (AGNs) are thought to play important roles in affecting the star formation and evolution of host galaxies, but their relationship is still unclear. Aims.
Wang Yijun +10 more
doaj +1 more source
Observational limits on type 1 active galactic nucleus rate in COSMOS [PDF]
, 2009 We present black hole masses and accretion rates for 182 Type 1 active galactic nuclei (AGNs) in COSMOS. We estimate masses using the scaling relations for the broad H β, Mg ii, and C iv emission lines in the redshift ranges 0.16 < z < 0.88, 1 < z < 2 ...
Bongiorno, Angela +15 more
core
A Hubble Space Telescope Imaging Survey of Nearby Active Glactic Nuclei [PDF]
, 1998 We obtained 500-second F606W WFPC2 images of 256 of the nearest ...
Antonucci R. +9 more
core +2 more sources
UNDERSTANDING DUAL ACTIVE GALACTIC NUCLEUS ACTIVATION IN THE NEARBY UNIVERSE [PDF]
The Astrophysical Journal, 2012 We study the fraction of dual active galactic nuclei (AGNs) in a sample of 167 nearby (z < 0.05), moderate-luminosity, ultra-hard X-ray-selected AGNs from the all-sky Swift Burst Alert Telescope (BAT) survey. Combining new Chandra and Gemini observations together with optical and X-ray observations, we find that the dual AGN frequency at scales
Koss, M. +5 more
openaire +2 more sources