Results 91 to 100 of about 4,398,607 (320)

A TWO-PARAMETER MODEL FOR THE INFRARED/SUBMILLIMETER/RADIO SPECTRAL ENERGY DISTRIBUTIONS OF GALAXIES AND ACTIVE GALACTIC NUCLEI [PDF]

, 2014
A two-parameter semi-empirical model is presented for the spectral energy distributions of galaxies with contributions to their infrared–submillimeter–radio emission from both star formation and accretion disk-powered activity.
D. Dale, G. Helou, G. Magdis, L. Armus, T. Díaz-Santos, Yong Shi   +5 more
semanticscholar   +1 more source

A Review of Ga₂O₃ Heterojunctions for Deep‐UV Photodetection: Current Progress, Methodologies, and Challenges

Advanced Electronic Materials, EarlyView.
This paper provides a comprehensive review of the existing literature related to the fundamentals of gallium oxide (Ga2O3), growth methods, substrates, and particularly a focused examination of Ga2O3‐based heterojunctions. Particular attention has also been given to the state‐of‐the‐art Ga2O3‐based heterojunctions for photodetectors. The key challenges
Alfred Moore, Saqib Rafique, Ciaran Llewelyn, Dan Lamb, Lijie Li   +4 more
wiley   +1 more source

Are There Higher Electron Densities in Narrow Emission Line Regions of Type-1 AGNs than in Type-2 AGNs?

The Astrophysical Journal
In the manuscript, we check properties of electron densities n _e traced by flux ratio R _sii of [S ii ] λ 6716 Å to [S ii ] λ 6731 Å in narrow emission line regions (NLRs) between Type-1 active galactic nucleus (AGN) and Type-2 AGN in SDSS Data Release ...
XueGuang Zhang
doaj   +1 more source

The Relation Between Activity and Environment in Compact Groups of Galaxies [PDF]

, 2000
We present the results of the classification of spectral activity types for 193 galaxies from a new sample of 49 compact groups of galaxies in the southern hemisphere (SCGs). This sample was selected in automated fashion from a digitized galaxy catalogue, covering an area of ~5200 sq deg, around the South Galactic Pole.
arxiv   +1 more source

EXPLORING THE LOW-MASS END OF THE MBH–σ* RELATION WITH ACTIVE GALAXIES [PDF]

, 2011
We present new measurements of stellar velocity dispersions, using spectra obtained with the Keck Echellette Spectrograph and Imager (ESI) and the Magellan Echellette (MagE), for 76 Seyfert 1 galaxies from the recent catalog of Greene & Ho. These objects
T. Xiao, A. Barth, J. Greene, L. Ho, M. Bentz, R. R. Ludwig, Yanfei Jiang   +6 more
semanticscholar   +1 more source

Radiation Hardened Infrared Photodetectors Based on a Narrow Bandgap Conjugated Polymer Semiconductor

Advanced Electronic Materials, EarlyView.
A blackbody‐sensitive infrared photodetector comprised of an open‐shell conjugated polymer demonstrates high sensitivity without cooling and exceptional radiation hardness, surpassing inorganic compound semiconductor devices. This functionality, inherent to the polymer semiconductor, provides a new frontier for low‐cost, size, weight, and power space ...
Anthony R. Benasco, Chih‐Ting Liu, Bernie Rax, Giacomo Mariani, Steve McClure, Tyler Bills, Sanyukta Datta Gupta, Mohammad I. Vakil, Stefan Nikodemski, Jarrett H. Vella, Jason D. Azoulay   +10 more
wiley   +1 more source

AGN STORM 2. VIII. Investigating the Narrow Absorption Lines in Mrk 817 Using HST-COS Observations

The Astrophysical Journal
We observed the Seyfert 1 galaxy Mrk 817 during an intensive multiwavelength reverberation mapping campaign for 16 months. Here, we examine the behavior of narrow UV absorption lines seen in the Hubble Space Telescope/Cosmic Origins Spectrograph spectra,
Maryam Dehghanian, Nahum Arav, Gerard A. Kriss, Missagh Mehdipour, Doyee Byun, Gwen Walker, Mayank Sharma, Aaron J. Barth, Misty C. Bentz, Benjamin D. Boizelle, Michael S. Brotherton, Edward M. Cackett, Elena Dalla Bontà, Gisella De Rosa, Gary J. Ferland, Carina Fian, Alexei V. Filippenko, Jonathan Gelbord, Michael R. Goad, Keith Horne, Yasaman Homayouni, Dragana Ilić, Michael D. Joner, Erin A. Kara, Shai Kaspi, Christopher S. Kochanek, Kirk T. Korista, Peter Kosec, Andjelka B. Kovačević, Hermine Landt, Collin Lewin, Ethan R. Partington, Luka Č. Popović, Daniel Proga, Daniele Rogantini, Matthew R. Siebert, Thaisa Storchi-Bergmann, Marianne Vestergaard, Timothy. Waters, Jian-Min Wang, Fatima Zaidouni, Ying Zu   +41 more
doaj   +1 more source

Active Dwarf Galaxies as Circumnuclear Regions of LSB-galaxies [PDF]

arXiv, 2006
Some arguments are brought that often active dwarf galaxies are the circumnuclear regions of LSB-galaxies in fact,rather than an ordinary galaxies.
arxiv  

EVIDENCE FOR WIDE-SPREAD ACTIVE GALACTIC NUCLEUS-DRIVEN OUTFLOWS IN THE MOST MASSIVE z ∼ 1–2 STAR-FORMING GALAXIES [PDF]

, 2014
In this paper, we follow up on our previous detection of nuclear ionized outflows in the most massive (log(M*/M☉) ⩾ 10.9) z ∼ 1–3 star-forming galaxies by increasing the sample size by a factor of six (to 44 galaxies above log(M*/M☉) ⩾ 10.9) from a ...
R. Genzel, N. F. Schreiber, D. Rosario, P. Lang, D. Lutz, E. Wisnioski, E. Wuyts, S. Wuyts, K. Bandara, R. Bender, S. Berta, J. Kurk, J. Mendel, L. Tacconi, D. Wilman, A. Beifiori, G. Brammer, A. Burkert, P. Buschkamp, J. Chan, C. Carollo, R. Davies, F. Eisenhauer, M. Fabricius, M. Fossati, M. Kriek, S. Kulkarni, S. Lilly, C. Mancini, I. Momcheva, T. Naab, E. Nelson, A. Renzini, R. Saglia, R. Sharples, A. Sternberg, S. Tacchella, P. V. Dokkum   +37 more
semanticscholar   +1 more source

Compliant Robotics in Space: A Prospective Review of Soft and Deformable Systems for Space Missions

Advanced Intelligent Systems, EarlyView.
Compliant robots are increasingly becoming integral to space exploration due to their adaptability, flexibility, and lightweight design. This article reviews categories such as soft, reconfigurable, and hyper‐redundant robots and their evolving role in enhancing space missions.
Hamed Rahimi Nohooji, Holger Voos
wiley   +1 more source