Results 81 to 90 of about 38,366 (276)

HST and LAMOST discover a dual active galactic nucleus in J0038+4128

, 2014
We report the discovery of a kiloparsec-scale dual active galactic nucleus (AGN) in J0038+4128. From the Hubble Space Telescope (HST) Wide Field Planetary Camera (WFPC2) images, we find two optical nuclei with a projection separation of 4.7 kpc (3.44 ...
Hou, Y. -H., Huang, Y., Huo, Z. -Y., Jin, G., Liu, X. -W., Xiang, M. -S., Yuan, H. -B., Zhang, Y., Zhou, X. -L.   +8 more
core   +1 more source

The fast UV variability of the active galactic nucleus in Fairall 9

, 2014
We present results from a new optical/UV/X-ray monitoring campaign of the luminous Seyfert galaxy Fairall 9 using the Swift satellite. Using the UV-Optical Telescope (UVOT) on Swift, we find correlated optical/UV variability on all time scales ranging ...
Lohfink, Anne, Miller, Neal, Mushotzky, Richard, Reynolds, Christopher, Vasudevan, Ranjan   +4 more
core   +1 more source

‘Mere Amateurs’? Elementary Teachers and the Making of Scientific Authority in the British Child Study Movement

History, EarlyView.
Abstract This article offers new perspectives on the relationship between elementary teaching, scientific expertise and the professionalization of the human sciences. Previous scholarship has demonstrated the ready existence of ‘amateur’ science societies in the nineteenth century where cross‐class exchanges were common.
Julia Gustavsson
wiley   +1 more source

Tracking X-Ray Variability in Next-generation EHT Low-luminosity Active Galactic Nucleus Targets

The Astrophysical Journal
We present a 5 month NICER X-ray monitoring campaign for two low-luminosity active galactic nuclei (LLAGNs)—NGC 4594 and IC 1459—with complementary Swift and NuSTAR observations.
Nicole M. Ford, Michael Nowak, Venkatessh Ramakrishnan, Daryl Haggard, Kristen Dage, Dhanya G. Nair, Chi-kwan Chan   +6 more
doaj   +1 more source

Calorimetry of Active Galactic Nucleus jets: testing plasma composition in Cygnus A

, 2012
We examine plasma composition of jets in active galactic nuclei through the comparison of the total pressure ($P$) with partial pressures of electrons and protons in a cocoon.
Amato, Arnaud, Asano, Asano, Atoyan, Bach, Bach, Blandford, Blundell, Bîrzan, Cavagnolo, Croston, De Young, Dermer, F. Takahara, Garrington, Georganopoulos, Ghisellini, Godfrey, Hardcastle, Harris, Hirotani, Hirotani, Hirotani, Homan, Ichimaru, Isobe, Isobe, Ito, Iwamoto, Iwamoto, Kataoka, Kellermann, Kino, Kirk, Krichbaum, Lazio, Lister, Lister, M. Kino, McKinney, Mehta, Mizuta, N. Kawakatu, Perlman, Quataert, Rachen, Rafferty, Reynolds, Ruszkowski, Scheuer, Sikora, Sironi, Smith, Spitkovsky, Stawarz, Tashiro, Tashiro, Thompson, Uchiyama, Watanabe, Wilson, Wilson, Yaji, Yamasaki   +64 more
core   +1 more source

Ecology in Hartmut Rosa's Theory of Resonance: A Four‐Level Reconstruction

Dialog, EarlyView.
ABSTRACT This article discusses Hartmut Rosa's sociological theory of resonance with special emphasis on religion and ecology. In Rosa, resonance experiences refer to (always) participatory and (normally) enlivening world relations. I argue that Rosa's resonance theory is multi‐pronged and covers at least three interconnected levels.
Niels Henrik Gregersen
wiley   +1 more source

Discovery of a Gas-enshrouded Broad-line Active Galactic Nucleus at z ∼ 7

The Astrophysical Journal Letters
The Ly α absorption profile in star-forming galaxies serves as a powerful tracer of the extended, dense neutral hydrogen in their surroundings during the Epoch of Reionization (EoR).
Qianqiao Zhou, Xin Wang, Hang Zhou, Emanuele Daddi, Luis C. Ho, Shengzhe Wang, Ruancun Li, Zuyi Chen, Cheng Cheng, Xihan Ji, Yuxuan Pang, Mengting Ju   +11 more
doaj   +1 more source

Discovery of a dual active galactic nucleus with ∼8 kpc separation [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2017
Abstract Targeted searches for dual active galactic nuclei (AGNs), with separations 1–10 kpc, have yielded relatively few successes. A recent pilot survey by Satyapal et al. has demonstrated that mid-infrared (mid-IR) pre-selection has the potential to significantly improve the success rate for dual AGN confirmation in late stage galaxy ...
Ellison, S., Secrest, N., Mendel, J., Satyapal, S., Simard, L.   +4 more
openaire   +3 more sources

Winter‐active spiders (Clubiona) have a hyperactive antifreeze protein with a unique beta‐solenoid fold

The FEBS Journal, EarlyView.
Antifreeze proteins from winter‐active spiders were purified using their affinity for ice. After LC–MSMS characterization, corresponding transcripts were identified. The antifreeze protein folds as a β‐solenoid with a large flat ice‐binding site on one surface and can bind to ice crystals and prevent their growth at −4 °C.
Laurie A. Graham, Stano Pekár, Ina M. Hainer, Peter L. Davies   +3 more
wiley   +1 more source

A Relativistic Jet in the Radio-quiet Active Galactic Nucleus Mrk 110

The Astrophysical Journal Letters
We report the discovery of a relativistic jet in Mrk 110, a narrow-line Seyfert 1 galaxy historically classified as a radio-quiet active galactic nucleus (AGN).
Ailing Wang, Tao An, Kenneth I. Kellermann, Hua Feng, Emmanuel K. Bempong-Manful, Roland Timmerman, Shaoguang Guo   +6 more
doaj   +1 more source