Results 31 to 40 of about 102,749 (268)

Dust-obscured Galaxies with Broken Power-law Spectral Energy Distributions Discovered by UNIONS

The Astrophysical Journal
We report on the spectral energy distributions (SEDs) of infrared (IR)-bright dust-obscured galaxies (DOGs) with ( i − [22]) _AB ≥ 7.0. Using photometry from the deep and wide Ultraviolet Near-Infrared Optical Northern Survey, combined with near-IR (NIR)
Taketo Yoshida, Tohru Nagao, Yoshiki Toba, Akatoki Noboriguchi, Kohei Ichikawa, Hendrik Hildebrandt, Naomichi Yutani, Kenneth C. Chambers, Ryo Iwamoto, Seira Kobayashi, Masamune Oguri, Ken Osato, Kohei Shibata, Yuxing Zhong   +13 more
doaj   +1 more source

Discovery of a soft X-ray lag in the tidal disruption event AT2021ehb

Astronomy & Astrophysics
In this Letter, we report the detection of soft X-ray time lags – i.e., variability in the softer photons lagging behind that in the harder photons – in seven XMM–Newton observations of the tidal disruption event (TDE) candidate AT2021ehb.
Zhang Wenjie
doaj   +1 more source

The Photometric and Spectroscopic Properties of Remnant and Restarted Radio Galaxies in the Lockman Hole Field

Galaxies, 2021
Radio galaxies are known to undergo phases of activity, where the stage after the jets have switched off is referred to as the remnant phase. This state can be followed by a restarted phase when the activity reignites. Remnant and restarted radio sources
Nika Jurlin, Raffaella Morganti, Natasha Maddox, Marisa Brienza   +3 more
doaj   +1 more source

The First Hour of Extra-galactic Data of the Sloan Digital Sky Survey Spectroscopic Commissioning: The Coma Cluster

, 2001
On 26 May 1999, one of the Sloan Digital Sky Survey (SDSS) fiber-fed spectrographs saw astronomical first light. This was followed by the first spectroscopic commissioning run during the dark period of June 1999.
Adami C., Adami C., Adrian Pope, Alan Uomoto, Alex Szalay, Andrew J. Connolly, Aniruddha R. Thakar, Aronne Merrelli, Avery Meiksin, Brian Yanny, Briel U. G., Chris Stoughton, Christopher Stubbs, Christy Tremonti, Constance M. Rockosi, Daniel C. Long, David J. Schlegel, Donald G. York, Donald P. Schneider, Donald Q. Lamb, Eric J. Hilton, Fioc M., Folkes S. R., Francisco J. Castander, Galaz G., Godwin J. G., Gyula P. Szokoly, Harvey MacGillivray, István Csabai, James Annis, James E. Gunn, James H. Crocker, Jeffrey A. Munn, Jeffrey R. Pier, John E. Anderson, Jon Brinkmann, Jon Loveday, Joshua A. Frieman, Larry Carey, Larry Starkman, Mamoru Doi, Mark SubbaRao, Masataka Fukugita, Matt Newcomb, Mittaz J. P. D., Neta A. Bahcall, Patrick Waddell, R. French Leger, Rana N. C., Robert B. Hindsley, Robert C. Nichol, Robert H. Lupton, Russell Owen, Sadanori Okamura, Scott Burles, Scott D. Friedman, Sodre L., Stephen Smee, Steve Kent, Walter Seigmund, White S. D. M., William N. Boroski, Yehuda Snir, Željko Ivezić   +63 more
core   +1 more source

Controlling 3D Contractility via Engineered Fibrous Hydrogel Composites

Advanced Functional Materials, EarlyView.
A tunable composite contractile assembly (CCA) is developed that can permit or resist contraction without changing cell‐adhesion and density, unlike collagen whose inherent coupling of these ECM cues limits its use as a platform in contractility studies.
Karen L. Xu, Yuqi Zhang, Alysse DeFoe, Georgios Kotsaris, Brendan Stoeckl, Matthew D. Davidson, Jason A. Burdick, Robert L. Mauck   +7 more
wiley   +1 more source

Narrow-line Seyfert 1 Galaxies and the M_BH - sigma Relation

, 2007
We have studied the location of narrow-line Seyfert 1 (NLS1) galaxies and broad-line Seyfert 1 (BLS1) galaxies on the M_BH - sigma relation of non-active galaxies.
D. Xu, Ferrarese L., S. Komossa, Silk J.
core   +1 more source

Self‐Powered Flexible Triboelectric‐Gated Ion‐Gel Transistor for Neuromorphic Tactile Sensing and Human Activity Recognition

Advanced Materials, EarlyView.
A fully flexible ion‐gel‐gated graphene‐channel transistor driven by a triboelectric nanogenerator enables self‐powered tactile sensing and synaptic learning. Mimicking spike‐rate‐dependent plasticity, the device exhibits frequency‐selective potentiation and depression, supporting rate‐coded neuromorphic computation even under flex.
Hanseong Cho, Seoyeon Park, Youngmin Lee, Sejoon Lee   +3 more
wiley   +1 more source

A Census of Photometrically Selected Little Red Dots at 4 < z < 9 in JWST Blank Fields

The Astrophysical Journal
Observations with the James Webb Space Telescope (JWST) have uncovered numerous faint active galactic nuclei (AGN) at z ∼ 5 and beyond. These objects are key to our understanding of the formation of supermassive black holes (SMBHs), their coevolution ...
Vasily Kokorev, Karina I. Caputi, Jenny E. Greene, Pratika Dayal, Maxime Trebitsch, Sam E. Cutler, Seiji Fujimoto, Ivo Labbé, Tim B. Miller, Edoardo Iani, Rafael Navarro-Carrera, Pierluigi Rinaldi   +11 more
doaj   +1 more source

Long slit spectroscopy of a sample of isolated spirals with and without an AGN

, 2003
We present the kinematical data obtained for a sample of active (Seyfert) and non active isolated spiral galaxies, based on long slit spectra along several position angles in the Halpha line region and, in some cases, in the Ca triplet region as well ...
Courteau, E. Pérez, Emsellem, F. Durret, Ho, Hunt, Héraudeau, I. Márquez, J. Masegosa, J. Maza, J. Varela, Kauffmann, Kollatschny, M. Moles, M. Roth, Martini, McLure, Moles, Márquez, Márquez, Márquez, Márquez, Márquez, Persic, Pogge, Prada, Pérez, R. M. González Delgado, Schommer, Véron-Cetty   +29 more
core   +3 more sources

Radio Loud AGNs are Mergers [PDF]

, 2015
We measure the merger fraction of Type 2 radio-loud and radio-quiet active galactic nuclei at z>1 using new samples. The objects have HST images taken with WFC3 in the IR channel.
Chiaberge, Marco, Gilli, Roberto, Lotz, Jennifer, Norman, Colin   +3 more
core   +2 more sources