Results 91 to 100 of about 110,927 (295)

Flame Retardant Polyolefins Using Fibers From Leather Waste: Adjusting Extrusion Variables to Balance the Property Profile

Journal of Vinyl and Additive Technology, EarlyView.
Adjusting extrusion variables are a key to balance the flame retardancy and mechanical properties of polyolefin/leather waste fiber composites. ABSTRACT The extrusion processing variables represent a key to the optimal use of additives and thus the development of flame‐retardant polymer composites. Adjusting the property profile, for example, finding a
Guadalupe Sanchez‐Olivares, Sven Brehme, Fausto Calderas, Bernhard Schartel   +3 more
wiley   +1 more source

Impact of Radio-mode Feedback on the Covering Fraction of the Circumgalactic Medium of Quasars

The Astrophysical Journal
Utilizing data from the Low-Frequency Array Two-meter Sky Survey and the Sloan Digital Sky Survey, we assemble a sample of 1469 projected quasar pairs with detected radio emissions from foreground quasars, as well as a control sample of 5846 pairs ...
Wen-Qiang Liang, Zhi-fu Chen, Rui-Jing Lu, Jing Li, Zhe-Geng Chen   +4 more
doaj   +1 more source

A Survey of z~6 Quasars in the SDSS Deep Stripe. II. Discovery of Six Quasars at z_{AB}>21

, 2009
We present the discovery of six new quasars at z~6 selected from the Sloan Digital Sky Survey (SDSS) southern survey, a deep imaging survey obtained by repeatedly scanning a stripe along the celestial equator.
Abazajian, Bertin, Cool, Donald P. Schneider, Elena Malanushenko, Fan, Fan, Fan, Fuyan Bian, Gordon T. Richards, Gunn, Gunn, Hogg, Hopkins, Huan Lin, Ivezić, James Annis, Jiang, Jiang, Kuenley Chiu, Kurk, Kurk, Linhua Jiang, Lupton, Lupton, McGreer, Michael A. Strauss, Mortlock, Pier, Richards, Robert H. Lupton, Schlegel, Sebastian Jester, Shen, Shen, Smith, Spergel, Stoughton, Venemans, Vestergaard, Viktor Malanushenko, Willott, Willott, Willott, Xiaohui Fan, York   +45 more
core   +1 more source

QSO MUSEUM I: a sample of 61 extended Ly α-emission nebulae surroundingz∼ 3 quasars [PDF]

Monthly notices of the Royal Astronomical Society, 2018
Motivated by the discovery of rare enormous Lyman α nebulae (ELAN) around z ∼ 2 quasars, we initiated a long-term campaign with the MUSE/VLT instrument to directly uncover the astrophysics of the gas around quasars.
F. A. Battaia, F. A. Battaia, J. Hennawi, J. Hennawi, J. Prochaska, J. Oñorbe, E. Farina, S. Cantalupo, E. Lusso   +8 more
semanticscholar   +1 more source

A structure for quasars

New Astronomy Reviews, 2000
We propose a simple unifying structure for the inner regions of quasars and AGN. This empirically derived model links together the BALs, the narrow UV/X-ray ionized absorbers, the BELR, and the Compton scattering/fluorescing regions into a single structure. The model also suggests an origin for the large-scale bi-conical outflows.
openaire   +3 more sources

On Quasar Masses and Quasar Host Galaxies [PDF]

The Astrophysical Journal, 1998
Accepted for publication in ApJ Letters, 7 pages, aas2pp4 ...
openaire   +2 more sources

Acute metabolic responses to high‐intensity interval training in men with overweight or obesity: Does the exercise modality matter?

Experimental Physiology, EarlyView.
Abstract This study investigated the acute effects of two isoenergetic high‐intensity interval exercise (HIIE) sessions, running (HIIE‐RUN) and cycling (HIIE‐BIKE), on post‐exercise oxygen consumption (V̇O2${\dot V_{{{\mathrm{O}}_2}}}$), carbon dioxide production (V̇CO2${\dot V_{{\mathrm{C}}{{\mathrm{O}}_2}}}$), substrate oxidation and 24‐h energy ...
Annaëlle Couvert, Mélanie Rance, Eric Doré, Vincent Martin, Duane Beraud, Claire Morel, Bruno Pereira, Antonio Herbert Lancha Junior, Nathalie Boisseau   +8 more
wiley   +1 more source

The Cosmic Ultraviolet Baryon Survey (CUBS). VIII. Group Environment of the Most Luminous Quasars at z ≈ 1

The Astrophysical Journal
We investigate the group-scale environment of 15 luminous quasars (luminosity L _3000 > 10 ^46 erg s ^−1 ) from the Cosmic Ultraviolet Baryon Survey (CUBS) at redshift z ≈ 1.
Jennifer I-Hsiu Li, Sean D. Johnson, Erin Boettcher, Sebastiano Cantalupo, Hsiao-Wen Chen, Mandy C. Chen, David R. DePalma, Zhuoqi (Will) Liu, Nishant Mishra, Patrick Petitjean, Zhijie Qu, Gwen C. Rudie, Joop Schaye, Fakhri S. Zahedy   +13 more
doaj   +1 more source

The Race Between Stars and Quasars in Reionizing Cosmic Hydrogen

, 2009
The cosmological background of ionizing radiation has been dominated by quasars once the Universe aged by ~2 billion years. At earlier times (redshifts z>3), the observed abundance of bright quasars declined sharply, implying that cosmic hydrogen was ...
A. Loeb, A. Loeb, A. Soltan, A.S. Eddington, Abraham Loeb, C.-L. Jiao, C.A. Faucher-Giguère, C.W. Morgan, F. Shankar, F. Shankar, I.D. Novikov, J. Magorrian ., J. Silk, J.A. Kollmeier ., J.L. Tinker ., J.S.B. Wyithe, J.S.B. Wyithe, J.S.B. Wyithe, J.S.B. Wyithe, K. Gebhardt ., L. Ferrarese, M. Dijkstra, M. Dijkstra, M.S. Warren, N. Haring, N.I. Shakura, P.F. Hopkins, R. Shafee, R. Shafee ., R.C. Kennicutt, R.C. Telfer, R.L. White, R.M. O'Leary, R.M. O'Leary, S. Poindexter, S. Tremaine ., S. Tremaine ., S. Wyithe, T. Tanaka, T.R. Lauer ., V. Bromm, WMAP collaboration, Y. Li ., Z. Haiman, Z. Haiman   +44 more
core   +1 more source

A Main Sequence for Quasars [PDF]

Frontiers in Astronomy and Space Sciences, 2018
The last 25 years saw a major step forward in the analysis of optical and UV spectroscopic data of large quasar samples. Multivariate statistical approaches have led to the definition of systematic trends in observational properties that are the basis of
P. Marziani, D. Dultzin, J. Sulentic, A. del Olmo, C. Negrete, M. Martínez–Aldama, M. D’Onofrio, E. Bon, N. Bon, G. Stirpe   +9 more
semanticscholar   +1 more source