Results 61 to 70 of about 102,046 (339)

Direct Recycling of Cold Work Tool Steel Swarf into New Cutting Disks via Field‐Assisted Sintering

Advanced Engineering Materials, EarlyView.
Through a sintering method known as field‐assisted sintering technology/spark plasma sintering, cold work tool steel swarf can be directly recycled into new cutting disks. This method is capable of densifying the unconventional powder morphology of swarf, and it can also seal grinding contaminants, such as Al2O3, into the steel matrix.
Monica Keszler, Felix Großwendt, Olivier Guillon, Sebastian Weber, Martin Bram   +4 more
wiley   +1 more source

On the Signature of Black Holes on the Quenched Stellar Mass Function

The Astrophysical Journal
As star-forming galaxies approach or exceed a stellar mass of around 10 ^11 M _⊙ , they are increasingly likely to be quenched in a process generically called mass quenching.
Antonio J. Porras-Valverde, John C. Forbes   +1 more
doaj   +1 more source

Powerful jets from accreting black holes: evidence from the optical and infrared

, 2010
A common consequence of accretion onto black holes is the formation of powerful, relativistic jets that escape the system. In the case of supermassive black holes at the centres of galaxies this has been known for decades, but for stellar-mass black ...
Fender, R. P., Russell, D. M.
core   +1 more source

Timing the starburst-AGN connection [PDF]

, 2010
The mass of super massive black holes at the centre of galaxies is tightly correlated with the mass of the galaxy bulges which host them. This observed correlation implies a mechanism of joint growth, but the precise physical processes responsible are a ...
Charlot, Stephane, Heckman, Timothy, Wild, Vivienne   +2 more
core   +1 more source

Supercritically accreting stellar mass black holes as ultraluminous X-ray sources [PDF]

, 2006
We derive the luminosity‐temperature relation for the supercritically accreting black holes (BHs) and compare it to the data on ultraluminous X-ray sources (ULXs). At super-Eddington accretion rates, an outflow forms within the spherization radius.
J. Poutanen, G. Lipunova, S. Fabrika, A. Butkevich, P. Abolmasov   +4 more
semanticscholar   +1 more source

Efficient and Scalable Radiative Cooling for Photovoltaics Using Solution‐Processable and Solar‐Transparent Mesoporous Nanoparticles

Advanced Functional Materials, EarlyView.
Graded refractive index (GRI) structures are prepared from the layer‐by‐layer spray coating of the mesoporous SiO2 nanoparticles, showing high solar transparency and thermal emissivity. Under outdoor conditions, after 50 days, the GRI‐coated photovoltaics show on average 6.65 ± 1.48 °C lower than that of the non‐coated references, maintaining 80.9 ± 8 ...
Heesuk Jung, Sung Yoon Min, Byungsoo Kang, Yongseok Yoo, Jihun Jang, Yeoun‐Woo Jang, Hyojeong Choi, Hyeong Won Lee, Swarup Biswas, Yongju Lee, Mansoo Choi, Phillip Lee, Min Seok Jang, Hyeok Kim, Shu Yang   +14 more
wiley   +1 more source

Partial Tidal Disruptions of Main-sequence Stars by Intermediate-mass Black Holes

The Astrophysical Journal, 2023
We study close encounters of a 1 M _⊙ middle-age main-sequence star (modeled using MESA) with massive black holes through hydrodynamic simulations, and explore in particular the dependence of the outcomes on the black hole mass.
Fulya Kıroğlu, James C. Lombardi Jr., Kyle Kremer, Giacomo Fragione, Shane Fogarty, Frederic A. Rasio   +5 more
doaj   +1 more source

Two stellar-mass black holes in the globular cluster M22 [PDF]

Nature, 2012
Hundreds of stellar-mass black holes probably form in a typical globular star cluster, with all but one predicted to be ejected through dynamical interactions.
J. Strader, L. Chomiuk, T. Maccarone, J. Miller-Jones, A. Seth   +4 more
semanticscholar   +1 more source

Removing Homocoupling Defects in Alkoxy/Alkyl‐PBTTT Enhances Polymer:Fullerene Co‐Crystal Formation and Stability

Advanced Functional Materials, EarlyView.
PBTTT‐OR‐R, a C14‐alkoxy/alkyl‐PBTTT polymer derivative, is of substantial interest for optoelectronics due to its specific fullerene intercalation behavior and enhanced charge‐transfer absorption. Comparing this polymer with (S) and without (O) homocoupling defects reveals that PBTTT‐OR‐R(O) forms stable co‐crystals with PC61BM, while PBTTT‐OR‐R(S ...
Zhen Liu, Jochen Vanderspikken, Paola Mantegazza, Stefania Moro, Mouna Hamid, Sigurd Mertens, Niko Van den Brande, Laurence Lutsen, Vincent Lemaur, David Beljonne, Giovanni Costantini, Koen Vandewal, Bruno Van Mele, Wouter Maes, Bart Goderis   +14 more
wiley   +1 more source

Why are AGN found in High Mass Galaxies?

, 2008
We use semi-analytic models implemented in the Millennium Simulation to analyze the merging histories of dark matter haloes and of the galaxies that reside in them.
Barger, Bower, Boylan-Kolchin, Colless, Croton, De Lucia, De Lucia, De Lucia, Duschl, Ferrarese, Gebhardt, Guinevere Kauffmann, Haehnelt, Hasan, Hasinger, Heckman, Ho, Hopkins, Hopkins, Hopkins, Jiang, Kang, Kauffmann, Kauffmann, Kormendy, Lan Wang, Li, Magorrian, McCarthy, Merloni, Mihos, Richards, Spergel, Springel, Springel, Steffen, Volonteri, Wang, Weinmann, Wyithe, Zheng   +40 more
core   +1 more source