Results 31 to 40 of about 117,674 (141)

M-σ relations across cosmic time

open access: yesThe Open Journal of Astrophysics, 2023
Feedback from active galactic nuclei (AGN) has long been invoked to explain the correlation between black hole mass and stellar velocity dispersion (M-σ) discovered in low redshift galaxies. We describe the time evolution of AGN in the M-σ plane based on
David Garofalo   +5 more
doaj   +1 more source

Ideowe korzenie Czarnej Sotni. Recepcja zjawiska. (Ideological Roots of the Black Hundred)

open access: yes, 2021
Ideowe korzenie Czarnej Sotni. Recepcja zjawiska. (Ideological Roots of the Black Hundred) [w:] Na Wschód od linii Curzona (East of the Curzon Line). Pod redakcją Renaty Król-Mazur i Michała Lubiny. Księgarnia Akademicka, Kraków 2014, s.
openaire   +1 more source

The genetic basis of wing spots in Pieris canidia butterflies

open access: yesBMC Genomics, 2023
Spots in pierid butterflies and eyespots in nymphalid butterflies are likely non-homologous wing colour pattern elements, yet they share a few features in common.
Jocelyn Liang Qi Wee   +3 more
doaj   +1 more source

Unraveling the Physics of Quasar Jets: Optical Polarimetry and Implications for the X-ray Emission Process

open access: yesGalaxies, 2020
Since the launch of Chandra twenty years ago, one of the greatest mysteries surrounding Quasar Jets is the production mechanism for their extremely high X-ray luminosity. Two mechanisms have been proposed. In the first view, the X-ray emission is inverse-
Eric S. Perlman   +6 more
doaj   +1 more source

Jewish Self-Defense and Black Hundreds in Zhitomir. A Case Study on the Pogroms of 1905 in Tsarist Russia

open access: yesQuest. Issues in Contemporary Jewish History, 2012
In a case study, this article re-examines three key aspects of the anti-Jewish pogroms of 1905-1906 in Tsarist Russia: the concept of “Black Hundreds” as the major perpetrators, the question of whether state authorities approved pogrom violence, and ...
Stefan Wiese
doaj  

The Book of the Dead

open access: yesParse Journal
My film revisits Muriel Rukeyser’s 1938 poem The Book of the Dead, a documentary work exposing the Hawks Nest Tunnel disaster, in which hundreds of mostly Black workers died of silicosis.
David Kelley
doaj   +1 more source

THE COLOR PATTERN OF ALABIO DUCK (Anas platyrhynchos Borneo) IN SOUTH KALIMANTAN

open access: yesJournal of the Indonesian Tropical Animal Agriculture, 2014
The study was carried to identify the phenotypic variation of Alabio duck (Anas platyrhynchosBorneo) being kept by smallholder. This research was conducted in Hulu Sungai Selatan (HSS), HuluSungai Tengah (HST) and Hulu Sungai Utara (HSU), South ...
S. Suryana   +3 more
doaj   +1 more source

The Use of Binary Black Holes Merging in Active Galactic Nuclei Disks for Hubble Constant Measurements

open access: yesThe Astrophysical Journal
We study the impact of environmental effects on the measurement of the Hubble constant ( H _0 ) from gravitational-wave (GW) observations of binary black hole mergers residing in active galactic nuclei (AGNs) near the central supermassive black hole ...
Guo-Peng Li, Xi-Long Fan
doaj   +1 more source

Stability of black hole accretion disks

open access: yesEPJ Web of Conferences, 2012
We discuss the issues of stability of accretion disks that may undergo the limit-cycle oscillations due to the two main types of thermal-viscous instabilities.
Czerny B.   +3 more
doaj   +1 more source

Two hundred years of Methodism! A black theological inquiry into the heritage of Methodism in Southern Africa 1816-2016 [PDF]

open access: yesStudia Historiae Ecclesiasticae (SHE), 2016
A proverb of the Yoruba people of Nigeria says: ‘However far a stream flows, it never forgets its origin.’ The proverb gives credence to the epochal stories of the human race, and more importantly of the Methodist people in Southern Africa. This article evaluates the history of Methodist people in Southern Africa in the period 1816-2016 from a ...
openaire   +3 more sources

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