Access to the central circulation can be difficult in small infants, particularly when normal anatomic landmarks have been altered. We describe a new technique that utilizes any existing central catheter to establish additional sites of vascular access. A 4 Fr end hole catheter is advanced under fluoroscopic guidance to the desired site of new vascular access. A 10-mm Amplatz snare catheter is ...

An empirical relationship, of particular interest for studies of high redshift active galactic nuclei (AGNs) and quasars, between the masses of their central black-holes and rest-frame ultraviolet (UV) parameters measured in single-epoch AGN spectra is presented. This relationship is calibrated to recently measured reverberation masses of low-redshift AGNs and quasars. An empirical relationship...

The Kerr/CFT correspondence has been recently broadened to the general extremal black holes under the assumption that the central charges from the non-gravitational fields vanish. To confirm this proposal, we derive the expression of the conserved charges in the Einstein-Maxwell-scalar theory with topological terms in four and five dimensions and check that the above assumption was correct. Com...

The globular cluster G1 (Mayall II) in M31 is the most massive (∼10M⊙) stellar cluster in the Local Group, and it has the highest central velocity dispersion (∼28 kms−1). It has been claimed to host a central ∼20,000 M⊙ black hole, but these claims have been controversial. We report here the XMM-Newton detection of X-ray emission from G1 at a level of Lx ≈ 2×1036 ergs−1. This emission could be ...

We consider stationary, axially and equatorially symmetric systems consisting of a central rotating and charged degenerate black hole and surrounding physically realistic matter. We show that a + Q = M always holds, where a = J/M is the black hole’s intrinsic angular momentum per unit mass, Q its electric charge and M the well known black hole mass parameter introduced by Christodoulou and Ruff...

Ban-Yuan Kuo,1 Wu-Cheng Chi,1 Ching-Ren Lin,1,2 Emmy Tsui-Yu Chang,3 John Collins4 and Char-Shine Liu3 1Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan. E-mail: [email protected] 2Institute of Geophysics, National Central University, Chung-Li, Taiwan 3Institute of Oceanography, National Taiwan University, Taipei, Taiwan 4Department of Geology and Geophysics, Woods Hole Oceano...

We show that, unlike the results presented previously in the literature, the transition from an outer Shakura-Sunyaev disk (SSD) to an advectiondominated accretion flow (ADAF) is possible for large values of the viscosity parameter α > 0.5. The transition is triggered by thermal instability of a radiation-pressure-supported SSD. The transition radius is close to the central black hole. We confi...

A brief review is presented on the studies of the hole motion in a two–dimensional quantum antiferromagnet. An extended introduction is given to cover the background of the problem. The quantum Bogoliubov–de Gennes formalism which treats the local distortion of the spin configuration and the quantum renormalization process on an equal footing, is outlined. The latest development on the central ...

Ultralight scalar fields provide an interesting alternative to WIMPS as halo dark matter. In this paper we consider the effect of embedding a supermassive black hole within such a halo, and estimate the absorption probability and the accretion rate of dark matter onto the black hole. We show that the accretion rate would be small over the lifetime of a typical halo, and hence that supermassive ...