Results 61 to 70 of about 264,729 (328)
Confirmation of a gapped primordial disk around LkCa 15 [PDF]
Astrophys.J.682:L125-L128,2008, 2008 Recently, analysis of near-infrared broad-band photometry and Spitzer IRS spectra has led to the identification of a new "pre-transitional disk" class whose members have an inner optically thick disk separated from an outer optically thick disk by an optically thin gap.
arxiv +1 more source
Unveiling the Structure of Pre-Transitional Disks [PDF]
, 2010 In the past few years, several disks with inner holes that are empty of small dust grains have been detected and are known as transitional disks. Recently, Spitzer has identified a new class of "pre-transitional disks" with gaps; these objects have an optically thick inner disk separated from an optically thick outer disk by an optically thin disk gap.
arxiv +1 more source
The 2-D structure of dusty disks around Herbig Ae/Be stars, I. Models with grey opacities [PDF]
Astron.Astrophys. 395 (2002) 853-862, 2002 In this paper the two-dimensional structure of protoplanetary disks around Herbig Ae/Be stars is studied. This is done by constructing a self-consistent model based on 2-D radiative transfer coupled to the equation of vertical hydrostatics. As a simplifying assumption a grey opacity is used. It is found that the disk can adopt four different structures,
arxiv +1 more source
Herschel evidence for disk flattening or gas depletion in transitional disks [PDF]
, 2014 Transitional disks are protoplanetary disks characterized by reduced near- and mid-infrared emission with respect to full disks. This characteristic spectral energy distribution indicates the presence of an optically thin inner cavity within the dust disk believed to mark the disappearance of the primordial massive disk.
arxiv +1 more source
Actuation of Micro-Optomechanical Systems Via Cavity-Enhanced Optical Dipole Forces [PDF]
, 2007 We demonstrate a new type of optomechanical system employing a movable, micron-scale waveguide evanescently-coupled to a high-Q optical microresonator. Micron-scale displacements of the waveguide are observed for milliwatt(mW)-level optical input powers.
A Ashkin +39 more
core +2 more sources
Clinical Findings and Genetic Expression Profiling of Three Pigmented Lesions of the Optic Nerve
Case Reports in Ophthalmological Medicine, 2015 Background. Optic disk melanocytoma is a primary tumor of the optic disk that represents a clinical diagnostic challenge due to its similarities with melanoma. Purpose.
Manuel A. de Alba +6 more
doaj +1 more source
Imaging of the Lamina Cribrosa using Swept-Source Optical Coherence Tomography. [PDF]
, 2012 The lamina cribrosa (LC) is the presumed site of axonal injury in glaucoma. Its deformation has been suggested to contribute to optic neuropathy by impeding axoplasmic flow within the optic nerve fibers, leading to apoptosis of retinal ganglion cells. To
Mansouri, Kaweh +2 more
core +2 more sources
Journal of Ophthalmology, 2016 Introduction. Optic disk pit has been considered as coloboma located, as a rule, near temporal part of the optic disc. Central serous retinal detachment develops in 50 % of patients.
I.I. Shevchenko
doaj +1 more source
APOLLO: the Apache Point Observatory Lunar Laser-ranging Operation: Instrument Description and First Detections [PDF]
, 2007 A next-generation lunar laser ranging apparatus using the 3.5 m telescope at the Apache Point Observatory in southern New Mexico has begun science operation.
Adelberger, E. G. +12 more
core +1 more source
Journal of Applied Clinical Medical Physics, Volume 26, Issue 4, April 2025.Abstract This article investigates the performance of a commercial BeO optically stimulated luminescent (OSL) dosimetry system (myOSLchip, RadPro GmbH International, Remscheid, Germany) through the application of the commissioning framework for luminescent dosimeters as described in the American Association of Physicists in Medicine Task Group 191 ...
Joseph P. Kowalski +4 more
wiley +1 more source