Results 51 to 60 of about 35,527 (304)

Circumstellar Disk Accretion Across the Lagoon Nebula: The Influence of Environment and Stellar Mass

The Astronomical Journal
Pre-main-sequence disk accretion is pivotal for determining the final stellar properties and the early conditions for close-in planets. We aim to establish the impact of internal (stellar mass) and external (radiation field) parameters on the disk ...
Laura Venuti, Ann Marie Cody, Giacomo Beccari, Luisa M. Rebull, Michael J. Irwin, Apoorva Thanvantri, Sowmya Thanvantri, Silvia H. P. Alencar, Clara O. Leal, Geert Barentsen, Janet E. Drew, Steve B. Howell   +11 more
doaj   +1 more source

Impact of the Accretion Disk Thickness on the Polarization of the Thermal Emission from Stellar Mass Black Holes

The Astrophysical Journal, 2023
The Imaging X-ray Polarimetry Explorer, launched in 2021 December, enables precision measurements of the energy-dependent polarization of the X-ray emission from stellar mass and supermassive black holes.
Andrew Thomas West, Henric Krawczynski
doaj   +1 more source

Assisted Inspirals of Stellar Mass Black Holes Embedded in AGN Disks: Solving the "Final AU Problem"

, 2016
We explore the evolution of stellar mass black hole binaries (BHBs) which are formed in the self-gravitating disks of active galactic nuclei (AGN). Hardening due to three-body scattering and gaseous drag are effective mechanisms that reduce the semi ...
Haiman, Zoltan, Metzger, Brian D., Stone, Nicholas C.   +2 more
core   +1 more source

An Analytic Model of Angular Momentum Transport by Gravitational Torques: From Galaxies to Massive Black Holes [PDF]

, 2011
We present analytic calculations of angular momentum transport and gas inflow in galaxies, from scales of ~kpc to deep in the potential of a central black hole (BH).
Adams, Agertz, Athanassoula, Athanassoula, Athanassoula, Balbus, Barnes, Barnes, Barnes, Begelman, Berentzen, Bigiel, Binney, Block, Bouché, Bournaud, Bournaud, Bournaud, Bryant, Carlberg, Colpi, Combes, Cossins, Cox, Cox, Dasyra, Davies, DeBuhr, DeBuhr, Di, Dotti, Durbala, Eliche-Moral, Eliot Quataert, Escala, Escala, Gammie, García-Burillo, Genzel, Ghez, Goldreich, Goldreich, Goldreich, Goldreich, Goldreich, Goodman, Greene, Greenhill, Gunn, Haan, Heckman, Helfer, Hernquist, Hernquist, Hernquist, Hernquist, Hernquist, Hernquist, Hibbard, Hicks, Hopkins, Hopkins, Hopkins, Hopkins, Hopkins, Hopkins, Hopkins, Hopkins, Kalnajs, Kawakatu, Kennicutt, Klessen, Knapen, Knapen, Kormendy, Krumholz, Laine, Larson, Lau, Lauer, Lauer, Levine, Levine, Lin, Lodato, Lynden Bell, Martini, Mayer, Mayer, Mo, Murray, Nayakshin, Nayakshin, Noguchi, Ostriker, Ostriker, O’Shea, Papaloizou, Peletier, Philip F. Hopkins, Pier, Power, Quillen, Roberts, Robertson, Robertson, Sakamoto, Sanders, Sanders, Schinnerer, Serabyn, Shlosman, Shlosman, Shu, Sirko, Solomon, Spaans, Springel, Springel, Springel, Springel, Tacconi, Teyssier, Thompson, Toomre, Toomre, Toomre, Toomre, Tremaine, Volonteri, Wada, Weinberg, Wise, Younger   +133 more
core   +1 more source

Influence of Sample Preparation and Processing Procedures on the Thermal Diffusivity of MgO‐C Refractories

Advanced Engineering Materials, EarlyView.
The thermal diffusivity of MgO‐C refractories is highly sensitive to sample preparation and processing procedures. In this article, the effects of coking sequence, machining conditions, structural inhomogeneity, and graphite coating application on measurements using laser flash apparatus are systematically investigated.
Luyao Pan, Rhena Wulf, Till M. J. Stadtmüller, Christos G. Aneziris, Tobias M. Fieback   +4 more
wiley   +1 more source

Evolution of the Accretion Rate of Young Intermediate-mass Stars: Implications for Disk Evolution and Planet Formation

The Astronomical Journal
This work presents a study of the evolution of the stellar accretion rates of pre-main-sequence intermediate-mass stars. We compare the accretion rate of the younger intermediate-mass T Tauri stars (IMTTSs) with the older Herbig stars into which they ...
Sean D. Brittain, Joshua W. Kern, Gwendolyn Meeus, René D. Oudmaijer   +3 more
doaj   +1 more source

Radiation Transport Two-temperature GRMHD Simulations of Warped Accretion Disks

The Astrophysical Journal Letters, 2023
In many black hole (BH) systems, the accretion disk is expected to be misaligned with respect to the BH spin axis. If the scale height of the disk is much smaller than the misalignment angle, the spin of the BH can tear the disk into multiple ...
M. T. P. Liska, N. Kaaz, G. Musoke, A. Tchekhovskoy, O. Porth   +4 more
doaj   +1 more source

3D‐Printed Giant Magnetoresistive (GMR) Sensors Based on Self Compliant Springs

Advanced Engineering Materials, EarlyView.
This work explores 3D‐printed GMR sensors utilizing self‐compliant spring structures and conductive PLA composites. By optimizing arm width, we achieved high piezoresistive (0.34%/mm) and magnetoresistive (0.77%/mT) sensitivities. Demonstrated through Bluetooth‐integrated pressure and magnetic position sensing, these full printed low‐cost, customizable
Josu Fernández Maestu, Nelson Pereira, Javier Vicente, Carmen Rial Tubio, Senentxu Lanceros‐Méndez   +4 more
wiley   +1 more source

Stellar Evolution with Radiative Feedback in AGN Disks

The Astrophysical Journal
Stars embedded in the inner parsec region of an active galactic nucleus (AGN) experience extreme accretion conditions that significantly alter their evolution.
Zheng-Hao Xu, Yi-Xian Chen, Douglas N. C. Lin   +2 more
doaj   +1 more source

Measuring Organic Molecular Emission in Disks with Low Resolution Spitzer Spectroscopy

, 2011
We explore the extent to which Spitzer IRS spectra taken at low spectral resolution can be used in quantitative studies of organic molecular emission from disks surrounding low mass young stars.
Apai, Daniel, Carr, John S., Henning, Thomas, Najita, Joan R., Pascucci, Ilaria, Teske, Johanna K.   +5 more
core   +1 more source