Results 51 to 60 of about 968 (218)
MHD Simulations of Magnetized Stars in the Propeller Regime of Accretion
EPJ Web of Conferences, 2014 Accreting magnetized stars may be in the propeller regime of disc accretion in which the angular velocity of the stellar magnetosphere exceeds that of the inner disc.
Lii Patrick +2 more
doaj +1 more source
Multiple Rings and Asymmetric Structures in the Disk of SR 21
The Astrophysical Journal, 2023 Crescent-like asymmetric dust structures discovered in protoplanetary disks indicate dust aggregations. Thus, researching these structures helps us understand the planet formation process. Here we analyze ALMA data of the protoplanetary disk around the T-
Yi Yang +11 more
doaj +1 more source
The Astronomical Journal, 1993 We present an atlas of 96 low dispersion spectra of T Tauri stars, both classical and weak-lined. The flux-calibrated spectra extend from Hβ to well blueward of the Balmer jump. Observed equivalent widths and rough blue veilings are presented. We model stars with excess emission as a combination of a weak-lined T Tauri star of a similar spectral type ...
Christopher M. Johns +2 more
openaire +2 more sources
Haro 5-2: A New Pre-main-sequence Quadruple Stellar System
The Astronomical JournalWe have discovered that the H α emission-line star Haro 5-2, located in the 3–6 Myr old Ori OB1b association, is a young quadruple system. The system has a 2+2 configuration, with an outer separation of 2.″6 and with resolved subarcsecond inner binary ...
Bo Reipurth +11 more
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Antinomies of Alignment Redux: The United Arab Emirates and the United States
Middle East Policy, EarlyView.Abstract Over the past three decades, the United Arab Emirates has forged a sturdy bilateral security alignment with the United States. It has also pursued foreign policies that conflict with US interests in the Gulf and the broader Middle East. This contradiction is usually attributed to a hedging strategy.
Fred H. Lawson, Matteo Legrenzi
wiley +1 more source
The magnetosphere of the close accreting PMS binary V4046 Sgr
EPJ Web of Conferences, 2014 V4046 Sagittarii AB is a close short-period classical T Tauri binary. It is a circularised and synchronised system accreting from a circumbinary disk.
Gregory S. G. +16 more
doaj +1 more source
The Spectral Variability of the T Tauri Star DF Tauri [PDF]
The Astrophysical Journal, 1997 We analyze 117 echelle spectra of the T Tauri star DF Tau, concentrating on variations in the optical continuum veiling and the strong emission lines. Although this star was the inspiration for the original suggestion of magnetospheric accretion in T Tauri stars (TTSs), this hypothesis is only partially supported in our data. We find that variations in
Gibor Basri, Christopher M. Johns-Krull
openaire +2 more sources
Eleanor Coade and Horace Walpole's Gothic Gateway: A Study in Eighteenth‐Century Business Practice
Journal for Eighteenth-Century Studies, Volume 48, Issue 2, Page 149-176, June 2025.Abstract Artificial stone manufacturer Eleanor Coade (1733–1821) was the outstanding female entrepreneur of the eighteenth century, running her own successful business for some fifty years. Her name became a nationally recognized brand, and her firm's architectural and sculptural stoneware products are still ubiquitous.
Caroline Stanford
wiley +1 more source
Anisotropic Ionizing Illumination from an M-type Pre-main-sequence Star, DM Tau
The Astrophysical Journal, 2023 The powerful, high-energy magnetic activities of young stars play important roles in the magnetohydrodynamics in the innermost parts of the protoplanetary disks. In addition, the associated UV and X-ray emission dictates the photochemistry; moreover, the
Yuka Terada +8 more
doaj +1 more source