58 citations · 182 across the 10 of their papers we have counts for
10 papers
Non ideal Transport Processes in the Solar Atmosphere
B P Pandey, Mark Wardle
Transport coefficients are calculated for a partially ionized plasma consisting of approximately 90% hydrogen and 10\% helium, representative of a model solar atmosphere with an as…
Viscous Heating and Instabilities in the Partially Ionized Solar Atmosphere
B. P. Pandey, Mark Wardle
In weak magnetic fields ($\lesssim 50 \,\mbox{G}$), parallel and perpendicular viscosities, mainly from neutrals, may exceed magnetic diffusivities (Ohm, Hall, ambipolar) in the mi…
Compact Radio Sources within 30" of Sgr A*: Proper Motions, Stellar Winds and the Accretion Rate onto Sgr A*
F. Yusef-Zadeh, H. Bushouse, R. Schödel +5
Recent broad-band 34 and 44 GHz radio continuum observations of the Galactic center have revealed 41 massive stars identified with near-IR counterparts, as well as 44 proplyd candi…
Signatures of Young Star Formation Activity Within Two Parsecs of Sgr A*
F. Yusef-Zadeh, M. Wardle, M. Sewilo +9
We present radio and infrared observations indicating on-going star formation activity inside the pc circumnuclear ring at the Galactic center. Collectively these measure…
The Origin of Parsec-Scale Gaseous and Stellar Disks in the Galactic Center and AGNs
F. Yusef-Zadeh, M. Wardle
The Galactic center stellar disk and the circumnuclear ring provide a unique opportunity to study in detail the dynamics and physical conditions of distant molecular disks in the n…
Occultation of the Quiescent Emission from Sgr A* by IR Flares
F. Yusef-Zadeh, M. Wardle, H. Bushouse +2
We have investigated the nature of flare emission from Sgr A* during multi-wavelength observations of this source that took place in 2004, 2005 and 2006. We present evidence for di…
Wind-driving protostellar accretion discs. II. Numerical method and illustrative solutions
R. Salmeron, A. Königl, M. Wardle
(abridged) We continue our study of weakly ionized protostellar discs that are threaded by a large-scale magnetic field and power a centrifugally driven wind. It has been argued th…
The Underluminous Nature of Sgr A*
F. Yusef-Zadeh, M. Wardle
In the last several years, a number of observing campaigns of the massive black hole Sgr A* has been carried out in order to address two important issues: one concerns the underlum…
Wind-driving protostellar accretion discs. I. Formulation and parameter constraints
A. Königl, R. Salmeron, M. Wardle
We study a model of weakly ionized, protostellar accretion discs that are threaded by a large-scale, ordered magnetic field and power a centrifugally driven wind. We consider the l…
Multiwavelength observations of the supernova remnant G349.7+02 interacting with a molecular cloud
J. S. Lazendic, M. Wardle, J. B. Whiteoak +2
We present molecular-line observations at millimetre, centimetre and infrared wavelengths of the region containing OH(1720 MHz) masers in the supernova remnant (SNR) G349.7+0.2, us…