A5070437712- Solar and Space Plasma Dynamics
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Ionosphere and magnetosphere dynamics
- Astronomy and Astrophysical Research
- Astrophysical Phenomena and Observations
- Geomagnetism and Paleomagnetism Studies
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- History and Developments in Astronomy
- Geophysics and Gravity Measurements
- Fluid Dynamics and Turbulent Flows
- Pulsars and Gravitational Waves Research
- Magnetic confinement fusion research
- Nuclear and radioactivity studies
- Galaxies: Formation, Evolution, Phenomena
- Graphite, nuclear technology, radiation studies
- Nuclear Physics and Applications
- Cosmology and Gravitation Theories
- Atomic and Molecular Physics
- High-pressure geophysics and materials
- Global Energy and Sustainability Research
- Laser-Plasma Interactions and Diagnostics
University of Chicago
2013-2025
University of Illinois Chicago
2020
Argonne National Laboratory
2003-2009
American Academy of Arts and Sciences
2009
Center for Astrophysics Harvard & Smithsonian
1981-2008
Fermi National Accelerator Laboratory
1991-2008
Princeton University
2002
University of Wisconsin–Madison
2002
Harvard University
1982-1995
University of Cambridge
1994
view Abstract Citations (1506) References (50) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Dynamics of the quiescent solar corona. Rosner, R. ; Tucker, W. H. Vaiana, G. S. An analytical model for inhomogeneous corona is developed on basis hypothesis that looplike structures are basic coronal building blocks. By assuming loop observed in X-rays hydrostatic equilibrium, it demonstrated such loops must have their temperature maximum located near apex and...
view Abstract Citations (754) References (85) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Relations among stellar X-ray emission observed from Einstein, rotation and bolometric luminosity. Pallavicini, R. ; Golub, L. Rosner, Vaiana, G. S. Ayres, T. Linsky, J. The correlation between luminosities, projected rotational velocities for stars of various spectral types luminosity classes are determined. Early type (O3 to A5) have luminosities independent...
view Abstract Citations (670) References (21) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Structured coronae of accretion disks. Galeev, A. ; Rosner, R. Vaiana, G. S. A model based on the amplification magnetic fields by convective motions and differential rotation within a hot (no less than about 1,000,000 K) disk is developed for fluctuating hard component intense cosmic X-ray sources such as Cyg X-1. It shown that field reconnection inner portion...
Wavelets are scalable, oscillatory functions that deviate from zero only within a limited spatial regime and have average value zero, thus may be used to simultaneously characterize the shape, location, strength of astronomical sources. But in addition their use as source characterizers, wavelet rapidly gaining currency detection field. Wavelet-based involves correlation scaled with binned, two-dimensional image data. If chosen function exhibits property vanishing moments, significantly...
view Abstract Citations (547) References (89) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Results from an extensive Einstein stellar survey. Vaiana, G. S. ; Cassinelli, J. P. Fabbiano, Giacconi, R. Golub, L. Gorenstein, Haisch, B. M. Harnden, F. R., Jr. Johnson, H. Linsky, Maxson, C. W. Mewe, Rosner, Seward, Topka, K. Zwaan, The preliminary results of the Observatory X-ray survey are presented. To date, 143 soft sources have been identified with...
view Abstract Citations (402) References (45) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Intermittent Stellar Wind Acceleration and the Long-Term Activity of Population I Binary Systems Containing an X-Ray Pulsar Stella, L. ; White, N. E. Rosner, R. The full range possible regimes for a magnetized neutron star that interacts with stellar wind OB is investigated, results are compared observational data. observed properties system parameters all currently...
My life has been an interesting voyage. I became astronomer because could not imagine living on Earth and trying to understand how the Universe works. scientific career revolved around observing motions of stars within galaxies ...Read More
Abstract We present an overview of the National Science Foundation’s Daniel K. Inouye Solar Telescope (DKIST), its instruments, and support facilities. The 4 m aperture DKIST provides highest-resolution observations Sun ever achieved. large combined with state-of-the-art instrumentation provide sensitivity to measure vector magnetic field in chromosphere faint corona, i.e. for first time we will be able study most important free-energy source outer solar atmosphere – coronal field. Over...
We discuss the observed orbital period modulations in close binaries, and focus on mechanism proposed by Applegate relating changes of stellar internal rotation associated with a magnetic activity cycle variation gravitational quadrupole moment active component; this turn forces motion binary stars to follow level star. generalize approach considering details interaction, develop some illustrative examples which problem can be easily solved analytical form. Starting from such results, we...
view Abstract Citations (299) References (18) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Closed coronal structures. II - Generalized hydrostatic model Serio, S. ; Peres, G. Vaiana, Golub, L. Rosner, R. Numerical computations of stationary solar loop atmospheres are used to extend earlier analytical work. Two classes loops examined, namely symmetric with a temperature maximum at the top but now having length greater than pressure scale height and which...
In the 1960s, novel and increasingly powerful observational techniques opened up field of high-energy astrophysics. Cosmology started to become an empirical science, there was a resurgence in study general relativity. Martin Rees became ...Read More
view Abstract Citations (175) References (21) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Coronal closed structures. IV - Hydrodynamical stability and response to heating perturbations Peres, G. ; Serio, S. Vaiana, Rosner, R. The of magnetically confined atmospheres in the temperature density distribution, local rate by means a one-dimensional time-dependent hydrodynamical code, which incorporates full energy, momentum mass conservation equations is...
This paper is the second of a project dedicated to using solar Yohkoh/SXT data as guide and template interpret on stellar coronae. In light large differences in scope approach between studies, we have developed method translate whole corona into stellar-like data, i.e., put them same format context ones. First from images derive whole-Sun X-ray emission measure versus temperature [EM(T)], range 105.5-108 K, during specific observation. Then, synthesize spectrum; finally, fold spectrum...
We report an initial study of temperature and emission-measure distributions along four steady loops observed with the Transition Region Coronal Explorer at limb Sun. The diagnostic is filter ratio extreme-ultraviolet 171 195 Å passbands. count rate in passband. find essentially no variation loops. compare loop structure theoretical isothermal nonisothermal static structure.
Context.Accretion disks and astrophysical jets are used to model many active objects, such as young stars, relativistic galactic nuclei. However, existing proposals for how these structures may transfer angular momentum energy from through viscous or magnetic torques do not yet provide a full understanding of the physical mechanisms involved. Thus, global stationary solutions have explained stability structures; numerical simulations that include both disk jet physics so far been limited...
view Abstract Citations (221) References (28) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS An Einstein Observatory X-ray survey of main-sequence stars with shallow convection zones. Schmitt, J. H. M. ; Golub, L. Harnden, F. R., Jr. Maxson, C. W. Rosner, R. Vaiana, G. S. The results an bright late A and early F on the main B-V sequence between 0.1 0.5 are presented. All were observed for a period at least 500 seconds. show significantly larger luminosities...
view Abstract Citations (146) References (11) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Magnetic fields and coronal heating Golub, L. ; Maxson, C. Rosner, R. Vaiana, G. S. Serio, General considerations concerning the scaling properties of magnetic-field-related mechanisms are used to build a two-parameter model for closed regions. The predicts way in which temperature electron density related photospheric magnetic field strength size region, using...
view Abstract Citations (137) References (52) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Heating of coronal plasma by anomalous current dissipation. Rosner, R. ; Golub, L. Coppi, B. Vaiana, G. S. It is shown that there exist heating mechanisms which connect the observed radiative properties inner corona in a simple way to underlying solar magnetic field. The considered involve generation and consequent dissipation currents. argued spatially temporally...
view Abstract Citations (177) References (42) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Magnetic field instabilities in accretion disks Stella, L. ; Rosner, R. The stability of magnetic fields within the is examined, including effects buoyancy, Rayleigh-Taylor, and Kelvin-Helmholtz instabilities. purpose study to examine efficacy turbulent (alpha-)disk models which depend upon 'magnetic viscosity' provide dissipation necessary account for radial infall....
view Abstract Citations (179) References (32) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The cool Half of the H-R diagram in soft X-rays. Ayres, T. R. ; Linsky, J. L. Vaiana, G. S. Golub, Rosner, results an Einstein Observatory program to map occurrence hot coronae (T greater than 1 million K) half Hertzsprung-Russell are reported. F-M dwarfs, and late F through early K star giants characterized by 10,000 chromospheric 20,000-200,000 FUV emission lines...
view Abstract Citations (99) References (41) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Einstein X-ray survey of the Pleiades : dependence emission on stellar age. Micela, G. ; Sciortino, S. Serio, Vaiana, Bookbinder, J. Golub, L. Harnden, F. R., Jr. Rosner, R. The data obtained with two pointed observations 1 deg by fields region have been analyzed, and results are presented. maximum-likelihood luminosity functions for G K stars in cluster derived, it...
view Abstract Citations (121) References (45) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Solar magnetic fields - The generation of emerging flux Golub, L. ; Rosner, R. Vaiana, G. S. Weiss, N. O. X-ray observations have provided information about on the sun, and implications these are discussed. pattern small-scale emergence is quite different from that active regions. It inferred originate fairly high in convective zone, while regions a deeper origin....