Results 31 to 40 of about 232,000 (280)

Ionospheric measurements of relative coronal brightness during the total solar eclipses of 11 August, 1999 and 9 July, 1945 [PDF]

Annales Geophysicae, 2000
Swept-frequency (1-10 MHz) ionosonde measurements were made at Helston, Cornwall (50°06'N, 5°18'W) during the total solar eclipse on August 11, 1999. Soundings were made every three minutes.
C. J. Davis, C. J. Davis, M. Lockwood, M. Lockwood, S. A. Bell, S. A. Bell, J. A. Smith, J. A. Smith, E. M. Clarke, E. M. Clarke   +9 more
doaj   +1 more source

New Astronomical Observatory Design for the Detection and Tracking of Satellite Objects: The Satellite Robotic Observatory (SRO)

Remote Sensing
Robotic Astronomical Observatories (RAOs) have provided very good results in different research projects in astrophysics/astronomy. Their applications in the detection, tracking, and identification of near-Earth objects have contributed to the ...
Francisco Espartero, Javier Cubas, David Nespral, Santiago Pindado   +3 more
doaj   +1 more source

No magnetic field variation with pulsation phase in the roAp star gamma Equulei

, 2004
We present an analysis of 210 high-resolution time-resolved spectropolarimetric observations of the roAp star gamma Equ obtained over three nights in August and September 2003.
Kochukhov, O., Piskunov, N., Ryabchikova, T.   +2 more
core   +1 more source

Probing the variability of the fine-structure constant with the VLT/UVES [PDF]

, 2003
We assess the cosmological variability of the fine-structure constant from the analysis of an ensemble of Fe II absorption lines at the redshift z=1.15 toward the QSO HE 0515-4414 by means of the standard many-multiplet (MM) technique and its revision ...
Levshakov, Sergei A., Quast, Ralf, Reimers, Dieter   +2 more
core   +1 more source

Visible-IR Colors and Lightcurve Analysis of Two Bright TNOs: 1999 TC36 and 1998 SN165

, 2002
We report on observations of two bright Trans-Neptunian Objects (TNOs) - 1999 TC36 and 1998 SN165}- during two observational campaigns, as part of the Meudon Multicolor Survey of Outer Solar System Objects. V-J color was measured for 1999 TC36 (V-J=2.34+/
Doressoundiram, A., Peixinho, N., Romon-Martin, J.   +2 more
core   +2 more sources

SWAS and Arecibo observations of H2O and OH in a diffuse cloud along the line-of-sight to W51 [PDF]

, 2002
Observations of W51 with the Submillimeter Wave Astronomy Satellite (SWAS) have yielded the first detection of water vapor in a diffuse molecular cloud.
David A. Neufeld, David J. Hollenbach, Elitzur M., Joulain K., Michael J. Kaufman, Paul F. Goldsmith, Rene Plume, Williams T. L.   +7 more
core   +4 more sources

Circular Polarization in Pulsar Integrated Profiles: Updates

, 2006
We update the systematic studies of circular polarization in integrated pulse profiles by Han et al (1998). Data of circular polarization profiles are compiled.
Biggs J D, Crawford F, Gil J A, Gould D M, Hamilton P A, Han J L, Jin-lin Han, Kramer M, Kramer M, Lommen A N, Lyne A G, Macquart J P, Manchester R N, Manchester R N, McCulloch P M, Melrose D, Navarro J, Petrova S A, Qiao G J, Qiao G J, Radhakrishnan V, Roberts M S E, Stairs I H, van Ommen T D, von Hoensbroech A, von Hoensbroech A, Weisberg J M, Weisberg J M, Xiao-Peng You, Xilouris K M, Xu R X   +30 more
core   +1 more source

Cervical Spinal Cord Magnetization Transfer Ratio and Its Relationship With Clinical Outcomes in Multiple Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective The cervical spinal cord (cSC) is highly relevant to clinical dysfunction in multiple sclerosis (MS) but remains understudied using quantitative magnetic resonance imaging (MRI). We assessed magnetization transfer ratio (MTR), a semi‐quantitative MRI measure sensitive to MS‐related tissue microstructural changes, in the cSC and its ...
Lisa Eunyoung Lee, Julien Cohen‐Adad, Irene M. Vavasour, Melanie Guenette, Katherine Sawicka, Neda Rashidi‐Ranjbar, Nathan Churchill, Akash Chopra, Adelia Adelia, Pierre‐Louis Benveniste, Anthony Traboulsee, Nathalie Arbour, Fabrizio Giuliani, Larry D. Lynd, Scott B. Patten, Alexandre Prat, Alice Schabas, Penelope Smyth, Roger Tam, Yunyan Zhang, Simon J. Graham, Mojgan Hodaie, Anthony Feinstein, Shannon Kolind, Tom A. Schweizer, Jiwon Oh, CanProCo Study Group   +26 more
wiley   +1 more source

An Analysis of the Effect on the Data Processing of Korea GPS Network by the Absolute Phase Center Variations of GPS Antenna [PDF]

Journal of Astronomy and Space Sciences, 2006
The International GNSS Service (IGS) has prepared for a transition from the relative phase center variation (PCV) to the absolute PCV, because the terrestrial scale problem of the absolute PCV was resolved by estimating the PCV of the GPS satellites ...
Jeongho Baek, Hyung-Chul Lim, Jung Hyun Jo, Sungki Cho, Jung-Ho Cho   +4 more
doaj   +1 more source

Stability of the mixed phase in hybrid stars

, 2004
The transition from hadronic matter to quark matter in the core of neutron stars is likely to be associated with the appearance of a mixed phase, leading to a smooth variation of the star density profile.
Akmal, Baym, Baym, Baym, Berger, Berger, Carlson, Chodos, Cottam, De Grand, Finn, Glendenning, Heiselberg, Heiselberg, Lattimer, McDermott, Miniutti, O. Benhar, Pethick, Pieper, Pudliner, Quaintrell, R. Rubino, Ravenhall, Satz, Steiner, Tamagaki, Thorsett, Volkoff, Wiringa, Wiringa   +30 more
core   +1 more source