Search Publications
The Amazing Old Nova Q Cygni: A Far-Ultraviolet Synthetic Spectral Analysis
Kolobow, Craig; Sion, Edward
Q Cygni (Nova Cygni 1876) is the third-oldest old novae (after WY Sge and V841 Oph), with a long orbital period of 10.08 hr and spectroscopic peculiarities in the optical, including the presence of variable wind outflow revealed by optical P Cygni profiles in the He i lines and Hαβ. We have carried out a synthetic spectral analysis of a far-ultrav…
Searching for Orbital Periods of Supergiant Fast X-ray Transients
Stella, L.; Walter, R.; Bozzo, E. +2 more
Building on the currently active program of observing High Mass X-ray Binaries (HMXBs), we describe here a challenging extension of the project for experienced AAVSO observers who want to push their observing to the limit. A new subclass of HMXBs, the Supergiant Fast X-ray Transients (SFXTs), have been recently discovered in INTEGRAL data and are …
Detailed study of B037 based on HST images
Ma, Jun
B037 is of interest because it is both the most luminous and the most highly reddened cluster known in M31. Deep observations and high spatial resolution images with the Advanced Camera for Surveys on the Hubble Space Telescope (HST) first showed that this cluster is crossed by a dust lane. Photometric data in the F606W and F814W filters obtained …
Detection of Outflowing and Extraplanar Gas in Disks in an Assembling Galaxy Cluster at z = 0.37
Saintonge, Amélie; Tran, Kim-Vy H.; Gonzalez, Anthony H. +5 more
We detect ionized gas characteristics indicative of winds in three disk-dominated galaxies that are members of a super-group at z = 0.37 that will merge to form a Coma-mass cluster. All three galaxies are IR luminous (L IR > 4 × 1010 L ⊙, SFR > 8 M ⊙ yr-1) and lie outside the X-ray cores…
Plasma diffusion in self-consistent fluctuations
Belmont, G.; Aunai, N.; Smets, R. +1 more
The problem of particle diffusion in position space, as a consequence of electromagnetic fluctuations is addressed. Numerical results obtained with a self-consistent hybrid code are presented, and a method to calculate diffusion coefficient in the direction perpendicular to the mean magnetic field is proposed. The diffusion is estimated for two di…
Comparison of HMI Dopplergrams with GONG and MDI data
Howe, R.; Komm, R.; Hill, F. +3 more
We compare sample Dopplergrams from the Helioseismic and Magnetic Imager, the Michelson Doppler Imager and the Global Oscillation Network Group. Each instrument has a distinct static velocity patterm across the disk; once this has been subtracted and the images interpolated to a common grid, the agreement is satisfactory.
Conjunction of anti-parallel and component reconnection at the dayside MP: Cluster and Double Star coordinated observation on 6 April 2004
Wei, Y.; Dunlop, M. W.; Bogdanova, Y. V. +7 more
Previous theoretical and simulation studies have suggested that the anti-parallel and component reconnection can occur simultaneously on the dayside magnetopause. Certain observations have also been reported to support global conjunct pattern of magnetic reconnection. Here, we show direct evidence for the conjunction of anti-parallel and component…
Properties of Granules in Upflows and Downflows
Yang, Shuhong; Jin, Chunlan; Yu, Daren +2 more
Normal-mode observations of seven quiet regions, obtained by the Hinode spacecraft, are used to analyze the physical properties of granules with mean upward and downward Doppler velocity. We identify 75 146 granules from the observations with a granule-detection method. Then the granules are divided into two subsets: one with negative mean Doppler…
The Magnetopause its boundary layers and pathways to the magnetotail
Farrugia, C. J.; Eastwood, J. P.; Lavraud, B. +1 more
Coronal properties of planet-bearing stars (Corrigendum)
Schmitt, J. H. M. M.; Robrade, J.; Poppenhaeger, K.