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BVRI photometric analysis for the galaxy group NGC 4410
Meaburn, J.; Katsiyannis, A. C.; Khosroshahi, H. G. +4 more
We present a BVRI CCD (Charge Coupled Device) surface photometry analysis of the galaxy group NGC 4410, which contains four galaxies in interaction. Along with our photometric study, we show residual images (after subtracting isophotal models) and unsharp masked images to uncover any hidden structures in this system of galaxies; we have also perfo…
Large-scale disturbances preceding a fast halo CME
Zong, W. -G.
Aims:The nature of coronal waves, often termed “EIT waves” is still unclear. Therefore new efforts are needed to investigate large-scale disturbances during solar eruptions. In this paper, we present observations of an event occurring on 19 January 2005, and study the large-scale disturbance during the event in detail.
Methods: Using the high …
A peculiar object in M 51: fuzzy star cluster or a background galaxy?
Larsen, S. S.; Anders, P.; Lamers, H. J. G. L. M. +1 more
Aims: We study a peculiar object with a projected position close to the nucleus of M 51. It is unusually large for a star cluster in M 51 and we therefore investigate the three most likely options to explain this object: (a) a background galaxy, (b) a cluster in the disk of M 51 and (c) a cluster in M 51, but in front of the disk.
Methods: We …
Discovery of X-ray emission from the eclipsing brown-dwarf binary 2MASS J05352184-0546085
Schmitt, J. H. M. M.; Czesla, S.; Schneider, P. C.
The eclipsing brown-dwarf binary system 2MASS J05352184-0546085 is a case sui generis. For the first time, it allows a detailed analysis of the individual properties of young brown dwarfs, in particular, masses, and radii, and the temperature ratio of the system components can be determined accurately. The system shows a “temperature reversal" wit…