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SGRs and AXPs as Rotation-Powered Massive White Dwarfs

Malheiro, Manuel; Rueda, Jorge A.; Ruffini, Remo

SGR 0418+5729 is a ``Rosetta Stone'' for deciphering the energy source of Soft Gamma Ray Repeaters (SGRs) and Anomalous X-ray Pulsars (AXPs). We present a model based on canonical physics and astrophysics for SGRs and AXPs powered by massive highly magnetized rotating white dwarfs (WDs), in total analogy with pulsars powered by rotating neutron st…

Distance and Reddening of the Isolated Dwarf Irregular Galaxy NGC 1156

Kim, Minjin; Lee, Joon Hyeop; Kyeong, Jaemann +3 more

We present a photometric estimation of the distance and reddening values to the dwarf irregular galaxy NGC 1156, that is one of the best targets for the study of isolated dwarf galaxies in the nearby universe. We used imaging data sets of the Hubble Space Telescope (HST) Advanced Camera for Surveys, High Resolution Channel of the central region of…