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A Full Year's Chandra Exposure on SDSS Quasars from the Chandra Multiwavelength Project
Paul J. Green, T. L. Aldcroft, G. T. Richards +13
We study the spectral energy distributions and evolution of a large sample of optically selected quasars from the Sloan Digital Sky Survey (SDSS) that were observed in 323 Chandra…
The Structure of Active Merger Remnant NGC 6240 from IRAC Observations
Stephanie J. Bush, Zhong Wang, Margarita Karovska +1
NGC 6240 is a rare object in the local universe: an active merger remnant viewed at the point of merging where two active galactic nuclei are visible. We present IRAC data of this…
Direct Detection of the Close Companion of Polaris with the Hubble Space Telescope
Nancy Remage Evans, Gail H. Schaefer, Howard E. Bond +5
Polaris, the nearest and brightest classical Cepheid, is a single-lined spectroscopic binary with an orbital period of 30 years. Using the High Resolution Channel of the Advanced C…