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New 3-D gas density maps of NaI and CaII interstellar absorption within 300pc
Barry Y. Welsh, Rosine Lallement, Jean-Luc Vergely +1
We present new high resolution (R>50,000) absorption measurements of the NaI doublet (5889 - 5895A) along 482 nearby sight-lines, in addition to 807 new measurements of the CaII K…
GALEX ultraviolet observations of stellar variability in the Hyades and Pleiades clusters
S. E. Browne, B. Y. Welsh, J. M. Wheatley
We present GALEX near ultraviolet (NUV:1750 - 2750A) and far ultraviolet (FUV: 1350 - 1750A) imaging observations of two 1.2 degree diameter fields in the Hyades and Pleiades open…
Million Degree Plasmas in Extreme Ultraviolet (EUV) Astrophysics
Michael P. Kowalski, Martin Barstow, Frederick Bruhweiler +12
Million degree plasmas are ubiquitous in the Universe, and examples include the atmospheres of white dwarfs; accretion phenomena in young stars, cataclysmic variables and active ga…
High resolution NaI and CaII absorption observations towards M13, M15 and M33
B. Y. Welsh, J. M. Wheatley, R. Lallement
We present high resolution (R = 60,000) measurements of the NaI D1 and D2 (5890 A) and CaII K (3933 A) interstellar absorption line profiles recorded towards several post-AGB stars…