New 3-D density maps of NaI and CaII interstellar absorption within 300pc

Abstract : We present new high resolution (R > 50 000) absorption measurements of the NaI doublet (5889-5895 Å) along 482 nearby sight-lines, in addition to 807 new measurements of the CaII K (3933 Å) absorption line. We have combined these new data with previously reported measurements to produce a catalog of absorptions towards a total of 1857 early-type stars located within 800 pc of the Sun. Using these data we have determined the approximate 3-dimensional spatial distribution of neutral and partly ionized interstellar gas density within a distance-cube of 300 pc from the Sun.
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Submitted on : Friday, January 1, 2010 - 2:20:13 PM
Last modification on : Wednesday, August 7, 2019 - 12:19:23 PM

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Barry Y. Welsh, Rosine Lallement, Jean-Luc Vergely, Séverine Raimond. New 3-D density maps of NaI and CaII interstellar absorption within 300pc. Astronomy and Astrophysics - A&A, EDP Sciences, 2010, 510, pp.A54. ⟨10.1051/0004-6361/200913202⟩. ⟨hal-00443652⟩

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