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An Accurate Distance to High-Velocity Cloud Complex C | | C. Thom
; J.E.G. Peek
; M.E. Putman
; Carl Heiles
; K.M.G. Peek
; R. Wilhelm
; | | Date: |
4 Dec 2007 | | Abstract: | We report an accurate distance of d = 10 +/- 2.5 kpc to the high-velocity
cloud Complex C. Using high signal-to-noise Keck/HIRES spectra of two
horizontal-branch stars, we have detected CaII K absorption lines from the
cloud. Significant non-detections towards a further 3 stars yield robust lower
distance limits. The resulting HI mass of Complex C is M_HI = 4.9^{+2.8}_{-2.2}
x 10^6 Msun; a total mass of M_tot = 8.2^{+4.6}_{-2.6} x 10^6 Msun is implied,
after corrections for helium and ionization. We estimate the contribution of
Complex C to the mass influx to be ~0.1 Msun/yr. | | Source: | arXiv, 0712.0612 | | Services: | Forum | Review | PDF | Favorites | |
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