SIMBAD references

2025ApJ...988..251V - Astrophys. J., 988, 251 (2025/August-1)

Dust in the Smith Cloud? A UV Investigation into the Smith Cloud's Gas-phase Abundance Patterns.

VAZQUEZ J.T., BARGER K.A., CASHMAN F.H., FOX A.J., WAKKER B.P., LOCKMAN F.J., HILL A.S., POUDEL S., HORTON A.L., HERNANDEZ J., NUSS M., BLAKE A., CORLIES L. and PEEPLES M.

Abstract (from CDS):

The Smith Cloud is a high-velocity cloud (HVC) on its final approach to the Milky Way that shows evidence of interaction with the Galaxy's disk. We investigate the metallicity and gas-phase chemical depletion patterns in this HVC using UV absorption-line observations toward two background QSOs taken with the Hubble Space Telescope/Cosmic Origin Spectrograph and H I 21 cm emission-line observations taken with Green Bank Telescope. We find evidence of silicon gas-phase depletion with [Si/S] = $-0.7{2}_{-0.26}^{+0.24}$ and [Si/O]3σ ≲ -0.05, implying the presence of dust within the Smith Cloud. Because dust is galactic in origin, this HVC could trace the return leg of a Galactic fountain or a dwarf galaxy that passed through the Galactic plane.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Circumgalactic medium - Interstellar dust - High-velocity clouds - Ultraviolet astronomy - Chemical abundances

Simbad objects: 14

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2025ApJ...988..251V and select 'bookmark this link' or equivalent in the popup menu