242 citations · 678 across the 5 of their papers we have counts for
5 papers
X-ray and Infrared Observations of Two Externally-Polluted White Dwarfs
M. Jura, M. P. Muno, J. Farihi +1
With XMM-Newton and the Spitzer Space Telescope, we obtain upper bounds to the X-ray fluxes from G29-38 and GD 362, and the 70 micron flux from G29-38. These data provide indirect…
Pollution of single white dwarfs by accretion of many small asteroids
M. Jura
Extrapolating from the solar system's asteroid belt, we propose that externally-contaminated white dwarfs without an infrared excess may be experiencing continuous accretion of gas…
Externally-polluted white dwarfs with dust disks
M. Jura, J. Farihi, B. Zuckerman
We report Spitzer Space Telescope photometry of eleven externally-polluted white dwarfs. Of the nine stars for which we have IRAC photometry, we find that GD 40, GD 133 and PG 1015…
Spitzer Observations of GD 362 and Other Metal-Rich White Dwarfs
J. Farihi, B. Zuckerman, E. E. Becklin +1
A {\em Spitzer} IRAC survey of 17 nearby metal-rich white dwarfs, nominally DAZ stars, reveals excess emission from only 3 targets: G29-38, GD 362 and G167-8. Observations of GD 36…
Carbon Deficiency in Externally-Polluted White Dwarfs: Evidence for Accretion of Asteroids
M. Jura
Existing determinations show that n(C)/n(Fe) is more than a factor of 10 below solar in the atmospheres of three white dwarfs that appear to be externally-polluted. These results a…