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Dust, Metals and Diffuse Interstellar Bands in Damped Lyman Alpha Systems
Sara L. Ellison
Although damped Lyman alpha (DLA) systems are usually considered metal-poor, it has been suggested that this could be due to observational bias against metal-enriched absorbers. I…
Three intervening galaxy absorbers towards GRB060418: faint and dusty?
Sara L. Ellison, Paul Vreeswijk, Cedric Ledoux +8
We present an analysis of three strong, intervening Mg II absorption systems (z_abs = 0.603, 0.656, 1.107) towards the optical afterglow of gamma-ray burst (GRB) 060418. From high…
The Metal-Strong Damped Lyman-alpha Systems
Stéphane Herbert-Fort, Jason X. Prochaska, Miroslava Dessauges-Zavadsky +4
We have identified a metal-strong (logN(Zn+) > 13.15 or logN(Si+) > 15.95) DLA (MSDLA) population from an automated quasar (QSO) absorber search in the Sloan Digital Sky Survey Dat…
Detection of Diffuse Interstellar Bands in the z=0.5 Damped Lyman alpha system towards AO 0235+164
Brian A. York, Sara L. Ellison, Brandon Lawton +4
We report the first detection of the 5705 and 5780 A Diffuse Interstellar Bands (DIBs) in a moderate redshift Damped Lyman alpha (DLA) system. We measure a rest frame equivalent wi…
HI 21cm Absorption at towards PKS B0438-436
N. Kanekar, R. Subrahmanyan, S. L. Ellison +2
We report the detection of redshifted HI~21cm absorption in the damped Lyman- absorber (DLA) towards PKS B0438-436, with the Green Bank Telescope. This is the sec…
An optical supernova associated with the X-ray flash XRF 060218
E. Pian, P. A. Mazzali, N. Masetti +42
Long-duration gamma-ray bursts (GRBs) are associated with type Ic supernovae that are more luminous than average and that eject material at very high velocities. Less-luminous supe…