Publications (6)
Improved Distances to Type Ia Supernovae with Two Spectroscopic Subclasses
Xiaofeng Wang, A. V. Filippenko, M. Ganeshalingam +10
We study the observables of 158 relatively normal Type Ia supernovae (SNe Ia) by dividing them into two groups in terms of the expansion velocity inferred from the absorption minim…
Analysis of the rotation period of asteroids (1865) Cerberus, (2100) Ra-Shalom, and (3103) Eger - search for the YORP effect
J. Durech, D. Vokrouhlicky, A. R. Baransky +28
The spin state of small asteroids can change on a long timescale by the Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect, the net torque that arises from anisotropically scatter…
A Dynamical Solution of the Triple Asteroid System (45) Eugenia
F. Marchis, V. Lainey, P. Descamps +9
We present the first dynamical solution of the triple asteroid system (45) Eugenia and its two moons Petit-Prince (Diameter~7 km) and S/2004 (45) 1 (Diameter~5 km). The two moons o…
Formation of asteroid pairs by rotational fission
P. Pravec, D. Vokrouhlicky, D. Polishook +23
Asteroid pairs sharing similar heliocentric orbits were found recently. Backward integrations of their orbits indicated that they separated gently with low relative velocities, but…
Observations of the Naked-Eye GRB 080319B: Implications of Nature's Brightest Explosion
J. S. Bloom, D. A. Perley, W. Li +18
The first gamma-ray burst (GRB) confirmed to be bright enough to be seen with the naked eye, GRB 080319B at redshift z = 0.937, allowed for exquisite follow-up observations across…
Triplicity and Physical Characteristics of Asteroid (216) Kleopatra
Pascal Descamps, F. Marchis, J. Berthier +16
To take full advantage of the September 2008 opposition passage of the M-type asteroid (216) Kleopatra, we have used near-infrared adaptive optics (AO) imaging with the W.M. Keck I…