6 papers · 1 filter
V838 Monocerotis: A Geometric Distance from Hubble Space Telescope Polarimetric Imaging of its Light Echo
William B. Sparks, Howard E. Bond, Misty Cracraft +10
Following the outburst of the unusual variable star V838 Monocerotis in 2002, a spectacular light echo appeared. A light echo provides the possibility of direct geometric distance…
Rotation periods for stars of the TW Hydrae association
Warrick A. Lawson, Lisa A. Crause
We have conducted a photometric study of late-type members of the TW Hydrae association (TWA) and measured the rotation periods for 16 stars in 12 systems. For TWA stars listed by…
V838 Mon: light echo evolution and distance estimate
Lisa A. Crause, Warrick A. Lawson, John W. Menzies +1
Following its 2002 February eruption, V838 Mon developed a light echo that continues to expand and evolve as light from the outburst scatters off progressively more distant circums…
V4332 Sagittarii revisited
R. Tylenda, L. A. Crause, S. K. Gorny +1
The eruption of V4332 Sgr discovered in February 1994 shows striking similarities to that of V838 Mon started in January 2002. The nature of these eruptions is, however, enigmatic…
The post-outburst photometric behaviour of V838 Mon
Lisa A. Crause, Warrick A. Lawson, David Kilkenny +3
The unusual eruptive variable discovered in Monoceros in 2002 January underwent dramatic photometric and spectroscopic changes in the months prior to its 2002 June-August conjuncti…
Asteroseismology and forced oscillations of HD 209295, the first member of two classes of pulsating star
G. Handler, L. A. Balona, R. R. Shobbrook +9
We report the discovery of both intermediate-order gravity mode and low-order pressure mode pulsation in the same star, HD 209295. It is therefore both a gamma Doradus and a delta…