182 citations · 434 across the 9 of their papers we have counts for
9 papers
Observational identification of a sample of likely recent Common-Envelope Events
Theo Khouri, Wouter Vlemmings, Daniel Tafoya +5
One of the most poorly understood stellar evolutionary paths is that of binary systems undergoing common-envelope evolution, when the envelope of a giant star engulfs the orbit of…
High-resolution observations of IRAS 08544-4431. Detection of a disk orbiting a post-AGB star and of a slow disk wind
V. Bujarrabal, A. Castro-Carrizo, H. Van Winckel +4
We are studying a class of binary post-AGB stars that seem to be systematically surrounded by equatorial disks and slow outflows. Although the rotating dynamics had only been well…
Multiple Fast Molecular Outflows in the PPN CRL 618
Chin-Fei Lee, Raghvendra Sahai, Carmen Sánchez Contreras +2
CRL 618 is a well-studied pre-planetary nebula. It has multiple highly collimated optical lobes, fast molecular outflows along the optical lobes, and an extended molecular envelope…
Mapping the Central Region of the PPN CRL 618 at Sub-arcsecond Resolution at 350 GHz
Chin-Fei Lee, Chun-Hui Yang, Raghvendra Sahai +1
CRL 618 is a well-studied pre-planetary nebula. We have mapped its central region in continuum and molecular lines with the Submillimeter Array at 350 GHz at ~ 0.3" to 0.5" resolut…
Strong Variable Ultraviolet Emission from Y Gem: Accretion Activity in an AGB Star with a Binary Companion?
Raghvendra Sahai, James D. Neill, Armando Gil de Paz +1
Binarity is believed to dramatically affect the history and geometry of mass loss in AGB and post-AGB stars, but observational evidence of binarity is sorely lacking. As part of a…
High-Velocity Interstellar Bullets in IRAS05506+2414: A Very Young Protostar
Raghvendra Sahai, Mark Claussen, Carmen Sánchez Contreras +2
We have made a serendipitous discovery of an enigmatic outflow source, IRAS 05506+2414 (hereafter IRAS 05506), as part of a multi-wavelength survey of pre-planetary nebulae (PPNs).…