972 citations · 8.4k across the 124 of their papers we have counts for
24 papers · 1 filter
Stellar proper motion and the timing of planetary transits
Roman R. Rafikov
Duration and period of transits in extrasolar planetary systems can exhibit long-term variations for a variety of reasons. Here we investigate how systemic proper motion, which ste…
Stellar growth by disk accretion: the effect of disk irradiation on the protostellar evolution
Roman R. Rafikov
Young stars are expected to gain most of their mass by accretion from a disk that forms around them as a result of angular momentum conservation in the collapsing protostellar clou…
Cooling of young stars growing by disk accretion
Roman Rafikov
In the initial formation stages young stars must acquire a significant fraction of their mass by accretion from a circumstellar disk that forms in the center of a collapsing protos…
Convective cooling and fragmentation of gravitationally unstable disks
Roman R. Rafikov
Gravitationally unstable disks can fragment and form bound objects provided that their cooling time is short. In protoplanetary disks radiative cooling is likely to be too slow to…
Microwave emission from spinning dust in circumstellar disks
Roman R. Rafikov
In the high density environments of circumstellar disks dust grains are expected to grow to large sizes by coagulation. Somewhat unexpectedly, recent near-IR observations of PAH fe…
Structure of Passive Circumstellar Disks: Beyond the Two-Temperature Approximation
Roman R. Rafikov, Fabio De Colle
Structure and spectral energy distributions (SEDs) of externally irradiated circumstellar disks are often computed on the basis of the two-temperature model of Chiang & Goldreich.…