We present an investigation of spin-orbit angles for planetary system candidates reported by Kepler. By combining the rotational period Ps inferred from the flux variation due to starspots and the projected rotational velocity Vsin Is and stellar radius obtained by a high-resolution spectroscopy, we...
Comparison with local data for other galaxies as well as the Milky Way showed that the abundance gradients probably evolve over time within extended disk galaxies such that the gradient is much steeper at earlier times and then flattens at later times as the radius of the galaxy increases (...
The circles have a radius of 1″. The progenitor has dramatically faded in the optical but there is still faint near-IR emission. Reproduced from ref. (Adams et al., 2016a). (8b) N6946-BH1 light curves from HST (large circles), Spitzer Space telescope (SST, squares), Large Binocular...
We derive a reliable bolometric light curve that indicates that the shock breaks out from a dense layer with a radius substantially larger than typical supergiants. This is a preview of subscription content, access via your institution Access options Access Nature and 54 other Nature Portfolio ...
It can be clearly seen that while the X-ray temperature is an order of magnitude higher, it is not enough to explain the observed UV/optical emission, suggesting physically distinct emission components at the two bands arising probably from different locations. The blackbody radius inferred from ...
The sun is composed of gas. It has no solid surface. However, it still has a defined structure. The three major structural areas of the sun are shown in the upper half of Figure 1. They include: Core: The center of the sun, comprising 25 percent of its radius. Radiative zone: The ...
The high-cadence full-Sun view of SDO’s AIA revealed connections between activity in distant regions: filament eruptions or flux emergence in one location can deform the magnetic configuration sometimes more than a solar radius away. Combined with the full-Sun field models and STEREO EUVI observa...
Liffman K (2003) The gravitational radius of an irradiated disk. Publ Astron Soc Aust 20:337–339. doi:10.1071/AS03019 Article ADS Google Scholar Lin DNC, Papaloizou JCB (1986) On the tidal interaction between protoplanets and the protoplanetary disk. III—Orbital migration of protoplanets...
Staggering as they may seem to us, interplanetary distances are puny compared to those to reach stars. Our Solar System is located about two-thirds of the way from the center of our Milky Way Galaxy to the rim, about 25,000 light-years from the galactic center on the inner edge of the...
We discuss how recent advances in observations, theory and numerical simulations have allowed the stellar community to progress in its understanding of ste