Galaxies lensing quadruply imaged quasars lie close to the centers of their lensing potentials

Kavli Affiliate: Paul L. Schechter | First 5 Authors: Paul L. Schechter, Richard Luhtaru, , , | Summary: In modeling the potentials of quadruply lensed quasars, investigators often employ models for the stellar surface brightness profile of the lensing galaxy for the sole purpose of eliminating its contamination of the light from the quasar images […]


Continue.. Galaxies lensing quadruply imaged quasars lie close to the centers of their lensing potentials

Witt’s hyperbola is both predicted and observed to pass close to the lensing galaxies in quadruple quasars

Kavli Affiliate: Paul L. Schechter | First 5 Authors: Paul L. Schechter, Richard Luhtaru, , , | Summary: When a rectangular hyperbola is constructed from the image positions of a quadruply lensed quasar, as proposed by Witt (1996), it passes very close to the the lensing galaxy. The median measured perpendicular offset between the observed […]


Continue.. Witt’s hyperbola is both predicted and observed to pass close to the lensing galaxies in quadruple quasars

A Search for Temporal Atmospheric Variability of $textit{Kepler}$ Hot Jupiters

Kavli Affiliate: Avi Shporer | First 5 Authors: Canis Li, Avi Shporer, , , | Summary: We perform a systematic search for atmospheric variability in short-period gas-giant planets (hot Jupiters) observed by the Kepler mission, by looking for temporal variability of their secondary eclipse depths. This is motivated by a recent detection of a decrease […]


Continue.. A Search for Temporal Atmospheric Variability of $textit{Kepler}$ Hot Jupiters

A Search for Temporal Atmospheric Variability of Kepler Hot Jupiters

Kavli Affiliate: Avi Shporer | First 5 Authors: Canis Li, Avi Shporer, , , | Summary: We perform a systematic search for atmospheric variability in short-period gas-giant planets (hot Jupiters) observed by the Kepler mission, by looking for temporal variability of their secondary eclipse depths. This is motivated by a recent detection of a decrease […]


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Signatures of tidal disruption of the Hercules ultra-faint dwarf galaxy

Kavli Affiliate: Anna Frebel | First 5 Authors: Xiaowei Ou, Anirudh Chiti, Nora Shipp, Joshua D. Simon, Marla Geha | Summary: The Hercules ultra-faint dwarf galaxy (UFD) has long been hypothesized to be tidally disrupting, yet no conclusive evidence has been found for tidal disruption owing partly to difficulties in identifying Hercules member stars. In […]


Continue.. Signatures of tidal disruption of the Hercules ultra-faint dwarf galaxy

Stellar Surface Magnetic Fields Impact Limb Darkening

Kavli Affiliate: Sara Seager | First 5 Authors: Nadiia M. Kostogryz, Alexander I. Shapiro, Veronika Witzke, Robert H. Cameron, Laurent Gizon | Summary: Stars appear darker at their limbs than at their disk centers because at the limb we are viewing the higher and cooler layers of stellar photospheres. Limb darkening derived from state-of-the-art stellar […]


Continue.. Stellar Surface Magnetic Fields Impact Limb Darkening

Stellar Surface Magnetic Fields Impact Limb Darkening

Kavli Affiliate: Sara Seager | First 5 Authors: Nadiia M. Kostogryz, Alexander I. Shapiro, Veronika Witzke, Robert H. Cameron, Laurent Gizon | Summary: Stars appear darker at their limbs than at their disk centers because at the limb we are viewing the higher and cooler layers of stellar photospheres. Limb darkening derived from state-of-the-art stellar […]


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Validation of a Third Planet in the LHS 1678 System

Kavli Affiliate: Roland Vanderspek | First 5 Authors: Michele L. Silverstein, Thomas Barclay, Joshua E. Schlieder, Karen A. Collins, Richard P. Schwarz | Summary: The nearby LHS 1678 (TOI-696) system contains two confirmed planets and a wide-orbit, likely-brown-dwarf companion, which orbit an M2 dwarf with a unique evolutionary history. The host star occupies a narrow […]


Continue.. Validation of a Third Planet in the LHS 1678 System

Validation of a Third Planet in the LHS 1678 System

Kavli Affiliate: Avi Shporer | First 5 Authors: Michele L. Silverstein, Thomas Barclay, Joshua E. Schlieder, Karen A. Collins, Richard P. Schwarz | Summary: The nearby LHS 1678 (TOI-696) system contains two confirmed planets and a wide-orbit, likely-brown-dwarf companion, which orbit an M2 dwarf with a unique evolutionary history. The host star occupies a narrow […]


Continue.. Validation of a Third Planet in the LHS 1678 System

Validation of a Third Planet in the LHS 1678 System

Kavli Affiliate: Sara Seager | First 5 Authors: Michele L. Silverstein, Thomas Barclay, Joshua E. Schlieder, Karen A. Collins, Richard P. Schwarz | Summary: The nearby LHS 1678 (TOI-696) system contains two confirmed planets and a wide-orbit, likely-brown-dwarf companion, which orbit an M2 dwarf with a unique evolutionary history. The host star occupies a narrow […]


Continue.. Validation of a Third Planet in the LHS 1678 System