JWST unveils a high mean molecular weight atmosphere for mini-Neptune TOI-1130b: Evidence for formation beyond the water ice line

Posted by klaurent MIT

Kavli Affiliate: Andrew Vanderburg | Summary:We present the combined JWST/NIRSpec G395H and NIRISS SOSS transmission spectrum of a warm mini-Neptune, TOI-1130b (3.66 R$_oplus$, 19.8 M$_oplus$, $T_eqsim825$ K). It is part of a rare and unique multi-planet system TOI-1130, which hosts an inner mini-Neptune and an outer hot Jupiter locked in a 2:1 mean motion resonance. […]


Continue.. JWST unveils a high mean molecular weight atmosphere for mini-Neptune TOI-1130b: Evidence for formation beyond the water ice line

A Comprehensive Study of Morphology and Kinematics in Extended Nebulae Around UV Luminous Quasars at $zapprox1$

Posted by klaurent Chicago

Kavli Affiliate: Hsiaowen Chen |Summary:Gas flows between galaxies and the circumgalactic medium (CGM) play a central role in galaxy evolution and can become observable as giant nebulae when illuminated by the quasars. We present an ensemble study of nebulae around 30 UV-luminous quasars at $zapprox0.4-1.4$ from the CUBS and MUSEQuBES surveys, 27 of which are […]


Continue.. A Comprehensive Study of Morphology and Kinematics in Extended Nebulae Around UV Luminous Quasars at $zapprox1$

Compositionally tuned phase transformations enhance pyroelectric energy harvesting from low-grade heat

Posted by klaurent Peking

Kavli Affiliate: Xian Chen| Summary: Phase-transforming pyroelectric materials have emerged as promising candidates for low-grade thermal energy harvesting. However, whether first-order transformations with large pyroelectric coefficient or second-order transformations with better reversibility are preferable remains unclear. Here we report compositionally tunable phase transformations in Ba$_1-x$Sr$_x$TiO$_3$ ($x in [0, 0.3]$), revealing evolution from first-order to second-order […]


Continue.. Compositionally tuned phase transformations enhance pyroelectric energy harvesting from low-grade heat

Generalized continuum theory of phonon angular momentum in crystals

Posted by klaurent UCAS

Kavli Affiliate: Mamoru Matsuo | Summary:We formulate a generalized continuum theory of phonon angular momentum in crystals by introducing a local SO(3) material frame in addition to the macroscopic displacement field. The local frame represents rotational optical degrees of freedom of the unit cell and brings acoustic displacement modes and optical rotational modes into a […]


Continue.. Generalized continuum theory of phonon angular momentum in crystals