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An ultra-short period rocky super-Earth orbiting the G2-star HD 80653
Vanderburg, A.; Poretti, E.; Sozzetti, A. +26 more
Ultra-short period (USP) planets are a class of exoplanets with periods shorter than one day. The origin of this sub-population of planets is still unclear, with different formation scenarios highly dependent on the composition of the USP planets. A better understanding of this class of exoplanets will, therefore, require an increase in the sample…
Assessing spectra and thermal inversions due to TiO in hot Jupiter atmospheres
Madhusudhan, Nikku; Gandhi, Siddharth; Masseron, Thomas +3 more
Recent detections of thermal inversions in the dayside atmospheres of some hot Jupiters are motivating new avenues to understand the interplay between their temperature structures and other atmospheric conditions. In particular, TiO has long been proposed to cause thermal inversions in hot Jupiters, depending on other factors such as stellar irrad…
AME: A Cross-scale Constellation of CubeSats to Explore Magnetic Reconnection in the Solar-Terrestrial Relation
Dunlop, Malcolm; Khotyaintsev, Yuri; Phan, Tai +25 more
A major subset of solar-terrestrial relations, responsible in particular for the driver of space weather phenomena, is the interaction between the Earth's magnetosphere and the solar wind. As one of the most important modes of the solar-wind-magnetosphere interaction, magnetic reconnection regulates the energy transport and energy release in the s…
SCExAO/CHARIS High-contrast Imaging of Spirals and Darkening Features in the HD 34700 A Protoplanetary Disk
Currie, Thayne; Kwon, Jungmi; Tamura, Motohide +27 more
We present Subaru/SCExAO+Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS) broadband (JHK-band) integral field spectroscopy of HD 34700 A. CHARIS data recover HD 34700 A's disk ring and confirm multiple spirals discovered by Monnier et al. We set limits on substellar companions of ∼12 MJup at 0"3 (in the ring gap) and …
Constraining the radial drift of millimeter-sized grains in the protoplanetary disks in Lupus
Williams, J. P.; Ansdell, M.; Facchini, S. +5 more
Context. Recent ALMA surveys of protoplanetary disks have shown that for most disks the extent of the gas emission is greater than the extent of the thermal emission of millimeter-sized dust. Both line optical depth and the combined effect of radially dependent grain growth and radial drift may contribute to this observed effect. To determine whet…
Supernova Interaction with a Dense Detached Shell in SN 2001em
Chandra, Poonam; Fransson, Claes; Chevalier, Roger A. +2 more
We carry out a comprehensive analysis of supernova SN 2001em covering a period of 19 yr since discovery. SN 2001em is the oldest supernova known to have undergone a metamorphosis from a stripped envelope to an interacting supernova. An early spectrum indicates it exploded as a Type Ib supernova. Later, the ejecta caught up with a dense circumstell…
ACCESS: A Visual to Near-infrared Spectrum of the Hot Jupiter WASP-43b with Evidence of H2O, but No Evidence of Na or K
Kirk, James; López-Morales, Mercedes; Alam, Munazza K. +11 more
We present a new ground-based visual transmission spectrum of the hot Jupiter WASP-43b, obtained as part of the ACCESS Survey. The spectrum was derived from four transits observed between 2015 and 2018, with combined wavelength coverage between 5300 and 9000 Å and an average photometric precision of 708 ppm in 230 Å bins. We perform an atmospheric…
Multiplicity of the red supergiant population in the young massive cluster NGC 330
Lennon, D. J.; Herrero, A.; de Koter, A. +7 more
Context. The multiplicity properties of massive stars are one of the important outstanding issues in stellar evolution. Quantifying the binary statistics of all evolutionary phases is essential to paint a complete picture of how and when massive stars interact with their companions, and to determine the consequences of these interactions.
Aim…
SHARP - VI. Evidence for CO (1-0) molecular gas extended on kpc-scales in AGN star-forming galaxies at high redshift
Vegetti, S.; McKean, J. P.; Rizzo, F. +8 more
We present a study of the stellar host galaxy, CO (1-0) molecular gas distribution and AGN emission on 50-500 pc-scales of the gravitationally lensed dust-obscured AGN MG J0751+2716 and JVAS B1938+666 at redshifts 3.200 and 2.059, respectively. By correcting for the lensing distortion using a grid-based lens modelling technique, we spatially locat…
PSR J1641+3627F: A Low-mass He White Dwarf Orbiting a Possible High-mass Neutron Star in the Globular Cluster M13
Cadelano, Mario; Pallanca, Cristina; Salaris, Maurizio +5 more
We report on the discovery of the companion star to the millisecond pulsar J1631+3627F in the globular cluster M13. By means of a combination of optical and near-UV high-resolution observations obtained with the Hubble Space Telescope, we identified the counterpart at the radio source position. Its location in the color-magnitude diagrams reveals …