Search Publications
Migration and Evolution of giant ExoPlanets (MEEP). I. Nine Newly Confirmed Hot Jupiters from the TESS Mission
Lester, Kathryn V.; Bieryla, Allyson; Latham, David W. +72 more
Hot Jupiters were many of the first exoplanets discovered in the 1990s, but in the decades since their discovery the mysteries surrounding their origins have remained. Here we present nine new hot Jupiters (TOI-1855 b, TOI-2107 b, TOI-2368 b, TOI-3321 b, TOI-3894 b, TOI-3919 b, TOI-4153 b, TOI-5232 b, and TOI-5301 b) discovered by NASA's TESS miss…
Three super-Earths and a possible water world from TESS and ESPRESSO
Bouchy, F.; Rebolo, R.; Allende Prieto, C. +52 more
Context. Since 2018, the ESPRESSO spectrograph at the VLT has been hunting for planets in the southern skies via the radial velocity (RV) method. One of its goals is to follow up on candidate planets from transit surveys such as the TESS mission, with a particular focus on small planets for which ESPRESSO's RV precision is vital.
Aims: We aim…
JWST View of Four Infant Galaxies at z = 8.31–8.49 in the MACS J0416.1‑2403 Field and Implications for Reionization
Grogin, Norman A.; Hathi, Nimish P.; Koekemoer, Anton M. +35 more
New JWST/NIRCam wide-field slitless spectroscopy provides redshifts for four z > 8 galaxies located behind the lensing cluster MACS J0416.1‑2403. Two of them, "Y1" and "JD," have previously reported spectroscopic redshifts based on Atacama Large Millimeter/submillimeter Array measurements of [O III] 88 µm and/or [C II] 157.7 µm line…
The Molecular Clouds of M31
Forbrich, Jan; Lada, Charles J.; Petitpas, Glen +1 more
Deep interferometric observations of CO and dust continuum emission are obtained with the Submillimeter Array at 230 GHz to investigate the physical nature of the giant molecular cloud (GMC) population in the Andromeda galaxy (M31). We use J = 2 ‑ 1 12CO and 13CO emission to derive the masses, sizes, and velocity dispersions …
Characterization of the δ Scuti eclipsing binary KIC 4851217 and its tertiary companion as well as detection of tidally tilted pulsations
Handler, G.; Southworth, J.; Kurtz, D. W. +3 more
Stellar theory enables us to understand the properties of stars at different stages of their evolution, and contributes to other fields of astrophysics such as galactic and exoplanet studies. Assessing the accuracy of stellar theories necessitates high precision, model-independent measurements of the properties of real stars, such as those obtaina…
Deeper than DEEP: a spectroscopic survey of z > 3 Ly α emitters in the Extended Groth Strip
Finkelstein, Steven L.; Pérez-González, Pablo G.; Bagley, Micaela B. +13 more
We present a spectroscopic survey of Ly α emitters in the Extended Groth Strip (EGS) field, targeting the regime near the Epoch of Reionization. Using Keck/DEep Imaging Multi-Object Spectrograph, we observed 947 high-z candidates with photometric redshifts from 3 < zphot < 7 and down to an H-band (Hubble Space Telescope/Wide Field…
Decomposing the AIA 304 Å Channel into Its Cool and Hot Components
Antolin, Patrick; Auchère, Frédéric; Soubrié, Elie +2 more
The AIA 304 Å channel on board the Solar Dynamics Observatory (SDO) offers a unique view of ≈105 K plasma emitting in the He II 304 Å line. However, when observing off-limb, the emission of the (small) cool structures in the solar atmosphere (such as spicules, coronal rain and prominence material) can be of the same order as the surrounding hot co…
Simultaneous NICER and NuSTAR observations of the ultraluminous source NGC 4190 ULX-1
Martí, Josep; García, Federico; Fogantini, Federico A. +6 more
Aims: We present an X-ray analysis of three different XMM-Newton observations together with simultaneous NICER and NuSTAR observations of the ultraluminous X-ray source NGC 4190 ULX-1. Our goal is to constrain the structure of the accretion disk and the geometrical properties of the source.
Methods: We performed temporal and spectral ana…
The origin of the soft excess in the luminous quasar HE 1029-1401
Bianchi, S.; Piconcelli, E.; Matt, G. +7 more
The enigmatic and intriguing phenomenon of the "soft excess" observed in the X-ray spectra of luminous quasars continues to be a subject of considerable interest and debate in the field of high-energy astrophysics. This study focuses on the quasar HE 1029-1401 (z = 0.086, log(Lbol/[erg s‑1]) = 46.0 ± 0.2), with a particular e…
Unveiling the origin of the optical and UV emission during the 2017 giant outburst of the Galactic ULX pulsar Swift J0243.6+6124
Mas-Hesse, J. M.; van den Eijnden, J.; Reig, P. +8 more
Context. From late September 2017 to January 2018, the Be X-ray binary (BeXB) Swift J0243.6+6124 underwent a giant outburst that was unprecedently bright. The reported X-ray luminosities were so high that the system was classified as an ultraluminous X-ray source (ULX). It was also the first BeXB pulsar to show radio jet emission. The source was n…