Search Publications
The Featherweight Giant: Unraveling the Atmosphere of a 17 Myr Planet with JWST
Vanderburg, Andrew; Batalha, Natasha E.; Brown, Alexander +29 more
The characterization of young planets (<300 Myr) is pivotal for understanding planet formation and evolution. We present the 3–5 µm transmission spectrum of the 17 Myr, Jupiter-size (R ∼10R ⊕) planet, HIP 67522b, observed with JWST NIRSpec/G395H. To check for spot contamination, we obtain a simultaneous g-band transit with the …
Estimating Microlensing Parameters from Observables and Stellar Isochrones with pyLIMASS
Bachelet, E.; Hundertmark, M.; Calchi Novati, S.
We present pyLIMASS, a novel algorithm for estimating the physical properties of the lensing system in microlensing events. The main idea of pyLIMASS is to combine all available information regarding the microlensing event, defined as observables, and to estimate the parameter distributions of the system, such as the lens mass and distance. The al…
TOI 762 A b and TIC 46432937 b: Two Giant Planets Transiting M-dwarf Stars
Triaud, Amaury H. M. J.; Jordán, Andrés; Brahm, Rafael +33 more
We present the discovery of TOI 762 A b and TIC 46432937 b, two giant planets transiting M-dwarf stars. Transits of both systems were first detected from observations by the NASA TESS mission, and the transiting objects are confirmed as planets through high-precision radial velocity observations carried out with Very Large Telescope/ESPRESSO. TOI …
Detection of Contact Binary Candidates Observed By TESS Using the Autoencoder Neural Network
Ding, Xu; Ji, KaiFan; Song, ZhiMing +1 more
A contact binary may be the progenitor of a red nova that eventually produces a merger event and have a cut-off period of around 0.2 days. Therefore, a large number of contact binaries is needed to search for the progenitor of red novae and to study the characteristics of short-period contact binaries. In this paper, we employ the Phoebe program t…
CLusters in the Uv as EngineS (CLUES). II. Subkiloparsec-scale Outflows Driven by Stellar Feedback
Hayes, Matthew; Chisholm, John; Östlin, Göran +17 more
We analyze the far-ultraviolet (1130‑1770 Å rest frame) spectroscopy of 20 young (<50 Myr) and massive (>104 M ⊙) star clusters (YSCs) in 11 nearby star-forming galaxies. We probe the interstellar gas intervening along the line of sight, detecting several metal absorption lines of a wide range of ionization potentials, …
Imaging of I Zw 18 by JWST. I. Detecting Dusty Stellar Populations
Hirschauer, Alec S.; Boyer, Martha L.; Östlin, Göran +17 more
We present a JWST imaging survey of I Zw 18, the archetypal extremely metal-poor, star-forming (SF), blue compact dwarf galaxy. With an oxygen abundance of only ∼3% Z ⊙, it is among the lowest-metallicity systems known in the local Universe, and is, therefore, an excellent accessible analog for the galactic building blocks which existed…
The Outflow of The Protostar in B335. I.
Johnstone, Doug; Rieke, George; Rieke, Marcia J. +10 more
The isolated globule B335 contains a single, low-luminosity Class 0 protostar associated with a bipolar nebula and outflow system seen nearly perpendicular to its axis. We observed the innermost regions of this outflow as part of JWST/NIRCam Guaranteed Time Observations program 1187, primarily intended for wide-field slitless spectroscopy of backg…
Surviving in the Hot-Neptune Desert: The Discovery of the Ultrahot Neptune TOI-3261b
Quinn, Samuel N.; Fernández Fernández, Jorge; Wheatley, Peter J. +45 more
The recent discoveries of Neptune-sized ultra-short-period planets (USPs) challenge existing planet formation theories. It is unclear whether these residents of the Hot Neptune Desert have similar origins to smaller, rocky USPs, or if this discrete population is evidence of a different formation pathway altogether. We report the discovery of TOI-3…
Beyond Point Masses. II. Non-Keplerian Shape Effects Are Detectable in Several TNO Binaries
Grundy, Will; Suggs, Christiana Z.; Proudfoot, Benjamin C. N. +60 more
About 40 trans-Neptunian binaries (TNBs) have fully determined orbits with about 10 others being solved except for breaking the mirror ambiguity. Despite decades of study, almost all TNBs have only ever been analyzed with a model that assumes perfect Keplerian motion (e.g., two point masses). In reality, all TNB systems are non-Keplerian due to no…
The TESS-Keck Survey. XII. A Dense 1.8 R ⊕ Ultra-short-period Planet Possibly Clinging to a High-mean-molecular-weight Atmosphere after the First Gigayear
Batalha, Natalie M.; Mayo, Andrew W.; Rice, Malena +39 more
The extreme environments of ultra-short-period planets (USPs) make excellent laboratories to study how exoplanets obtain, lose, retain, and/or regain gaseous atmospheres. We present the confirmation and characterization of the USP TOI-1347 b, a 1.8 ± 0.1 R ⊕ planet on a 0.85 day orbit that was detected with photometry from the TESS miss…