Search Publications
Missions
Journals
Publication Years
Deflating Super-puffs: Impact of Photochemical Hazes on the Observed Mass-Radius Relationship of Low-mass Planets
Zhang, Xi; Gao, Peter
The observed mass-radius relationship of low-mass planets informs our understanding of their composition and evolution. Recent discoveries of low-mass, large-radius objects ("super-puffs") have challenged theories of planet formation and atmospheric loss, as their high inferred gas masses make them vulnerable to runaway accretion and hydrodynamic …
Hydrodynamic Response of the Intergalactic Medium to Reionization
Trac, Hy; Cain, Christopher; D'Aloisio, Anson +2 more
The intergalactic medium is expected to clump on scales down to ${10}^{4}\mbox{--}{10}^{8}$ M⊙ before the onset of reionization. The impact of these small-scale structures on reionization is poorly understood despite the modern understanding that gas clumpiness limits the growth of ${\rm{H}}\,{\rm{II}}$ regions. We use a suite of radiat…
Discovery of a Gamma-Ray Black Widow Pulsar by GPU-accelerated Einstein@Home
Dhillon, V. S.; Freire, P.; Camilo, F. +39 more
We report the discovery of 1.97 ms period gamma-ray pulsations from the 75 minute orbital-period binary pulsar now named PSR J1653-0158. The associated Fermi Large Area Telescope gamma-ray source 4FGL J1653.6-0158 has long been expected to harbor a binary millisecond pulsar. Despite the pulsar-like gamma-ray spectrum and candidate optical/X-ray as…
The Cosmic Ultraviolet Baryon Survey (CUBS) - I. Overview and the diverse environments of Lyman limit systems at z < 1
Weiner, Benjamin J.; Faucher-Giguère, Claude-André; Johnson, Sean D. +19 more
We present initial results from the Cosmic Ultraviolet Baryon Survey (CUBS). CUBS is designed to map diffuse baryonic structures at redshift z ≲ 1 using absorption-line spectroscopy of 15 UV-bright QSOs with matching deep galaxy survey data. CUBS QSOs are selected based on their NUV brightness to avoid biases against the presence of intervening Ly…
Quasi-Periodic Pulsations in Solar and Stellar Flares. Review
Kolotkov, Dmitrii; Kupriyanova, Elena; Nakariakov, Valery +1 more
This paper provides an overview of the state-of-the-art studies of oscillatory processes in solar and stellar flares, based on modern observational data from ground-based and space-borne instruments with high temporal, spatial, and spectral resolution in different bands of the electromagnetic spectrum. We examine the mecha-nisms that generate flar…
Precise radio astrometry and new developments for the next-generation of instruments
Rioja, María J.; Dodson, Richard
We present a technique-led review of the progression of precise radio astrometry, from the first demonstrations, half a century ago, until to date and into the future. We cover the developments that have been fundamental to allow high accuracy and precision astrometry to be regularly achieved. We review the opportunities provided by the next gener…
Probing the size and charge of polycyclic aromatic hydrocarbons
Peeters, E.; Maragkoudakis, A.; Ricca, A.
We present a new method to accurately describe the ionization fraction and the size distribution of polycyclic aromatic hydrocarbons (PAHs) within astrophysical sources. To this purpose, we have computed the mid-infrared emission spectra of 308 PAH molecules of varying sizes, symmetries, and compactness, generated in a range of radiation fields. W…
An ultrahot Neptune in the Neptune desert
Jackman, James A. G.; Bieryla, Allyson; Latham, David W. +81 more
About 1 out of 200 Sun-like stars has a planet with an orbital period shorter than one day: an ultrashort-period planet1,2. All of the previously known ultrashort-period planets are either hot Jupiters, with sizes above 10 Earth radii (R⊕), or apparently rocky planets smaller than 2 R⊕. Such lack of planets of inte…
Optical phase curve of the ultra-hot Jupiter WASP-121b
Heng, K.; Ehrenreich, D.; Lendl, M. +28 more
We present the analysis of TESS optical photometry of WASP-121b, which reveals the phase curve of this transiting ultra-hot Jupiter. Its hotspot is located at the sub-stellar point, showing inefficient heat transport from the dayside (2870 ± 50 K) to the nightside (<2500 K at 3σ) at the altitudes probed by TESS. The TESS eclipse depth, measured…
Solar System Objects Observed with TESS—First Data Release: Bright Main-belt and Trojan Asteroids from the Southern Survey
Pál, András; Kalup, Csilla; Szakáts, Róbert +10 more
Compared with previous space-borne surveys, the Transiting Exoplanet Survey Satellite (TESS) provides a unique and new approach to observe solar system objects. While its primary mission avoids the vicinity of the ecliptic plane by approximately six degrees, the scale height of the solar system debris disk is large enough to place various small bo…