Search Publications
New Determinations of the UV Luminosity Functions from z 9 to 2 Show a Remarkable Consistency with Halo Growth and a Constant Star Formation Efficiency
Oesch, P. A.; Bouwens, R. J.; Reddy, N. +9 more
Here we provide the most comprehensive determinations of the rest-frame UV luminosity function (LF) available to date with the Hubble Space Telescope (HST) at z ~ 2-9. Essentially all of the noncluster extragalactic legacy fields are utilized, including the Hubble Ultra Deep Field, the Hubble Frontier Fields parallel fields, and all five CANDELS f…
The Detection and Characterization of Be+sdO Binaries from HST/STIS FUV Spectroscopy
Gies, Douglas R.; Lester, Kathryn V.; Wang, Luqian +4 more
The B emission-line stars are rapid rotators that were probably spun up by mass and angular momentum accretion through mass transfer in an interacting binary. Mass transfer will strip the donor star of its envelope to create a small and hot subdwarf remnant. Here we report on Hubble Space Telescope/STIS far-ultraviolet spectroscopy of a sample of …
The Extragalactic Distance Database: The Color-Magnitude Diagrams/Tip of the Red Giant Branch Distance Catalog
Dolphin, Andrew E.; Wu, Po-Feng; Anand, Gagandeep S. +7 more
The Extragalactic Distance Database (EDD) was created as a repository for high-quality, redshift-independent distances. A key component of EDD is the Color-Magnitude Diagrams/Tip of the Red Giant Branch (CMDs/TRGB) catalog, which provides information on the stellar content of nearby galaxies observed with the Hubble Space Telescope (HST). Here we …
Hubble WFC3 Spectroscopy of the Habitable-zone Super-Earth LHS 1140 b
Changeat, Quentin; Mori, Mayuko; Edwards, Billy +7 more
Atmospheric characterization of temperate, rocky planets is the holy grail of exoplanet studies. These worlds are at the limits of our capabilities with current instrumentation in transmission spectroscopy and challenge our state-of-the-art statistical techniques. Here we present the transmission spectrum of the temperate super-Earth LHS 1140b usi…
Detection of an Atmosphere on a Rocky Exoplanet
Sotin, Christophe; West, Robert; Zellem, Robert T. +7 more
We report the detection of an atmosphere on a rocky exoplanet, GJ 1132 b, which is similar to Earth in terms of size and density. The atmospheric transmission spectrum was detected using Hubble WFC3 measurements and shows spectral signatures of aerosol scattering, HCN, and CH4 in a low mean molecular weight atmosphere. We model the atmo…
Improved Dynamical Masses for Six Brown Dwarf Companions Using Hipparcos and Gaia EDR3
Currie, Thayne; Dupuy, Trent J.; Bowler, Brendan P. +8 more
We present comprehensive orbital analyses and dynamical masses for the substellar companions Gl 229 B, Gl 758 B, HD 13724 B, HD 19467 B, HD 33632 Ab, and HD 72946 B. Our dynamical fits incorporate radial velocities, relative astrometry, and, most importantly, calibrated Hipparcos-Gaia EDR3 accelerations. For HD 33632 A and HD 72946 we perform thre…
TESS Observations of the WASP-121 b Phase Curve
Mikal-Evans, Thomas; Sing, David K.; Kane, Stephen R. +23 more
We study the red-optical photometry of the ultrahot Jupiter WASP-121 b as observed by the Transiting Exoplanet Survey Satellite (TESS) and model its atmosphere through a radiative transfer simulation. Given its short orbital period of ∼1.275 days, inflated state, and bright host star, WASP-121 b is exceptionally favorable for detailed atmospheric …
ARES. V. No Evidence For Molecular Absorption in the HST WFC3 Spectrum of GJ 1132 b
Drossart, Pierre; Bouwman, Jeroen; Blain, Doriann +25 more
We present a study on the spatially scanned spectroscopic observations of the transit of GJ 1132 b, a warm (∼500 K) super-Earth (1.13 R⊕) that was obtained with the G141 grism (1.125-1.650 µm) of the Wide Field Camera 3 (WFC3) on board the Hubble Space Telescope. We used the publicly available Iraclis pipeline to extract the plane…
On the Compatibility of Ground-based and Space-based Data: WASP-96 b, an Example
Changeat, Quentin; Chubb, Katy L.; Edwards, Billy +5 more
The study of exoplanetary atmospheres relies on detecting minute changes in the transit depth at different wavelengths. To date, a number of ground- and space-based instruments have been used to obtain transmission spectra of exoplanets in different spectral bands. One common practice is to combine observations from different instruments in order …
Visible-light Phase Curves from the Second Year of the TESS Primary Mission
Kane, Stephen R.; Fetherolf, Tara; Vanderspek, Roland +10 more
We carried out a systematic study of full-orbit phase curves for known transiting systems in the northern ecliptic sky that were observed during Year 2 of the TESS primary mission. We applied the same methodology for target selection, data processing, and light-curve fitting as we did in our Year 1 study. Out of the 15 transiting systems selected …