Search Publications
TIC 290061484: A Triply Eclipsing Triple System with the Shortest Known Outer Period of 24.5 Days
Mitnyan, T.; Pál, A.; Vanderburg, A. +13 more
We have discovered a triply eclipsing triple-star system, TIC 290061484, with the shortest known outer period, P out, of only 24.5 days. This "eclipses" the previous record set by λ Tauri at 33.02 days, which held for 68 yr. The inner binary, with an orbital period of P in = 1.8 days, produces primary and secondary eclipses a…
Ages of Stars and Planets in the Kepler Field Younger than Four Billion Years
Howard, Andrew W.; Bouma, Luke G.; Hillenbrand, Lynne A. +3 more
Recent analyses of FGK stars in open clusters have helped clarify the precision with which a star's rotation rate and lithium content can be used as empirical indicators for its age. Here we apply this knowledge to stars observed by Kepler. Rotation periods are drawn from previous work; lithium is measured from new and archival Keck/HIRES spectra.…
JWST/NIRISS and HST: Exploring the improved ability to characterize exoplanet atmospheres in the JWST era
Parmentier, Vivien; Taylor, Jake; Radica, Michael +6 more
The Hubble Space Telescope has been a pioneering instrument for studying the atmospheres of exoplanets, specifically its WFC3 and STIS instruments. With the launch of JWST, we are able to observe larger spectral ranges at higher precision. NIRISS/SOSS covers the range 0.6-2.8 microns, and thus, it can serve as a direct comparison to WFC3 (0.8-1.7 …
A population of Optically Quiescent Quasars from WISE and SDSS
Gandhi, Poshak; Stern, Daniel; Toba, Yoshiki +4 more
The growth of active galactic nuclei (AGNs) occurs under some form of obscuration in a large fraction of the population. The difficulty in constraining this population leads to high uncertainties in cosmic X-ray background and galaxy evolution models. Using an SDSS-WISE cross-match, we target infrared luminous AGN (W1 - W2 > 0.8, and monochroma…
Long-term Study of the 2020 Magnetar-like Outburst of the Young Pulsar PSR J1846-0258 in Kes 75
Campana, S.; Tiengo, A.; Götz, D. +14 more
Magnetar-like activity has been observed in a large variety of neutron stars. PSR J1846‑0258 is a young 327 ms radio-quiet pulsar with a large rotational power (∼8 × 1036 erg s‑1), and resides at the center of the supernova remnant Kes 75. It is one of the rare examples of a high-magnetic-field pulsar showing characteristics …
Improved model of the Supernova Refsdal cluster MACS J1149.5+2223 thanks to VLT/MUSE
Grillo, C.; Rosati, P.; Stiavelli, M. +9 more
We present new VLT/MUSE observations of the Hubble Frontier Field (HFF) galaxy cluster MACS J1149.5+2223, lensing the well-known supernova "Refsdal" into multiple images, which has enabled the first cosmological applications with a strongly lensed supernova. Thanks to these data, targeting a northern region of the cluster and thus complementing ou…
TOI-837 b is a young Saturn-sized exoplanet with a massive 70 M⊕ core
Aigrain, Suzanne; Gillen, Edward; Mortier, Annelies +10 more
We present an exhaustive photometric and spectroscopic analysis of TOI-837, a F9/G0 35 Myr young star, hosting a transiting exoplanet, TOI-837 b, with an orbital period of ~8.32 d. Utilizing data from the Transiting Exoplanet Survey Satellite and ground-based observations, we determine a planetary radius of $0.818_{-0.024}^{+0.034}$ RJ …
Identifying 850 δ Scuti pulsators in a narrow Gaia colour range with TESS 10-min full-frame images
Li, Yaguang; Bedding, Timothy R.; Murphy, Simon J. +7 more
We use TESS 10-min full-frame images (Sectors 27-55) to study a sample of 1708 stars within 500 pc of the Sun that lie in a narrow colour range in the centre of the δ Scuti instability strip (0.29 < GBP - GRP < 0.31). Based on the Fourier amplitude spectra, we identify 848 δ Scuti stars, as well as 47 eclipsing or conta…
Signatures of gas flows - II. Connecting the kinematics of the multiphase circumgalactic medium to galaxy rotation
Charlton, Jane C.; Kacprzak, Glenn G.; Churchill, Christopher W. +4 more
The multiphase circumgalactic medium (CGM) hosts critical processes that affect galaxy evolution such as accretion and outflows. We searched for evidence of these phenomena by using the EW co-rotation fraction (
At the end of cosmic noon: Short gas depletion times in unobscured quasars at z ∼ 1
Rybak, M.; McKean, J. P.; van der Werf, P. +8 more
Unobscured quasars (QSOs) are predicted to be the final stage in the evolutionary sequence from gas-rich mergers to gas-depleted, quenched galaxies. Studies of this population, however, find a high incidence of far-infrared-luminous sources-suggesting significant dust-obscured star formation-but direct observations of the cold molecular gas fuelli…