Ngā hua rapu - Howard Isaacson
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FUOr-Aur 0544+3330: A New Young Stellar Object Outburst in the Outskirts of Auriga OB1, Viewed Face-on
I whakaputaina 2025-01-01Whiwhi kuputuhi katoaWe present a newly appreciated FU Ori outburst event that began in 2019 and reached a peak in early 2021. Suspected young stellar object WISE J054452.25+333009.6 experienced substantial brightening, in excess of −5 mag at optical wavelengths and −2.5 mag at mid-infrared wavelengths. The time from ne...
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Precise and Accurate Mass and Radius Measurements of Fifteen Galactic Red Giants in Detached Eclipsing Binaries
I whakaputaina 2025-02-01Whiwhi kuputuhi katoaPrecise and accurate mass and radius measurements of evolved stars are crucial to calibrating stellar models. Stars in detached eclipsing binaries (EBs) are excellent potential calibrators because their stellar parameters can be measured with fractional uncertainties of a few percent, independent of...
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Stellar Obliquity of the Ultra-short-period Planet System HD 93963
I whakaputaina 2025-01-01Whiwhi kuputuhi katoaWe report an observation of the Rossiter–McLaughlin (RM) effect of the transiting planet HD 93963 Ac, a mini-Neptune planet orbiting a G0-type star with an orbital period of P _c = 3.65 days, accompanied by an inner super-Earth planet with P _b = 1.04 days. We observed a full transit of planet c o...
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The Compositions of Rocky Planets in Close-in Orbits Tend to Be Earth-like
I whakaputaina 2025-01-01Whiwhi kuputuhi katoaHundreds of exoplanets between 1 and 1.8 times the size of Earth have been discovered on close-in orbits. However, these planets show such a diversity in densities that some appear to be made entirely of iron, while others appear to host gaseous envelopes. To test this diversity in composition, we u...
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Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. VI. Confirmation of a Long-period Giant Planet Discovered with a Single TESS Transit
I whakaputaina 2025-01-01Whiwhi kuputuhi katoaWe report the discovery and confirmation of TOI-4465 b, a 1.25 R _J ${}_{-0.07{R}_{{\rm{J}}}}^{+0.08{R}_{{\rm{J}}}}$ , 5.89 M _J ± 0.26 M _J giant planet orbiting a G dwarf star at d ≃ 122 pc. The planet was detected as a single-transit event in data from Sector 40 of the Transiting Exoplanet Surv...
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