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A Transmission Spectrum of the Sub-Earth Planet L98-59 b in 1.1-1.7 µm
Kostov, Veselin B.; Barclay, Thomas; Schlieder, Joshua E. +20 more
With the increasing number of planets discovered by the Transit Exoplanet Survey Satellite, the atmospheric characterization of small exoplanets is accelerating. L98-59 is an M-dwarf hosting a multiplanet system, and so far, four small planets have been confirmed. The innermost planet b is ~15% smaller and ~60% lighter than Earth, and should thus …
A Submillimeter Perspective on the GOODS Fields (SUPER GOODS). V. Deep 450 µm Imaging
Barger, A. J.; Cowie, L. L.; Jones, L. H. +1 more
We present deep SCUBA-2 450 µm imaging of the two GOODS fields, achieving a central rms of 1.14 mJy for the GOODS-N and 1.86 mJy for the GOODS-S. For each field, we give a catalog of >4σ detections (79 and 16 sources, respectively). We construct the 450 µm number counts, finding excellent agreement with others from the literature. W…
Evidence for the Late Arrival of Hot Jupiters in Systems with High Host-star Obliquities
Schlaufman, Kevin C.; Hamer, Jacob H.
It has been shown that hot Jupiters systems with massive, hot stellar primaries exhibit a wide range of stellar obliquities. On the other hand, hot Jupiter systems with low-mass, cool primaries often have stellar obliquities close to zero. Efficient tidal interactions between hot Jupiters and the convective envelopes present in lower-mass main-seq…
The evidence for unusually high hydrogen abundances in the central part of Valles Marineris on Mars
Mitrofanov, I.; Zelenyi, L.; Malakhov, A. +6 more
Studies of hydrogen deposition in the shallow Martian subsurface have been conducted by two neutron and one gamma-ray detectors in the past and provided global hydrogen maps (Boynton et al., 2002; Feldman et al., 2002; Mitrofanov et al., 2002). It is known from these maps that hydrogen is most abundant in the polar permafrost areas compared to the…
Relationship between Ca and Hα chromospheric emission in F-G-K stars: Indication of stellar filaments?
Kretzschmar, M.; Meunier, N.; Delfosse, X. +2 more
Context. Different relationships between the Hα and Ca II chromospheric emissions have been reported in solar-type stars. In particular, the time-series of emissions in these two lines are clearly anti-correlated for a few percent of the stars, contrary to what is observed on the Sun.
Aims: Our objective is to characterise these relationships…
The eROSITA Final Equatorial-Depth Survey (eFEDS). Variability catalogue and multi-epoch comparison
Schmitt, J. H. M. M.; Georgakakis, A.; Salvato, M. +10 more
The 140-square-degrees Final Equatorial-Depth Survey (eFEDS) field, observed with the extended ROentgen Survey with an Imaging Telescope Array (eROSITA) on board the Spectrum-Roentgen-Gamma mission, provides a first look at the variable eROSITA sky. We analysed the intrinsic X-ray variability of the eFEDS sources and provide X-ray light curves and…
Bulge formation inside quiescent lopsided stellar disks: Connecting accretion, star formation, and morphological transformation in a z ∼ 3 galaxy group
Daddi, Emanuele; Pety, Jérôme; Tan, Qinghua +10 more
We present well-resolved near-IR and submillimeter analysis of the three highly star-forming massive (> 1011 M⊙) galaxies within the core of the RO-1001 galaxy group at z = 2.91. Each of them displays kpc scale compact starbursting cores with properties consistent with forming galaxy bulges, embedded at the center of exten…
MiMO: Mixture Model for Open Clusters in Color-Magnitude Diagrams
Li, Lu; Shao, Zhengyi
We propose a mixture model of open clusters (OCs) in color-magnitude diagrams (CMDs) to measure the OC properties, including isochrone parameters (age, distance, metallicity, and dust extinction), stellar mass function (MF), and binary parameters (binary fraction and mass-ratio distribution), with high precision and reliability. The model treats a…
A census of OBe stars in nearby metal-poor dwarf galaxies reveals a high fraction of extreme rotators
Lennon, D. J.; Schootemeijer, A.; Langer, N. +3 more
The early Universe, together with many nearby dwarf galaxies, is deficient in heavy elements. The evolution of massive stars in such environments is thought to be affected by rotation. Extreme rotators among them tend to form decretion disks and manifest themselves as OBe stars. We use a combination of UB, Gaia, Spitzer, and Hubble Space Telescope…
The eccentric millisecond pulsar, PSR J0955−6150. I. Pulse profile analysis, mass measurements, and constraints on binary evolution
Camilo, F.; Possenti, A.; Kramer, M. +17 more
Context. PSR J0955−6150 is a member of an enigmatic class of eccentric millisecond pulsar (MSP) and helium white dwarf (He WD) systems (eMSPs), whose binary evolution is poorly understood and believed to be strikingly different to that of traditional MSP+He WD systems in circular orbits.
Aims: Measuring the masses of the stars in this system …