Search Publications
A Multiwavelength Look at the GJ 9827 System: No Evidence of Extended Atmospheres in GJ 9827b and d from HST and CARMENES Data
Ayres, Thomas R.; Redfield, Seth; Youngblood, Allison +18 more
GJ 9827 is a bright star hosting a planetary system with three transiting planets. As a multiplanet system with planets that sprawl within the boundaries of the radius gap between terrestrial and gaseous planets, GJ 9827 is an optimal target to study the evolution of the atmospheres of close-in planets with a common evolutionary history and their …
Scaling K2. IV. A Uniform Planet Sample for Campaigns 1-8 and 10-18
Schlieder, Joshua E.; Petigura, Erik A.; Crossfield, Ian J. M. +6 more
We provide the first full K2 transiting exoplanet sample, using photometry from Campaigns 1-8 and 10-18, derived through an entirely automated procedure. This homogeneous planet candidate catalog is crucial to perform a robust demographic analysis of transiting exoplanets with K2. We identify 747 unique planet candidates and 57 multiplanet systems…
Sunspot tilt angles revisited: Dependence on the solar cycle strength
Jiang, Jie; Jiao, Qirong; Wang, Zi-Fan
Context. The tilt angle of sunspot groups is crucial in the Babcock-Leighton (BL) type dynamo for the generation of the poloidal magnetic field. Some studies have shown that the tilt coefficient, which excludes the latitudinal dependence of the tilt angles, is anti-correlated with the cycle strength. If the anti-correlation exists, it will be show…
The Cosmic Ultraviolet Baryon Survey (CUBS) - IV. The complex multiphase circumgalactic medium as revealed by partial Lyman limit systems
Faucher-Giguère, Claude-André; Johnson, Sean D.; Petitjean, Patrick +18 more
We present a detailed study of two partial Lyman limit systems (pLLSs) of neutral hydrogen column density $N_\mathrm{H\, I}\approx (1-3)\times 10^{16}\, \mathrm{cm}^{-2}$ discovered at $z$ = 0.5 in the Cosmic Ultraviolet Baryon Survey (CUBS). Available far-ultraviolet spectra from the Hubble Space Telescope Cosmic Origins Spectrograph and optical …
Which Milky Way masses are consistent with the slightly declining 5-25 kpc rotation curve?
Hammer, F.; Jiao, Y.; Wang, J. L. +1 more
Context. Discoveries of extended rotation curves have suggested that spiral galaxy halos contain dark matter. This has led to many studies that estimated the total mass of the Galaxy, mostly using the Navarro, Frenk, and White (NFW) density profile.
Aims: We determine the effect that the choice of the dark matter profile has on the predicted …
Testing Primordial Black Holes with multi-band observations of the stochastic gravitational wave background
García-Bellido, Juan; Kuroyanagi, Sachiko; Braglia, Matteo
The mass distribution of Primordial Black Holes (PBHs) is affected by drops in the pressure of the early Universe plasma. For example, events in the standard model of particle physics, such as the W ±/Z 0 decoupling, the quark-hadron transition, the muon and pion becoming non-relativistic, and the annihilation of electrons an…
High-resolution ALMA and HST images of q1 Eri: an asymmetric debris disc with an eccentric Jupiter
Krist, J.; Stapelfeldt, K.; Kral, Q. +10 more
We present Atacama Large Millimetre/sub-Millimetre Array (ALMA) 1.3 and 0.86 mm observations of the nearby (17.34 pc) F9V star q1 Eri (HD 10647, HR 506). This system, with age ~1.4 Gyr, hosts a ~2 au radial velocity planet and a debris disc with the highest fractional luminosity of the closest 300 FGK type stars. The ALMA images, with resolution ~…
Correction to the Photometric Colors of the Gaia Data Release 2 with the Stellar Color Regression Method
Niu, Zexi; Liu, Jifeng; Yuan, Haibo
The second Gaia data release (DR2) delivers accurate and homogeneous photometry data of the whole sky of an exquisite quality, reaching down to the unprecedented millimagnitude (mmag) level for the G, GRP, and GBP passbands. However, the presence of magnitude-dependent systematic effects at the 10 mmag level limits its power …
Tidal tails in the disintegrating open cluster NGC 752
Vaidya, Kaushar; Rao, Khushboo K.; Agarwal, Manan +1 more
We utilize the robust membership determination algorithm, ML-MOC, on the precise astrometric and deep photometric data from Gaia Early Data Release 3 within a region of radius 5° around the centre of the intermediate-age Galactic open cluster NGC 752 to identify its member stars. We report the discovery of the tidal tails of NGC 752, extending out…
Evidence of a Clear Atmosphere for WASP-62b: The Only Known Transiting Gas Giant in the JWST Continuous Viewing Zone
Nikolov, Nikolay; Mikal-Evans, Thomas; Sing, David K. +12 more
Exoplanets with cloud-free, haze-free atmospheres at the pressures probed by transmission spectroscopy represent a valuable opportunity for detailed atmospheric characterization and precise chemical abundance constraints. We present the first optical to infrared (0.3-5 µm) transmission spectrum of the hot Jupiter WASP-62b, measured with Hubb…