Search Publications
Six new supermassive black hole mass determinations from adaptive-optics assisted SINFONI observations
Krajnović, Davor; Sarzi, Marc; Cappellari, Michele +4 more
Different massive black hole mass - host galaxy scaling relations suggest that the growth of massive black holes is entangled with the evolution of their host galaxies. The number of measured black hole masses is still limited and additional measurements are necessary to understand the underlying physics of this apparent coevolution. We add six ne…
Probing the origin of stellar flares on M dwarfs using TESS data sectors 1-3
Doyle, J. G.; Ramsay, G.; Wu, K. +1 more
Detailed studies of the Sun have shown that sunspots and solar flares are closely correlated. Photometric data from Kepler/K2 has allowed similar studies to be carried out on other stars. Here, we utilize Transiting Exoplanet Survey Satellite (TESS) photometric 2-min cadence of 167 low-mass stars from Sectors 1 to 3 to investigate the relationship…
Overcast on Osiris: 3D radiative-hydrodynamical simulations of a cloudy hot Jupiter using the parametrized, phase-equilibrium cloud formation code EDDYSED
Sing, D. K.; Mikal-Evans, T.; Mayne, N. J. +5 more
We present results from 3D radiative-hydrodynamical simulations of HD 209458b with a fully coupled treatment of clouds using the EDDYSED code, critically, including cloud radiative feedback via absorption and scattering. We demonstrate that the thermal and optical structure of the simulated atmosphere is markedly different, for the majority of our…
Interstellar Medium and Star Formation of Starburst Galaxies on the Merger Sequence
Ho, Luis C.; Li, Zhihui; Zhuang, Ming-Yang +3 more
The interstellar medium is a key ingredient that governs star formation in galaxies. We present a detailed study of the infrared (∼1-500 µm) spectral energy distributions of a large sample of 193 nearby (z≲ 0.088) luminous infrared galaxies (LIRGs) covering a wide range of evolutionary stages along the merger sequence. The entire sample has …
Systematic errors in Gaia DR2 astrometry and their impact on measurements of internal kinematics of star clusters
Vasiliev, Eugene
We use stellar proper motions (PM) from Gaia Data Release 2 for studying the internal kinematics of Milky Way globular clusters. In addition to statistical measurement errors, there are significant spatially correlated systematic errors, which cannot be ignored when studying the internal kinematics. We develop a mathematically consistent procedure…
The Far-infrared Polarization Spectrum of ρ Ophiuchi A from HAWC+/SOFIA Observations
Morris, Mark R.; Staguhn, Johannes; Ward-Thompson, Derek +23 more
We report on polarimetric maps made with HAWC+/SOFIA toward ρ Oph A, the densest portion of the ρ Ophiuchi molecular complex. We employed HAWC+ bands C (89 µm) and D (154 µm). The slope of the polarization spectrum was investigated by defining the quantity {{ \mathcal R }}{DC}={p}D/{p}C, where p C…
LISA Pathfinder platform stability and drag-free performance
Mendes, L.; Russano, G.; Lloro, I. +76 more
The science operations of the LISA Pathfinder mission have demonstrated the feasibility of sub-femto-g free fall of macroscopic test masses necessary to build a gravitational wave observatory in space such as LISA. While the main focus of interest, i.e., the optical axis or the x -axis, has been extensively studied, it is also of great importance …
Exoplanet characterisation in the longest known resonant chain: the K2-138 system seen by HARPS
Bouchy, F.; Deleuil, M.; Kirk, J. +36 more
The detection of low-mass transiting exoplanets in multiple systems brings new constraints to planetary formation and evolution processes and challenges the current planet formation theories. Nevertheless, only a mere fraction of the small planets detected by Kepler and K2 have precise mass measurements, which are mandatory to constrain their comp…
Feedback from OB stars on their parent cloud: gas exhaustion rather than gas ejection
Peretto, N.; Marsh, K.; Fuller, G. A. +1 more
Context. Stellar feedback from high-mass stars shapes the interstellar medium, and thereby impacts gas that will form future generations of stars. However, due to our inability to track the time evolution of individual molecular clouds, quantifying the exact role of stellar feedback on their star formation history is an observationally challenging…
On the Ubiquity and Stellar Luminosity Dependence of Exocometary CO Gas: Detection around M Dwarf TWA 7
Bayo, A.; Wilner, D. J.; Olofsson, J. +2 more
Millimeter observations of CO gas in planetesimal belts show a high detection rate around A stars, but few detections for later type stars. We present the first CO detection in a planetesimal belt around an M star, TWA 7. The optically thin CO (J = 3-2) emission is colocated with previously identified dust emission from the belt, and the emission …