Search Publications
Activity of TRAPPIST-1 analog stars observed with TESS
Pál, András; Moór, Attila; Vida, Krisztián +2 more
As more exoplanets are being discovered around ultracool dwarfs, understanding their magnetic activity and the implications for habitability is of prime importance. To find stellar flares and photometric signatures related to starspots, continuous monitoring is necessary, which can be achieved with spaceborne observatories such as the Transiting E…
WISDOM project - VIII. Multiscale feedback cycles in the brightest cluster galaxy NGC 0708
Williams, Thomas G.; Sarzi, Marc; Cappellari, Michele +8 more
We present high-resolution (synthesized beam size 0${_{.}^{\prime\prime}}$088 × 0${_{.}^{\prime\prime}}$083 or 25 × 23 pc2) Atacama Large Millimetre/submillimetre Array 12CO(2-1) line and 236 GHz continuum observations, as well as 5 GHz enhanced Multi-Element Radio Linked Interferometer Network (e-MERLIN) continuum observatio…
In search of radio emission from exoplanets: GMRT observations of the binary system HD 41004
Henning, Thomas; Mathew, Blesson; Manoj, P. +6 more
This paper reports Giant Metrewave Radio Telescope (GMRT) observations of the binary system HD 41004 that are among the deepest images ever obtained at 150 and 400 MHz in the search for radio emission from exoplanets. The HD 41004 binary system consists of a K1 V primary star and an M2 V secondary; both stars are host to a massive planet or brown …
The Flare and Warp of the Young Stellar Disk Traced with LAMOST DR5 OB-type Stars
Tian, Hao; Liu, Chao; Zhang, Bo +9 more
We present an analysis of the spatial density structure for the outer disk from 8-14 kpc with the LAMOST DR5 13,534 OB-type stars and observe similar flaring on the north and south sides of the disk, implying that the flaring structure is symmetrical about the Galactic plane, for which the scale height at different Galactocentric distances is from…
Constraining Saturn's Interior with Ring Seismology: Effects of Differential Rotation and Stable Stratification
Fuller, Jim; Lai, Dong; Dewberry, Janosz W. +2 more
Normal mode oscillations in Saturn excite density and bending waves in the C ring, providing a valuable window into the planet's interior. Saturn's fundamental modes (f-modes) excite the majority of the observed waves, while gravito-inertial modes (rotationally modified g-modes) associated with stable stratification in the deep interior provide a …
The outburst of a 60 min AM CVn reveals peculiar colour evolution: implications for outbursts in long-period double white dwarfs
Maccarone, T. J.; Cavecchi, Y.; Rivera Sandoval, L. E. +2 more
We report on multiwavelength observations during quiescence and of the first detected outburst of the ≈60 min orbital period AM CVn SDSS J113732+405458. Using X-ray and UV observations, we determined an upper limit duration of the event of about 1 yr. The amplitude of the outburst was remarkably small, of around 1 mag in r and 0.5 mag in g. We hav…
Potential vorticity structure of Titan's polar vortices from Cassini CIRS observations
Nixon, Conor A.; Irwin, Patrick G. J.; Teanby, Nicholas A. +4 more
The Cassini mission has provided the best opportunity to date to extensively study the seasonal variation in Titan's atmosphere, with observations spanning almost half a Titan year (Ls = 293 - 93 °). An important feature in the Titan middle-atmosphere is the formation of a polar vortex. Observations have shown that an initially well-dev…
The outer disc in shambles: Blind detection of Monoceros and the ACS with Gaia's astrometric sample
Anders, F.; Antoja, T.; Ramos, P. +5 more
Context. The Gaia astrometric sample allows us to study the outermost Galactic disc, the halo, and their interface. It is precisely at the very edge of the disc where the effects of external perturbations are expected to be the most noticeable.
Aims: Our goal is to detect the kinematic substructure present in the halo and at the edge of the M…
Identification of Sagittarius stream members in angular momentum space with gaussian mixture techniques
Peñarrubia, Jorge; Petersen, Michael S.
This paper uses Gaussian mixture techniques to dissect the Milky Way (MW) stellar halo in angular momentum space. Application to a catalogue of 5389 stars near the plane of the Sagittarius (Sgr) stream with full 6D phase-space coordinates supplied by Gaia EDR3 and SEGUE returns four independent dynamical components. The broadest and most populated…
Confirmation of two new Galactic bulge globular clusters: FSR 19 and FSR 25
Minniti, D.; Alonso-García, J.; Gómez, M. +1 more
Context. Globular clusters (GCs) in the Milky Way (MW) bulge are very difficult to study for the following reasons: (i) they suffer from the severe crowding and Galactic extinction, which are characteristic of these inner Galactic regions; (ii) they are more prone to the effects of dynamical processes. Therefore, they are relatively faint and diff…