Search Publications
The young mini-Neptune HD 207496b that is either a naked core or on the verge of becoming one
Deleuil, M.; Winn, J. N.; Adibekyan, V. +39 more
Aims: We report the discovery and characterisation of the transiting mini-Neptune HD 207496 b (TOI-1099) as part of a large programme that aims to characterise naked core planets.
Methods: We obtained HARPS spectroscopic observations, one ground-based transit, and high-resolution imaging which we combined with the TESS photometry to conf…
On the Physical Nature of the so-Called Prominence Tornadoes
Heinzel, Petr; Schmieder, Brigitte; Labrosse, Nicolas +7 more
The term `tornado' has been used in recent years to describe several solar phenomena, from large-scale eruptive prominences to small-scale photospheric vortices. It has also been applied to the generally stable quiescent prominences, sparking a renewed interest in what historically was called `prominence tornadoes'. This paper carries out an in-de…
The Evaporating Massive Embedded Stellar Cluster IRS 13 Close to Sgr A*. I. Detection of a Rich Population of Dusty Objects in the IRS 13 Cluster
Eckart, Andreas; Zajaček, Michal; Labadie, Lucas +6 more
A detailed analysis of the nuclear star cluster not only concedes the existence of the S cluster, with its fast-moving stars and the supermassive black hole Sgr A*. It also reveals an embedded region of gas and dust with an exceptionally high stellar density called IRS 13. The IRS 13 cluster can be divided into the northern and eastern counterpart…
MOSEL survey: extremely weak outflows in EoR analogues at z = 3-4
Kewley, Lisa J.; Harshan, Anishya; Kacprzak, Glenn G. +7 more
This paper presents deep K-band spectroscopic observations of galaxies at z = 3 - 4 with composite photometric rest-frame H Β+[O III] 5007 equivalent widths (EW0) > 600 Å, comparable to the EW of galaxies observed during the epoch of reionization (EoR, z > 6). The typical spectroscopic [O III] 5007 EW0 and stellar mass …
Three Warm Jupiters around Solar-analog Stars Detected with TESS
Trifonov, Trifon; Henning, Thomas; Triaud, Amaury H. M. J. +32 more
We report the discovery and characterization of three giant exoplanets orbiting solar-analog stars, detected by the TESS space mission and confirmed through ground-based photometry and radial velocity measurements taken at La Silla observatory with FEROS. TOI-2373 b is a warm Jupiter orbiting its host star every ~13.3 days, and is one of the most …
Hint of an exocomet transit in the CHEOPS light curve of HD 172555
Alonso, R.; Deleuil, M.; Erikson, A. +72 more
HD 172555 is a young (~20 Myr) A7V star surrounded by a 10 au wide debris disk suspected to be replenished partly by collisions between large planetesimals. Small evaporating transiting bodies, that is exocomets, have also been detected in this system by spectroscopy. After β Pictoris, this is another example of a system possibly witnessing a phas…
In-flight radiometric calibration of the Metis Visible Light channel using stars and comparison with STEREO-A/COR2 data
Heinzel, P.; Sasso, C.; Romoli, M. +45 more
Context. We present the results for the in-flight radiometric calibration performed for the Visible Light (VL) channel of the Metis coronagraph on board Solar Orbiter.
Aims: The radiometric calibration is a fundamental step in building the official pipeline of the instrument, devoted to producing the calibrated data in physical units (L2 data…
ALMA Measurement of 10 kpc Scale Lensing-power Spectra toward the Lensed Quasar MG J0414+0534
Matsushita, Satoki; Minezaki, Takeo; Nakanishi, Kouichiro +1 more
The lensing power spectra for gravitational potential, astrometric shift, and convergence perturbations are powerful probes to investigate dark matter structures on small scales. We report the first lower and upper bounds of these lensing power spectra on angular scale ~1″ toward the anomalous quadruply lensed quasar MG J0414+0534 at a redshift z …
LISC Catalog of Star Clusters. II. High Galactic Latitude Open Clusters in Gaia EDR3
Li, Zhongmu; Mao, Caiyan
It is well known that there are few open clusters (OCs) in the high-latitude region of the Milky Way galaxy, because most star formation takes place in the thin disk. It is therefore crucial to look for high Galactic latitude OCs, in order to understand OCs and the Galactic parts outside the plane well. This work looks for high Galactic latitude O…
Observing the onset of the accretion wake in Vela X-1
Santangelo, A.; Grinberg, V.; Kretschmar, P. +7 more
High-mass X-ray binaries (HMXBs) offer a unique opportunity to investigate accretion onto compact objects and the wind structure in massive stars. A key source for such studies is the bright neutron star HMXB Vela X-1 whose convenient physical and orbital parameters facilitate analyses and in particular enable studies of the wind structure in HMXB…