Search Publications
Precise dynamical masses of new directly imaged companions from combining relative astrometry, radial velocities, and HIPPARCOS-Gaia eDR3 accelerations
Zhang, H.; Ségransan, D.; Udry, S. +7 more
Aims: With an observing time span of more than 20 yr, the CORALIE radial-velocity survey is able to detect long-term trends in data corresponding to companions with masses and separations accessible to direct imaging. Combining exoplanet detection techniques, such as radial velocities from the CORALIE survey, astrometric accelerations from HI…
The TESS Grand Unified Hot Jupiter Survey. I. Ten TESS Planets
Henning, Thomas; Butler, R. Paul; Bieryla, Allyson +69 more
Hot Jupiters-short-period giant planets-were the first extrasolar planets to be discovered, but many questions about their origin remain. NASA's Transiting Exoplanet Survey Satellite (TESS), an all-sky search for transiting planets, presents an opportunity to address these questions by constructing a uniform sample of hot Jupiters for demographic …
Scaling relations for globular cluster systems in early-type galaxies - II. Is there an environmental dependence?
Bassino, Lilia P.; Caso, Juan P.; Ennis, Ana I. +1 more
The current properties of globular cluster systems (GCSs) are the result of the evolution experienced by their host galaxies, which shape the richness of the GCS as well as its spatial distribution, among other features. We carry out an analysis of the projected radial distribution of globular clusters for a sample of almost 30 early-type galaxies…
Transit least-squares survey. IV. Earth-like transiting planets expected from the PLATO mission
Heller, René; Samadi, Réza; Harre, Jan-Vincent
In its long-duration observation phase, the PLATO satellite (scheduled for launch in 2026) will observe two independent, non-overlapping fields, nominally one in the northern hemisphere and one in the southern hemisphere, for a total of four years. The exact duration of each pointing will be determined two years before launch. Previous estimates o…
The molecular gas properties in local Seyfert 2 galaxies
Andreani, P.; Pozzi, F.; Hatziminaoglou, E. +8 more
Aims: We present a multiwavelength study of the molecular gas properties of a sample of local Seyfert 2 galaxies to assess if, and to what extent, the presence of an active galactic nucleus (AGN) can affect the interstellar medium (ISM) properties in a sample of 33 local Seyfert 2 galaxies.
Methods: We compare the molecular gas content (…
Disk Evolution Study through Imaging of Nearby Young Stars (DESTINYS): A Panchromatic View of DO Tau's Complex Kilo-astronomical-unit Environment
Ménard, François; Bae, Jaehan; Bergin, Edwin A. +20 more
While protoplanetary disks are often treated as isolated systems in planet formation models, observations increasingly suggest that vigorous interactions between Class II disks and their environments are not rare. DO Tau is a T Tauri star that has previously been hypothesized to have undergone a close encounter with the HV Tau system. As part of t…
White dwarfs identified in LAMOST Data Release 5
Liu, Jifeng; Bai, Yu; Zhang, Huawei +5 more
In this paper, we report white dwarfs (WD) identified in the 5th Data Release of the Large Area Multi-Object fibre Spectroscopic Telescope (LAMOST), including spectral types of DA, DB, DC, DZ, and so on. There are 2625 DA spectra of 2281 DA stars, 182 DB spectra of 166 DB stars, 62 DC spectra of 58 DC stars, 36 DZ spectra of 33 DZ stars…
Rapidly oscillating TESS A-F main-sequence stars: are the roAp stars a distinct class?
Balona, L. A.
From sector 1-44 TESS observations, 19 new rapidly oscillating Ap (roAp) stars, 103 ostensibly non-peculiar stars with roAp-like frequencies, and 617 δ Scuti stars with independent frequencies typical of roAp stars were found. Examination of all chemically peculiar stars observed by TESS resulted in the discovery of 199 Ap stars that pulsate as δ …
The SOFIA FEEDBACK Legacy Survey Dynamics and Mass Ejection in the Bipolar H II Region RCW 36
Schneider, N.; Zavagno, A.; Stutzki, J. +20 more
We present [C II] 158 µm and [O I] 63 µm observations of the bipolar H II region RCW 36 in the Vela C molecular cloud, obtained within the SOFIA legacy project FEEDBACK, which is complemented with APEX 12/13CO (3-2) and Chandra X-ray (0.5-7 keV) data. This shows that the molecular ring, forming the waist of the bipolar nebul…
Substructures, resonances, and debris streams. A new constraint on the inner shape of the Galactic dark halo
Helmi, Amina; Koppelman, Helmer H.; Dodd, Emma
Context. The local stellar halo of the Milky Way contains the debris from several past accretion events.
Aims: Here we study in detail the structure and properties of nearby debris associated with the Helmi streams, which was originally identified as an overdensity in integrals of motion space.
Methods: We use 6D phase-space information …