Search Publications
Gaia Data Release 3. Ellipsoidal variables with possible black hole or neutron star secondaries
Mazeh, T.; Audard, M.; Rimoldini, L. +10 more
As part of Gaia Data Release 3, a large number of ellipsoidal variables were identified with supervised classification. The periodic variability of these ellipsoidals is presumably induced by tidal interaction with a companion in a close binary system. We present 6306 short-period probable ellipsoidal variables with relatively large-amplitude Gaia…
The Fifth Catalogue of Nearby Stars (CNS5)
Reffert, Sabine; Golovin, Alex; Vani, Akash +3 more
Context. We present the compilation of the Fifth Catalogue of Nearby Stars (CNS5), based on astrometric and photometric data from Gaia EDR3 and HIPPARCOS and supplemented with parallaxes from ground-based astrometric surveys carried out in the infrared.
Aims: The aim of the CNS5 is to provide the most complete sample of objects in the solar n…
HYPerluminous quasars at the Epoch of ReionizatION (HYPERION): A new regime for the X-ray nuclear properties of the first quasars
Maiolino, R.; Fiore, F.; Done, C. +40 more
The existence of luminous quasars (QSOs) at the epoch of reionization (EoR; i.e., z > 6) powered by well-grown supermassive black holes (SMBHs) with masses ≳109 M⊙ challenges models of early SMBH formation and growth. To shed light on the nature of these sources, we started a multiwavelength program based on a sample of 18…
Gaia Data Release 3. Microlensing events from all over the sky
Audard, M.; Rimoldini, L.; Holl, B. +12 more
Context. One of the rarest types of variability is the phenomenon of gravitational microlensing, a transient brightening of a background star due to an intervening lensing object. Microlensing is a powerful tool for studying the invisible or otherwise undetectable populations in the Milky Way, including planets and black holes.
Aims: We descr…
Properties of flare events based on light curves from the TESS survey
Zhang, Liyun; Han, Xianming L.; Misra, Prabhakar +4 more
Aims: A stellar flare is a strong energy burst event. Understanding stellar flares is important for determining the properties of stellar magnetic activities. We aim to perform detailed statistical analyses on stellar flare characteristics in terms of the different stellar parameters using the light curves of the Transiting Exoplanet Survey S…
Reflections on nebulae around young stars. A systematic search for late-stage infall of material onto Class II disks
Ginski, C.; Testi, L.; Williams, J. P. +10 more
Context. While it is generally assumed that Class II sources evolve largely in isolation from their environment, many still lie close to molecular clouds and may continue to interact with them. This may result in late accretion of material onto the disk that can significantly influence disk processes and planet formation.
Aims: In order to sy…
Morphology-density relation, quenching, and mergers in CARLA clusters and protoclusters at 1.4 < z < 2.8
Noirot, Gaël; Gonzalez, Anthony H.; Stern, Daniel +11 more
At redshifts of z ≲ 1.3, early-type galaxies (ETGs) and passive galaxies are mainly found in dense environments, such as galaxy clusters. However, it remains unclear whether these well-known morphology-density and passive-density relations have already been established at higher redshifts. To address this question, we performed an in-depth study o…
Gaia Data Release 3. GRVS photometry from the RVS spectra
Smith, M.; Caffau, E.; Jordi, C. +38 more
Context.Gaia Data Release 3 (DR3) contains the first release of magnitudes estimated from the integration of Radial Velocity Spectrometer (RVS) spectra for a sample of about 32.2 million stars brighter than GRVS ∼ 14 mag (or G ∼ 15 mag).
Aims: In this paper, we describe the data used and the approach adopted to derive and validate …
JWST Observations of Young protoStars (JOYS). Outflows and accretion in the high-mass star-forming region IRAS 23385+6053
Henning, T.; Östlin, G.; Güdel, M. +21 more
Context. Understanding the earliest stages of star formation, and setting it in the context of the general cycle of matter in the interstellar medium, is a central aspect of research with the James Webb Space Telescope (JWST).
Aims: The JWST program JOYS (JWST Observations of Young protoStars) aims to characterize the physical and chemical pr…
Evolved massive stars at low-metallicity. V. Mass-loss rate of red supergiant stars in the Small Magellanic Cloud
Tian, Hao; Yang, Ming; Bonanos, Alceste Z. +17 more
The mass-loss rate (MLR) is one of the most important parameters in astrophysics, because it impacts many areas of astronomy, such as ionizing radiation, wind feedback, star-formation rates, initial mass functions, stellar remnants, supernovae, and so on. However, the most important modes of mass loss are also the most uncertain, as the dominant p…