Search Publications
Astronomical CH3+ rovibrational assignments. A combined theoretical and experimental study validating observational findings in the d203-506 UV-irradiated protoplanetary disk
Martin-Drumel, Marie-Aline; Van De Putte, Dries; Habart, Emilie +25 more
Context. The methyl cation (CH3+) has recently been discovered in the interstellar medium through the detection of 7 µm (1400 cm−1) features toward the d203-506 protoplanetary disk by the JWST. Line-by-line spectroscopic assignments of these features, however, were unsuccessful due to complex intramolecular p…
Taking a break: Paused accretion in the symbiotic binary RT Cru
Nuñez, N. E.; Mukai, K.; Sokoloski, J. L. +10 more
Symbiotic binaries sometimes hide their symbiotic nature for significant periods of time. There is mounting observational evidence that, in symbiotics that are powered solely by the accretion of the red giant's wind material onto a white dwarf, without any quasi-steady shell burning on the surface of the white dwarf, the characteristic emission li…
Persistent and occasional: Searching for the variable population of the ZTF/4MOST sky using ZTF Data Release 11
Bayo, A.; Bauer, F. E.; Arévalo, P. +13 more
Aims: We present a variability-, color-, and morphology-based classifier designed to identify multiple classes of transients and persistently variable and non-variable sources from the Zwicky Transient Facility (ZTF) Data Release 11 (DR11) light curves of extended and point sources. The main motivation to develop this model was to identify ac…
The dusty circumstellar environment of Betelgeuse during the Great Dimming as seen by VLTI/MATISSE
Danchi, W.; Matter, A.; Lopez, B. +23 more
Context. The `Great Dimming' of the prototypical red supergiant Betelgeuse, which occurred between December 2019 and April 2020, gives us unprecedented insight into the processes occurring on the stellar surface and in the inner wind of this type of star. In particular it may bring further understanding of their dust nucleation and mass-loss proce…
Gaia-IGRINS synergy: Orbits of newly identified Milky Way star clusters
Beers, Timothy C.; Placco, Vinicius M.; Minniti, Dante +11 more
Context. The recent and exquisite astrometric, photometric, and radial velocity measurements of the Gaia mission resulted in a substantial advancement of the determination of the orbits for old star clusters, including the oldest Milky Way globular clusters (MW GCs).
Aims: The main goal of the present paper is to use the new Gaia data release…
The VLT/SPHERE view of the ATOMIUM cool evolved star sample. I. Overview: Sample characterization through polarization analysis
Waters, L. B. F. M.; Menten, K. M.; Sahai, R. +32 more
Context. Low- and intermediate-mass asymptotic giant stars and massive red supergiant stars are important contributors to the chemical enrichment of the Universe. They are among the most efficient dust factories of the Galaxy, harboring chemically rich circumstellar environments. Yet, the processes that lead to dust formation or the large-scale sh…
Chemistry of multiple stellar populations in the mono-metallic, in situ, bulge globular cluster NGC 6388
Bragaglia, Angela; Carretta, Eugenio
We present the homogeneous abundance analysis for a combined sample of 185 giants in the bulge globular cluster (GC) NGC 6388. Our results are used to describe the multiple stellar populations and differences or analogies with bulge field stars. Proton-capture elements indicate that a single class of first-generation polluters is sufficient to rep…
A low-metallicity massive contact binary undergoing slow Case A mass transfer: A detailed spectroscopic and orbital analysis of SSN 7 in NGC 346 in the SMC
Pauli, D.; Rickard, M. J.
Context. Most massive stars are believed to be born in close binary systems where they can exchange mass, which impacts the evolution of both binary components. Their evolution is of great interest in the search for the progenitors of gravitational waves. However, there are unknowns in the physics of mass transfer as observational examples are rar…
A large topographic feature on the surface of the trans-Neptunian object (307261) 2002 MS4 measured from stellar occultations
Barnes, J. W.; Burwitz, V.; Hueso, R. +201 more
Context. The physical characterization of trans-Neptunian objects is essential for improving our understanding of the formation and evolution of our Solar System. Stellar occultation is a ground-based technique that can be successfully used to determine some of the TNOs' fundamental physical properties with high precision, such as size and shape. …
Star formation in IC1396: Kinematics and subcluster structure revealed by Gaia
Fang, Min; García-Álvarez, David; Kim, Jinyoung Serena +3 more
Aims: We investigate the star formation history of the IC1396 region by studying its kinematics and completing the population census.
Methods: We used multiwavelength data, combining optical spectroscopy to identify and classify new members and near-infrared photometry to trace shocks, jets, and outflows as well as the interactions betwe…