Search Publications
Evolution of BD-14 3065b (TOI-4987b) from giant planet to brown dwarf as possible evidence of deuterium burning at old stellar ages
Latham, David W.; Quinn, Samuel N.; Berlind, Perry +20 more
The present study confirms BD-14 3065b as a transiting planet-brown dwarf in a triple-star system, with a mass near the deuterium-burning boundary. BD-14 3065b has the largest radius observed within the sample of giant planets and brown dwarfs around post-main sequence stars. Its orbital period is 4.3 days and it transits a subgiant F-type star wi…
Revealing the inner workings of the lensed quasar SDSS J1339+1310: Insights from microlensing analysis
Kaspi, S.; Muñoz, J. A.; Mediavilla, E. +4 more
Aims. We aim to unveil the structure of the continuum and broad-emission line (BEL) emitting regions in the gravitationally lensed quasar SDSS J1339+1310 by examining the distinct signatures of microlensing present in this system. Our study involves a comprehensive analysis of ten years (2009–2019) of photometric monitoring data and seven spectros…
Abundance of strontium in the Galactic globular cluster 47 Tuc
Kučinskas, A.; Kolomiecas, E.; Dobrovolskas, V. +1 more
Aims: We have determined Sr abundance in a sample of 31 red giant branch stars located in the Galactic globular cluster 47 Tuc with the aim to identify potential differences in the Sr abundance between first population (1P, Na-poor) and second population (2P, Na-rich) stars.
Methods: We derived the Na and Sr abundances from the archival …
The accreted galaxy: An overview of TESS metal-poor accreted star candidates
Hawkins, Keith; Jofré, Paula; de Brito Silva, Danielle +2 more
The Milky Way is a mosaic of stars from different origins. In particular, metal-poor accreted star candidates offer a unique opportunity to better understand the accretion history of the Milky Way. In this work, we aim to explore the assembly history of the Milky Way by investigating accreted stars in terms of their ages, dynamical properties, and…
Revisiting the massive star-forming complex RCW 122: New millimeter and submillimeter study
Baume, G.; Gamen, R.; Merello, M. +9 more
In this paper, we present a new multifrequency study of the giant star-forming complex RCW 122. We used molecular data obtained with the ASTE 10 m and the APEX 12 m telescopes, along with infrared observations spanning from 3.6 µm to 870 µm, obtained from available databases. We also incorporated a range of public datasets, including the radio con…
Different manifestations of a loop-like transient brightening in solar atmospheres
Wang, Jincheng; Cai, Qiangwei; Feng, Hengqiang +1 more
Context. Small-scale transient brightenings that are the consequence of magnetic reconnection play pivotal roles in the heating process of solar atmospheres. These phenomena contain key information about the dynamic evolution of the solar magnetic field. The fine-scale structures triggered by instabilities in these brightenings are intimately conn…
Faint mm NIKA2 dusty star-forming galaxies: Finding the high-redshift population
Berta, S.; Aussel, H.; Adam, R. +46 more
Aims: High-redshift dusty star-forming galaxies (DSFGs) are proposed to be the progenitors of massive quiescent galaxies arising at cosmic noon, providing a crucial insight into the formation, assembly, and early quenching of massive galaxies in the early Universe. However, their high redshift combined with high dust obscuration adds signific…
Stellar chromospheric activity database of solar-like stars based on the LAMOST Low-Resolution Spectroscopic Survey. II. The bolometric and photospheric calibration
Zhang, Jun; Zhang, Haotong; Luo, Ali +2 more
Context. The dependence of stellar magnetic activity on stellar parameters is inspired by the chromospheric activity studies based on the large-scale spectroscopic surveys.
Aims: The main objective of this project is to provide the chromospheric activity parameter database for the LAMOST Low-Resolution Spectroscopic Survey (LRS) spectra of so…
The overflowing atmosphere of WASP-121 b: High-resolution He I λ10833 transmission spectroscopy with VLT/CRIRES+
Czesla, S.; Nortmann, L.; Reiners, A. +14 more
Transmission spectroscopy is a prime method to study the atmospheres of extrasolar planets. We obtained a high-resolution spectral transit time series of the hot Jupiter WASP-121 b with CRIRES+ to study its atmosphere via transmission spectroscopy of the He I λ10833 triplet lines. Our analysis shows a prominent He I λ10833 absorption feature movin…
Apparent non-variable stars from the Kepler mission
Schmidt, K.; Paunzen, E.; Maitzen, H. M. +12 more
Context. The analysis of non-variable stars is generally neglected in the literature. However, such objects are needed for many calibration processes and for testing pulsational models. The photometric time series of the Kepler satellite mission still stand as the most accurate data available today and are excellently suited to the search for non-…