Search Publications
Recovering the gas properties of protoplanetary disks through parametric visibility modeling: MHO 6
Pinilla, P.; Kurtovic, N. T.
Context. The composition and distribution of the gas in a protoplanetary disk plays a key role in shaping the outcome of the planet formation process. Observationally, the recovery of information such as the emission height and brightness temperature from interfer-ometric data is often limited by the imaging processes.
Aims: To overcome the l…
The remarkable microquasar S26: A super-Eddington PeVatron
Romero, Gustavo E.; Abaroa, Leandro; Mancuso, Giulio C. +1 more
Context. S26 is an extragalactic microquasar with the most powerful jets ever discovered. They have a kinetic luminosity of Lj ∼ 5 × 1040 erg s‑1. This implies that the accretion power to the black hole should be super-Eddington, of the order of Lacc ∼ Lj. However, the observed X-ray flux of t…
The "C": The large Chameleon-Musca-Coalsack cloud
Alves, João; Zucker, Catherine; Edenhofer, Gordian +2 more
Recent advancements in 3D dust mapping have transformed our understanding of the Milky Way's local interstellar medium, enabling us to explore its structure in three spatial dimensions for the first time. In this Letter, we use the most recent 3D dust map by Edenhofer et al. to study the well-known Chameleon, Musca, and Coalsack cloud complexes, l…
Host galaxy of low-luminosity compact sources
Ciroi, S.; Berton, M.; Sani, E. +6 more
The term 'active galactic nuclei' (AGN) is applied to a huge variety of objects, classified on the basis of their properties at different wavelengths. Peaked sources (PSs) represent a class of AGN at the first stage of evolution, characterised by a peaked radio spectrum. Among these radio sources, low-luminosity compact (LLC) sources can be identi…
The PSF smoothing effect on concentration-related parameters of high-redshift galaxies in HST and JWST
Ho, Luis C.; Zhuang, Ming-Yang; Li, Zhao-Yu +2 more
Aims: We performed a comprehensive investigation of the PSF smoothing effect on the measurement of concentration-related parameters (C, Gini, and M20) of high-redshift galaxies in the HST and JWST surveys.
Methods: Our sample contains massive galaxies (109.5 M⊙ ≤ M* ≤ 1011.5 M⊙<…
Cluster membership analysis with supervised learning and N-body simulations
Berczik, P.; Pang, X.; Bissekenov, A. +3 more
Context. Membership analysis is an important tool for studying star clusters. There are various approaches to membership determination, including supervised and unsupervised machine-learning (ML) methods. Aims. We perform membership analysis using the supervised ML approach. Methods. We trained and tested our ML models on two sets of star cluster …
TOI-1199 b and TOI-1273 b: Two new transiting hot Saturns detected and characterized with SOPHIE and TESS
Deleuil, M.; Moutou, C.; Narita, N. +41 more
We report the characterization of two planet candidates detected by the Transiting Exoplanet Survey Satellite (TESS), TOI-1199 b and TOI-1273 b, with periods of 3.7 and 4.6 days, respectively. Follow-up observations for both targets, which include several ground-based light curves, confirmed the transit events. High-precision radial velocities fro…
Characterizing B stars from Kepler/K2 Campaign 11. Optical analysis and seismic diagnostics
Eidam, Jéssica M.; Andrade, Laerte; Emilio, Marcelo +5 more
Aims: In this study, we analyze 122 B-type star candidates observed during Campaign 11 of the Kepler/K2 mission to investigate their variability and pulsation characteristics. A subset of 45 B star candidates was observed during the Kepler/K2 mission's Campaign 11 between September and December 2016. Our analyses aim to gain a deeper understa…
Discovery of an extended horizontal branch in the Large Magellanic Cloud globular cluster NGC 1835
Vesperini, Enrico; Cadelano, Mario; Pallanca, Cristina +6 more
We present a high-angular-resolution multi-wavelength study of the massive globular cluster NGC 1835 in the Large Magellanic Cloud. Thanks to a combination of optical and near-ultraviolet images acquired with the WFC3 on board the HST, we performed a detailed inspection of the stellar population in this stellar system, adopting a `UV-guided search…
What drives the wheels of evolution in NGC 1512?. A UVIT study
Mathew, Blesson; Kartha, Sreeja S.; George, Koshy +4 more
Context. Environmental and secular processes play a pivotal role in the evolution of galaxies. These can be external processes such as interactions or internal processes linked to the action of bar, bulge, and spiral structures. Ongoing star formation in spiral galaxies can be affected by these processes. By studying the star formation progression…