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#exoplanet

8 posts4 participants0 posts today
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AlcorNews

Un géant trouble se cache : BHB2007-1 b, entre planète et naine brune, sculpte son disque natal. arxiv.org/abs/2103.03881 #Space #Science #Astrophysics #Exoplanet #Espace
#BHB2007-1_b

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arXiv.orgNear-IR observations of the young star [BHB2007]-1: A sub-stellar companion opening the gap in the diskThe presence of planets or sub-stellar objects still embedded in their native protoplanetary disks is indirectly suggested by disk sub-structures like gaps, cavities, and spirals. However, these companions are rarely detected. We present VLT/NACO high-contrast images in $J$, $H$, $K_S$, and $L^{\prime}$ band of the young star [BHB2007]-1 probing the inclined disk in scattered light and revealing the probable presence of a companion. The point source is detected in the $L^{\prime}$ band in spatial correspondence with complementary VLA observations. This object is constrained to have a mass in the range of 37-47 M$_{Jup}$ and is located at 50 au from the central star, inside the 70 au-large disk cavity recently imaged by ALMA, that is absent from our NACO data (down to 20 au). This mass range is compatible with the upper end derived from the size of the ALMA cavity. The NIR disk brightness is highly asymmetric around the minor axis, with the southern side 5.5 times brighter than the northern side. The constant amount of asymmetry across all wavelengths suggests that it is due to a shadow cast by a misaligned inner disk. The massive companion that we detect could, in principle, explain the possible disk misalignment, as well as the different cavity sizes inferred by the NACO and ALMA observations. The confirmation and characterization of the companion is entrusted to future observations.
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Fabrizio Musacchio

🪐 First direct #imaging of a forming #exoplanet carving multiple rings in its accretion disk! Van Capelleveen et al. (2025) reveal a ~5 MJup #protoplanet 57 AU (~8.5 billion km, farther than Pluto) from its star (#WISPIT2, ~133 pc) with #VLT/SPHERE, showing #Keplerian motion and Hα #accretion. A rare, striking view of planet–disk interaction in real time 💫

🌍 doi.org/10.3847/2041-8213/adf7

Figure 1. Shown here is a SPHERE/IRDIS multiband image of the WISPIT 2 system. The H-band Qϕ image was added as the blue channel and the median combination of H-band and Ks-band Qϕ images was added as the green channel. The red channel is a combination of a Ks-band Qϕ image and a Ks-band cADI image in which we masked all but the gap containing the thermal emission from WISPIT 2b.
#PlanetFormation#Astrophysics#ALMA
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Steve Dustcircle 🌹

#JWST Finds An #Exoplanet Around A Pulsar Whose #Atmosphere Is All #Carbon

universetoday.com/articles/jws

Visualization that's part of an animation of a black widow pulsar burning its companion. Credit - NASA Goddard Spaceflight Center / Cruz deWilde
Universe TodayJWST Finds An Exoplanet Around A Pulsar Whose Atmosphere Is All CarbonScience advances through data that don’t fit our current understanding. At least that was Thomas Kuhn’s theory in his famous On the Structure of Scientific Revolutions. So scientists should welcome new data that challenges their understanding of how the universe works. A recent paper, available in pre-print on arXiv, using data from the James Webb Space Telescope (JWST) might just have found some data that can do that. It looked at an exoplanet around a millisecond pulsar and found its atmosphere is made up of almost entirely pure carbon.
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RTN

#UniBE:
"
Künstliche Intelligenz treibt die Entdeckung neuer Exoplaneten voran
"
".. KI-Modell entwickelt, das in der Lage ist, die Architektur von Planetensystemen vorherzusagen .."
" .. verwenden .. Transformer-Architektur, die die Grundlage der Large Language Models bildet, die Tools wie das kürzlich vorgestellte Schweizer Modell Apertus oder Chatbots wie ChatGPT antreiben.. .."

mediarelations.unibe.ch/medien

9.9.2025

Media RelationsKünstliche Intelligenz treibt die Entdeckung neuer Exoplaneten voranForschende der Universität Bern haben ein KI-Modell entwickelt, das in der Lage ist, die Architektur von Planetensystemen vorherzusagen und daraus auf das Vorhandensein von noch nicht entdeckten Planeten zu schliessen. Sie verwenden die sogenannte Transformer-Architektur, die die Grundlage der Large Language Models bildet, die Tools wie das kürzlich vorgestellte Schweizer Modell Apertus oder Chatbots wie ChatGPT antreiben.
#AI#Astronomie#Bern
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