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X-WR-CALDESC:Eventos para Instituto de Astrofísica de Andalucía
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SUMMARY:Academic Spanish Course for Foreigners (2025)
DESCRIPTION:The Academic Spanish course for foreigners is designed to facilitate effective communication in academic and profesional contexts. Through a practical and personalized focus\, the participants will develop essential linguistic abilities to discuss scientific articles\, participate in conferences\, give presentations\, and collaborate in international projects. The program includes technical vocabulary\, beginner and advanced grammar\, and simulations of real-life situations. Moreover\, it will promote the cultural immersion to strengthen the comprehension of the Hispanic world\, and their impact on interdisciplinary investigation and collaboration. \nThis course will be taught throughout in the following blocks: \nJanuary 21st – February 27thApril 22nd – May 29thSeptember 23rd – October 30thThe course is taught by Prof. Nazira Ruíz
URL:https://www.iaa.csic.es/evento/academic-spanish-course-for-foreigners-2025/
LOCATION:IAA – CSIC\, Glorieta de la Astronomía\, Granada\, España
CATEGORIES:SO Training
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DTSTART;TZID=Europe/Paris:20251003T123000
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CREATED:20250912T084237Z
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UID:27166-1759494600-1759498200@www.iaa.csic.es
SUMMARY:Reducing the Uncertainty on the Hubble Constant up to 35% with an Improved Statistical Analysis
DESCRIPTION:Reducing the Uncertainty on the Hubble Constant up to 35% with an Improved Statistical Analysis: Different Best-fit Likelihoods for Type Ia Supernovae\, Baryon Acoustic Oscillations\, Quasars\, and Gamma-Ray Bursts \nCosmological models and their parameters are widely debated\, especially about whether the current discrepancy between the values of the Hubble constant\, H 0\, obtained by Type Ia supernovae (SNe Ia) and the Planck data from the cosmic microwave background radiation could be alleviated when alternative cosmological models are considered. Thus\, combining high-redshift probes\, such as gamma-ray bursts (GRBs) and quasi-stellar objects (QSOs\, or quasars)\, together with baryon acoustic oscillations and SNe Ia is important to assess the viability of these alternative models and whether they can cast further light on the Hubble tension. \nIn this work\, for GRBs\, we use a three-dimensional relation between the peak prompt luminosity\, the rest-frame time at the end of the X-ray plateau\, and its corresponding luminosity in X-rays: the 3D Dainotti fundamental plane relation. Regarding QSOs\, we use the Risaliti-Lusso relation among the UV and X-ray luminosities for a sample of 2421 sources. We correct both the QSO and GRB relations by accounting for selection and evolutionary effects with a reliable statistical method. We here use both the traditional Gaussian likelihoods ( LG ) and the new best-fit likelihoods ( LN ) to infer cosmological parameters of nonflat Lambda cold dark matter (LambdaCDM) and flat wCDM models. We obtain for all the parameters reduced uncertainties\, up to 35% for H0\, when applying the new LN likelihoods in place of the Gaussian ones. \nOur results remain consistent with a flat LambdaCDM model\, although with a shift of the dark energy parameter w toward w < -1 and a curvature density parameter toward Omega k < 0. \nFecha y lugar: 03/10/2025 – 12:30 | Salón de ActosMaria Giovanna DainottiNational Astronomical Observatory of Japan (NAOJ) \n  \n 
URL:https://www.iaa.csic.es/evento/reducing-the-uncertainty-on-the-hubble-constant-up-to-35-with-an-improved-statistical-analysis/
LOCATION:IAA – CSIC\, Glorieta de la Astronomía\, Granada\, España
CATEGORIES:Seminarios
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