The impact of UV variability on the abundance of bright galaxies at $z geq 9$

Posted by klaurent MIT

Kavli Affiliate: Mark Vogelsberger | First 5 Authors: Xuejian Shen, Mark Vogelsberger, Michael Boylan-Kolchin, Sandro Tacchella, Rahul Kannan | Summary: JWST observations have revealed a population of galaxies bright enough that potentially challenge standard galaxy formation models in the $Lambda$CDM cosmology. Using a minimal empirical framework, we investigate the influence of variability on the rest-frame […]


Continue.. The impact of UV variability on the abundance of bright galaxies at $z geq 9$

Measurement of ultra-high-energy diffuse gamma-ray emission of the Galactic plane from 10 TeV to 1 PeV with LHAASO-KM2A

Posted by dbos Peking

Kavli Affiliate: Li Xin Li | First 5 Authors: , , , , | Summary: The diffuse Galactic $gamma$-ray emission, mainly produced via interactions between cosmic rays and the interstellar medium and/or radiation field, is a very important probe of the distribution, propagation, and interaction of cosmic rays in the Milky Way. In this work […]


Continue.. Measurement of ultra-high-energy diffuse gamma-ray emission of the Galactic plane from 10 TeV to 1 PeV with LHAASO-KM2A

Measurement of ultra-high-energy diffuse gamma-ray emission of the Galactic plane from 10 TeV to 1 PeV with LHAASO-KM2A

Posted by klaurent Peking

Kavli Affiliate: Li Xin Li | First 5 Authors: Zhen Cao, F. Aharonian, Q. An, Axikegu, Y. X. Bai | Summary: The diffuse Galactic $gamma$-ray emission, mainly produced via interactions between cosmic rays and the diffuse interstellar medium, is a very important probe of the distribution, propagation, and interaction of cosmic rays in the Milky […]


Continue.. Measurement of ultra-high-energy diffuse gamma-ray emission of the Galactic plane from 10 TeV to 1 PeV with LHAASO-KM2A

Measurement of ultra-high-energy diffuse gamma-ray emission of the Galactic plane from 10 TeV to 1 PeV with LHAASO-KM2A

Posted by klaurent Peking

Kavli Affiliate: Li Xin Li | First 5 Authors: Zhen Cao, F. Aharonian, Q. An, Axikegu, Y. X. Bai | Summary: The diffuse Galactic $gamma$-ray emission, mainly produced via interactions between cosmic rays and the diffuse interstellar medium, is a very important probe of the distribution, propagation, and interaction of cosmic rays in the Milky […]


Continue.. Measurement of ultra-high-energy diffuse gamma-ray emission of the Galactic plane from 10 TeV to 1 PeV with LHAASO-KM2A

Kähler-Ricci flow on $mathbf G$-spherical Fano manifolds

Posted by klaurent Berkeley

Kavli Affiliate: Feng Wang | First 5 Authors: Feng Wang, Xiaohua Zhu | Summary: We prove that the Gromov-Hausdorff limit of K”ahler-Ricci flow on a $mathbf G$-spherical Fano manifold $X$ is a $mathbf G$-spherical $mathbb Q$-Fano variety $X_{infty}$, which admits a (singular) K”ahler-Ricci soliton. Moreover, the $mathbf G$-spherical variety structure of $X_{infty}$ can be constructed […]


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Metal-poor stars observed with the Magellan Telescope. IV. Neutron-capture element signatures in 27 main-sequence stars

Posted by dbos MIT

Kavli Affiliate: Anna Frebel | First 5 Authors: Mohammad K. Mardini, Anna Frebel, Leyatt Betre, Heather Jacobson, John E. Norris | Summary: Based on high-resolution spectra obtained with Magellan/MIKE, we present a chemo-dynamical analysis for 27 near main-sequence turnoff metal-poor stars, including 20 stars analyzed for the first time. The sample spans a range in […]


Continue.. Metal-poor stars observed with the Magellan Telescope. IV. Neutron-capture element signatures in 27 main-sequence stars

A quantitative comparison between velocity dependent SIDM cross sections constrained by the gravothermal and isothermal models

Posted by Peking

Shengqi Yang, Fangzhou Jiang, Andrew Benson, Yi-Ming Zhong, Charlie Mace | Summary: [[{“value”:”One necessary step for probing the nature of self-interacting dark matter (SIDM) particles with astrophysical observations is to pin down any possible velocity dependence in the SIDM cross section. Major challenges for achieving this goal include eliminating, or mitigating, the impact of the […]


Continue.. A quantitative comparison between velocity dependent SIDM cross sections constrained by the gravothermal and isothermal models

A quantitative comparison between velocity dependent SIDM cross sections constrained by the gravothermal and isothermal models

Posted by Peking

Shengqi Yang, Fangzhou Jiang, Andrew Benson, Yi-Ming Zhong, Charlie Mace | Summary: [[{“value”:”One necessary step for probing the nature of self-interacting dark matter (SIDM) particles with astrophysical observations is to pin down any possible velocity dependence in the SIDM cross section. Major challenges for achieving this goal include eliminating, or mitigating, the impact of the […]


Continue.. A quantitative comparison between velocity dependent SIDM cross sections constrained by the gravothermal and isothermal models

Constraining SIDM cross section models with a joint analysis of galaxies and clusters

Posted by klaurent Peking

Shengqi Yang, Fangzhou Jiang, Andrew Benson, Yi-Ming Zhong, Charlie Mace | Summary: [[{“value”:”One necessary step for probing the nature of self-interacting dark matter (SIDM) particles with astrophysical observations is to pin down any possible velocity dependence in the SIDM cross section. Major challenges for achieving this goal include eliminating, or mitigating, the impact of the […]


Continue.. Constraining SIDM cross section models with a joint analysis of galaxies and clusters

Exploration biases how forelimb reaches to a spatial target are learned

Posted by klaurent Columbia

Kavli Affiliate: Costa, Rui | Authors: Alice C Mosberger, Leslie J Sibener, Tiffany X Chen, Helio FM Rodrigues, Richard Hormigo, James N Ingram, Vivek R Athalye, Tanya Tabachnik, Daniel M Wolpert, James M Murray and Rui M Costa | Summary: The brain can learn to generate actions, such as reaching to a target, using different […]


Continue.. Exploration biases how forelimb reaches to a spatial target are learned