Episodic super-Eddington accretion as a clue to Overmassive Black Holes in the early Universe

Posted by klaurent Cambridge

Kavli Affiliate: Roberto Maiolino | Summary:Early JWST observations are providing growing evidence for a ubiquitous population of accreting supermassive black holes (BHs) at high redshift, many of which appear overmassive compared to the empirically-derived local scaling relation between black hole mass and host galaxy stellar mass. In this study, we leverage predictions from the semi-analytical […]


Continue.. Episodic super-Eddington accretion as a clue to Overmassive Black Holes in the early Universe

Hidden in Pixels. I. Discovery of dual “little red dots” indicates excess clustering on kilo-parsec scales

Posted by klaurent Peking

Kavli Affiliate: Kohei Inayoshi | Summary:“Little Red Dots” (LRDs) are an abundant high-redshift population newly discovered by the James Webb Space Telescope (JWST) and considered to be an early growth phase of supermassive black holes (SMBHs). Using a method of pixel-by-pixel color selection and relaxing the compactness criteria, we identify four dual LRD candidates in […]


Continue.. Hidden in Pixels. I. Discovery of dual “little red dots” indicates excess clustering on kilo-parsec scales

Hidden in Pixels I: Discovery of dual “little red dots” indicates excess clustering on kilo-parsec scales

Posted by klaurent Peking

Kavli Affiliate: Kohei Inayoshi | Summary:“Little Red Dots” (LRDs) are an abundant high-redshift population newly discovered by the James Webb Space Telescope (JWST) and considered to be an early growth phase of supermassive black holes (SMBHs). Using a method of pixel-by-pixel color selection and relaxing the compactness criteria, we identify four dual LRD candidates in […]


Continue.. Hidden in Pixels I: Discovery of dual “little red dots” indicates excess clustering on kilo-parsec scales

Discovery of dual “little red dots” indicates excess clustering on kilo-parsec scales

Posted by dbos Peking

Kavli Affiliate: Kohei Inayoshi | First 5 Authors: Takumi S. Tanaka, John D. Silverman, Kazuhiro Shimasaku, Junya Arita, Hollis B. Akins | Summary: “Little Red Dots” (LRDs) are an abundant high-redshift population newly discovered by the James Webb Space Telescope (JWST). They are characterized by a red color in the rest-frame optical band, compact morphology, […]


Continue.. Discovery of dual “little red dots” indicates excess clustering on kilo-parsec scales

Discovery of dual “little red dots” indicates excess clustering on kilo-parsec scales

Posted by dbos Peking

Kavli Affiliate: Kohei Inayoshi | First 5 Authors: Takumi S. Tanaka, John D. Silverman, Kazuhiro Shimasaku, Junya Arita, Hollis B. Akins | Summary: “Little Red Dots” (LRDs) are an abundant high-redshift population newly discovered by the James Webb Space Telescope (JWST). They are characterized by a red color in the rest-frame optical band, compact morphology, […]


Continue.. Discovery of dual “little red dots” indicates excess clustering on kilo-parsec scales

Discovery of dual “little red dots” indicates excess clustering on kilo-parsec scales

Posted by dbos Tokyo

Kavli Affiliate: John D. Silverman | First 5 Authors: Takumi S. Tanaka, John D. Silverman, Kazuhiro Shimasaku, Junya Arita, Hollis B. Akins | Summary: “Little Red Dots” (LRDs) are an abundant high-redshift population newly discovered by the James Webb Space Telescope (JWST). They are characterized by a red color in the rest-frame optical band, compact […]


Continue.. Discovery of dual “little red dots” indicates excess clustering on kilo-parsec scales

Filtering in CMB data analysis with application to ACT DR4 and Planck observations

Posted by klaurent Cambridge

Kavli Affiliate: Anthony Challinor | Summary:Motivated by observed discrepancies between the Atacama Cosmology Telescope Data Release 4 (ACT DR4) and Planck 2018 cosmic microwave background (CMB) anisotropy power spectra, particularly in the cross-correlation of temperature and E-mode polarization, we investigate challenges that may be encountered in the comparison of satellite and ground-based CMB data. In […]


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Distinct amplitude mode dynamics upon resonant and off-resonant excitation across the charge density wave energy gap in LaTe3 investigated by time- and angle-resolved photoemission spectroscopy

Posted by klaurent Caltech

Kavli Affiliate: Linda Ye| Summary:Non-equilibrium states generated by ultrafast laser pulses are characterized by specific phenomena that are not accessible in static measurements. Previous time- and angle-resolved photoemission spectroscopy (TARPES) studies on rare-earth tritelluride materials have revealed the laser-driven melting of the charge density wave order as well as its collective amplitude mode excitation. Variation […]


Continue.. Distinct amplitude mode dynamics upon resonant and off-resonant excitation across the charge density wave energy gap in LaTe3 investigated by time- and angle-resolved photoemission spectroscopy

Near-Infrared noise in intense electron bunches

Posted by klaurent Tokyo

Kavli Affiliate: Young-kee Kim | Summary:This article investigates electron bunch density fluctuations in the 1 – 10 $μm$ wavelength range, focusing on their impact on coherent electron cooling (CEC) in hadron storage rings. In this study, we thoroughly compare the shot-noise model with experimental observations of optical transition radiation (OTR) generated by a relativistic electron […]


Continue.. Near-Infrared noise in intense electron bunches