Kavli Affiliate: Kohei Inayoshi | Summary:From the onset of observations of JWST we have discovered unexpectedly luminous galaxies at redshifts $z>10$ and as high as $z=14$. With their discovery, the question immediately followed as to where their progenitors are, since such progenitors should be within reach of existing surveys. However, the discovery of several bright […]
Kavli Affiliate: Kohei Inayoshi | Summary:From the onset of observations of JWST we have discovered unexpectedly luminous galaxies at redshifts $z>10$ and as high as $z=14$. With their discovery, the question immediately followed as to where their progenitors are, since such progenitors should be within reach of existing surveys. However, the discovery of several bright […]
Kavli Affiliate: Huawei Zhang | Summary:We report the discovery of DESI-HVS1, a hypervelocity star (HVS) candidate identified from DESI DR1 spectroscopy and Gaia DR3 astrometry. DESI-HVS1 is an old, low-mass, metal-poor F-type star with a mass of $0.8,M_odot$, an age of $sim14.1$~Gyr, and $mathrm[Fe/H]=-1.6$. It is located at a heliocentric distance of $3.77^+0.39_-0.36$~kpc and has […]
Kavli Affiliate: Huawei Zhang | Summary:We report the discovery of DESI-HVS1, a hypervelocity star (HVS) candidate identified from DESI DR1 spectroscopy and Gaia DR3 astrometry. DESI-HVS1 is an old, low-mass, metal-poor F-type star with a mass of $0.8,M_odot$, an age of $sim14.1$~Gyr, and $mathrm[Fe/H]=-1.6$. It is located at a heliocentric distance of $3.77^+0.39_-0.36$~kpc and has […]
Kavli Affiliate: Lijing Shao | Summary:Ringdown signals from perturbed black holes (BHs) offer a clean window into BH spacetime, strong-field gravity, and fundamental physics. Presently the quasi-normal modes of stellar-mass BH ringdowns have been successfully extracted in the ground-based gravitational wave (GW) observations. Looking ahead, the future space-borne observatories will listen to the ringdowns from […]
Kavli Affiliate: Claudio Ricci | Summary:We use high-resolution UV-to-optical imaging from the Hubble Space Telescope (HST) to construct spatially resolved spectral energy distributions (SEDs) for seven nearby ($z<0.07$) hard (14–195$,$keV) X-ray-selected broad-line active galactic nuclei (AGN) with $L_rm bol=10^43.26-10^45.34,rmerg,s^-1$. The high spatial resolution of HST, which physically resolves structures on the scale of $sim$50$,$pc at […]
Kavli Affiliate: Lile Wang |Summary:We present high-angular-resolution ($sim0.05^primeprime$) ALMA Band~6 observations from the HOTDISK project (Hot-Origin Tracer survey of DISKs of massive protostars) aimed at investigating the "hot-disk" chemical pattern traced by vibrationally excited water, NaCl, SiS, and SiO in the innermost regions around massive protostars. Ten targets were selected based on strong CH$_3$CN emission […]
Kavli Affiliate: Lile Wang |Summary:We present high-angular-resolution ($sim0.05^primeprime$, $sim 60-250$ au) ALMA Band~6 observations from the HOTDISK project (Hot-Origin Tracer survey of DISKs of massive protostars) aimed at investigating the "hot-disk" chemical pattern traced by vibrationally excited water, NaCl, SiS, and SiO in the innermost regions around massive protostars. Ten targets were selected based on […]
Kavli Affiliate: Luis Ho | Summary:To reveal the physical origin of the changing-look (CL) phenomenon in NGC 3786, which transitioned from type 1.8/1.9 to type 1, we present an analysis of long-term spectral monitoring in the optical and near-infrared obtained with Gemini/GMOS-N and Gemini/GNIRS, respectively. Since the onset of the CL phenomenon, NGC 3786 has […]
Kavli Affiliate: Claudio Ricci | Summary:We present an analysis of XRISM and NuSTAR data obtained for the nearby low-Eddington active galactic nucleus NGC 7213. Our goal is to examine whether its He-like and H-like iron emission lines can be reproduced by photoionization or collisional ionization processes. Using the broad-band energy coverage of our data (2-60 […]