Kavli Affiliate: Linhua Jiang | First 5 Authors: Zhiwei Pan, Linhua Jiang, Xiaohui Fan, Jin Wu, Jinyi Yang | Summary: We present a well-designed sample of more than 1000 type 1 quasars at $3.5<z<5$ and derive UV quasar luminosity functions (QLFs) in this redshift range. These quasars were selected using the Sloan Digital Sky Survey […]
Kavli Affiliate: Linhua Jiang | First 5 Authors: Yuanhang Ning, Linhua Jiang, Zhen-Ya Zheng, Jin Wu, | Summary: We present a sample of Ly{alpha} emitters (LAEs) at $zapprox6.6$ from our spectroscopic survey of high-redshift galaxies using the multi-object spectrograph M2FS on the Magellan Clay telescope. The sample consists of 36 LAEs selected by the narrow-band […]
Kavli Affiliate: Linhua Jiang | First 5 Authors: Shu Wang, Linhua Jiang, Yue Shen, Luis C. Ho, Marianne Vestergaard | Summary: Broad line regions (BLRs) in high-redshift quasars provide crucial information of chemical enrichment in the early universe. Here we present a study of BLR metallicities in 33 quasars at redshift $5.7<z<6.4$. Using the near-IR […]
Kavli Affiliate: Mark Vogelsberger | First 5 Authors: Minjung Park, Sandro Tacchella, Erica J. Nelson, Lars Hernquist, Rainer Weinberger | Summary: Observations have shown that the star-formation activity and the morphology of galaxies are closely related, but the underlying physical connection is not well understood. Using the TNG50 simulation, we explore the quenching and the […]
Kavli Affiliate: Yingjie Peng | First 5 Authors: Joanna M. Piotrowska, Asa F. L. Bluck, Roberto Maiolino, Yingjie Peng, | Summary: In this paper we investigate how massive central galaxies cease their star formation by comparing theoretical predictions from cosmological simulations: EAGLE, Illustris and IllustrisTNG with observations of the local Universe from the Sloan Digital […]
Kavli Affiliate: George R. Ricker | First 5 Authors: Rahul Jayaraman, Swetlana Hubrig, Daniel L. Holdsworth, Markus Schöller, Silva Järvinen | Summary: We report the detection and characterization of a new magnetospheric star, HD 135348, based on photometric and spectropolarimetric observations. The TESS light curve of this star exhibited variations consistent with stars known to […]
Kavli Affiliate: Yingjie Peng | First 5 Authors: Rui Shi, Wenting Wang, Zhaozhou Li, Jiaxin Han, Jingjing Shi | Summary: We propose a random forest (RF) machine learning approach to determine the accreted stellar mass fractions ($f_mathrm{acc}$) of central galaxies, based on various dark matter halo and galaxy features. The RF is trained and tested […]
Kavli Affiliate: Seth Digel | First 5 Authors: Elena Orlando, Eugenio Bottacini, Alexander Moiseev, Arash Bodaghee, Werner Collmar | Summary: The sky at MeV energies is currently poorly explored. Here we present an innovative mission concept that builds on and improves past and currently proposed missions at such energies. We outline the motivations for combining […]
Kavli Affiliate: Sven Herrmann | First 5 Authors: Elena Orlando, Eugenio Bottacini, Alexander Moiseev, Arash Bodaghee, Werner Collmar | Summary: The sky at MeV energies is currently poorly explored. Here we present an innovative mission concept and we outline the scientific motivation for combining a coded mask and a Compton telescope. The Galactic Explorer with […]
Kavli Affiliate: Zhuo Li | First 5 Authors: Zhuo Li, , , , | Summary: Capturing long-range dependency and modeling long temporal contexts is proven to benefit speaker verification tasks. In this paper, we propose the combination of the Hierarchical-Split block(HS-block) and the Depthwise Separable Self-Attention(DSSA) module to capture richer multi-range context speaker features from […]