The KLEVER survey: Nitrogen abundances at $zsim$2 and probing the existence of a fundamental nitrogen relation

Kavli Affiliate: Yingjie Peng | First 5 Authors: Connor Hayden-Pawson, Mirko Curti, Roberto Maiolino, Michele Cirasuolo, Francesco Belfiore | Summary: We present a comparison of the nitrogen-to-oxygen ratio (N/O) in 37 high-redshift galaxies at $zsim$2 taken from the KMOS Lensed Emission Lines and VElocity Review (KLEVER) Survey with a comparison sample of local galaxies, taken […]


Continue.. The KLEVER survey: Nitrogen abundances at $zsim$2 and probing the existence of a fundamental nitrogen relation

The HASHTAG project: The First Submillimeter Images of the Andromeda Galaxy from the Ground

Kavli Affiliate: Yingjie Peng | First 5 Authors: Matthew W. L. Smith, Stephen A. Eales, Thomas G. Williams, Bumhyun Lee, Zongnan Li | Summary: Observing nearby galaxies with submillimeter telescopes on the ground has two major challenges. First, the brightness is significantly reduced at long submillimeter wavelengths compared to the brightness at the peak of […]


Continue.. The HASHTAG project: The First Submillimeter Images of the Andromeda Galaxy from the Ground

Investigating the existence of gravitomagnetic monopole in M87*

Kavli Affiliate: Qingjuan Yu | First 5 Authors: M. Ghasemi-Nodehi, Chandrachur Chakraborty, Qingjuan Yu, Youjun Lu, | Summary: We examine the possibility for the existence of gravitomagnetic monopole ($n_*$) in M87* by using the results obtained from its first Event Horizon Telescope image. By numerically deducing the shadow sizes in Kerr-Taub-NUT (KTN) spacetime, we show […]


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The Eccentric and Accelerating Stellar Binary Black Hole Mergers in Galactic Nuclei: Observing in Ground and Space Gravitational Wave Observatories

Kavli Affiliate: Kohei Inayoshi | First 5 Authors: Fupeng Zhang, Xian Chen, Lijing Shao, Kohei Inayoshi, | Summary: We study the stellar binary black holes (BBHs) inspiralling/merging in galactic nuclei based on our numerical method GNC. We find that $3-40%$ of all new born BBHs will finally merge due to various dynamical effects. In a […]


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Probing Early Super-massive Black Hole Growth and Quasar Evolution with Near-infrared Spectroscopy of 37 Reionization-era Quasars at 6.3 < z <= 7.64

Kavli Affiliate: Linhua Jiang | First 5 Authors: Jinyi Yang, Feige Wang, Xiaohui Fan, Aaron J. Barth, Joseph F. Hennawi | Summary: We report the results of near-infrared spectroscopic observations of 37 quasars in the redshift range $6.3< zle7.64$, including 32 quasars at $z>6.5$, forming the largest quasar near-infrared spectral sample at this redshift. The […]


Continue.. Probing Early Super-massive Black Hole Growth and Quasar Evolution with Near-infrared Spectroscopy of 37 Reionization-era Quasars at 6.3 < z <= 7.64

A [C II] 158$μ$m Emitter Associated with an OI Absorber at the End of the Reionization Epoch

Kavli Affiliate: Ran Wang | First 5 Authors: Yunjing Wu, Zheng Cai, Marcel Neeleman, Kristian Finlator, Shiwu Zhang | Summary: The physical and chemical properties of the circumgalactic medium (CGM) at $zgtrsim6$ have been studied successfully through the absorption in the spectra of background Quasi-Stellar Objects (QSOs). One of the most crucial questions is to […]


Continue.. A [C II] 158$μ$m Emitter Associated with an OI Absorber at the End of the Reionization Epoch

How low can you go? SN 2018zd as a low-mass Fe core-collapse supernova

Kavli Affiliate: Subo Dong | First 5 Authors: E. Callis, M. Fraser, A. Pastorello, Subo Dong, S. J. Brennan | Summary: We present spectroscopy and photometry of SN 2018zd, a Type IIP core-collapse supernova with signatures of interaction with circumstantial material in its earliest spectra. High ionization lines, the earmark of shock breakout, are not […]


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Rotation and deformation of strangeon stars in the Lennard-Jones model

Kavli Affiliate: Lijing Shao | First 5 Authors: Yong Gao, Xiao-Yu Lai, Lijing Shao, Ren-Xin Xu, | Summary: The strong interactions at low energy scales determine the state of the supranuclear matter in the pulsar-like compact objects. It is proposed that the bulk strong matter could be composed of strangeons, which are quark clusters with […]


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Subaru Hyper Suprime-Cam Survey of Cygnus OB2 Complex — I: Introduction, Photometry and Source Catalog

Kavli Affiliate: Gregory J. Herczeg | First 5 Authors: Saumya Gupta, Jessy Jose, Surhud More, Swagat R. Das, Gregory J. Herczeg | Summary: Low mass star formation inside massive clusters is crucial to understand the effect of cluster environment on processes like circumstellar disk evolution, planet and brown dwarf formation. The young massive association of […]


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Hard X-ray Irradiation Potentially Drives Negative AGN Feedback by Altering Molecular Gas Properties

Kavli Affiliate: Claudio Ricci | First 5 Authors: Taiki Kawamuro, Claudio Ricci, Takuma Izumi, Masatoshi Imanishi, Shunsuke Baba | Summary: To investigate the role of active galactic nucleus (AGN) X-ray irradiation on the interstellar medium (ISM), we systematically analyzed Chandra and ALMA CO($J$=2-1) data for 26 ultra-hard X-ray ($>$ 10 keV) selected AGNs at redshifts […]


Continue.. Hard X-ray Irradiation Potentially Drives Negative AGN Feedback by Altering Molecular Gas Properties