Zobrazeno 1 - 10
of 18 318
pro vyhledávání: '"QSOS"'
Autor:
Kim, Yongjung, Kim, Minjin, Im, Myungshin, Chang, Seo-Won, Jeong, Mankeun, Byun, Woowon, Kim, Joonho, Kim, Dohyeong, Shim, Hyunjin, Song, Hyunmi
We present a catalog of unobscured QSO candidates in the southern hemisphere from the early interim data of the KMTNet Synoptic Survey of Southern Sky (KS4). The KS4 data covers $\sim2500\,{\rm deg}^{2}$ sky area, reaching 5$\sigma$ detection limits
Externí odkaz:
http://arxiv.org/abs/2410.17187
Autor:
Luo, Yuanze, Petric, A. O., Janssen, R. M. J., Fadda, D., Flagey, N., Omont, A., Jacob, A. M., Rowlands, K., Alatalo, K., Billot, N., Heckman, T., Husemann, B., Kakkad, D., Lacy, M., Marshall, J., Minchin, R., Minsley, R., Nesvadba, N., Otter, J. A., Patil, P., Urrutia, T.
We present observations of CO(1--0) and CO(2--1) lines from the Institut de radioastronomie millim\'etrique (IRAM) 30m telescope toward 20 nearby, optically luminous type 2 quasars (QSO2s) and observations of [C II] 158$\mu$m line from the Stratosphe
Externí odkaz:
http://arxiv.org/abs/2410.04641
Autor:
Ighina, L., Caccianiga, A., Moretti, A., Broderick, J. W., Leung, J. K., López-Sánchez, A. R., Rigamonti, F., Seymour, N., An, T., Belladitta, S., Bisogni, S., Della Ceca, R., Drouart, G., Gargiulo, A., Liu, Y.
We present a multi-wavelength study on three new $z\sim5.6$ quasi stellar objects (QSOs) selected based on their radio and optical/near-infrared properties in publicly available surveys and then identified with dedicated spectroscopic observations. T
Externí odkaz:
http://arxiv.org/abs/2407.04094
Publikováno v:
A&A 687, A57 (2024)
Context. Periodic QSOs are considered as candidates of supermassive binary black hole (BBH) systems in galactic centers. Further confirmation of these candidates may require different lines of observational evidences. Aims. Assuming the Doopler boost
Externí odkaz:
http://arxiv.org/abs/2404.05975
Autor:
Greig, Bradley, Bosman, Sarah E. I., Davies, Frederick B., Ďurovčíková, Dominika, Fathivavsari, Hassan, Liu, Bin, Meyer, Romain A., Sun, Zechang, D'Odorico, Valentina, Gallerani, Simona, Mesinger, Andrei, Ting, Yuan-Sen
Reconstructing the intrinsic Ly$\alpha$ line flux from high-$z$ QSOs can place constraints on the neutral hydrogen content of the intergalactic medium during reionisation. There are now $\gtrsim10$ different Ly$\alpha$ reconstruction pipelines using
Externí odkaz:
http://arxiv.org/abs/2404.01556
The James Webb Space Telescope (JWST) is reporting unexpectedly massive high redshift galaxies that appear challenging from the $\Lambda$CDM perspective. Interpreted as a problem of cosmological origin, this necessitates Planck underestimating either
Externí odkaz:
http://arxiv.org/abs/2405.19953
Autor:
King, Andrew
Observations of high-redshift quasars frequently promote suggestions of large black hole masses, whose presence so early in cosmic time is not easily explicable. I consider the parallel with ultraluminous X-ray sources (ULXs) -- now known to be stell
Externí odkaz:
http://arxiv.org/abs/2404.16832
Autor:
Georgakakis, A., Buchner, J., Ruiz, A., Boller, T., Akylas, A., Paolillo, M., Salvato, M., Merloni, A., Nandra, K., Dwelly, T.
Although flux variability is one of the defining properties of accretion flows onto supermassive black holes, its dependence on physical parameters such as the mass of the compact object and the Eddington ratio remain under discussion. In this paper
Externí odkaz:
http://arxiv.org/abs/2401.17285
Autor:
Fawcett, V. A., Alexander, D. M., Brodzeller, A., Edge, A. C., Rosario, D. J., Myers, A. D., Aguilar, J., Ahlen, S., Alfarsy, R., Brooks, D., Canning, R., Circosta, C., Dawson, K., de la Macorra, A., Doel, P., Fanning, K., Font-Ribera, A., Forero-Romero, J. E., Gontcho, S. Gontcho A, Guy, J., Harrison, C. M., Honscheid, K., Juneau, S., Kehoe, R., Kisner, T., Kremin, A., Landriau, M., Manera, M., Meisner, A. M., Miquel, R., Moustakas, J., Nie, J., Percival, W. J., Poppett, C., Pucha, R., Rossi, G., Schlegel, D., Siudek, M., Tarlé, G., Weaver, B. A., Zhou, Z., Zou, H.
We present the first eight months of data from our secondary target program within the ongoing Dark Energy Spectroscopic Instrument (DESI) survey. Our program uses a mid-infrared and optical colour selection to preferentially target dust-reddened QSO
Externí odkaz:
http://arxiv.org/abs/2308.14790
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