Zobrazeno 1 - 10
of 3 687
pro vyhledávání: '"Izotov, A A"'
Autor:
Gazagnes, S., Chisholm, J., Endsley, Ryan, Berg, D. A., Leclercq, F., Jurlin, N., Saldana-Lopez, A., Finkelstein, S. L., Flury, S. R., Guseva, N. G., Henry, A., Izotov, Y. I., Jung, I., Matthee, J., Schaerer, D.
We present indirect constraints on the absolute escape fraction of ionizing photons ($f_{\rm esc}^{\rm LyC}$) of the system GN 42912 which comprises two luminous galaxies ($M_{\rm UV}$ magnitudes of -20.89 and -20.37) at $z\sim7.5$, GN 42912-NE and G
Externí odkaz:
http://arxiv.org/abs/2410.03337
Autor:
Chisholm, J., Berg, D. A., Endsley, R., Gazagnes, S., Richardson, C. T., Lambrides, E., Greene, J., Finkelstein, S., Flury, S., Guseva, N. G., Henry, A., Hutchison, T. A., Izotov, Y. I., Marques-Chaves, R., Oesch, P., Papovich, C., Saldana-Lopez, A., Schaerer, D., Stephenson, M. G.
Here we present high spectral resolution $\textit{JWST}$ NIRSpec observations of GN42437, a low-mass (log(M$_\ast/M_\odot)=7.9$), compact ($r_e < 500$pc), extreme starburst galaxy at $z=5.59$ with 13 emission line detections. GN42437 has a low-metall
Externí odkaz:
http://arxiv.org/abs/2402.18643
Autor:
Leclercq, Floriane, Chisholm, John, King, Wichahpi, Zeimann, Greg, Jaskot, Anne E., Henry, Alaina, Hayes, Matthew, Flury, Sophia R., Izotov, Yuri, Prochaska, Xavier J., Verhamme, Anne, Amorín, Ricardo O., Atek, Hakim, Bait, Omkar, Blaizot, Jérémy, Carr, Cody, Ji, Zhiyuan, Reste, Alexandra Le, Ferguson, Harry C., Gazagnes, Simon, Heckman, Timothy, Komarova, Lena, Marques-Chaves, Rui, Östlin, Göran, Saldana-Lopez, Alberto, Scarlata, Claudia, Schaerer, Daniel, Thuan, Trinh X., Trebitsch, Maxime, Worseck, Gábor, Wang, Bingjie, Xu, Xinfeng
Publikováno v:
A&A 687, A73 (2024)
The geometry of the neutral gas in and around galaxies is a key regulator of the escape of ionizing photons. We present the first statistical study aiming at linking the neutral and ionized gas distributions to the Lyman continuum (LyC) escape fracti
Externí odkaz:
http://arxiv.org/abs/2401.14981
Autor:
Amorín, R. O., Rodríguez-Henríquez, M., Fernández, V., Vílchez, J. M., Marques-Chaves, R., Schaerer, D., Izotov, Y. I., Firpo, V., Guseva, N., Jaskot, A. E., Komarova, L., Muñoz-Vergara, D., Oey, M. S., Bait, O., Carr, C., Chisholm, J., Ferguson, H., Flury, S. R., Giavalisco, M., Hayes, M. J., Henry, A., Ji, Z., King, W., Leclercq, F., Östlin, G., Pentericci, L., Saldana-Lopez, A., Thuan, T. X., Trebitsch, M., Wang, B., Worseck, G., Xu, X.
We report observational evidence of highly turbulent ionized gas kinematics in a sample of 20 Lyman continuum (LyC) emitters (LCEs) at low redshift ($z\sim 0.3$). Detailed Gaussian modeling of optical emission line profiles in high-dispersion spectra
Externí odkaz:
http://arxiv.org/abs/2401.04278
Publikováno v:
MNRAS 527, 3932 (2024)
We report the discovery of broad components with P-Cygni profiles of the hydrogen and helium emission lines in the two low-redshift low-metallicity dwarf compact star-forming galaxies (SFG), SBS 1420+540 and J1444+4840. We found small stellar masses
Externí odkaz:
http://arxiv.org/abs/2311.08286
Publikováno v:
MNRAS 527, 3486 (2024)
Using the optical spectrum obtained with the Kitt Peak Ohio State Multi-Object Spectrograph (KOSMOS) mounted on the Apache Point Observatory (APO) 3.5m Telescope and the Sloan Digital Sky Survey (SDSS) spectrum, we study the properties of one of the
Externí odkaz:
http://arxiv.org/abs/2311.01799
Publikováno v:
MNRAS 528, L10 (2024)
Using Hubble Space Telescope (HST)/Cosmic Origins Spectrograph (COS) observations of one of the most metal-poor dwarf star-forming galaxies (SFG) in the local Universe, J2229+2725, we have discovered an extremely strong nebular CIV 1549, 1551 emissio
Externí odkaz:
http://arxiv.org/abs/2311.02015
Publikováno v:
MNRAS 527, 281 (2024)
We present observations with the Cosmic Origins Spectrograph onboard the Hubble Space Telescope of nine most metal-deficient compact star-forming galaxies with oxygen abundances 12+log(O/H)=6.97-7.23, redshifts z=0.02811-0.13320, and stellar masses M
Externí odkaz:
http://arxiv.org/abs/2310.08441
USE OF UNMANNED TRANSPORTATION VEHICLES IN DELIVERY OF ROLLED METAL PRODUCTS AND NAVIGATION PROBLEMS
Autor:
Anton I. Izotov
Publikováno v:
International Journal of Advanced Studies, Vol 14, Iss 3, Pp 43-61 (2024)
The article offers a comprehensive analysis of unmanned automotive vehicles in logistics, focusing particularly on the transportation of rolled steel products. It discusses key aspects of integrating and operating UAVs, highlighting their economic ef
Externí odkaz:
https://doaj.org/article/e3774a5a51c64b18b9b5e56029b36d7c
Autor:
Marques-Chaves, R., Schaerer, D., Kuruvanthodi, A., Korber, D., Prantzos, N., Charbonnel, C., Weibel, A., Izotov, Y. I., Messa, M., Brammer, G., Dessauges-Zavadsky, M., Oesch, P.
Publikováno v:
A&A 681, A30 (2024)
[Abridged] Using the JWST/NIRSpec observations from CEERS we found an extreme N-emitter, CEERS-1019 at z=8.6782 showing intense NIV and NIII emission. From the observed rest-UV and optical lines we conclude that it is compatible with photoionization
Externí odkaz:
http://arxiv.org/abs/2307.04234