Search Results - "Guseva, G. N."

Detection of high Lyman continuum leakage from four low-redshift compact star-forming galaxies by Izotov, Y. I., Schaerer, D., Thuan, T. X., Worseck, G., Guseva, N. G., Orlitová, I., Verhamme, A.

“…Following our first detection reported in Izotov et al., we present the detection of Lyman continuum (LyC) radiation of four other compact star-forming…”
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J0811+4730: the most metal-poor star-forming dwarf galaxy known by Izotov, Y. I., Thuan, T. X., Guseva, N. G., Liss, S. E.

“…Abstract We report the discovery of the most metal-poor dwarf star-forming galaxy (SFG) known to date, J0811+4730. This galaxy, at a redshift z = 0.04444, has…”
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Eight per cent leakage of Lyman continuum photons from a compact, star-forming dwarf galaxy by Izotov, Y. I., Orlitová, I., Schaerer, D., Thuan, T. X., Verhamme, A., Guseva, N. G., Worseck, G.

“…Far-ultraviolet observations of the nearby low-mass star-forming galaxy J0925+1403 show that the galaxy is leaking ionizing radiation with an escape fraction…”
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Properties of five z ∼ 0.3–0.4 confirmed LyC leakers: VLT/XShooter observations by Guseva, N G, Izotov, Y I, Schaerer, D, Vílchez, J M, Amorín, R, Pérez-Montero, E, Iglesias-Páramo, J, Verhamme, A, Kehrig, C, Ramambason, L

“…ABSTRACT Using new Very Large Telescope (VLT)/XShooter spectral observations we analyse the physical properties of five z ∼ 0.3–0.4 confirmed Lyman continuum…”
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J1234+3901: an extremely metal-deficient compact star-forming dwarf galaxy at redshift 0.133 by Izotov, Y I, Thuan, T X, Guseva, N G

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A new determination of the primordial He abundance using the He i λ10830 Å emission line: cosmological implications by Izotov, Y. I., Thuan, T. X., Guseva, N. G.

“…We present near-infrared (NIR) spectroscopic observations of the high-intensity He i λ10830 Å emission line in 45 low-metallicity H ii regions. We combined…”
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Low-redshift Lyman continuum leaking galaxies with high [O iii]/[O ii] ratios by Izotov, Y I, Worseck, G, Schaerer, D, Guseva, N G, Thuan, T X, Fricke, Verhamme, A, Orlitová, I

“…ABSTRACT We present observations with the Cosmic Origins Spectrograph (COS) onboard the Hubble Space Telescope of five star-forming galaxies at redshifts $z$…”
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J2229+2725: an extremely low metallicity dwarf compact star-forming galaxy with an exceptionally high [O iii]λ5007/[O ii]λ3727 flux ratio of 53 by Izotov, Y I, Thuan, T X, Guseva, N G

“…ABSTRACT Using the Large Binocular Telescope (LBT)/Multi-Object Dual Spectrograph (MODS), we have obtained optical spectroscopy of one of the most metal-poor…”
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Lyman continuum leakage from low-mass galaxies with M⋆ < 108 M by Izotov, Y I, Worseck, G, Schaerer, D, Guseva, N G, Chisholm, J, Thuan, T X, Fricke, K J, Verhamme, A

“…ABSTRACT We present observations with the Cosmic Origins Spectrograph onboard the Hubble Space Telescope of nine low-mass star-forming galaxies at redshifts,…”
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J1154+2443: a low-redshift compact star-forming galaxy with a 46 per cent leakage of Lyman continuum photons by Izotov, Y I, Schaerer, D, Worseck, G, Guseva, N G, Thuan, T X, Verhamme, A, Orlitová, I, Fricke, K J

“…Abstract We report the detection of the Lyman continuum (LyC) radiation of the compact star-forming galaxy (SFG) J1154+2443 observed with the Cosmic Origins…”
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Diverse properties of Ly α emission in low-redshift compact star-forming galaxies with extremely high [O iii]/[O ii] ratios by Izotov, Y I, Schaerer, D, Worseck, G, Verhamme, A, Guseva, N G, Thuan, T X, Orlitová, I, Fricke, K J

“…We present observations with the Cosmic Origins Spectrograph onboard the Hubble Space Telescope of eight compact star-forming galaxies at redshifts z =…”
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Large binocular telescope observations of new six compact star-forming galaxies with [Ne v] λ3426 Å emission by Izotov, Y I, Thuan, T X, Guseva, N G

“…ABSTRACT We report the discovery of [Ne v] λ3426 emission, in addition to He ii λ4686 emission, in six compact star-forming galaxies. These observations…”
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Optical spectroscopy of the extremely metal-deficient star-forming galaxy HSC J1631+4426: a test of the strong-line method by Thuan, T X, Guseva, N G, Izotov, Y I

“…ABSTRACT Recently, Kojima and co-authors have reported a record low oxygen abundance, 12 + logO/H = 6.90 ± 0.03, or 1.6 per cent of solar metallicity, in the…”
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Monitoring broad emission-line components in spectra of the two low-metallicity dwarf compact star-forming galaxies SBS 1420+540 and J1444+4840 by Guseva, N G, Thuan, T X, Izotov, Y I

“…ABSTRACT 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…”
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J1046+4047: an extremely low-metallicity dwarf star-forming galaxy with O32 = 57 by Izotov, Y I, Thuan, T X, Guseva, N G

“…ABSTRACT Using the optical spectrum obtained with the Kitt Peak Ohio State Multi-Object Spectrograph mounted on the Apache Point Observatory 3.5 m Telescope…”
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Lyman alpha and Lyman continuum emission of Mg  ii -selected star-forming galaxies by Izotov, Y I, Chisholm, J, Worseck, G, Guseva, N G, Schaerer, D, Prochaska, J X

“…We present observations with the Cosmic Origins Spectrograph onboard the Hubble Space Telescope of seven compact low-mass star-forming galaxies at redshifts,…”
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Decade-long time-monitoring of candidate luminous blue variable stars in the two very metal-deficient star-forming galaxies DDO 68 and PHL 293B by Guseva, N G, Thuan, T X, Izotov, Y I

“…ABSTRACT We have studied the spectral time variations of candidate luminous blue variable (cLBV) stars in two low-metallicity star-forming galaxies, DDO 68 and…”
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The efficiency of ionizing photon production and the radiation energy balance in compact star-forming galaxies by Izotov, Y. I., Guseva, N. G., Fricke, K. J., Henkel, C., Schaerer, D.

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On the universality of luminosity–metallicity and mass–metallicity relations for compact star-forming galaxies at redshifts 0 < z < 3 by Izotov, Y. I., Guseva, N. G., Fricke, K. J., Henkel, C.

“…We study relations between global characteristics of low-redshift (0 < z < 1) compact star-forming galaxies, including absolute optical magnitudes, H β…”
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Ly α emission in low-redshift most metal-deficient compact star-forming galaxies by Izotov, Y I, Thuan, T X, Guseva, N G, Schaerer, D, Worseck, G, Verhamme, A

“…ABSTRACT We present observations with the Cosmic Origins Spectrograph onboard the Hubble Space Telescope of nine most metal-deficient compact star-forming…”
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