Lyman continuum leakage from low-mass galaxies with M⋆ < 108 M⊙

Autor: Natalia G. Guseva, Daniel Schaerer, Yuri I. Izotov, Klaus J. Fricke, Anne Verhamme, Trinh X. Thuan, Gabor Worseck, John Chisholm

Publikováno v: Monthly Notices of the Royal Astronomical Society. 503:1734-1752

We present observations with the Cosmic Origins Spectrograph onboard the Hubble Space Telescope of nine low-mass star-forming galaxies at redshifts, z, in the range 0.3179–0.4524, with stellar masses $M_\star \, \lt $ 108 M⊙ and very high specifi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f08a765f0d1a0601cb4c9613ee98d287
https://doi.org/10.1093/mnras/stab612

J2229+2725: an extremely low-metallicity dwarf compact star-forming galaxy with an exceptionally high [OIII]5007/[OII]3727 flux ratio of 53

Autor: Yuri I. Izotov, Natalia G. Guseva, Trinh X. Thuan

Using the Large Binocular Telescope (LBT)/Multi-Object Dual Spectrograph (MODS), we have obtained optical spectroscopy of one of the most metal-poor dwarf star-forming galaxies (SFG) in the local Universe, J2229+2725. This galaxy with a redshift z=0.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1fda92b04c8a0636b9887b9b993d1448
http://arxiv.org/abs/2104.08035

The frequency of very young galaxies in the local Universe - II. The view from SDSS spectra

Autor: Gary A Mamon, Marina Trevisan, Trinh X Thuan, Anna Gallazzi, Romeel Davé

Publikováno v: Mamon, G A, Trevisan, M, Thuan, T X, Gallazzi, A & Davé, R 2020, ' The frequency of very young galaxies in the local Universe-II. The view from SDSS spectra ', Monthly Notices of the Royal Astronomical Society, vol. 492, no. 2, pp. 1791-1811 . https://doi.org/10.1093/mnras/stz3556
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS

Only a handful of galaxies in the local Universe appear to be very young. We estimate the fraction of very young galaxies (VYGs), defined as those with more than half their stellar masses formed within the last Gyr. We fit non-parametric star formati

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a31290856bcb79eadb14cb0d5dfd7499
https://www.pure.ed.ac.uk/ws/files/250789532/1912.06522v2.pdf

The Low-redshift Lyman-continuum Survey: [S ii] Deficiency and the Leakage of Ionizing Radiation

Autor: Zhiyuan Ji, Bingjie Wang, Sophia Flury, Kirill Makan, Ricardo Amorín, Göran Östlin, Xinfeng Xu, Andrea Grazian, M. S. Oey, Trinh X. Thuan, Daniel Schaerer, Anne Jaskot, Gabor Worseck, John Chisholm, Alberto Saldana-Lopez, Mauro Giavalisco, Matthew Hayes, Henry C. Ferguson, Sanchayeeta Borthakur, Alaina Henry, Stephan R. McCandliss, Timothy M. Heckman

Publikováno v: The Astrophysical Journal. 916:3

The relationship between galaxy characteristics and the reionization of the universe remains elusive, mainly due to the observational difficulty in accessing the Lyman continuum (LyC) at these redshifts. It is thus important to identify low-redshift

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bab7716806067ea9d5c06ed94330ae7f
https://doi.org/10.3847/1538-4357/ac0434

Isolated groups of extremely blue dwarf galaxies

Autor: Trinh X. Thuan, Angela Krabbe, Yuri I. Izotov, Vitor Bootz, Marina Trevisan, Oli L. Dors

Publikováno v: Proceedings of the International Astronomical Union. 15:168-169

Interactions and mergers between dwarf galaxies are mostly gas-rich and should be marked by an intense star formation activity. But these processes, which are expected to be common at earlier times, are very difficult to observe at low redshifts. To

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::71511f7263eaeef38fc273e35bc70247
https://doi.org/10.1017/s1743921320001830