Zobrazeno 1 - 10
of 364
pro vyhledávání: '"Guseva, N G"'
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
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
Publikováno v:
MNRASL 516, L81 (2022)
Recently, Kojima and co-authors have reported a record low oxygen abundance, 12+logO/H=6.90+/-0.03 in the low-mass star-forming galaxy HSC J1631+4426. This exceptionally low oxygen abundance was obtained by the direct method, using the [OIII]4363 emi
Externí odkaz:
http://arxiv.org/abs/2208.08766
Autor:
Schaerer, D., Marques-Chaves, R., Barrufet, L., Oesch, P., Izotov, Y. I., Naidu, R., Guseva, N. G., Brammer, G.
Publikováno v:
A&A 665, L4 (2022)
Deep images and near-IR spectra of galaxies in the field of the lensing cluster SMACS J0723.3-7327 were recently taken in the Early Release Observations program of JWST. Among these, two NIRSpec spectra of galaxies at $z=7.7$ and one at $z=8.5$ were
Externí odkaz:
http://arxiv.org/abs/2207.10034
Publikováno v:
MNRAS 515, 2864 (2022)
We present observations with the Cosmic Origins Spectrograph onboard the Hubble Space Telescope of seven compact low-mass star-forming galaxies at redshifts, z,in the range 0.3161-0.4276, with various O3Mg2=[OIII]5007/MgII 2796+2803 and Mg2=MgII 2796
Externí odkaz:
http://arxiv.org/abs/2207.04483
Publikováno v:
MNRAS 512, 4298 (2022)
We have studied the spectral time variations of candidate luminous blue variable stars (cLBV) in two low-metallicity blue compact dwarf galaxies, DDO 68 and PHL 293B. The LBV in DDO 68, located in HII region #3, shows an outburst, with an increase of
Externí odkaz:
http://arxiv.org/abs/2203.11630