HEII1640

Reconstruction of the CIV1549, HeII1640, OIII]1663 line profile ...

The emission-line fluxes of NV 1240, CIV1549, and HeII1640 were used to estimate the metallicity of the line emitting gas. The line ratios... | Quasars, Emission ...

heii1640

High-resolution spectroscopy of a young, low-metallicity optically ...

4 Mar 2019 ... We measured CIV1548,1550, HeII1640, OIII]1661,1666, CIII]1907,1909, Hbeta, [ OIII]4959,5007, emission lines with FWHM< 50 km/s and ...

heii1640

HeII 1640

logN=12; V=150 km/s [fits ] logN=12; V=200 km/s [fits ] logN=12; V=300 km/s [fits ] logN=12; V=400 km/s [fits ] logN=12; V=500 km/s [fits ] logN=10; V=300 km/s ...

heii1640

The R136 star cluster dissected with Hubble Space Telescope/STIS ...

16 Mar 2019 ... The presence of strong HeII 1640 emission in the integrated light of very young star clusters (e.g A1 in NGC 3125) favours an initial mass ...

heii1640

Ly-alpha and HeII 1640 emission and the ionising properties of high ...

22 Oct 2002 ... Non-negligible HeII 1640 emission due to stellar photoionisation appears to be limited to very low metallicities and Population III objects.

heii1640

Themiya Nanayakkara

MUSE HeII1640 analysis at z = 2~4 (Proceedings IAU Symposium No. 347, 2019 : ... Probing the ISM of HeII1640 emitters at z = 2~4 via MUSE (Proceedings IAU ...

heii1640

Elemental Abundance Estimates at High Redshifts

It was shown that NV1240 vs.CIV1549 and NV1240. vs.HeII1640 provide information about the chemical. composition of the gas (cf. Hamann & Ferland 1999 for ...

heii1640

Boosting Lya and HeII1640 luminosities in population III galaxies

heii1640

Elemental abundances of high redshift quasars - NASA/ADS

The emission-line fluxes of NV 1240, CIV1549, and HeII1640 were used to estimate the metallicity of the line emitting gas. The line ratios were investigated ...

heii1640

Population mechanisms for the He(+) N = 3 levels determined from ...

The intensities of the 3s-2p, 3p-2s, and 3d-2p components of the Heii 1640 A line have been measured from solar data taken by the NRL slit spectrograph on ...

heii1640

High Redshift Quasars and Star Formation History

The emission line ratios of NV1240 to CIV1549 and HeII1640 are used as well as MgII2798 vs.FeIIUV. The relative strength of these ratios indicates that the first ...

heii1640

Spectroscopic Study of High Redshift Quasars

the line ratios NV1240/CIV1549, NV1240/HeII1640, and. OVI1034/HeII1640 as suggested by Hamann & Ferland. (1992,1999). Based on chemical evolutionary  ...

heii1640

Search for the HeII 1640 line signature of PopIII stars in az = 6.5 galaxy

20 Jun 2008 ... Theoretical models foresee that the first generation(s) of stars forming from primordial material should have a top-heavy IMF (e.g Schneider et ...

heii1640

Elemental Abundance Estimates at High Redshifts

NV1240/HeII1640 as well as of MgII2798/FeIIUV. We. make use of the different enrichment processes of primary. elements like carbon to secondary elements ...

heii1640

The VIMOS Ultra-Deep Survey: evidence for AGN feedback in ...

... combining nebular emission and stellar absorption) and HeII-1640, and we also observe OIIII]-λ1663 (a blend of the λ1661–1666 doublet at the resolution of  ...

heii1640

Search for the HeII 1640 line signature of PopIII stars in az = 6.5 galaxy

20 Jun 2008 ... Theoretical models foresee that the first generation(s) of stars forming from primordial material should have a top-heavy IMF (e.g Schneider et ...

heii1640

(PDF) X-ray VS Heii ?1640 correlation of II Peg | Akif Esendemir ...

X - R A Y VS H e l I 2 1 6 4 0 ~, C O R R E L A T I O N OF II PEG A. E S E N D E M I R a n d H . M. A L E V Physics Department, Middle East Technical University, ...

heii1640

CLOUDY

and many others such as CIII]1909/HeII1640 or CIV1240/HeII vs NV1240/HeII,. NV1240/CIV1549, NV1240/NIII]1750, OIII]1661,1666/HeII, NIII]1750/HeII, ...

heii1640

The R136 star cluster dissected with Hubble Space Telescope/STIS ...

17 Mar 2019 ... The R136 star cluster dissected with Hubble Space Telescope/STIS. I. Far- ultraviolet spectroscopic census and the origin of HeII 1640 in young ...

heii1640

Characterizing the Circumgalactic Medium in Emission - heiDOK

5 Aug 2019 ... Targeting 13 LABs, I thus conduct a deep search for the HeII1640 and CIV1549 lines, which probe the volume density, the metallicity, and the ...

heii1640

Understanding Star Formation and AGN Activity at z~2-3

This spectrum shows many emission and absorption features, such as HI Lyman- alpha, NV1240, NIV]1483,1486, CIV1548,1550, HeII1640, and CIII]1907,1909.

heii1640

A photometric and spectroscopic comparison of the cataclysmic ...

... V1315 Aq1) shows similar continuum distributions (and implied mass accretion rates) but large differences in high excitation lines (HeII1640, 4686; CIV1550).

heii1640

Evidence for Pop III-like stellar populations in the most luminous ...

28 Jul 2019 ... We detect a narrow HeII1640$AA$ emission line ($6sigma$) which explains the excess seen in the $J$ band photometry (EW$_0$~80 AA).

heii1640

A Photometric and Spectroscopic Comparison of the Cataclysmic ...

... V1315 Aql) shows similar continuum distributions (and implied mass accretion rates) but large differences in high excitation lines (HeII1640,4686;CIV1550).

heii1640

Nebular HeII emission from spatially resolved metal-poor star ...

Nebular HeII1640,4686 emission, observed to be more frequent in high-z galaxies than locally, is indicative of far harder ionizing spectrum than that seen in ...

heii1640

Elemental abundances of high redshift quasars

dance on base of NV1240/CIV1549 and NV1240/HeII1640 line ratios. We estimated an abundance of Z ≃ 8Z⊙ of the line emit- ting gas given by NV/CIV and ...

heii1640

ANALOGS OF PRIMEVAL GALAXIES AT COSMIC NOON ...

Show faint absorptions and large EW nebular emission lines (CIII]1909, OIII]1666 , HeII1640 and CIV1550) rarely seen in more massive SFGs. (M*/M◉<~109.5).

heii1640

Detecting Pop. III Stars with HARMONI on the ELT

10−19. 10−18. 10−17. 10−16. 10−15. 10−14. F. [erg s−. 1 cm. −. 2 arcsec. −. 2. ] 103. 104. N. HeII1640. [electrons]. 1.796. 1.798. 1.800. 1.802. 1.804. 1.806 λ[µm].

heii1640

Exploring the nature of the Lyman-α emitter CR7 - Portsmouth ...

abstract = "CR7 is the brightest Lyman-α emitter observed at z > 6, which shows very strong Lyman-α and HeII 1640AA line luminosities, but no metal line ...

heii1640

The InfraRed Multi-Slit Spectrometer (IRMS)

23 Jul 2013 ... TMT/IRMS can detect HeII 1640 lines out to z~13, due to high spectral resolution, wavelength coverage and multiplexing capability of IRMS.

heii1640

ELECTRONIC NEWSLETTER OF THE EUVE OBSERVATORY

6 Jan 1998 ... The HeII 1640 A flux that we measure from the G8 star is consistent with predictions based on EUVE flux measurements. The decrease in the ...

heii1640

What is the Maximum Mass of a Population III Galaxy? | BibSonomy

We conclude that the bright HeII 1640 AA emission recently observed from the high-redshift galaxy CR7 cannot be explained by Pop III stars alone. However, in  ...

heii1640

PROBING DISTANT CLUSTERS USING RADIO GALAXIES

measured easily to high z. Important diagnostic of physical conditions. For z > 2, bright lines are: Lyα 1216. CIV 1549. HeII 1640. CIII] 1909. [OII] 3727. [OIII] 5007.

heii1640

Theme 2: science with the FLARE spectroscopic survey

[OIII]5007, to Hb, Ha. → Ha out to z~6 (z~8 for 6 micron). → [OIII],[OII], Hb to z~9 ( 11). Rest-frame UV lines: - Lya, HeII1640. - CIII]1909, CIV 1550. - OIII]1663.

heii1640

Photoionization models for extreme Lyα and HeII ratios in quasar ...

13 Sep 2019 ... HeII 1215.1/HeII 1640 = 0.33. Radio-loud type 2 quasar TXS 0211-122 (z=2.34) from Vernet et al. (2001). Lyα. NV. UV continuum polarization.

heii1640

spec_2014_BALrobust.csv

... 132,1,y,n,u,(original) BAL,11775, 138,1,y,n,n,BAL,2196, 148,2,y,n,y,LoBAL with higher-v CIV trough and very strong narrow HeII1640 emission,5226, 155,2, m ...

heii1640

Evidence for a direct collapse black hole in the Lyman α source CR7

The CR7 galaxy at z≈6.6 stands out for its combination of exceptionally bright Ly {alpha} and HeII 1640 Angstrom line emission but absence of metal lines.

heii1640

Emission Line Ratios

HeII1640, 1.349, 1.323, 1.170, 1.059. CIV1549, 1.2738, 1.249, 1.105. SIV/OIV 1402, 1.153, 1.131. NV1240, 1.0197. Ly&alpha1216, NV1240, SIV1402, CIV 1549 ...

heii1640

Abstract HTML

An average vblack of several lines is suggested instead but it is pointed out that v black of HeII 1640 usually reveals the highest observable wind velocity in ...

heii1640

Exploring HeII$λ$1640 emission line properties at ${zsim2-4}$ [GA ...

19 Feb 2019 ... Deep optical spectroscopic surveys of galaxies provide us a unique opportunity to investigate rest-frame ultra-violet (UV) emission line ...

heii1640

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