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researcher

K. Helgason

19 papers hereh-index 14488 citations26 works total

Matching runs newest-first, so older work may not be attached to this profile yet.

author position
  • first author6
  • middle author7
  • last author3

Across the 16 of 19 papers where every author was matched, so the position is known.

fields
  • astro-ph.CO15
  • astro-ph.GA2
  • astro-ph.HE2

identity via Semantic Scholar / OpenAlex

activity
20122019
most citedA new measurement of the Hubble constant and matter content of the Universe using extragalactic background light γ-ray attenuation

90 citations · 577 across the 19 of their papers we have counts for

collaborators
Showing 2018Show all

3 papers · 1 filter

astro-ph.CO2018★ 20 cited

Probing the cross-power of unresolved cosmic infrared and X-ray backgrounds with upcoming space missions

A. Kashlinsky, R. G. Arendt, N. Cappelluti +4

The source-subtracted cosmic infrared background (CIB) fluctuations uncovered in deep Spitzer data cannot be explained by known galaxy populations and appear strongly coherent with…

astro-ph.GA2018★ 21 cited

The SPLASH and Chandra COSMOS Legacy Survey: the Cross Power Between Near-Infrared and X-Ray Background Fluctuations

Yanxia Li, Nico Cappelluti, Richard G. Arendt +3

We study the source-subtracted near-infrared and X-ray background fluctuations of the COSMOS field using data from the Spitzer SPLASH program (∼1272 hours) and Chandra COSMOS…

astro-ph.CO2018★ 20 cited

X-ray background and its correlation with the 21 cm signal

Q. Ma, B. Ciardi, M. B. Eide +1

We use high resolution hydrodynamical simulations to study the contribution to the X-ray background from high-z energetic sources, such as X-ray binaries, accreting nuclear black…

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