BORRBangladesh Open Research Repository
SearchSubmitAboutContact
BORRResearch for a Better Bangladesh.
AboutSubmit PaperContactTermsPolicyGitHub

© 2026 Bangladesh Open Research Repository.

Filters

Sort By

Sort by relevanceSort by dateSort by citations
Year Range
to

Results for “"Raghunath Ghara"”

2 results

Improved upper limits on the 21 cm signal power spectrum of neutral hydrogen at z ≈ 9.1 from LOFAR

Verified

Florent Mertens, M. Mevius, L. V. E. Koopmans, A. R. Offringa et al.

Journal: Monthly Notices of the Royal Astronomical SocietyYear: 2020Citations: 305

ABSTRACT A new upper limit on the 21 cm signal power spectrum at a redshift of z ≈ 9.1 is presented, based on 141 h of data obtained with the Low-Frequency Array (LOFAR). The analysis includes significant improvements in spectrally smooth gain-calibration, Gaussian Process Regression (GPR) foregroun...

Physical SciencesPhysics and AstronomyAstronomy and AstrophysicsOpen Access
Read Source

Constraining the intergalactic medium at z ≈ 9.1 using LOFAR Epoch of Reionization observations

Verified

Raghunath Ghara, Sambit K. Giri, Garrelt Mellema, B. Ciardi et al.

Journal: Monthly Notices of the Royal Astronomical SocietyYear: 2020Citations: 110

ABSTRACT We derive constraints on the thermal and ionization states of the intergalactic medium (IGM) at redshift ≈ 9.1 using new upper limits on the 21-cm power spectrum measured by the LOFAR radio telescope and a prior on the ionized fraction at that redshift estimated from recent cosmic microwave...

Physical SciencesPhysics and AstronomyAstronomy and AstrophysicsOpen Access
Read Source
PreviousPage 1 of 1Next