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researcher

J. Tammi

56 papers hereh-index 283.3k citations114 works total

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

author position
  • sole author1
  • first author4
  • middle author24
  • last author3

Across the 32 of 56 papers where every author was matched, so the position is known.

fields
  • astro-ph.HE39
  • astro-ph.GA7
  • astro-ph5
  • astro-ph.CO4
  • astro-ph.SR1
same name
  • J. Tammi — 3 papers

Either other researchers who publish under this name, or the same person where the external sources have not merged their records.

identity via Semantic Scholar / OpenAlex

activity
20062026
most citedKinematics of Parsec-Scale Jets of Gamma-Ray Blazars at 43~GHz within the VLBA-BU-BLAZAR Program

365 citations · 3.4k across the 56 of their papers we have counts for

collaborators
Showing 2007Show all

3 papers · 1 filter

astro-ph2007

Hard particle spectra from parallel shocks due to turbulence transmission

Joni Tammi

If taken into account, the transmission of the particle-scattering turbulence --in addition to just the particles-- through the shock front can change the effective compression rat…

astro-ph2007★ 2 cited

Particle acceleration by multiple parallel shocks

Joni Tammi, Paul Dempsey

We present both numerical and semi-analytical results on test-particle acceleration in multiple parallel shocks. We apply a kinetic Monte Carlo code and an eigenfunction expansion…

astro-ph2007★ 23 cited

Synchrotron flaring behaviour of CygnusX-3 during the February-March 1994 and September 2001 outbursts

E. J. Lindfors, M. Türler, D. C. Hannikainen +4

Aims: In this paper we study whether the shock-in-jet model, widely used to explain the outbursting behaviour of quasars, can be used to explain the radio flaring behaviour of the…

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Not affiliated with arXiv. Researcher data from Semantic Scholar (ODC-BY) and OpenAlex.