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researcher

J. Penna

12 papers hereh-index 10305 citations53 works total

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

author position
  • middle author9
  • last author1

Across the 10 of 12 papers where every author was matched, so the position is known.

fields
  • astro-ph.SR7
  • astro-ph.IM4
  • astro-ph.CO1
same name
  • J. Penna — 2 papers, h 2

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
20092018
most citedParallaxes of Southern Extremely Cool objects (PARSEC) II: Spectroscopic Follow-up and Parallaxes of 52 Targets

68 citations · 268 across the 12 of their papers we have counts for

collaborators
Showing 2012Show all

2 papers · 1 filter

astro-ph.SR2012

Development and first year of results from the heliometer of Observatorio Nacional

Alexandre H. Andrei, Victor A. D'Avila, Eugenio Reis Neto +5

Recent research on global climate changes points to three distinct sources of climate disturbance: anthropogenic; natural changes in the oceans and atmosphere; and irregularities i…

astro-ph.IM2012

A new approach for the heliometric optics

Victor d'Avila, Eugenio Reis Neto, Alissandro Coletti +6

The heliometer of Fraunhofer in Koenigsberg (1824) is a refractor in which the lens is split into two halves to which is applied a linear displacement along the cut. Later in 1890s…

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