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researcher

J. A. Defreitaspacheco

46 papers hereh-index 191.1k citations98 works total

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

author position
  • sole author2
  • first author8
  • middle author11
  • last author21

Across the 42 of 46 papers where every author was matched, so the position is known.

fields
  • astro-ph21
  • astro-ph.CO10
  • gr-qc9
  • astro-ph.HE4
  • astro-ph.GA2

identity via Semantic Scholar / OpenAlex

activity
19942024
most citedHubble flow around Fornax cluster of galaxies

135 citations · 984 across the 46 of their papers we have counts for

collaborators
Showing 1995Show all

2 papers · 1 filter

astro-ph1995

The role of thermal instabilities on the theoretical mass function of MACHOs

E. M. de Gouveia Dal Pino, J. E. Horvath, J. A. de Freitas Pacheco

We analyze the primordial protogalactic gas to investigate the role of thermal instabilities in the formation of condensations that could contribute to the MACHO mass function. We…

astro-ph1995★ 59 cited

The Helium-Core Mass at the Helium Flash in Low-Mass Red Giant Stars: Observations and Theory

M. Catelan, J. A. de Freitas Pacheco, J. E. Horvath

The method developed by Raffelt (1990a,b,c) to estimate a possible increase in the standard values of the helium-core mass at the tip of the red giant branch, $\Mc$, from propertie…

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