Augustine A. Ubachukwu

University of Nigeria

Publishing since 1993, latest 2024

Astronomy and Astrophysics
Nuclear and High Energy Physics
Instrumentation
Aerospace Engineering
Applied Mathematics
Geophysics

Their record on OpenAlex

Publications: 481993–2024
Citations: 395to those papers
h-index: 10i10-index 14
Field-weighted impact: 0.631.00 is the world average
World top 10%: 6%3 of 48 scored papers
Open access: 35%17 papers free to read

3 other works — preprints, datasets and the like — are listed but not counted.

By year

Papers, and the citations to them

Publications, left axisCitations to that year’s papers, right axis2026 still in progress

Career

On their papers

Publications

48 in all

On the Extended Blazar Sequence for γ-Ray Emitting Active Galactic Nuclei
2024AstrophysicsBook chapterSenior author0 citations10.1007/s10511-025-09843-8
Principal Component Analysis of Ground Level Enhancement of Cosmic Ray Events
2023Research in Astronomy and AstrophysicsJournalOpen access

Download CV:PDFWord

Citations received each year

Peerford

To all their work, old papers included. Google Scholar also counts citations from theses, books and web pages, so its line runs higher.

What they work on

From the classification of each paper

Subfields

Astronomy and Astrophysics4390%
Nuclear and High Energy Physics2756%
Instrumentation613%
Aerospace Engineering48%
Applied Mathematics36%
Geophysics36%
Computational Mechanics24%
Statistical and Nonlinear Physics24%
Atmospheric Science12%
Atomic and Molecular Physics, and Optics12%

Physical Sciences

Topics most written on

Radio Astronomy Observations and Technology30
Astrophysics and Cosmic Phenomena27
Galaxies: Formation, Evolution, Phenomena23
Astronomy and Astrophysical Research6
Dark Matter and Cosmic Phenomena5
Cosmology and Gravitation Theories4
Astrophysics and Star Formation Studies3
Neutrino Physics Research3
Solar and Space Plasma Dynamics3
Astronomical Observations and Instrumentation2
Earthquake Detection and Analysis2
Gamma-ray bursts and supernovae2

Who they write with

Their most frequent co-authors, and the papers those co-authors share

Where their co-authors are

25% of their papers have a co-author abroad

papers co-written1234678Home

Most frequent partner countries

South Africa9
Japan2
Australia2
Italy2
Netherlands1

Papers with at least one author in that country.

Institutions written with most

Chukwuemeka Odumegwu Ojukwu UniversityNG10 papers
Hartebeesthoek Radio Astronomy ObservatoryZA7 papers
Federal University of Technology OwerriNG6 papers
Ebonyi State UniversityNG3 papers
Abia State UniversityNG3 papers
Commonwealth Scientific and Industrial Research OrganisationAU2 papers
Kagoshima UniversityJP2 papers
National Astronomical Observatory of JapanJP2 papers
The Abdus Salam International Centre for Theoretical Physics (ICTP)IT2 papers
Hassan Usman Katsina PolytechnicNG2 papers

Where they publish

Astrophysics and Space Science17
Australian Journal of Physics5
Journal of Astrophysics and Astronomy5
Monthly Notices of the Royal Astronomical Society3
Research in Astronomy and Astrophysics3
AIP conference proceedings2

Development goals addressed

From each paper’s title and abstract

13Climate action7
7Affordable and clean energy4
11Sustainable cities and communities1
14Life below water1

Most cited

Impact of particle size and surface defects on antibacterial and photocatalytic activities of undoped and Mg-doped ZnO nanoparticles, biosynthesized using one-step simple process
Vacuum7
2021128 citationsWorld top 10%
Astrometry and expanding bubble of a deeply embedded young stellar object in M17
Monthly Notices of the Royal Astronomical Society
201622 citationsOpen access · Bronze
On the relativistic beaming and orientation effects in core-dominated quasars

Every institution they have given on a paper.

Spectral Properties of Fermi Blazars and their Unification Schemes

2020Open AstronomyJournalOpen accessSenior author6 citations10.1515/astro-2020-0015

SELECTION EFFECTS AND STRUCTURAL SYMMETRIES IN THE ORIENTATION BASED UNIFIED SCHEME

2019Revista Mexicana de Astronomía y AstrofísicaJournalOpen accessSenior author1 citation10.22201/ia.01851101p.2019.55.01.11

On the unified scheme for high-excitation galaxies and quasars in 3CRR sample

2019Journal of Astrophysics and AstronomyJournalSenior author0 citations10.1007/s12036-018-9572-z

Evolution of Extragalactic Radio Sources and Quasar/Galaxy Unification

2018Redalyc (Universidad Autónoma del Estado de México)Journal3 citations

Bow shocks in a newly discovered maser source in IRAS 20231+3440

2017Monthly Notices of the Royal Astronomical SocietyJournalOpen access4 citations10.1093/mnras/stx1154

Astrometry and expanding bubble of a deeply embedded young stellar object in M17

2016Monthly Notices of the Royal Astronomical SocietyJournalOpen access22 citations10.1093/mnras/stw1019

Kinematic model for asymmetry: projected hotspot/lobe advance speed

2014Redalyc (Universidad Autónoma del Estado de México)Journal2 citations

Doppler factor, Lorentz factor and viewing angle of superluminal quasars

2013Astrophysics and Space ScienceJournalSenior author7 citations10.1007/s10509-013-1549-4

On the Lorentz factor of superluminal sources

2013Research in Astronomy and AstrophysicsJournalOpen accessSenior author0 citations10.1088/1674-4527/13/5/002

Periodicities in rotation and DM of PSR B1557–50

2003Astronomy and AstrophysicsJournalOpen access12 citations10.1051/0004-6361:20021651

On the relativistic beaming and orientation effects in core-dominated quasars

2002Journal of Astrophysics and AstronomyJournalOpen accessFirst author20 citations10.1007/bf02702285

Statistical Tests of the Unification Scheme for High Luminosity Double Radio Sources

2002Astrophysics and Space ScienceJournalFirst authorCorresponding9 citations10.1023/a:1015149502196

On the Asymmetries in Powerful Extragalactic Radio Sources

2002Astrophysics and Space ScienceJournalFirst author3 citations10.1023/a:1015814206837

Dependence of Faraday Effects on Radio Luminosity and Redshift

1999Australian Journal of PhysicsJournalOpen accessFirst author1 citation10.1071/p98004

Luminosity Selection Effects and Linear Size Evolution in the Quasar/Galaxy Unification Scheme

1998Australian Journal of PhysicsJournalOpen accessFirst author10 citations10.1071/p97012

Implications of a Nonzero Cosmological Constant and Luminosity Selection Effects on Cosmological Tests

1998Australian Journal of PhysicsJournalOpen accessFirst authorCorresponding3 citations10.1071/p97097

Linear Size Evolution and Luminosity Selection Effects in Quasars

1997Australian Journal of PhysicsJournalOpen accessFirst authorCorresponding1 citation10.1071/p96083

Selection effects in the observed variation of spectral index with redshift

1996Astrophysics and Space ScienceJournalFirst author3 citations10.1007/bf00641685

The angular size-redshift relation and the unified scheme for radio-loud quasars

1996Astrophysics and Space ScienceJournalFirst authorCorresponding2 citations10.1007/bf00645141

The radio luminosity-linear size relation as a test of the quasar/galaxy unification scheme

1995AIP conference proceedingsPublicationFirst authorCorresponding0 citations10.1063/1.47000

Basic space science education in Nigeria

1995AIP conference proceedingsPublication0 citations10.1063/1.47002

Redalyc (Universidad Autónoma del Estado de México)2

How it can be read

35% free to read

Diamond 2 · 4%Free to read and to publish
Gold 1 · 2%In an open-access journal
Hybrid 2 · 4%Open in a subscription journal
Bronze 9 · 19%Free to read, no open licence
Green 3 · 6%A copy in a repository
Closed 31 · 65%Behind a paywall

Who funds it

9 of 48 papers name a funder

Styrelsen för Internationellt Utvecklingssamarbete3
University Of Nigeria Nsukka3
California Institute of Technology2
Australian Government1
Jet Propulsion Laboratory1
National Aeronautics and Space Administration1
North-West University1

Journal of Astrophysics and Astronomy

200220 citationsOpen access · Green

Relativistic Beaming and Orientation Effects in BL Lacertae Objects

Journal of Astrophysics and Astronomy

201214 citations