A. Helmi

42.8k citations

162 papers · 8.1k indexed · 5 hit papers · h-index 47

Instrumentation top 0.1%
- Astronomy and Astrophysical Research 90
Astronomy and Astrophysics top 0.1%
- Stellar, planetary, and galactic studies 115
- Galaxies: Formation, Evolution, Phenomena 73
- Astrophysics and Star Formation Studies 47
- Gamma-ray bursts and supernovae 34
- Cosmology and Gravitation Theories 18
- Astro and Planetary Science 11
Nuclear and High Energy Physics top 1%
- Dark Matter and Cosmic Phenomena 8
Statistical and Nonlinear Physics top 2%
Acoustics and Ultrasonics

Co-authors: Volker Springel Julio F. Navarro Carlos S. Frenk Simon D. M. White Adrian Jenkins Aaron D. Ludlow Mark VogelsbergerJie Wang
Cited by: Instrumentation Astronomy and Astrophysics Nuclear and High Energy Physics
Journals: Astronomy and Astrophysics (38 papers)Monthly Notices of the Royal Astronomical Society (32 papers)The Astrophysical Journal (12 papers)
Partner nations: Netherlands Germany United States

In The Last Decade

A. Helmi

149 papers receiving 7.8k citations

Hit Papers

5 papers align trajectories log scale

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

2020 Annual Review of Astronomy and Astrophysics
2019 Springer Link (Chiba Institute of Technology)
2018 Nature
2009 Monthly Notices of the Royal Astronomical Society
2008 Monthly Notices of the Royal Astronomical Society

Peers

Countries citing papers authored by A. Helmi

Since Specialization

Citations

This map shows the geographic impact of A. Helmi's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by A. Helmi with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites A. Helmi more than expected).

Fields of papers citing papers by A. Helmi

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by A. Helmi. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by A. Helmi. The network helps show where A. Helmi may publish in the future.

Co-authorship network

The 25 scholars most cited alongside A. Helmi, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with A. Helmi Line = papers co-authored together A. Helmi links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	A Pristine-UNIONS view on the Galaxy: Kinematics of the distant spur feature of the Sagittarius stream traced by blue horizontal branch stars Astronomy and Astrophysics ·Лідія Товкун,Else Starkenburg,Guillaume F. Thomas,Nicolas F. Martin,A. Helmi,张国伟,Thomas de Boer,Emma Fernández-Alvar,Stephen Gwyn,Rodrigo Ibata,P. Jablonka,Linet Okoth,Tadafumi Matsuno,Alan W. McConnachie,G. E. Medina,Zachary N Howard,Rubén Sánchez-Janssen,Federico Sestito,Anand Viswanathan	2025	3
2	Assessing the robustness of the Galactic rotation curve inferred from the Jeans equations using Gaia DR3 and cosmological simulations Astronomy and Astrophysics ·أحمد جري شبيب,T. Antoja,A. Helmi,B. Van Haute,Chervin F. P. Laporte	2024	6
3	A 3D view of dwarf galaxies with Gaia and VLT/FLAMES Astronomy and Astrophysics ·Eline Tolstoy,Á. Skúladóttir,G. Battaglia,A. G. A. Brown,D. Massari,Michael J. Irwin,Else Starkenburg,Stefania Salvadori,V. Hill,P. Jablonka,M. Salaris,Jin-Yu Tan,津田加奈子,A. Helmi,David Ekoué Dosseh	2023	16
4	Age determination of galaxy merger remnant stars using asteroseismology Monthly Notices of the Royal Astronomical Society ·Huang Bao,(unknown),A. Helmi,Helmer H. Koppelman,M. B. Nielsen,Jakob Rørsted Mosumgaard,Dennis Stello,Amalie Stokholm,Mark Lykke Winther,G. R. Davies,Marc Hon,J. M. Diederik Kruijssen,Chervin F. P. Laporte,A. Ickler,Jie Yu	2022	16
5	Frequencies, chaos, and resonances: A study of orbital parameters of nearby thick-disc and halo stars Springer Link (Chiba Institute of Technology) ·Helmer H. Koppelman,Hiroyoshi Oka,A. Helmi	2021	8
6	The reduced proper motion selected halo: Methods and description of the catalogue Springer Link (Chiba Institute of Technology) ·Helmer H. Koppelman,A. Helmi	2021	8
7	Heavy-elements heritage of the falling sky Springer Link (Chiba Institute of Technology) ·A. Recio–Blanco,Emma Fernández-Alvar,P. de Laverny,T. Antoja,A. Helmi,A. Crida	2021	7
8	Time evolution of gaps in stellar streams in axisymmetric Stäckel potentials Springer Link (Chiba Institute of Technology) ·Helmer H. Koppelman,A. Helmi	2021	5
9	Determination of the escape velocity of the Milky Way using a halo sample selected based on proper motion Springer Link (Chiba Institute of Technology) ·Helmer H. Koppelman,A. Helmi	2021	1
10	Zero-metallicity Hypernova Uncovered by an Ultra-metal-poor Star in the Sculptor Dwarf Spheroidal Galaxy* The Astrophysical Journal Letters ·Á. Skúladóttir,Stefania Salvadori,A. M. Amarsi,Eline Tolstoy,M. J. Irwin,V. Hill,P. Jablonka,G. Battaglia,Else Starkenburg,D. Massari,A. Helmi,Lorenzo Posti	2021	42
11	The chemical evolution of the dwarf spheroidal galaxy Sextans Springer Link (Chiba Institute of Technology) ·P. Asawawongsawat,P. Jablonka,Nemanja Dačević,C. Lardo,P. North,M. J. Irwin,G. Battaglia,V. Hill,Eline Tolstoy,Kim A. Venn,A. Helmi,A. Kaufer,F. Primas,Matthew Shetrone	2020	21
12	Stellar 3D kinematics in the Draco dwarf spheroidal galaxy Springer Link (Chiba Institute of Technology) ·D. Massari,A. Helmi,A. Mucciarelli,Laura V. Sales,L. Spina,Eline Tolstoy	2020	31
13	Origin of the system of globular clusters in the Milky Waybreakdown → Springer Link (Chiba Institute of Technology) ·D. Massari,Helmer H. Koppelman,A. Helmi	2019	271
14	Behaviour of streams in angle and frequency spaces in different potentials Springer Link (Chiba Institute of Technology) ·J. Zasadziński,A. Helmi	2017	2
15	White dwarfs in the building blocks of the Galactic spheroid Springer Link (Chiba Institute of Technology) ·Pim van der Harst,G. Nelemans,Else Starkenburg,Silvia Toonen,A. Helmi,Simon Portegies Zwart	2017	1
16	The early days of the Sculptor dwarf spheroidal galaxy Springer Link (Chiba Institute of Technology) ·P. Jablonka,P. North,L. Mashonkina,V. Hill,Yves Revaz,Matthew Shetrone,Else Starkenburg,M. J. Irwin,Eline Tolstoy,G. Battaglia,Kim A. Venn,A. Helmi,F. Primas,P. François	2015	56
17	Binary white dwarfs in the halo of the Milky Way Springer Link (Chiba Institute of Technology) ·Pim van der Harst,G. Nelemans,Silvia Toonen,Onno R. Pols,A. G. A. Brown,A. Helmi,Simon Portegies Zwart	2014	9
18	An analytic distribution function for a mass-less cored stellar system in a cuspy dark-matter halo Springer Link (Chiba Institute of Technology) ·Maarten A. Breddels,A. Helmi	2013	1
19	Model comparison of the dark matter profiles of Fornax, Sculptor, Carina and Sextans Springer Link (Chiba Institute of Technology) ·Maarten A. Breddels,A. Helmi	2013	56
20	Chemical composition of extremely metal-poor stars in the Sextans dwarf spheroidal galaxy Springer Link (Chiba Institute of Technology) ·Wako Aoki,N. Arimoto,Kunihiko Sadakane,Eline Tolstoy,G. Battaglia,P. Jablonka,Matthew Shetrone,B. Letarte,Michael J. Irwin,V. Hill,P. François,Kim A. Venn,F. Primas,A. Helmi,A. Kaufer,M. Tafelmeyer,T. Szeifert,刘栗	2009	61

About A. Helmi

A. Helmi is a scholar working on Instrumentation, Astronomy and Astrophysics, Nuclear and High Energy Physics, Statistical and Nonlinear Physics and Oceanography, having authored 162 papers that have together received 8.1k indexed citations. Recurring topics across this work include Stellar, planetary, and galactic studies (115 papers), Astronomy and Astrophysical Research (90 papers), Galaxies: Formation, Evolution, Phenomena (73 papers), Astrophysics and Star Formation Studies (47 papers), Gamma-ray bursts and supernovae (34 papers), Cosmology and Gravitation Theories (18 papers), Astro and Planetary Science (11 papers) and Dark Matter and Cosmic Phenomena (8 papers). The work is most often cited by research in Instrumentation (3.5k citations), Astronomy and Astrophysics (7.7k citations), Nuclear and High Energy Physics (1.6k citations), Statistical and Nonlinear Physics (368 citations) and Acoustics and Ultrasonics (9 citations). A. Helmi has collaborated with scholars based in Netherlands, Germany and United States. Frequent co-authors include Volker Springel, Julio F. Navarro, Carlos S. Frenk, Simon D. M. White, Adrian Jenkins, Aaron D. Ludlow, Mark Vogelsberger, Jie Wang, Helmer H. Koppelman and S. D. M. White. Their work appears in journals such as Astronomy and Astrophysics, Monthly Notices of the Royal Astronomical Society, The Astrophysical Journal, The Astrophysical Journal Letters and Nature.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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