J. Harju

1.9k total citations
61 papers, 938 citations indexed

About

J. Harju is a scholar working on Astronomy and Astrophysics, Spectroscopy and Atmospheric Science. According to data from OpenAlex, J. Harju has authored 61 papers receiving a total of 938 indexed citations (citations by other indexed papers that have themselves been cited), including 59 papers in Astronomy and Astrophysics, 29 papers in Spectroscopy and 13 papers in Atmospheric Science. Recurrent topics in J. Harju's work include Astrophysics and Star Formation Studies (55 papers), Stellar, planetary, and galactic studies (35 papers) and Molecular Spectroscopy and Structure (25 papers). J. Harju is often cited by papers focused on Astrophysics and Star Formation Studies (55 papers), Stellar, planetary, and galactic studies (35 papers) and Molecular Spectroscopy and Structure (25 papers). J. Harju collaborates with scholars based in Finland, Germany and France. J. Harju's co-authors include P. Caselli, O. Sipilä, M. Juvela, L. K. Haikala, K. Lehtinen, Stephan Śchlemmer, O. Miettinen, L. Bizzocchi, K. Mattila and И. И. Зинченко and has published in prestigious journals such as Nature, The Astrophysical Journal and Astronomy and Astrophysics.

In The Last Decade

J. Harju

58 papers receiving 894 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
J. Harju Finland	20	850	526	324	171	30	61	938
O. Sipilä Germany	21	879 1.0×	632 1.2×	418 1.3×	230 1.3×	21 0.7×	56	1.0k
D. S. Wiebe Russia	18	963 1.1×	436 0.8×	196 0.6×	145 0.8×	20 0.7×	83	1.0k
B. Mookerjea India	17	824 1.0×	315 0.6×	180 0.6×	119 0.7×	40 1.3×	57	887
Benoît Tabone France	19	1.0k 1.2×	504 1.0×	264 0.8×	142 0.8×	22 0.7×	53	1.1k
Luis A. Zapata Mexico	24	1.5k 1.8×	713 1.4×	314 1.0×	106 0.6×	56 1.9×	94	1.6k
Munetake Momose Japan	23	1.5k 1.8×	607 1.2×	201 0.6×	66 0.4×	22 0.7×	61	1.6k
Tomofumi Umemoto Japan	16	919 1.1×	404 0.8×	190 0.6×	60 0.4×	37 1.2×	47	933
Ian Stephens United States	21	1.2k 1.4×	378 0.7×	200 0.6×	86 0.5×	25 0.8×	56	1.2k
M. Röllig Germany	19	932 1.1×	383 0.7×	286 0.9×	136 0.8×	28 0.9×	50	1.0k
U. A. Yíldíz Germany	19	871 1.0×	570 1.1×	304 0.9×	140 0.8×	15 0.5×	22	927

Countries citing papers authored by J. Harju

Since Specialization

Citations

This map shows the geographic impact of J. Harju'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 J. Harju with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites J. Harju more than expected).

Fields of papers citing papers by J. Harju

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by J. Harju. 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 J. Harju. The network helps show where J. Harju may publish in the future.

Co-authorship network of co-authors of J. Harju

This figure shows the co-authorship network connecting the top 25 collaborators of J. Harju. A scholar is included among the top collaborators of J. Harju based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with J. Harju. J. Harju is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Redaelli, E., O. Sipilä, J. Harju, et al.. (2025). Hunting pre-stellar cores with APEX IRAS16293E (Oph464). Astronomy and Astrophysics. 694. A27–A27. 5 indexed citations

Redaelli, E., S. Spezzano, P. Caselli, et al.. (2025). Hunting pre-stellar cores with APEX: Corona Australis 151, the densest pre-stellar core or the youngest protostar?. Astronomy and Astrophysics. 696. A171–A171. 1 indexed citations

Harju, J., P. Caselli, O. Sipilä, et al.. (2025). Statistical nuclear spin ratios of deuterated ammonia in the pre-stellar core L1544. Astronomy and Astrophysics. 700. A141–A141.

Harju, J., C. Vastel, O. Sipilä, et al.. (2024). A low cosmic-ray ionisation rate in the pre-stellar core Ophiuchus/H-MM1. Astronomy and Astrophysics. 688. A117–A117. 2 indexed citations

Lin, Yiguang, S. Spezzano, J. E. Pineda, et al.. (2023). Initial conditions of star formation at ≲2000 au: Physical structure and NH₃ depletion of three early-stage cores. Astronomy and Astrophysics. 680. A43–A43. 3 indexed citations

Punanova, A., A. I. Vasyunin, P. Caselli, et al.. (2022). Methanol Mapping in Cold Cores: Testing Model Predictions*. The Astrophysical Journal. 927(2). 213–213. 14 indexed citations

Pineda, J. E., J. Harju, P. Caselli, et al.. (2022). An Interferometric View of H-MM1. I. Direct Observation of NH₃ Depletion. The Astronomical Journal. 163(6). 294–294. 25 indexed citations

Myers, Philip C., et al.. (2019). Magnetic Field Structure of Dense Cores Using Spectroscopic Methods. The Astrophysical Journal. 872(2). 207–207. 6 indexed citations

Chacón-Tanarro, A., J. E. Pineda, P. Caselli, et al.. (2019). Dust opacity variations in the pre-stellar core L1544. Springer Link (Chiba Institute of Technology). 21 indexed citations

10.

Chacón-Tanarro, A., P. Caselli, L. Bizzocchi, et al.. (2017). Search for grain growth toward the center of L1544. Springer Link (Chiba Institute of Technology). 14 indexed citations

11.

Harju, J., F. Daniel, O. Sipilä, et al.. (2017). Deuteration of ammonia in the starless core Ophiuchus/H-MM1. Astronomy and Astrophysics. 600. A61–A61. 34 indexed citations

12.

Bizzocchi, L., et al.. (2016). Chemical differentiation in a prestellar core traces non-uniform illumination. Springer Link (Chiba Institute of Technology). 19 indexed citations

13.

Juvela, M., et al.. (2015). The physical state of selected cold clumps. Springer Link (Chiba Institute of Technology). 9 indexed citations

14.

Brünken, Sandra, O. Sipilä, E. T. Chambers, et al.. (2014). H2D+ observations give an age of at least one million years for a cloud core forming Sun-like stars. Nature. 516(7530). 219–221. 82 indexed citations

15.

Harju, J., et al.. (2011). Mapping the prestellar core Ophiuchus D (L1696A) in ammonia. Springer Link (Chiba Institute of Technology). 5 indexed citations

16.

Geppert, W. D., J. Harju, M. Juvela, et al.. (2011). CH abundance gradient in TMC-1. Springer Link (Chiba Institute of Technology). 13 indexed citations

17.

Miettinen, O., J. Harju, L. K. Haikala, & M. Juvela. (2010). Physical properties of dense cores in Orion B9. Springer Link (Chiba Institute of Technology). 6 indexed citations

18.

Harju, J., M. Juvela, Stephan Śchlemmer, et al.. (2008). Detection of 6 K gas in Ophiuchus D. Springer Link (Chiba Institute of Technology). 15 indexed citations

19.

Kainulainen, J., K. Lehtinen, & J. Harju. (2006). The ratio ofN(C$\mathsf{^{18}}$O) andA$\mathsf{_{V}}$ in Chamaeleon I and III-B. Astronomy and Astrophysics. 447(2). 597–607. 20 indexed citations

20.

Lehtinen, K. & J. Harju. (2003). Centimeter wavelength continuum observations of young stellar objects\n in the dark cloud DC 303.8–14.2. Springer Link (Chiba Institute of Technology). 4 indexed citations

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.

Explore authors with similar magnitude of impact