R. I. Kollgaard

1.4k total citations
27 papers, 724 citations indexed

About

R. I. Kollgaard is a scholar working on Nuclear and High Energy Physics, Astronomy and Astrophysics and Electrical and Electronic Engineering. According to data from OpenAlex, R. I. Kollgaard has authored 27 papers receiving a total of 724 indexed citations (citations by other indexed papers that have themselves been cited), including 23 papers in Nuclear and High Energy Physics, 18 papers in Astronomy and Astrophysics and 8 papers in Electrical and Electronic Engineering. Recurrent topics in R. I. Kollgaard's work include Astrophysics and Cosmic Phenomena (22 papers), Radio Astronomy Observations and Technology (15 papers) and Particle Accelerators and Free-Electron Lasers (8 papers). R. I. Kollgaard is often cited by papers focused on Astrophysics and Cosmic Phenomena (22 papers), Radio Astronomy Observations and Technology (15 papers) and Particle Accelerators and Free-Electron Lasers (8 papers). R. I. Kollgaard collaborates with scholars based in United States, Germany and Russia. R. I. Kollgaard's co-authors include Eric D. Feigelson, S. A. Laurent‐Muehleisen, D. C. Gabuzda, J. F. C. Wardle, W. Brinkmann, D. H. Roberts, J. Siebert, E. B. Fomalont, C. M. Urry and R. M. Sambruna and has published in prestigious journals such as The Astrophysical Journal, Monthly Notices of the Royal Astronomical Society and The Astrophysical Journal Supplement Series.

In The Last Decade

R. I. Kollgaard

26 papers receiving 707 citations

Peers

R. I. Kollgaard

NHEP

EEE

INSTR

H. Kuehr Germany

T. Sbarrato Italy

J. Tammi Finland

O. M. Kurtanidze Georgia

J. Dennett-Thorpe Netherlands

Anna Bonaldi United Kingdom

L. Ostorero Italy

M. Lainela Finland

V. A. Hagen‐Thorn Russia

Gopal Bhatta Poland

H. Kuehr Germany

R. I. Kollgaard

522 ×0.8

512 ×0.8

NHEP

27 ×0.7

EEE

15 ×0.5

INSTR

37 ×1.8

Citations per year, relative to R. I. Kollgaard R. I. Kollgaard (= 1×) peers H. Kuehr

Countries citing papers authored by R. I. Kollgaard

Since Specialization

Citations

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

Fields of papers citing papers by R. I. Kollgaard

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by R. I. Kollgaard. 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 R. I. Kollgaard. The network helps show where R. I. Kollgaard may publish in the future.

Co-authorship network of co-authors of R. I. Kollgaard

This figure shows the co-authorship network connecting the top 25 collaborators of R. I. Kollgaard. A scholar is included among the top collaborators of R. I. Kollgaard 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 R. I. Kollgaard. R. I. Kollgaard is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Gabuzda, D. C., et al.. (2000). Intraday polarization variability outside the VLBI core of the active galactic nucleus 07161714. Monthly Notices of the Royal Astronomical Society. 313(3). 627–636. 16 indexed citations

Sambruna, R. M., G. Ghisellini, E. J. Hooper, et al.. (1999). ASCAand Contemporaneous Ground‐based Observations of the BL Lacertae Objects 1749+096 and 2200+420 (BL Lac). The Astrophysical Journal. 515(1). 140–152. 27 indexed citations

Laurent‐Muehleisen, S. A., R. I. Kollgaard, & Eric D. Feigelson. (1998). The Rosat-Green Bank Sample of Intermediate BL Lac Objects. International Astronomical Union Colloquium. 164. 163–164. 1 indexed citations

Laurent‐Muehleisen, S. A., R. I. Kollgaard, Patrick J. Ryan, et al.. (1997). Radio-loud active galaxies in the northern ROSAT All-SkySurvey. Springer Link (Chiba Institute of Technology). 58 indexed citations

Brinkmann, W., J. Siebert, Eric D. Feigelson, et al.. (1997). RADIO-LOUD ACTIVE GALAXIES IN THE NORTHERN ROSAT ALL-SKY SURVEY : II. MULTI-FREQUENCY PROPERTIES OF UNIDENTIFIED SOURCES. 323(3). 739–748. 3 indexed citations

Kollgaard, R. I., Christopher Palma, S. A. Laurent‐Muehleisen, & Eric D. Feigelson. (1996). Radio Constraints on Relativistic Beaming Models of BL Lacertae Objects. The Astrophysical Journal. 465. 115–115. 39 indexed citations

Urry, C. M., R. M. Sambruna, D. M. Worrall, et al.. (1996). Soft X-Ray Properties of a Complete Sample of Radio-selected BL Lacertae Objects. The Astrophysical Journal. 463. 424–424. 65 indexed citations

Kollgaard, R. I., D. C. Gabuzda, & Eric D. Feigelson. (1996). Parsec-Scale Radio Structure of Four X-Ray--selected BL Lacertae Objects. The Astrophysical Journal. 460. 174–174. 18 indexed citations

Kollgaard, R. I., et al.. (1996). BL Lacertae objects in the ROSAT All-Sky Survey: new objects and comparison of different search techniques.. 309(2). 419–430. 4 indexed citations

10.

Brinkmann, W., J. Siebert, R. I. Kollgaard, & H. C. Thomas. (1996). Are there two types of BL Lacertae objects. 313(2). 356–362. 2 indexed citations

11.

Kollgaard, R. I., S. A. Laurent‐Muehleisen, Eric D. Feigelson, & Christopher Palma. (1995). Constraints on Relativistic Beaming Models of BL Lacs. American Astronomical Society Meeting Abstracts. 187.

12.

Kollgaard, R. I., Eric D. Feigelson, S. A. Laurent‐Muehleisen, et al.. (1995). A Search for Optically Quiet Quasars. The Astrophysical Journal. 449. 61–61. 13 indexed citations

13.

Courvoisier, T. J.-L., A. Blécha, M. T. Carini, et al.. (1995). Multiwavelength monitoring of the BL Lacertae object PKS 2155-304. 3: Ground-based observations in 1991 November. The Astrophysical Journal. 438. 108–108. 18 indexed citations

14.

Kollgaard, R. I.. (1994). Relativistic jets and the nature of BL Lacertae objects. Vistas in Astronomy. 38. 29–75. 36 indexed citations

15.

Kollgaard, R. I., W. Brinkmann, M. M. Chester, et al.. (1994). A sensitive 1.5 GHz radio survey around the north ecliptic pole. The Astrophysical Journal Supplement Series. 93. 145–145. 22 indexed citations

16.

Gabuzda, D. C., R. I. Kollgaard, D. H. Roberts, & J. F. C. Wardle. (1993). Is 1308+326 A BL Lacertae object or a quasar?. The Astrophysical Journal. 410. 39–39. 20 indexed citations

17.

Laurent‐Muehleisen, S. A., R. I. Kollgaard, G. Moellenbrock, & Eric D. Feigelson. (1993). Radio morphology and parent population of X-ray selected BL Lacertae objects. The Astronomical Journal. 106. 875–875. 47 indexed citations

18.

Kollgaard, R. I., J. F. C. Wardle, D. H. Roberts, & D. C. Gabuzda. (1992). Radio constraints on the nature of BL Lacertae objects and their parent population. The Astronomical Journal. 104. 1687–1687. 74 indexed citations

19.

Roberts, D. H., R. I. Kollgaard, L. F. Brown, D. C. Gabuzda, & J. F. C. Wardle. (1990). Milliarcsecond polarization structure of the superluminal quasar 3C 273. The Astrophysical Journal. 360. 408–408. 8 indexed citations

20.

Kollgaard, R. I., J. F. C. Wardle, & D. H. Roberts. (1990). High dynamic range VLA observations of eight core-dominated quasars. The Astronomical Journal. 100. 1057–1057. 17 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.

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