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G

G. M. Harper

University of Colorado Boulder

27H-index
256Paper Count
2.0KCitation Count
Published Papers 60
Publication Date
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HST-STIS Spectra of Antares (α Scorpii: M1.5 Iab)—Type II Supernova Progenitor and Betelgeuse’s Chromospheric Twin
errThe Astrophysical Journal
IF0
err2026-04-27
err0
errOAAI
errGraham M. Harper; Thomas R. Ayres; Keiichi Ohnaka; Edward F. Guinan; Curtis DeWitt
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The Discovery of 25 μm Interstellar Methanol
errastrophysical journal letters
IF0
err2025-08-20
err0
PREAI
errSarah L. Nickerson; Naseem Rangwala; Keeyoon Sung; Xinchuan Huang; Edward J. Montiel; Curtis DeWitt; Valentin J. M. Le Gouellec; Sean W. J. Colgan; Jason Dittmann; José Pablo Fonfría; Graham M. Harper; Kathleen E. Kraemer; Jialu Li; Conor A. Nixon; Maisie Frances Rashman; Clara Sousa-Silva; Alexander G. G. M. Tielens; William D. Vacca
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Radial Velocity and Astrometric Evidence for a Close Companion to Betelgeuse
errASTROPHYSICAL JOURNAL
IF5.4
err2024-12-24
err0
errOAAI
errMacleod, Morgan; Blunt, Sarah; De Rosa, Robert J.; Dupree, Andrea K.; Granzer, Thomas; Harper, Graham M.; Huang, Caroline D.; Leiner, Emily M.; Loeb, Abraham; Nielsen, Eric L.; Strassmeier, Klaus G.; Wang, Jason J.; Weber, Michael
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errSave
Resolving Red Giant Winds with the Hubble Space Telescope
errASTROPHYSICAL JOURNAL
IF5.4
err2024-05-24
err0
errOAAI
errWood, Brian E.; Harper, Graham M.; Muller, Hans-Reinhard
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errSave
Detection of Rydberg Lines from the Atmosphere of Betelgeuse
errASTROPHYSICAL JOURNAL LETTERS
IF11.7
err2024-04-25
err2
errOAAI
errDent, W. R. F.; Harper, G. M.; Richards, A. M. S.; Kervella, P.; Matthews, L. D.
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errSave
HST STIS Observations of ζ Aurigae A's Irradiated Atmosphere
errASTRONOMICAL JOURNAL
IF5.1
err2022-06-27
err0
errOAAI
errHarper, Graham M.; Bennett, Philip D.; Brown, Alexander; Ayres, Thomas R.; Ohnaka, Keiichi; Griffin, Elizabeth
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errSave
The Wind Temperature and Mass-loss Rate of Arcturus (K1.5 III)
errASTROPHYSICAL JOURNAL
IF5.4
err2022-06-15
err3
errOAAI
errHarper, Graham M.; Ayres, Thomas R.; O'Gorman, Eamon
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errSave
SOFIA upGREAT/FIFI-LS Emission-line Observations of Betelgeuse during the Great Dimming of 2019/2020
errASTRONOMICAL JOURNAL
IF5.1
err2021-11-17
err2
errOAAI
errHarper, Graham M.; Chambers, Edward; Vacca, William D.; Wiesemeyer, Helmut; Fadda, Dario; DeWitt, Curtis; Wasatonic, Richard; Richards, Anita M. S.; Ryde, Nils; Fischer, Christian; Richter, Matthew J.; Guinan, Edward F.; Minchin, Robert; Graf, Urs U.; Colditz, Sebastian
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errSave
Observing early stellar nucleosynthesis
errNATURE ASTRONOMY
IF14.3
err2021-11-15
err0
PREAI
errRyde, Nils; Harper, Graham
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errSave
The Photospheric Temperatures of Betelgeuse during the Great Dimming of 2019/2020: No New Dust Required
errASTROPHYSICAL JOURNAL
IF5.4
err2020-12-09
err29
errOAAI
errHarper, Graham M.; Guinan, Edward F.; Wasatonic, Richard; Ryde, Nils
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errSave
SOFIA-EXES Observations of Betelgeuse during the Great Dimming of 2019/2020
errASTROPHYSICAL JOURNAL LETTERS
IF11.7
err2020-04-14
err10
errOAAI
errHarper, Graham M.; DeWitt, Curtis N.; Richter, Matthew J.; Guinan, Edward F.; Wasatonic, Richard; Ryde, Nils; Montiel, Edward J.; Townsend, Amanda J.
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errSave
NOEMA maps the CO J = 2 - 1 environment of the red supergiant μ Cep (vol 485, pg 2417, 2019)
errMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
IF4.8
err2019-04-10
err0
errOAAI
errMontarges, M.; Homan, W.; Keller, D.; Clementel, N.; Shetye, S.; Decin, L.; Harper, G. M.; Royer, P.; Winters, J. M.; Le Bertre, T.; Richards, A. M. S.
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errSave
NOEMA maps the CO J=2-1 environment of the red supergiant μ Cep
errMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
IF4.8
err2019-02-08
err22
errOAAI
errMontarges, M.; Homan, W.; Keller, D.; Clementel, N.; Shetye, S.; Decin, L.; Harper, G. M.; Royer, P.; Winters, J. M.; Le Bertre, T.; Richards, A. M. S.
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errSave
The close circumstellar environment of Betelgeuse V. Rotation velocity and molecular envelope properties from ALMA
errASTRONOMY & ASTROPHYSICS
IF5.8
err2018-01-09
err61
errOAAI
errKervella, Pierre; Decin, Leen; Richards, Anita M. S.; Harper, Graham M.; McDonald, Iain; O'Gorman, Eamon; Montarges, Miguel; Homan, Ward; Ohnaka, Keiichi
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errSave
An Updated 2017 Astrometric Solution for Betelgeuse
errASTRONOMICAL JOURNAL
IF5.1
err2017-06-16
err45
errOAAI
errHarper, G. M.; Brown, A.; Guinan, E. F.; O'Gorman, E.; Richards, A. M. S.; Kervella, P.; Decin, L.
errShare
errSave
The Secret Lives of Cepheids: δCep-The Prototype of a New Class of Pulsating X-Ray Variable Stars
errASTROPHYSICAL JOURNAL
IF5.4
err2017-03-24
err26
errOAAI
errEngle, Scott G.; Guinan, Edward F.; Harper, Graham M.; Cuntz, Manfred; Evans, Nancy Remage; Neilson, Hilding R.; Fawzy, Diaa E.
errShare
errSave
Detection of thermal radio emission from a single coronal giant
errASTRONOMY & ASTROPHYSICS
IF5.8
err2017-02-27
err5
errOAAI
errO'Gorman, E.; Harper, G. M.; Vlemmings, W.
errShare
errSave
SOFIA-EXES Mid-IR Observations of [Fe II] Emission from the Extended Atmosphere of Betelgeuse
errASTROPHYSICAL JOURNAL
IF5.4
err2017-02-06
err10
PREAI
errHarper, G. M.; DeWitt, C.; Richter, M. J.; Greathouse, T. K.; Ryde, N.; Guinan, E. F.; O'Gorman, E.; Vacca, W. D.
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HUBBLE SPACE TELESCOPE CONSTRAINTS ON THE WINDS AND ASTROSPHERES OF RED GIANT STARS
errASTROPHYSICAL JOURNAL
IF5.4
err2016-09-23
err16
errOAAI
errWood, Brian E.; Mueller, Hans-Reinhard; Harper, Graham M.
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Orbitally modulated photoexcited Si I emission in the eclipsing composite-spectrum binary ζ Aurigae
errMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
IF4.8
err2015-12-23
err4
errOAAI
errHarper, G. M.; Griffin, R. E. M.; Bennett, P. D.; O'Riain, N.
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Research Directions

No research directions
Co-authors
Cooperation Journals
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Roger J. Davis
H-index: 166 · Papers: 852
A
A. G. G. M. Tielens
H-index: 109 · Papers: 967
A
Abraham Loeb
H-index: 102 · Papers: 1.0K
L
L. Testi
H-index: 95 · Papers: 750
G
G. P. Zank
H-index: 81 · Papers: 1.4K
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