Science Highlights

Scroll down to find information about my first author publications and selected research projects. Click on images for short descriptions.
A complete publication list can be found on the SAO/NASA Astrophysics Data System (ADS).

Refereed first author publications

• An Earth-like stellar wind environment for Proxima Centauri c

Alvarado-Gómez, J. D.; Drake, J. J.; Garraffo, C.; Cohen, O.; Poppenhäger K.; Yadav, R. K.; Moschou, S. P.
Keywords: Magnetic Fields — Magnetohydrodynamics (MHD) — Stars: individual (Proxima Cen) — Stellar Corona — Stellar Winds

This work has been published in The Astrophysical Journal Letters.

• Tuning the exo-space weather radio for stellar coronal mass ejections

Alvarado-Gómez, J. D.; Drake, J. J.; Fraschetti, F; Garraffo, C.; Cohen, O.; Vocks, C.; Poppenhäger K.;
Moschou, S. P.; Yadav, R. K.; Manchester, W. B.
Keywords: Magnetic Fields — Magnetohydrodynamics (MHD) — Stellar Activity — Stellar Corona — Stellar Coronal Mass Ejections (CMEs)

This work has been published in The Astrophysical Journal.

• Coronal response to magnetically suppressed CME events in M-dwarf stars

Alvarado-Gómez, J. D.; Drake, J. J.; Moschou, S. P.; Garraffo, C.; Cohen, O.; Yadav, R. K.; Fraschetti, F.
Keywords: Magnetic Fields — Magnetohydrodynamics (MHD) — Stellar Activity — Stellar Corona — Stellar Coronal Mass Ejections (CMEs)

This work has been published in The Astrophysical Journal Letters.

• Breezing through the space environment of Barnard’s star b

Alvarado-Gómez, J. D.; Garraffo, C.; Drake, J. J.; Brown, B. P.; Oishi, J. S.; Moschou, S. P.; Cohen, O.
Keywords: Magnetic Fields — Magnetohydrodynamics (MHD) — Stars: individual (Barnard's Star) — Stellar Activity — Stellar Winds

This work has been published in The Astrophysical Journal Letters.

• Suppression of coronal mass ejections in active stars by an overlying large-scale magnetic field: A numerical study

Alvarado-Gómez, J. D.; Drake, J. J.; Cohen, O.; Moschou, S. P.; Garraffo, C.
Keywords: Magnetic Fields — Magnetohydrodynamics (MHD) — Stellar Activity — Stellar Winds — Coronal Mass Ejections (CME)

This work has been published in The Astrophysical Journal.

• Far beyond the Sun: I. The beating magnetic heart in Horologium

Alvarado-Gómez, J. D.; Hussain, G. A. J.; Drake, J. J.; Donati, J.-F.; Sanz-Forcada, J.; Stelzer, B.; Cohen, O.; Amazo-Gómez, E. M.; Grunhut, J. H.; Garraffo, C.; Moschou, S. P.; Silvester, J.; Oksala, M. E.
Keywords: Magnetic Fields — Exoplanet Host — Solar-Type Stars — Spectropolarimetry — Stellar Activity

This work has been published in Monthly Notices of the Royal Astronomical Society.

• Simulating the environment around planet-hosting stars — II. Stellar winds and inner astrospheres

Alvarado-Gómez, J. D.; Hussain, G. A. J.; Cohen, O.; Drake, J. J.; Garraffo, C.; Grunhut, J.; Gombosi, T.I.
Keywords: Stellar Winds — Mass-Loss — Magnetic Fields — Late-Type — Magnetohydrodynamics (MHD)

This work has been published as cover of Volume 594 of Astronomy & Astrophysics.

• Simulating the environment around planet-hosting stars — I. Coronal structure

Alvarado-Gómez, J. D.; Hussain, G. A. J.; Cohen, O.; Drake, J. J.; Garraffo, C.; Grunhut, J.; Gombosi, T.I.
Keywords: Coronae — Magnetic Fields — Late-Type — Magnetohydrodynamics (MHD)

This work has been published in Astronomy & Astrophysics.

• Activity and magnetic field structure of the Sun-like planet-hosting star HD 1237

Alvarado-Gómez, J. D.; Hussain, G. A. J.; Grunhut, J.; Fares, R.; Donati, J.-F.; Alecian, E.; Kochukhov, O.; Oksala, M.; Morin, J.; Redfield, S.; Cohen, O.; Drake, J. J.; Jardine, M.; Matt, S.; Petit, P.; Walter, F. M.
Keywords: Activity — Magnetic Fields — Solar Type — Spectropolarimetry — Zeeman Doppler Imaging (ZDI)

This work has been published in Astronomy & Astrophysics.

• Magneto-acoustic energetics study of the seismically active flare of 15 February 2011

Alvarado-Gómez, J. D.; Buitrago-Casas, J. C.; Martínez-Oliveros, J. C.; Lindsey, C.; Hudson, H.; Calvo-Mozo, B.
Keywords: Magnetic Field Variation — Flares— Local Helioseismology — Sunquakes

This work has been published in Solar Physics.

Selected observational and numerical projects

• Chandra EUV capabilities: A new view of Jupiter

Type: Observing Time Proposal | P.I.: William Dunn
Co-Investigators: Alvarado-Gómez, J. D.; Bonfond, B.; Branduardi-Raymont, G.; Clarke, J. T.; Drake, J. J.; Gladstone, R. G.; Grodent, D. C.; Jackman, C. M.; Kraft, R.; McClain, E.; Ray, L.; Snios, B.; Weigt, D. Wibisono, A.; Yao, Z.
Telescope/Instrument: Chandra + HST/HRC + STIS
Allocated time: 42 ks + 1 Orbit
Cycles: 22 (Chandra) & 28 (HST)

• Weaving the history of the solar wind with magnetic field lines

Type: Observing Time Proposal | P.I.: Julián D. Alvarado-Gómez
Co-Investigators: Amazo-Gómez, E. M.; Cohen, O.; Drake, J. J.; Garraffo, C.; Hussain, G. A. J.; Moschou, S. P.; Redfield, S.; Sanz-Forcada, J.; Stelzer, B.; Wood, B. E.
Telescope/Instrument: HST/STIS
Allocated time: 15 Orbits
Cycles: 25 & 26

• Characterizing the winds of M-dwarf stars

Type: Observing Time Proposal | P.I.: Brian E. Wood
Co-Investigators: Alvarado-Gómez, J. D.; Cohen, O.; Drake, J. J.; Garraffo, C.; Jardine, M.; Linsky, J.; Redfield, S.; Vidotto, A.
Telescope/Instrument: HST/STIS
Allocated time: 36 Orbits
Cycle: 25

• Searching for atmospheric loss signatures in the newly discovered super-Earth GJ 9827b

Type: Observing Time Proposal | P.I.: Seth Redfield
Co-Investigators: Alvarado-Gómez, J. D.; Cauley, P.; France, K.; Gandolfi, D.; Guenther, E.; Hussain, G. A. J.; Linsky, J.; Livingston, J.; Narita, N.; Niraula, P.; Shkolnik, E.; Wood, B.; Youngblood, A.
Telescope/Instrument: HST/STIS
Allocated time: 9 Orbits
Cycle: 25 (Mid-cycle proposal)

• X-rays beyond the wind dividing line

Type: Observing Time Proposal | P.I.: Julián D. Alvarado-Gómez
Co-Investigators: Drake, J. J.; Redfield, S.; Sanz-Forcada, J.; Stelzer, B.; Wood, B. E.
Telescope/Instrument: XMM-Newton/EPIC
Allocated time: 20 ks
Period: AO-17

• The high-energy environment of the triple super-earth host GJ 9827

Type: Observing Time Proposal | P.I.: Jeremy J. Drake
Co-Investigators: Alvarado-Gómez, J. D.; Hussain, G. A. J.; Redfield, S.; Cohen, O.; Garraffo, C.; Moschou, S. P.
Telescope/Instrument: XMM-Newton/EPIC
Allocated time: 30 ks
Period: AO-17

• The puzzling activity cycle of the planet-host star ι Hor

Type: Observing Time Proposal | P.I.: Jorge Sanz-Forcada
Co-Investigators: Stelzer, B.; Alvarado-Gómez, J. D.; Amazo-Gómez, E. M.
Telescope/Instrument: XMM-Newton/EPIC
Allocated time: 20 ks
Period: AO-16

• Stellar activity and space weather in the GJ 9827 system

Type: Observing Time Proposal | P.I.: Gaitee A. J. Hussain
Co-Investigators: Alvarado-Gómez, J. D.; Gandolfi, D.; Prieto-Arranz, J.; Redfield, S.; Niraula, P.; Drake, J. J.
Telescope/Instrument: ESO 3.6m/HARPSpol
Allocated time: 40.0 Hours | Top-Ranked proposal
Period: P102

• The "Far Beyond the Sun Campaign"

Type: Observing Time Proposal | P.I.: Julián D. Alvarado-Gómez
Co-Investigators: Hussain, G. A. J.; Drake, J. J.; Sanz-Forcada, J.; Stelzer, B.; Cohen, O.; Amazo-Gómez, E. M.; Grunhut, J.; Donati, J.-F.
Telescope/Instrument: ESO 3.6m/HARPSpol
Allocated time: 237.0 Hours | Top-Ranked proposal
Periods: P96 to P101 (6 consecutive observing semesters)
Cover Story of the Science News Magazine (Vol. 196, Issue No. 6, 28 Sep. 2019)

• Coronal mass ejections in the Chandra-Kepler flare survey

Type: Computing Time Proposal | P.I.: Julián D. Alvarado-Gómez
Co-Investigator: Drake, J. J.
Facility/Cluster: NASA Advanced Supercomputing Division/Pleiades cluster
Allocated time: 140k core hours
Period: 2018-2020

• Coronal mass ejections in the Chandra-Kepler flare survey

Type: Computing Time Proposal | P.I.: Julián D. Alvarado-Gómez
Co-Investigator: Drake, J. J.
Facility/Cluster: XSEDE Ecosystem/Comet + superMIC clusters
Allocated time: 100k core hours
Period: 2017-2018

• Modeling the corona, winds and space weather conditions in moderately active Sun-like stars

Type: Computing Time Proposal | P.I.: Julián D. Alvarado-Gómez
Co-Investigators: Hussain, G. A. J.; Drake, J. J.; Cohen, O.
Facility/Cluster: Leibniz Supercomputing Centre (LRZ)/Computational Center for Particle and Astrophysics (C2PAP)
Allocated time: 840k core hours
Period: 2015-2017