Graduate Student, Center for Astrophysics | Harvard & Smithsonian
I am a first-year graduate student at the Center for Astrophysics | Harvard & Smithsonian, working in exoplanet transmission spectroscopy with the ACCESS survey and in radio observations of exoplanet and brown dwarf magnetic fields. I also work with the Planetary Habitability Laboratory of the University of Puerto Rico at Arecibo as a radio astronomer studying dwarf stars with planets using Arecibo Observatory data.
Arecibo REDS: The Stellar Activity of Stars with Potentially Habitable Planets
The stellar activity of red dwarf stars is of particular interest due to their potential to host
habitable planets around them. These planets could experience atmospheric erosion and be rendered
inhabitable if subject to frequent flaring activity; this activity is associated with detectable
radio emissions. We exploit the sensitivity of the Arecibo Observatory radio telescope to observe
nearby red dwarf stars with potentially habitable planets and study their flaring activity.
As a member of Arecibo REDS, I plan observing sessions and carry them out on-site, and reduce and
analyze data.
You can read more about it here!
N-body Simulations of a Warm Jupiter Near Resonance with a Sub-Neptune
While very few hot Jupiters are known to have nearby planetary companions, warm
Jupiters with nearby small planets are much more common. Our team found an interesting
case of a warm Jupiter near resonance with an outer sub-Neptune. To further explore the
behavior of this configuration, I am programming dynamical simulations of this system to
test its stability and evolution. So far, I have found that the system can be stable within
the known constraints set by Kepler and radial velocity data, but I rule out many configurations
with high eccentricities (>0.15) or mutual inclinations (>5 degrees).
Check out my presentation below to learn more!
Radio OH Observations of the First Interstellar Comet 2I/Borisov
Comet 2I/Borisov was first observed September 8, 2019 and was quickly identified as originating from
outside the Solar System due to its highly eccentric, hyperbolic orbit. This is the first interstellar
comet to be discovered so far. Radio observations of comets have been successfully performed since 1973,
when comet C/1973 E1 (Kohoutek) was observed in search of the hydroxyl (OH) radical in the comet’s coma;
the OH radical is a photodissociation product of water and can be used to quantify the water production
of the comet. Using the Arecibo Observatory, we observed 2I/Borisov over the course of its passage
through the northern sky, looking for this same OH signal. Though the campaign resulted in a non-detection,
our results are consistent with observations at other wavelengths, and future work includes obtaining
upper limits on water production from our data.
You can read more about it here!
Puerto Rico Science Policy Action Network
The Puerto Rico Science Policy Action Network (PR-SPAN) is a coalition of Puerto Rican scientists who advocate
for evidence-based policy at the local, state, and federal level. As a PR-SPAN Ambassador, I engage legislators and policymakers on science and science policy issues and serve as a resource on these areas.
See some of our updates here!
Community Participation in PHL Observations
The Planetary Habitability Laboratory invites students and community members to participate in our observations
at the Arecibo Observatory. As a PHL observer, I help bring interested people to our observations, offer them
talks about our projects and the workings of the telescope, give them tours of the control room, and show them
how the telescope is operated in real time. If you are in Puerto Rico and interested in participating,
shoot me an email!
Circle of University Astrobiology
The Circle of University Astrobiology (CiAsU) at the University of Puerto Rico, Río Piedras Campus, is a
student organization for both science and non-science majors interested in astrobiology. We host several
projects at our campus such as micrometeorite hunts and campus flora geotagging, as well as activities such
as talks by astrobiologists and our famous Quantum Poetry Night. As Vice President of CiAsU, I help organize
the group and lead a project in which we are uncovering the history of the first ever astronomical observatory
of Puerto Rico, which sits abandoned and which we hope to restore. Read more about this initiative here, and check us out on
Facebook and
Instagram!
Email: [email protected]
Mailing Address:
TO: Kevin Ortiz Ceballos
MS-10, Center for Astrophysics | Harvard & Smithsonian
60 Garden St., Cambridge, MA 02138
Secondary Address:
Planetary Habitability Laboratory | phl.upr.edu
University of Puerto Rico at Arecibo
Carr. 653 Km. 0.8 Sector Las Dunas
Arecibo, PR 00613