Monday, March 21, 2016

The day we took over astro-ph!

Today I am happy to announce that four of my former students have all posted their science papers to astro-ph* on the same day.   Along with posting one of my conference proceedings, we have "taken over" astro-ph for the day!

* What is astro-ph?  It's part of arxiv.org, a server where scientists post pre-prints of their papers.  It's the main place where all astronomers go to see the latest research.  We discuss them over coffee five mornings a week, we get emails five nights a week with the latest additions.  Oftentimes, papers appear here before a Journal has reviewed the paper.

All four papers are accepted for publication in the following scientific journals - The Astrophysical Journal, The Monthly Notices of the Royal Astronomical Society, and the Publications of the Astronomy Society of the Pacific.

Now my esteemed colleagues, my former students will guest author posts here over the coming weeks about their papers.

Here are brief descriptions and links to the papers:

  • Dr. Jonathan Gagne, a former NASA Exoplanet Science Institute Visiting Graduate Student Fellow, and now a NASA Sagan Postdoctoral Fellow at Carnegie DTM in Washington DC, published a survey of 36 nearby and/or young M dwarfs looking for evidence of exoplanet candidates.  In this paper, Dr. Gagne made use of a novel technique for the Doppler Effect at near-infrared wavelengths with the NASA Infrared Telescope Facility and CSHELL spectrograph.  Read on for what we found!
  • Peter Gao, a current Caltech Planetary Sciences graduate student, and soon to be NASA Postdoctoral Program Fellow at NASA Ames, published a novel data analysis for near-infrared echelle spectra for the purposes of high-precision radial velocity measurements.  Peter successfully implemented what has been referred to as the "grand solution" in deriving the underlying stellar spectra from the data.  This is particularly helpful in the presence of absorption lines (tellurics) from the Earth's atmosphere.  Read on for what we found!
  • Dr. Huan Meng, a former NASA Exoplanet Science Institute Visiting Graduate Student Fellow, and now a postdoctoral scholar at the University of Arizona, published the first detection of a light echo from the inner circumstellar disk around a young, accreting proto-star.  Dr. Meng took the wildly successful technique for measuring the distances to clouds of gas surrounding supermassive black holes at the centers of many galaxies, called reverberation mapping, and scaled it down to observe young stars in Rho Ophiuchus with the use of the Spitzer Space Telescope and four ground-based observatories.  Read on for what we found!
  • Giri Gopalan, a former Caltech Summer Undergraduate Research Fellow, published a paper describing a new version of the successful Trend Filtering Algorithm (TFA), used to detect transiting exoplanets from ground-based telescope surveys.  In his paper, he restates the TFA  equations in a matrix formulation, which allows for the introduction of including measurement uncertainties, and also introduces a common machine learning technique - hierarchical clustering - for the optimization of selecting the trends used.  Read on for what we found!
  • Finally, I published a conference proceedings from the International Astronomical Union Symposium, held in Atlanta, GA in May 2015.  This short two page report summarizes the Near-Infrared Radial Velocity Survey (Project NIRRVS) of which Jonathan and Peter are leaders of our collaboration.  Read on here!

PS, at least one more paper is coming!

Tuesday, March 1, 2016

Recruiting the next Generation of Astronomers

One year ago the astronomy community was rocked by the national news of protests surrounding the construction of the Thirty Meter Telescope atop Mauna Kea in Hawaii:

http://www.huffingtonpost.com/2015/04/13/hawaii-telescope-protests-tmt-mauna-kea_n_7044164.html

Relations were further strained when two UC Berkeley Astronomy professors made unfortunate choices of language in emails about the protests.  Whatever their intent, the impact of these emails mattered.  Members of our astronomy community and Hawaiians saw these emails as racist to varying extents, particularly in the context of the history of the US assimilation of Hawaii:

https://storify.com/docfreeride/team-science-apologizes-badly-widens-rift-with-mau

http://mahalonottrash.blogspot.com/2015/05/decolonizing-astronomy-or-why-debt.html

Wherever your opinions may lie, these events and others over the past year have led to conversations about race, sexual harassment, and the potential for change in our community.  Importantly, those receptive to new, diverse viewpoints have had an opportunity to hear them.

In particular, I joined a new Facebook group promoting equity and inclusion in professional astronomy. This group is a "next level safe zone" where minorities and women can express their viewpoints, and have them echoed and supported by like-minded individuals.  My role in this group is not to tell others what I think is best; it's simply to listen and learn.  And it's changed me in the process too.

One of the leading voices of this new community is Professor John Johnson at Harvard University.  He posts regularly to his blog at: http://mahalonottrash.blogspot.com/ . I've known John Johnson for a number of years, particularly while we overlapped at Caltech.  We first met when we shared a dinner as graduate students at Lick Observatory.  Since then, I've been fortunate to collaborate with him on the MINERVA Observatory among several other papers and projects.  John Johnson is quantifiably the most prolific observational exoplanet scientist to earn their astronomy PhD in the past 15 years. 

This past July, I found myself sitting down to dinner once again with John Johnson.  We were both attending the Extreme Precise Radial Velocity Conference held at Yale.  He's a busy guy, and we don't get to interact as often now that we've both left Caltech.  I asked John - what can I personally do to improve the diversity of our field?  How do I foster such an environment?  John Johnson's answer was obvious in hindsight. It was a forehead slapping moment for me:

Recruiting.

If premier athletic departments can devote full-time personnel to recruiting the best athletes worldwide, why couldn't I borrow some of their techniques and switch from passive to active recruiting?  What gets a top-level high school athlete to commit to a particular University?  It's the personal connection that recruiters form with them number one, and number two, the promise of being in a successful environment.

John Johnson suggested I go recruit from predominantly minority area high schools in the St Louis area.  John himself grew up in a suburb of St Louis, and went to college in nearby Rolla, Missouri before becoming an academic rock star as a graduate student at UC Berkeley.   He recommended that I establish personal relationships with the physics teachers and their students, and to encourage the students to come to Missouri State University to conduct exoplanet research with me.  Fostering an inclusive and equitable environment once they matriculate is the other half of the equation.

So, that's what I've done and I will continue to do.  I contacted a few high school principals in the St Louis suburbs, including in Ferguson, one of the birthplaces of #blacklivesmatter.  One forwarded my information on to their physics teacher.  We corresponded for a few weeks, and he agreed to let me come and talk to the physics students at two of the high schools he teaches at.

One early morning this fall, I hopped into my car and drove the three hours to St Louis.  I visited two physics classes at two different high schools.  It was a real learning experience for me, the physics teacher, and the students.  I opened the students' eyes to potential careers in science that they hadn't known about before.  I gave each of them my business card and asked them to stay in touch if they decided to apply to Missouri State University.  I offered them research opportunities in my group if they matriculated.  The physics teacher has invited me back for next year.  Personally, as I drove home later that afternoon, I found the experience to be incredibly rewarding.  I was #ohdi - Out Here, Doing It.  Time will tell, but I hope to have an impact on the future diversity of our field for the better.

Visiting a high school physics class room in the St Louis area to recruit the next generation of Astronomers.
A few months later in December 2015, the protests at the University of Missouri (a two hour drive away in Columbia) would echo on my campus at Missouri State University.  A group of students submitted a list of demands to our University President.  Our University administration fortunately listened immediately, and it's a work in progress.

During one lecture in my general education astronomy class, I expressed support and encouragement to those students on my campus.  After all, college is a place for students to find their voice, and education doesn't always come in the form of a classroom.  After class, several students came up to me and thanked me for what I had said.  Unbeknownst to me, one minority student was a freshman thinking about majoring in Physics and Astronomy.  He was in the classroom at the back, listening. He hadn't spoken to me the entire semester.  And on that day he came up to the front of the large lecture hall, shook my hand, and joined my research group.