Introducing Peter Boorman

Peter Boorman (@boorm) is a PhD student at the University of Southampton in the UK, where he currently studies hidden monster supermassive black holes actively growing at the centres of galaxies.  These black holes grow by eating material surrounding them which can also act to conceal the active galactic nucleus (AGN) from our view.  This is why Peter relies on high-energy X-ray vision (courtesy of X-ray telescopes in space such as @NASANuSTAR!) to be able to stare through the obscuring layers of gas concealing the AGN, and reveal the hungry black hole lurking beneath.  However, much like Superman’s X-ray vision being blocked by lead, the densest and thickest layers of obscuring gas can even stop the highest energy X-rays from escaping some heavily obscured black holes.
Despite their apparent rarity, it is predicted that there are a very high number of these hiding supermassive black holes out there in the Universe that just haven’t been found yet.  These AGN are essential for understanding the evolution of all supermassive black holes, and hence all galaxies hosting them since the dawn of the Universe over 13 billion years ago.  With observations of galaxies in the local Universe, Peter will figure out how many obscured AGN there are on average, and how many have been missed in the past.  When Peter isn’t spying on the most obscured black hole banquets in the Universe, he enjoys baking cakes and cooking lots of different recipes, as well as running long distances to burn it off!

Introducing James Matthews

James Matthews is postdoctoral researcher at University of Oxford where he tries to understand where the highest energy cosmic rays come from. Cosmic rays are particles with energies up to 100 billion billion electron volts (that’s a lot of energy!) that strike our atmosphere and produce showers of secondary particles, which we can detect at places like the Pierre Auger observatory. Although they were discovered at the start of the 20th century, we still don’t really know where the highest energy cosmic rays come from.
James’ work is mostly theoretical; I do hydrodynamics simulations of outflows from active galactic nuclei (AGN) to see if they produce the observed cosmic rays. AGN are supermassive black holes that shine brightly due to the gas that is falling onto them, meaning they are interesting for all sorts of reasons — not just for cosmic ray astrophysicists! So, he also works on trying to generally understand the outflows and accretion discs that form part of their sometimes confusing behaviour. James’ PhD thesis, completed at the University of Southampton, focused on this topic. Outside of academia James plays guitar and keyboards in a band called Waking Aida and enjoy football, squash and good pubs!

Introducing Héctor Vives-Arias

Héctor Vives-Arias (@DarkSapiens) obtained his PhD in Physics at the University of Valencia, Spain, using gravitational lenses to study both the structure of quasars and the distribution of dark matter subhaloes. He is currently a postdoc at the Instituto de Astrofísica de Canarias (IAC), where he works with ALMA observations of the active galactic nucleus in NGC 1068 to try to understand the structure and kinematics of the dust and molecular gas surrounding its center.
In his last year as an undergrad he got a summer grant at the IAC, where he analyzed the distribution and velocity of the gas in several nearby active galactic nuclei by working with near infrared integral field spectroscopy data from the SINFONI instrument at the VLT. For his Master’s thesis in Valencia, however, he switched to gravitational lens systems in which quasars were multiply imaged by foreground galaxies. Continuing this work on this PhD thesis, he used observations of the Einstein Cross in the optical and mid infrared (from the CanariCam instrument at the Gran Telescopio Canarias) to determine the size and temperature profile of the accretion disk of the quasar by studying the gravitational microlensing in the system, and also to estimate the amount of substructure in the dark matter halo of the lens galaxy that would produce the non-microlensed flux ratios between the quasar images. He also stayed for about a year at the University of Manchester, where he learned to work with radio interferometry data. There, he processed VLA observations of another lens system in order to measure the flux ratios between the multiple images, and to also determine the size of the radio emitting region.
He is currently working on a study of a dozen quadruply lensed systems to estimate the abundance of dark matter subhaloes from the flux ratios between the quasar images in observations of their narrow line regions, radio cores, and dusty tori, while also analyzing ALMA data of nearby active galactic nuclei to study those dusty tori directly in his recently started postdoc at the IAC.
Despite his research focus on active galaxies and dark matter, his scientific interests are much broader than that, and he always tries to keep learning as much as he can about many different fields. He has a passion for science communication that has helped him remain motivated in the low moments of academic life, and he regularly enjoys explaining science on Twitter, blog articles, radio programs, podcasts, and public talks. Other hobbies include archery, drawing, and 3D animation and rendering.

Introducing Abhijeet Borkar

I did my B.Sc. from the Fergusson College, Pune, India in 2010, M.Sc. in Physics from the University of Pune, Pune, India, with specialization in Quantum Field Theory. After that I went for PhD at the University of Cologne, Cologne, Germany, as a part of the International Max Planck Research School (IMPRS) at the Max Planck Institute for Radio Astronomy (MPIfR). I recently completed my PhD in November 2015, and will soon start my first post-doc position at the Astronomical Institute of the Czech Academy of Sciences in Prague, Czech Republic.

For my masters’ thesis, I worked on the modelling of the gas distribution in local dwarf galaxies and relating the star formation rates with the gas distribution. My PhD thesis was about the observations of the Galactic Center at 3 mm to study the flaring activity of Sagittarius A*, the supermassive black hole at the center of the Milky Way, and the study of the stellar SiO maser sources in the central parsec region. My research interests include the Galactic Center region, the AGN-host relation & Evolution, Cosmic Archaeology, Formation of first objects in the Universe (First Stars, First Galaxies, First Black Holes), Radio Interferometry etc.

I am also fairly active in public outreach in India, where I have been involved with the Astro Club at the Fergusson College, Pune. Currently involved in activities related to improving science awareness among students in parts of rural India.

You can find me on Twitter at @borkarabhijeet

Introducing Mark Lacy

Mark Lacy works at the National Radio Astronomy Observatory in Charlottesville, Virginia. He works on support for the ALMA telescope as part of the North American ALMA Science Center, principally on data processing and user support for the ALMA archive. His science interests lie in the infrared and radio, in particular using surveys with the Spitzer Space Telescope as a basis to study galaxy evolution and active galactic nuclei.

Mark obtained his PhD in radio astronomy in 1993 from Cambridge University in the UK, after a postdoc and a temporary lectureship at Oxford he moved to the US in 1999 to work as a postdoc at Lawrence Livermore Laboratory before moving the the Spitzer Science Center in 2002, and then to NRAO in 2009. Mark can normally be found at @markdavidlacy.