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Luigi C. Gallo

Department of Astronomy & Physics, Saint Mary's University

EXPLORING BLACK HOLES

I study the environments surrounding supermassive black holes called active galactic nuclei (AGN). Understanding how matter falls into an AGN reveals a great deal about the conditions and geometry around it, and can even disclose properties of the black hole itself (e.g. mass and spin). I use X-ray observations to facilitate my work. X-rays are produced in the hottest and most volatile regions nearest black holes.

I am also involved in a number of new and upcoming missions that will revolutionize the field of X-ray astronomy in the near future.

I am always interested in working with motivated students. If you would like to pursue a project with me or are intetest in graduate school, feel free to contact me.


SMASHERS

The Gallo research team.
Saint Mary's AstophysicS High-Energy ResearcherS


Boss

Margaret Buhariwalla

PhD student

Boss

Hunter Fryman-Sinkhorn

MSc student

Boss

Akshay Ghosh

MSc student

Boss

Adam Gonzalez

Postdoc Fellow

Boss

Angelo Hollett

MSc student

Boss

David Koranteng

BSc student

Boss

Katherine Myers

BSc student

Boss

Benjamin Pottie

BSc student

Boss

Shruti Tripathi

Research Associate

Suzaku Seyfert 1 Sample

Our Work

You can find a complete list of my publications at this ADS link.

Here, I have listed a selection of recent works including some new publications, public talks, and future mission studies. Each is linked to where you can get additional information.

Snow

Eclipsing the X-ray emitting region in NGC 6814

Science Paper

We report the detection of a rapid occultation event in a nearby Seyfert galaxy. The eclipse allows us to determine the size of the X-ray region as well as the location and properties of the obscuring gas.

Snow

Uncovering the primary X-ray emission in Mrk 1239

Science Paper

Multi-epoch, broadband X-ray spectroscopy of the optically-defined type 1 AGN, Mrk 1239 reveal a highly absorbed system and evidence for emission from multiple ionised plasmas. This work was led by grad student M. Buhariwalla.

Snow

Tracking the year-to-year variation in the spectral energy distribution of the narrow-line Seyfert 1 galaxy Mrk 335

Science Paper

Tracking changes in the optical-to-X-ray spectral energy distribution of Mrk 335 over 13-years shows the changes are related to the X-ray (i.e. corona) with only modest changes originating in the optical-UV (i.e. accretion disc). This work was led by PDF S. Tripath.

Lights

Black holes: The loud, the quiet, and the silent

Public Talk

A public talk I delivered to the RASC in March 2021.

Lights

XRISM (JAXA)

(NASA site)

Mission launch in 2022

The X-ray Imaging and Spectroscopy Mission (XRISM) is expected to provide breakthrough results in diverse scientific areas, including the behavior of matter in extreme gravitational fields.

Lights

Arcus

Mission Concept

Arcus is a high resolution X-ray grating spectrometer mission that will investigate from the small scales to the largest, including the composition of minute interstellar dust grains, stellar evolution, feedback from supermassive black holes, and structure formation in galaxy clusters.

Lights

ATHENA

Mission launch in early 2030s

The Advanced Telescope for High ENergy Astrophysics (ATHENA) is the X-ray observatory mission selected by ESA to address the Hot and Energetic Universe scientific theme.

Suzaku Seyfert 1 Sample
Contact

Luigi C. Gallo, Professor

  Saint Mary's University

    Department of Astronomy & Physics

    923 Robie Street, Halfiax NS, B3H 3C3, Canada

  +1 902 420 5637

  luigi.gallo AT smu.ca