Ignazio Pillitteri


 

 

Title: Researcher at INAF-Osservatorio Astronomico di Palermo, research associate with the Harvard-Smithsonian Center for Astrophysics (Cambridge, MA,  USA)

Research interests: stellar activity, exoplanets, young stars

Publications: link to ADS (new tab/window)

Address: Piazza del Parlamento 1, 90134 Palermo – Italy

Phone: +39 091 233 420

 

 

 


CV

2015 Visiting scientist at Harvard-Smithsonian Center for Astrophysics
June 2014 Visiting scientist at Harvard-Smithsonian Center for Astrophysics
Oct 2013 Visiting scientist at Harvard-Smithsonian Center for Astrophysics
2009-2012 Fellowship at Smithsonian-Harvard Center for Astrophysics
2012-2014Marie Curie fellowship at INAF-Osservatorio Astronomico di Palermo

2005-2008 Post-doc fellowship at University of Palermo Italy

Education

2001 Master Degree (“laurea”) in Physics at the Universita degli Studi di Palermo.
2005 PhD in Physics at the Universita` degli Studi di Palermo

Service to the profession

2010/2011Facilitator for the Chandra Peer Review.
2010/2014 Organizer of seminars and talks at the host institute
Peer reviewer for major scientific journals
Public outreach

Recent results and press releases

Detection of magnetic field in Rho Oph A

With a follow up with the ESO-VLT FORS2 instrument , we have detected a magnetic field in the X-ray bright B2 star Rho Oph A. The star showed periodic enhancement of its X-ray flux every 1.2 days. We interpreted this behavior as due to an active region of magnetic origin, bright in X-rays, periodically appearing on view on the stellar surface. Spectropolarimetry observations with FORS2 have indeed confirmed that the star has a magnetic field of about 500 G as hypothesized from X-ray observations.

 

https://arxiv.org/abs/1712.00728

V1818 Ori is part of the cluster around Kappa Ori

I observed the group of young stellar objects around the Be star V1818 Ori with XMM-Newton. This group of objects was thought to be part of the Mon R2 Association at 900 pc, however it seems to sit in the ring of dust around Kappa Ori at 250 pc. By calculating the X-ray luminosities of the stars in V1818 Ori and comparing their distribution with that of other groups of young stars near Kappa Ori I determined that also V1818 Ori is part of the young spherical cluster around Kappa Ori. This study proves the effectiveness of X-ray observations in determining the structure of galactic young clusters.

 

https://doi.org/10.1051/0004-6361/201731303

 

The early B-type star Rho Oph A is an X-ray lighthouse

With a 140 ks XMM-Newton observation my collaborators and I discovered periodic X-ray variability of the early B-type star Rho Oph A. This is explained as an intrinsic strong magnetism and a large surface spot, or due to an unseen low mass companion in a very tight orbit.
https://doi.org/10.1051/0004-6361/201630070

New stars discovered in the Rho Ophiuchi Dark Cloud

X-rays combined with infrared emission from stars around the star Rho Ophiuchi reveal they are older than expected

https://phys.org/news/2016-05-stars-rho-ophiuchi-dark-cloud.html

Star-forming ring spotted around distant supergiant star Kappa Ori

Infrared and radio emission of warm dust around the giant star Kappa Ori. The dust contains dozens of young stars very bright in X-rays.

https://phys.org/news/2016-03-star-forming-distant-supergiant-star-kappa.html

 

NASA’s Chandra X-ray Observatory Finds Planet That Makes Star Act Deceptively Old

The massive planet WASP-18b orbits in only 20 hours around its star. The star does not emit X-rays as expected. Is the planet destroying the X-ray activity of its host?

https://www.nasa.gov/press/2014/september/nasa-s-chandra-x-ray-observatory-finds-planet-that-makes-star-act-deceptively/

 

HD 189733 is one of the best studied star with a Hot Jupiter. XMM and HST observations combined with MHD simulations suggest that planetary mass could accrete onto the star.

 

 

http://beyondearthlyskies.blogspot.it/2015/03/accreting-material-from-hot-jupiter.html