First Discoveries of the Galactic Plane eXoplanet Survey (GPX)
Paul Benni (Acton Sky Portal private observatory, Acton, MA, USA)[email protected]
Artem Burdanov (MIT), Vadim Krushinsky (Ural Federal Univ.), GPX follow-up Team, SOPHIE Team (OHP), TESS Team
Goal: Survey high-density star fields of the Milky Way galactic plane
Acton Sky Portal – Residential Private Observatory
SurveyHigh DensityStar fields(RASA11)
KPSGPX
Follow-Up(C14)
XOMASTER
KPSGPXKELTTESS
Exoplanet Transit Detection Method
Artem Burdanov started the Kourovka Planet Search (KPS) Prototype Survey and developed the data processing pipeline for KPS and GPX Surveys
NASA Ames
KPS-1b Transiting Hot Jupiter
Host star and planet similarto the Sun and Jupiter but with orbital period of 1.7 days.
RV validationSOPHIE (OHP)
A serendipitous discovery. RASA telescope imaged one randomly selected field for a few months
Big Dipper pointer stars … to an exoplanet!
The discovery of KPS-1b inspired us to upgrade the camera and add multiple field surveying capability, which became the GPX survey.
GPX-1b Transiting Brown DwarfLow Mass Brown DwarfPossibly Inflated AtmosphereYoung Age ~270 Myr*
BD Mass: 19.6 MJupBD Radius: 1.48 MJup
Star Mass: 1.68 MSunStar_Radius: 1.57 RSunTeff [K]: 7000Star type: F2
Period: 1.74 d
*Age: 270 (120-360) Myr
GPX-1b was not detected by TESS auto transit detection algorithms
A bright star greatly diluted and effectively hid the GPX-1b transits, unless one knew exactly where to look.
GPX Resolution (2 arcsec/px) TESS Image (20.25 arcsec/px)
Pre-Cataclysmic Binary with Unusual Chromaticity of the Eclipsed White Dwarf
WD eclipse is 10minutes in durationand deepest in REDfilters – suggesting accretion activity
Period: 7.1 hr
Nova in 9 Myr?
Publication: Krushinsky, et al., MNRAS, 493(4), 2020, 5208-17.
K7 star -WD
First Discoveries of the Galactic Plane eXoplanet Survey (GPX)
Paul Benni (Acton Sky Portal private observatory, Acton, MA, USA)[email protected]
Artem Burdanov (MIT), Vadim Krushinsky (Ural Federal Univ.), GPX follow-up Team, SOPHIE Team (OHP), TESS Team
Goal: Survey high-density star fields of the Milky Way galactic plane
GPX-1b ContributorsPaul Benni, Artem Burdanov, Vadim Krushinsky• SOPHIE Team (OHP)G. Hébrard, J. M. Almenara, S. Dalal, O. Demangeon, M. Tsantaki, • ReviewersJ. Pepper, K. G. Stassun, A. Vanderburg• GPX Follow-up TeamA. Bonfanti, M. Gillon, K. Barkaoui, A. Belinski, E. Sokov, E. Jehin, A. Popov, Ö. Bastürk, W. Kang, V. V. Dyachenko, D. A. Rastegaev, A. Beskakotov, E. Pakštiene, A. Marchini, R. Papini, F. Salvaggio, V.-P. Hentunen, S. Shadick, K. Ivanov, K. Antonyuk, G. Valyavin, M. Bretton, A. Wünsche, J. Garlitz, Y. Jongen, D. Molina, E. Girardin, F. Grau Horta, R. Naves• TESS Team K. Collins• KELT Follow-Up Network
