The Astronomical Journal (Jan 2024)
Gaia22dkvLb: A Microlensing Planet Potentially Accessible to Radial-velocity Characterization
- Zexuan Wu,
- Subo Dong,
- Tuan Yi,
- Zhuokai Liu,
- Kareem El-Badry,
- Andrew Gould,
- L. Wyrzykowski,
- K. A. Rybicki,
- Etienne Bachelet,
- Grant W. Christie,
- L. de Almeida,
- L. A. G. Monard,
- J. McCormick,
- Tim Natusch,
- P. Zieliński,
- Huiling Chen,
- Yang Huang,
- Chang Liu,
- A. Mérand,
- Przemek Mróz,
- Jinyi Shangguan,
- Andrzej Udalski,
- J. Woillez,
- Huawei Zhang,
- Franz-Josef Hambsch,
- P. J. Mikołajczyk,
- M. Gromadzki,
- M. Ratajczak,
- Katarzyna Kruszyńska,
- N. Ihanec,
- Uliana Pylypenko,
- M. Sitek,
- K. Howil,
- Staszek Zola,
- Olga Michniewicz,
- Michal Zejmo,
- Fraser Lewis,
- Mateusz Bronikowski,
- Stephen Potter,
- Jan Andrzejewski,
- Jaroslav Merc,
- Rachel Street,
- Akihiko Fukui,
- R. Figuera Jaimes,
- V. Bozza,
- P. Rota,
- A. Cassan,
- M. Dominik,
- Y. Tsapras,
- M. Hundertmark,
- J. Wambsganss,
- K. Bąkowska,
- A. Słowikowska
Affiliations
- Zexuan Wu
- ORCiD
- Department of Astronomy, School of Physics, Peking University , Yiheyuan Rd. 5, Haidian District, Beijing, 100871, People's Republic of China ; [email protected]; Kavli Institute of Astronomy and Astrophysics, Peking University , Yiheyuan Rd. 5, Haidian District, Beijing, 100871, People's Republic of China
- Subo Dong
- ORCiD
- Department of Astronomy, School of Physics, Peking University , Yiheyuan Rd. 5, Haidian District, Beijing, 100871, People's Republic of China ; [email protected]; Kavli Institute of Astronomy and Astrophysics, Peking University , Yiheyuan Rd. 5, Haidian District, Beijing, 100871, People's Republic of China
- Tuan Yi
- ORCiD
- Department of Astronomy, School of Physics, Peking University , Yiheyuan Rd. 5, Haidian District, Beijing, 100871, People's Republic of China ; [email protected]; Kavli Institute of Astronomy and Astrophysics, Peking University , Yiheyuan Rd. 5, Haidian District, Beijing, 100871, People's Republic of China
- Zhuokai Liu
- Department of Astronomy, School of Physics, Peking University , Yiheyuan Rd. 5, Haidian District, Beijing, 100871, People's Republic of China ; [email protected]; Kavli Institute of Astronomy and Astrophysics, Peking University , Yiheyuan Rd. 5, Haidian District, Beijing, 100871, People's Republic of China
- Kareem El-Badry
- ORCiD
- Department of Astronomy , California Institute of Technology, Pasadena, CA 91125, USA
- Andrew Gould
- Max-Planck Institute for Astronomy , Königstuhl 17, D-69117 Heidelberg, Germany; Department of Astronomy, Ohio State University , 140 W. 18th Ave., Columbus, OH 43210, USA
- L. Wyrzykowski
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- K. A. Rybicki
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland; Department of Particle Physics and Astrophysics, Weizmann Institute of Science , Rehovot 76100, Israel
- Etienne Bachelet
- ORCiD
- IPAC , Mail Code 100-22, Caltech, 1200 E. California Blvd., Pasadena, CA 91125, USA
- Grant W. Christie
- Auckland Observatory , Auckland, New Zealand
- L. de Almeida
- ORCiD
- Laboratório Nacional de Astrofísica , Rua Estados Unidos 154, 37504-364 Itajubá—MG, Brazil
- L. A. G. Monard
- Klein Karoo Observatory, Centre for Backyard Astrophysics , Calitzdorp, South Africa
- J. McCormick
- Farm Cove Observatory, Centre for Backyard Astrophysics , Pakuranga, Auckland, New Zealand
- Tim Natusch
- Auckland Observatory , Auckland, New Zealand; Mathematical Sciences Department, Auckland University of Technology , Auckland, New Zealand
- P. Zieliński
- ORCiD
- Institute of Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University in Toruń , Grudziądzka 5, 87-100 Toruń, Poland
- Huiling Chen
- Department of Astronomy, School of Physics, Peking University , Yiheyuan Rd. 5, Haidian District, Beijing, 100871, People's Republic of China ; [email protected]; Kavli Institute of Astronomy and Astrophysics, Peking University , Yiheyuan Rd. 5, Haidian District, Beijing, 100871, People's Republic of China
- Yang Huang
- ORCiD
- University of Chinese Academy of Sciences , Beijing 100049, People's Republic of China; National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100012, People's Republic of China
- Chang Liu
- ORCiD
- Department of Physics and Astronomy, Northwestern University , 2145 Sheridan Rd., Evanston, IL 60208, USA; Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA), Northwestern University , 1800 Sherman Ave., Evanston, IL 60201, USA
- A. Mérand
- ORCiD
- European Southern Observatory , Karl-Schwarzschild-Str. 2, 85748 Garching, Germany
- Przemek Mróz
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Jinyi Shangguan
- ORCiD
- Max Planck Institute for Extraterrestrial Physics , Giessenbachstr. 1, 85748, Garching, Germany
- Andrzej Udalski
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- J. Woillez
- ORCiD
- European Southern Observatory , Karl-Schwarzschild-Str. 2, 85748 Garching, Germany
- Huawei Zhang
- ORCiD
- Department of Astronomy, School of Physics, Peking University , Yiheyuan Rd. 5, Haidian District, Beijing, 100871, People's Republic of China ; [email protected]; Kavli Institute of Astronomy and Astrophysics, Peking University , Yiheyuan Rd. 5, Haidian District, Beijing, 100871, People's Republic of China
- Franz-Josef Hambsch
- ORCiD
- Vereniging Voor Sterrenkunde (VVS) , Oostmeers 122 C, 8000 Brugge, Belgium; AAVSO , 185 Alewife Brook Parkway, Suite 410, Cambridge, MA 02138, USA; Groupe Européen d’Observations Stellaires (GEOS) , 23 Parc de Levesville, 28300 Bailleau l’Evêque, France; Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne (BAV) , Munsterdamm 90, 12169 Berlin, Germany
- P. J. Mikołajczyk
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland; Astronomical Institute, University of Wrocław , ul. M. Kopernika 11, 51-622 Wrocław, Poland
- M. Gromadzki
- ORCiD
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- M. Ratajczak
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Katarzyna Kruszyńska
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland; Las Cumbres Observatory , 6740 Cortona Dr., Goleta, CA 93117, USA
- N. Ihanec
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Uliana Pylypenko
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- M. Sitek
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- K. Howil
- Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, 00-478 Warszawa, Poland
- Staszek Zola
- ORCiD
- Astronomical Observatory of the Jagiellonian University , ul. Orla 171, 30-244 Krakow, Poland
- Olga Michniewicz
- Janusz Gil Institute of Astronomy, University of Zielona Góra , Poland
- Michal Zejmo
- Janusz Gil Institute of Astronomy, University of Zielona Góra , Poland
- Fraser Lewis
- Faulkes Telescope Project , UK; The Schools Observatory , UK
- Mateusz Bronikowski
- Center for Astrophysics and Cosmology, University of Nova Gorica , Vipavska 11c, 5270 Ajdovščina, Slovenia
- Stephen Potter
- South African Astronomical Observatory , Observatory Road, Observatory, 7925, Cape Town, South Africa; Department of Physics, University of Johannesburg , PO Box 524, Auckland Park 2006, South Africa
- Jan Andrzejewski
- Janusz Gil Institute of Astronomy, University of Zielona Góra , Poland
- Jaroslav Merc
- ORCiD
- Astronomical Institute, Faculty of Mathematics and Physics, Charles University , V Holešovičkách 2, 180 00 Prague, Czech Republic
- Rachel Street
- ORCiD
- Las Cumbres Observatory , 6740 Cortona Drive, Suite 102, Goleta, CA 93117, USA
- Akihiko Fukui
- ORCiD
- Komaba Institute for Science, The University of Tokyo , 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan; Instituto de Astrofísica de Canarias , Vía Láctea s/n, E-38205 La Laguna, Tenerife, Spain
- R. Figuera Jaimes
- millennium Institute of Astrophysics MAS , Nuncio Monsenor Sotero Sanz 100, Of. 104, Providencia, Santiago, Chile; Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile , Av. Vicuña mackenna 4860, 7820436 Macul, Santiago, Chile
- V. Bozza
- ORCiD
- Dipartimento di Fisica “E.R. Caianiello,” Università di Salerno , Via Giovanni Paolo II 132, Fisciano, 84084, Italy; Istituto Nazionale di Fisica Nucleare , Sezione di Napoli, Via Cintia, 80126, Napoli, Italy
- P. Rota
- Dipartimento di Fisica “E.R. Caianiello,” Università di Salerno , Via Giovanni Paolo II 132, Fisciano, 84084, Italy
- A. Cassan
- Institut d’Astrophysique de Paris, Sorbonne Université , CNRS, UMR 7095, 98 bis bd Arago, F-75014 Paris, France
- M. Dominik
- ORCiD
- University of St Andrews , Centre for Exoplanet Science, SUPA School of Physics & Astronomy, North Haugh, St Andrews, KY16 9SS, UK
- Y. Tsapras
- ORCiD
- Zentrum für Astronomie der Universität Heidelberg , Astronomisches Rechen-Institut, Mönchhofstr. 12-14, 69120 Heidelberg, Germany
- M. Hundertmark
- Zentrum für Astronomie der Universität Heidelberg , Astronomisches Rechen-Institut, Mönchhofstr. 12-14, 69120 Heidelberg, Germany
- J. Wambsganss
- ORCiD
- Zentrum für Astronomie der Universität Heidelberg , Astronomisches Rechen-Institut, Mönchhofstr. 12-14, 69120 Heidelberg, Germany
- K. Bąkowska
- Institute of Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University in Toruń , Grudziądzka 5, 87-100 Toruń, Poland
- A. Słowikowska
- ORCiD
- Institute of Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University in Toruń , Grudziądzka 5, 87-100 Toruń, Poland; Joint Institute for VLBI ERIC (JIVE) , Oude Hoogeveensedijk 4, 7991 PD Dwingeloo, The Netherlands
- DOI
- https://doi.org/10.3847/1538-3881/ad5203
- Journal volume & issue
-
Vol. 168,
no. 2
p. 62
Abstract
We report discovering an exoplanet from following up a microlensing event alerted by Gaia. The event Gaia22dkv is toward a disk source rather than the traditional bulge microlensing fields. Our primary analysis yields a Jovian planet with ${M}_{{\rm{p}}}={0.59}_{-0.05}^{+0.15}\,{M}_{{\rm{J}}}$ at a projected orbital separation ${r}_{\perp }={1.4}_{-0.3}^{+0.8}$ au, and the host is a ∼1.1 M _⊙ turnoff star at ∼1.3 kpc. At $r^{\prime} \approx 14$ , the host is far brighter than any previously discovered microlensing planet host, opening up the opportunity to test the microlensing model with radial velocity (RV) observations. RV data can be used to measure the planet’s orbital period and eccentricity, and they also enable searching for inner planets of the microlensing cold Jupiter, as expected from the “inner–outer correlation” inferred from Kepler and RV discoveries. Furthermore, we show that Gaia astrometric microlensing will not only allow precise measurements of its angular Einstein radius θ _E but also directly measure the microlens parallax vector and unambiguously break a geometric light-curve degeneracy, leading to the definitive characterization of the lens system.
Keywords
