[en] We report the discovery of NGTS-4b, a sub-Neptune-sized planet transiting a 13th magnitude K-dwarf in a 1.34d orbit. NGTS-4b has a mass M=$20.6\pm3.0$M_E and radius R=$3.18\pm0.26$R_E, which places it well within the so-called "Neptunian Desert". The mean density of the planet ($3.45\pm0.95$g/cm^3) is consistent with a composition of 100% H$_2$O or a rocky core with a volatile envelope. NGTS-4b is likely to suffer significant mass loss due to relatively strong EUV/X-ray irradiation. Its survival in the Neptunian desert may be due to an unusually high core mass, or it may have avoided the most intense X-ray irradiation by migrating after the initial activity of its host star had subsided. With a transit depth of $0.13\pm0.02$%, NGTS-4b represents the shallowest transiting system ever discovered from the ground, and is the smallest planet discovered in a wide-field ground-based photometric survey.
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Bibliography
Akeson R. L. et al., 2013, PASP, 125, 989
Arenou F. et al., 2018, A&A, 616, 29
Bailer-Jones C. A. L., Rybizki J., Fouesneau M., Mantelet G., Andrae R., 2018, AJ, 156, 58
Bakos G., Noyes R.W., Kovács G., Stanek K. Z., Sasselov D. D., Domsa I., 2004, PASP, 116, 266
Bakos G. Á. et al., 2010, ApJ, 710, 1724
Bakos G. Á. et al., 2013, PASP, 125, 154
Barbary K., 2016, SEP: Source Extractor as a library, The Journal of Open Source Software, 1, 58
Bovy J., Rix H.-W., Green G. M., Schlafly E. F., Finkbeiner D. P., 2016, ApJ, 818, 130
Brown T. M. et al., 2013, PASP, 125, 1031
Burdanov A., Delrez L., Gillon M., Jehin E., Speculoos-Trappist Teams, 2017, in Deeg H., Belmonte J., eds, SPECULOOS Exoplanet Search and Its Prototype on TRAPPIST. Springer, Cham, p. 130
Castelli F., Kurucz R. L., 2004, A&A, 419, 725
Chazelas B. et al., 2012, in Stepp L. M., Gilmozzi R., Hall H. J., eds, Proc. SPIE Conf. Ser. Vol. 8444, Ground-based and Airborne Telescopes IV. SPIE, Bellingham, p. 1
Collier Cameron A. et al., 2006, MNRAS, 373, 799
Coppejans R. et al., 2013, PASP, 125, 976
Craig M. W., et al., 2015, Astrophysics Source Code Library, record, ascl:1510.007
Delrez L. et al., 2018, Proc. SPIE Conf. Ser. Vol. 10700, Society of Photo-Optical Instrumentation Engineers. SPIE, Bellingham, p. 21
dos Santos L. A. et al., 2016, A&A, 592, 8
Dotter A., 2016, ApJS, 222, 8
Ehrenreich D. et al., 2015, Nature, 522, 459
Fulton B. J., Petigura E. A., 2018, AJ, 156, 13
Gaia Collaboration, 2018b, A&A, 616, 29
Gaia Collaboration, Brown A. G. A., Vallenari A., Prusti T., de Bruijne J. H. J., Babusiaux C., Bailer-Jones C. A. L., 2018a, A&A, 616, 22
Gaudi B. S. et al., 2017, Nature, 546, 514
Gillen E., Hillenbrand L. A., David T. J., Aigrain S., Rebull L., Stauffer J., Cody A. M., Queloz D., 2017, ApJ, 849, 11
Gillon M. et al., 2013, A&A, 552, 13
Gillon M. et al., 2016, Nature, 533, 221
Grether D., Lineweaver C. H., 2006, ApJ, 640, 1051
Irwin J., Charbonneau D., Nutzman P., Falco E., 2009, in Pont F., Sasselov D., Holman M. J., eds, Proc. IAU Symp. 253, Transiting Planets, Cambridge University Press. p. 37
Jackson A. P., Davis T. A., Wheatley P. J., 2012, MNRAS, 422, 2024
King G. W. et al., 2018, MNRAS, 478, 1193
Kovács G., Zucker S., Mazeh T., 2002, A&A, 391, 369
Kurokawa H., Nakamoto T., 2014, ApJ, 783, 54
Lammer H., Selsis F., Ribas I., Guinan E. F., Bauer S. J., WeissW.W., 2003, ApJ, 598, L121
Lavie B. et al., 2017, A&A, 605, 7
Lecavelier Des Etangs A., 2007, A&A, 461, 1185
Lendl M. et al., 2012, A&A, 544, A72
Lopez E. D., Fortney J. J., 2014, ApJ, 792, 1
Mandel K., Agol E., 2002, ApJ, 580, L171
Mann A. W., Feiden G. A., Gaidos E., Boyajian T., von Braun K., 2015, ApJ, 804, 64
McCormac J., Pollacco D., Skillen I., Faedi F., Todd I., Watson C. A., 2013, PASP, 125, 548
Nutzman P., Charbonneau D., 2008, PASP, 120, 317
Owen J. E., Lai D., 2018, MNRAS, 479, 5012
Parviainen H., Aigrain S., 2015, MNRAS, 453, 3821
Pepper J. et al., 2007, PASP, 119, 923
Pepper J., Kuhn R. B., Siverd R., James D., Stassun K., 2012, PASP, 124, 230
Pollacco D. L. et al., 2006, PASP, 118, 1407
Queloz D. et al., 2001, A&A, 379, 279
Ricker G. R. et al., 2014, in Proc. SPIE Conf. Ser. Vol. 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave. SPIE, Bellingham, p. 914320
Schönrich R., Binney J., Dehnen W., 2010, MNRAS, 403, 1829
Seager S., Kuchner M., Hier-Majumder C. A., Militzer B., 2007, ApJ, 669, 1279
Skrutskie M. F. et al., 2006, AJ, 131, 1163
Sneden C. A., 1973, PhD thesis, Univ. Texas Austin
Soto M. G., Jenkins J. S., 2018, A&A, 615, 28
Sousa S. G., Santos N. C., Adibekyan V., Delgado-Mena E., Israelian G., 2015, A&A, 577, 4
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