Skip to content

Research at St Andrews

A super-Earth and two sub-Neptunes transiting the nearby and quiet M dwarf TOI-270

Research output: Contribution to journalArticle

Open Access Status

  • Embargoed (until 26/01/20)

Author(s)

Maximilian N. Günther, Francisco J. Pozuelos, Jason A. Dittmann, Diana Dragomir, Stephen R. Kane, Tansu Daylan, Adina D. Feinstein, Chelsea X. Huang, Timothy D. Morton, Andrea Bonfanti, L. G. Bouma, Jennifer Burt, Karen A. Collins, Jack J. Lissauer, Elisabeth Matthews, Benjamin T. Montet, Andrew Vanderburg, Songhu Wang, Jennifer G. Winters, George R. Ricker & 40 others Roland K. Vanderspek, David W. Latham, Sara Seager, Joshua N. Winn, Jon M. Jenkins, James D. Armstrong, Khalid Barkaoui, Natalie Batalha, Jacob L. Bean, Douglas A. Caldwell, David R. Ciardi, Kevin I. Collins, Ian Crossfield, Michael Fausnaugh, Gabor Furesz, Tianjun Gan, Michaël Gillon, Natalia Guerrero, Keith Horne, Steve B. Howell, Michael Ireland, Giovanni Isopi, Emmanuël Jehin, John F. Kielkopf, Sebastien Lepine, Franco Mallia, Rachel A. Matson, Gordon Myers, Enric Palle, Samuel N. Quinn, Howard M. Relles, Bárbara Rojas-Ayala, Joshua Schlieder, Ramotholo Sefako, Avi Shporer, Juan C. Suárez, Thiam-Guan Tan, Eric B. Ting, Joseph D. Twicken, Ian A. Waite

School/Research organisations

Abstract

One of the primary goals of exoplanetary science is to detect small, temperate planets passing (transiting) in front of bright and quiet host stars. This enables the characterization of planetary sizes, orbits, bulk compositions, atmospheres and formation histories. These studies are facilitated by small and cool M dwarf host stars. Here we report the Transiting Exoplanet Survey Satellite (TESS)1 discovery of three small planets transiting one of the nearest and brightest M dwarf hosts observed to date, TOI-270 (TIC 259377017, with K-magnitude 8.3, and 22.5 parsecs away from Earth). The M3V-type star is transited by the super-Earth-sized planet TOI-270 b (1.247+0.089−0.083 R) and the sub-Neptune-sized planets TOI-270 c (2.42 ± 0.13 R) and TOI-270 d (2.13 ± 0.12 R). The planets orbit close to a mean-motion resonant chain, with periods (3.36 days, 5.66 days and 11.38 days, respectively) near ratios of small integers (5:3 and 2:1). TOI-270 is a prime target for future studies because (1) its near-resonance allows the detection of transit timing variations, enabling precise mass measurements and dynamical studies; (2) its brightness enables independent radial-velocity mass measurements; (3) the outer planets are ideal for atmospheric characterization via transmission spectroscopy; and (4) the quietness of the star enables future searches for habitable zone planets. Altogether, very few systems with small, temperate exoplanets are as suitable for such complementary and detailed characterization as TOI-270.
Close

Details

Original languageEnglish
JournalNature Astronomy
DOIs
Publication statusPublished - 29 Jul 2019

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. ROME/REA: a gravitational microlensing search for exoplanets beyond the snow line on a global network of robotic telescopes

    Tsapras, Y., Street, R. A., Hundertmark, M., Bachelet, E., Dominik, M., Bozza, V., Cassan, A., Wambsganss, J., Horne, K. D., Mao, S., Zang, W., Bramich, D. M. & Saha, A., 11 Oct 2019, In : Publications of the Astronomical Society of the Pacific. 131, 1006, p. 1-12 12 p., 1244401.

    Research output: Contribution to journalArticle

  2. Full orbital solution for the binary system in the Northern Galactic Disk microlensing event Gaia16aye

    Wyrzykowski, Ł., Mróz, P., Rybicki, K. A., Gromadzki, M., Kołaczkowski, Z., Zieliński, M., Zieliński, P., Britavskiy, N., Gomboc, A., Sokolovsky, K., Hodgkin, S. T., Abe, L., Aldi, G. F., AlMannaei, A., Altavilla, G., Qasim, A. A., Anupama, G. C., Awiphan, S., Bachelet, E., Bakis, V. & 152 others, Baker, S., Bartlett, S., Bendjoya, P., Benson, K., Bikmaev, I. F., Birenbaum, G., Blagorodnova, N., Blanco-Cuaresma, S., Boeva, S., Bonanos, A. Z., Bozza, V., Bramich, D. M., Bruni, I., Burenin, R. A., Burgaz, U., Butterley, T., Caines, H. E., Caton, D. B., Calchi Novati, S., Carrasco, J. M., Cassan, A., Čepas, V., Cropper, M., Chruślińska, M., Clementini, G., Clerici, A., Conti, D., Conti, M., Cross, S., Cusano, F., Damljanovic, G., Dapergolas, A., D'Ago, G., de Bruijne, J. H. J., Dennefeld, M., Dhillon, V. S., Dominik, M., Dziedzic, J., Erece, O., Eselevich, M. V., Esenoglu, H., Eyer, L., Figuera Jaimes, R., Fossey, S. J., Galeev, A. I., Grebenev, S. A., Gupta, A. C., Gutaev, A. G., Hallakoun, N., Hamanowicz, A., Han, C., Handzlik, B., Haislip, J. B., Hardy, L. K., Harrison, D. L., Hoette, V. L., Horne, K., Hudec, R., Hundertmark, M., Ihanec, N., Irtuganov, E. N., Itoh, R., Iwanek, P., Jovanovic, M. D., Janulis, R., Jelinek, M., Jensen, E., Kaczmarek, Z., Katz, D., Khamitov, I. M., Kilic, Y., Klencki, J., Kolb, U., Kouprianov, V. V., Kruszyńska, K., Kurowski, S., Latev, G., Lee, C-H., Leonini, S., Leto, G., Lewis, F., Li, Z., Liakos, A., Littlefair, S. P., Lu, J., Manser, C. J., Mao, S., Maoz, D., Maskoliunas, M., Maund, J. R., Melnikov, S. S., Ment, K., Mikołajczyk, P., Morrell, M., Mowlavi, N., Moździerski, D., Nazarov, S., Netzel, H., Nesci, R., Ngeow, C-C., Norton, A. J., Ofek, E. O., Pakstiene, E., Palaversa, L., Pandey, A., Paraskeva, E., Pawlak, M., Penny, M. T., Penprase, B. E., Piascik, A., Prieto, J. L., Qvam, J. K. T., Ranc, C., Rebassa-Mansergas, A., Reichart, D. E., Reig, P., Rhodes, L., Rivet, J-P., Rixon, G., Roberts, D., Rosi, P., Russell, D. M., Zanmar Sanchez, R., Scarpetta, G., Seabroke, G., Shappee, B. J., Schmidt, R., Shvartzvald, Y., Sitek, M., Skowron, J., Śniegowska, M., Snodgrass, C., Soares, P. S., Spetsieri, Z. T., Stankeviciute, A., Steele, I. A., Street, R. A., Strobl, J., Tinjaca Ramirez, L. M., Tomasella, L., Tsapras, Y., Villanueva, S. . J., Vince, O., Wambsganss, J., Wiersema, K., Wilson, R. W., Yoldas, A., Zhuchkov, R. Y., Zhukov, D. G., Zdanavicius, J., Zoła, S. & Zubareva, A., 11 Oct 2019, (Accepted/In press) In : Astronomy & Astrophysics.

    Research output: Contribution to journalArticle

  3. The first spectroscopic dust reverberation programme on active galactic nuclei: the torus in NGC 5548

    Landt, H., Ward, M. J., Kynoch, D., Packham, C., Ferland, G. J., Lawrence, A., Pott, J. -U., Esser, J., Horne, K., Starkey, D. A., Malhotra, D., Fausnaugh, M. M., Peterson, B. M., Wilman, R. J., Riffel, R. A., Storchi-Bergmann, T., Barth, A. J., Villforth, C. & Winkler, H., Oct 2019, In : Monthly Notices of the Royal Astronomical Society. 489, 2, p. 1572–1589

    Research output: Contribution to journalArticle

  4. Two new HATNet hot Jupiters around A stars, and the first glimpse at the occurrence rate of hot Jupiters from TESS*

    Zhou, G., Huang, C. X., Bakos, G. Á., Hartman, J. D., Latham, D. W., Quinn, S. N., Collins, K. A., Winn, J. N., Wong, I., Kovács, G., Csubry, Z., Bhatti, W., Penev, K., Bieryla, A., Esquerdo, G. A., Berlind, P., Calkins, M. L., de Val-Borro, M., Noyes, R. W., Lázár, J. & 51 others, Papp, I., Sári, P., Kovács, T., Buchhave, L. A., Szklenar, T., Béky, B., Johnson, M. C., Cochran, W. D., Kniazev, A. Y., Stassun, K. G., Fulton, B. J., Shporer, A., Espinoza, N., Bayliss, D., Everett, M., Howell, S. B., Hellier, C., Anderson, D. R., Cameron, A. C., West, R. G., Brown, D. J. A., Schanche, N., Barkaoui, K., Pozuelos, F., Gillon, M., Jehin, E., Benkhaldoun, Z., Daassou, A., Ricker, G., Vanderspek, R., Seager, S., Jenkins, J. M., Lissauer, J. J., Armstrong, J. D., Collins, K. I., Gan, T., Hart, R., Horne, K., Kielkopf, J. F., Nielsen, L. D., Nishiumi, T., Narita, N., Palle, E., Relles, H. M., Sefako, R., Tan, T. G., Davies, M., Goeke, R. F., Guerrero, N., Haworth, K. & Villanueva, S., Oct 2019, In : Astronomical Journal. 158, 4, p. 1-24 24 p., 141.

    Research output: Contribution to journalArticle

  5. OGLE-2015-BLG-1649Lb: a gas giant planet around a low-mass dwarf

    Nagakane, M., Lee, C-H., Koshimoto, N., Suzuki, D., Udalski, A., Beaulieu, J-P., Sumi, T., Bennett, D., Bond, I. A., Rattenbury, N. J., Bachelet, E., Dominik, M., Abe, F., Barry, R., Bhattacharya, A., Donachie, M., Fujii, H., Fukui, A., Hirao, Y., Itow, Y. & 49 others, Kamei, Y., Kondo, I., Li, M. C. A., Matsubara, Y., Matsuo, T., Miyazaki, S., Muraki, Y., Ranc, C., Shibai, H., Suematsu, H., Sullivan, D., Tristram, P., Yamakawa, T., Yonehara, A., Mróz, P., Poleski, R., Skowron, J., Szymański, M., Soszyński, I., Pietrukowicz, P., Kozłowski, S., Ulaczyk, K., Bramich, D., Cassan, A., Jaimes, R., Horne, K., Hundertmark, M., Mao, S., Menzies, J., Schmidt, R., Snodgrass, C., Steele, I., Street, R., Tsapras, Y., Wambsganss, J., Jørgensen, U., Bozza, V., Longã, P., Peixinho, N., Skottfelt, J., Southworth, J., Andersen, M. I., Burgdorf, M., D'Ago, G., Evans, D., Hinse, T., Korhonen, H., Rabus, M. & Rahvar, S., 25 Sep 2019, (Accepted/In press) In : Astronomical Journal.

    Research output: Contribution to journalArticle

Related by journal

  1. A direct test of density wave theory in a grand-design spiral galaxy

    Peterken, T., Merrifield, M., Aragón-Salamanca, A., Drory, N., Krawczyk, C., Masters, K., Weijmans, A-M. & Westfall, K., Feb 2019, In : Nature Astronomy. 3, p. 178-182 5 p.

    Research output: Contribution to journalArticle

  2. A giant impact as the likely origin of different twins in the Kepler-107 exoplanet system

    Bonomo, A. S., Zeng, L., Damasso, M., Leinhardt, Z. M., Justesen, A. B., Lopez, E., Lund, M. N., Malavolta, L., Silva Aguirre, V., Buchhave, L. A., Corsaro, E., Denman, T., Lopez-Morales, M., Mills, S. M., Mortier, A., Rice, K., Sozzetti, A., Vanderburg, A., Affer, L., Arentoft, T. & 32 others, Benbakoura, M., Bouchy, F., Christensen-Dalsgaard, J., Collier Cameron, A., Cosentino, R., Dressing, C. D., Dumusque, X., Figueira, P., Fiorenzano, A. F. M., García, R. A., Handberg, R., Harutyunyan, A., Johnson, J. A., Kjeldsen, H., Latham, D. W., Lovis, C., Lundkvist, M. S., Mathur, S., Mayor, M., Micela, G., Molinari, E., Motalebi, F., Nascimbeni, V., Nava, C., Pepe, F., Phillips, D. F., Piotto, G., Poretti, E., Sasselov, D., Ségransan, D., Udry, S. & Watson, C., May 2019, In : Nature Astronomy. 3, p. 416-423 8 p.

    Research output: Contribution to journalArticle

  3. The diverse evolutionary pathways of post-starburst galaxies

    Pawlik, M. M., McAlpine, S., Trayford, J. W., Wild, V., Bower, R., Crain, R. A., Schaller, M. & Schaye, J., Mar 2019, In : Nature Astronomy. 3, p. 440-446 7 p.

    Research output: Contribution to journalArticle

  4. A common Milgromian acceleration scale in nature

    Kroupa, P., Banik, I., Haghi, H., Zonoozi, A. H., Dabringhausen, J., Javanmardi, B., Mueller, O., Wu, X. & Zhao, H., Dec 2018, In : Nature Astronomy. 2, p. 925-926 2 p.

    Research output: Contribution to journalComment/debate

ID: 260578865

Top