Publications and communications of Sebastián Gaspar Zúñiga Fernández

Gómez Maqueo Chew, Y., Dransfield, G., Barkaoui, K., Cadieux, C., Ducrot, E., Rackham, B. V., Timmermans, M., Burgasser, A. J., Segura, A., Stassun, K. G., Ziegler, C., Soubkiou, A., Almenara, J. M., Demory, B. O., Gillon, M., Jenkins, J. M., Jofré, E., Khandelwal, A., Páez, S., ... Santos, N. C. (01 May 2026). TOI-1080 b: a temperate, rocky planet orbiting a quiet M4V host. Monthly Notices of the Royal Astronomical Society, 548, 438. doi:10.1093/mnras/stag438

Dransfield, G., Timmermans, M., Sebastian, D., Rackham, B. V., Burgasser, A., Barkaoui, K., Triaud, A. H. M. J., Gillon, M., Almenara, J. M., Casewell, S. L., Collins, K. A., Fukui, A., Janó Muñoz, C., Kanodia, S., Narita, N., Palle, E., Scott, M. G., Soubkiou, A., Stokholm, A., ... Zúñiga Fernández, S. G. (01 April 2026). MANGOS ─ II. Five new giant planets orbiting low-mass stars. Monthly Notices of the Royal Astronomical Society, 547, 448. doi:10.1093/mnras/stag448

Scott, M. G., Dransfield, G., Timmermans, M., Triaud, A. H. M. J., Rackham, B. V., Barkaoui, K., Burgasser, A. J., Collins, K. A., Gillon, M., Howell, S. B., Levine, A. M., Pozuelos, F. J., Stassun, K. G., Ziegler, C., Chew, Y. G. M., Clark, C. A., Davis, Y., Davoudi, F., Daylan, T., ... Zúñiga Fernández, S. G. (01 March 2026). Two temperate Earth- and Neptune-sized planets orbiting fully convective M dwarfs. Monthly Notices of the Royal Astronomical Society, 547, 070. doi:10.1093/mnras/stag070

Barkaoui, K., Pozuelos, F. J., Rackham, B. V., Burgasser, A. J., Triaud, A. H. M. J., Serra-Ricart, M., Timmermans, M., Yalçınkaya, S., Soubkiou, A., Stassun, K. G., Collins, K. A., Amado, P. J., Baștürk, Ö., Burdanov, A., Davis, Y. T., de Wit, J., Demory, B.-O., Deveny, S., Dransfield, G., ... Zúñiga Fernández, S. G. (01 December 2025). TOI-7166 b: a habitable zone mini-Neptune planet around a nearby low-mass star. Monthly Notices of the Royal Astronomical Society, 544, 2637-2652. doi:10.1093/mnras/staf1807

Zúñiga Fernández, S. G. (November 2025). The discovery of TRAPPIST-1 and the importance of low-mass M-dwarfs. Nature Astronomy, 9 (11), 1588 - 1589. doi:10.1038/s41550-025-02712-6

Yalçinkaya, S., Barkaoui, K., Baştürk, Ö., Gillon, M., Pozuelos, F. J., Timmermans, M., Rackham, B. V., Burgasser, A. J., Mistry, P., Peláez-Torres, A., Morello, G., Pass, E. K., Bieryla, A., Latham, D. W., Collins, K. A., Akar, F., Benkhaldoun, Z., Burdanov, A., Brande, J., ... Zúñiga Fernández, S. G. (01 October 2025). TOI-1743 b, TOI-5799 b, TOI-5799 c, and TOI-6223 b: TESS discovery and validation of four super-Earth to Neptune-sized planets around M dwarfs. Astronomy and Astrophysics, 702, 209. doi:10.1051/0004-6361/202556293

Zúñiga Fernández, S. G., Pozuelos, F. J., Dévora-Pajares, M., Cuello, N., Greklek-McKeon, M., Stassun, K. G., Van Grootel, V., Rojas-Ayala, B., Korth, J., Günther, M. N., Burgasser, A. J., Hsu, C., Rackham, B. V., Barkaoui, K., Timmermans, M., Cadieux, C., Alonso, R., Strakhov, I. A., Howell, S. B., ... Gillon, M. (2025). Two warm Earth-sized exoplanets and an Earth-sized candidate in the M5V-M6V binary system TOI-2267. Astronomy and Astrophysics. doi:10.1051/0004-6361/202554419

Bourrier, V., Steiner, M., Castro-González, A., Armstrong, D. J., Attia, M., Gill, S., Timmermans, M., Fernandez, J., Hawthorn, F., Triaud, A. H. M. J., Murgas, F., Palle, E., Chakraborty, H., Poppenhaeger, K., Lendl, M., Anderson, D. R., Bryant, E. M., Friden, E., Seidel, J. V., ... Pietrow, A. G. M. (01 September 2025). ATREIDES: I. Embarking on a trek across the exo-Neptunian landscape with the TOI-421 system. Astronomy and Astrophysics, 701, 190. doi:10.1051/0004-6361/202554856

Dileep, A., Joshi, S., Alexeeva, S., Kochukhov, O., Semenko, E., De Cat, P., Zúñiga Fernández, S. G., Trust, O., Pollard, K., Crause, L., Barkaoui, K., Gillon, M., Jehin, E., & Rathore, N. (01 September 2025). Chemical abundances and Doppler imaging of the Ap Si/He-wk star HD 100357. Monthly Notices of the Royal Astronomical Society, 542, 747-761. doi:10.1093/mnras/staf1247

Bryant, E. M., Jordán, A., Hartman, J. D., Bayliss, D., Sedaghati, E., Barkaoui, K., Chouqar, J., Pozuelos, F. J., Thorngren, D. P., Timmermans, M., Almenara, J. M., Chilingarian, I. V., Collins, K. A., Gan, T., Howell, S. B., Narita, N., Palle, E., Rackham, B. V., Triaud, A. H. M. J., ... Zúñiga Fernández, S. G. (01 July 2025). A transiting giant planet in orbit around a 0.2-solar-mass host star. Nature Astronomy, 9, 1031-1044. doi:10.1038/s41550-025-02552-4

Janó Muñoz, C., Hooton, M. J., Pedersen, P. P., Barkaoui, K., Rackham, B. V., Burgasser, A. J., Pozuelos, F. J., Stassun, K. G., Queloz, D., Triaud, A. H. M. J., Ziegler, C., Almenara, J. M., Timmermans, M., Bonfils, X., Collins, K. A., Demory, B. O., Dransfield, G., Ghachoui, M., Gillon, M., ... Zúñiga Fernández, S. G. (01 July 2025). TOI-2407 b: a warm Neptune in the desert. Monthly Notices of the Royal Astronomical Society, 541, 630-641. doi:10.1093/mnras/staf946

Barkaoui, K., Zúñiga Fernández, S. G., Gillon, M., Timmermans, M., Stalport, M., & Davoudi, F. (02 April 2025). TOI-6508 b: A massive transiting brown dwarf orbiting a low-mass star. Astronomy and Astrophysics, 696, 44. doi:10.1051/0004-6361/202453508

Barkaoui, K., Korth, J., Gaidos, E., Agol, E., Parviainen, H., Pozuelos, F. J., Palle, E., Narita, N., Grimm, S., Brady, M., Bean, J. L., Morello, G., Rackham, B. V., Burgasser, A. J., Van Grootel, V., Rojas-Ayala, B., Seifahrt, A., Marfil, E., Passegger, V. M., ... Zúñiga Fernández, S. G. (March 2025). TOI-2015 b: A sub-Neptune in strong gravitational interaction with an outer non-transiting planet. Astronomy and Astrophysics, 695, 281. doi:10.1051/0004-6361/202452916

Zúñiga Fernández, S. G., Burdanov, A., Delrez, L., Gillon, M., & Jehin, E. (2025). SPECULOOS Exoplanet Search and Its Prototype on TRAPPIST. In Handbook of Exoplanets. Springer Nature Switzerland. doi:10.1007/978-3-319-30648-3_130-3

Hartman, J. D., Bayliss, D., Brahm, R., Bryant, E. M., Jordán, A., Bakos, G. Á., Hobson, M. J., Sedaghati, E., Bonfils, X., Cointepas, M., Almenara, J. M., Barkaoui, K., Timmermans, M., Dransfield, G., Ducrot, E., Zúñiga Fernández, S. G., Hooton, M. J., Pedersen, P. P., Pozuelos, F. J., ... Rodriguez, D. R. (01 November 2024). TOI 762 A b and TIC 46432937 b: Two Giant Planets Transiting M-dwarf Stars. Astronomical Journal, 168, 202. doi:10.3847/1538-3881/ad6f07

Pedersen, P. P., Queloz, D. P., Garcia, L., Schacke, Y., Delrez, L., Demory, B.-O., Ducrot, E., Dransfield, G., Gillon, M., Hooton, M. J., Janó-Muñoz, C., Jehin, E., Sebastian, D., Timmermans, M., Thompson, S., Triaud, A. H. M. J., de Wit, J., & Zúñiga Fernández, S. G. (2024). Infrared photometry with InGaAs detectors: first light with SPECULOOS. Proceedings of SPIE: The International Society for Optical Engineering. doi:10.1117/12.3018320

Timmermans, M., Dransfield, G., Gillon, M., Triaud, A. H. M. J., Rackham, B. V., Aganze, C., Barkaoui, K., Briceño, C., Burgasser, A. J., Collins, K. A., Cointepas, M., Dévora-Pajares, M., Ducrot, E., Zúñiga Fernández, S. G., Howell, S. B., Kaltenegger, L., Murray, C. A., Pass, E. K., Quinn, S. N., ... Winn, J. N. (01 April 2024). TOI-4336 A b: A temperate sub-Neptune ripe for atmospheric characterization in a nearby triple M-dwarf system. Astronomy and Astrophysics, 687, 48. doi:10.1051/0004-6361/202347981

Jones, M. I., Reinarz, Y., Brahm, R., Tala Pinto, M., Eberhardt, J., Rojas, F., Triaud, A. H. M. J., Gupta, A. F., Ziegler, C., Hobson, M. J., Jordán, A., Henning, T., Trifonov, T., Schlecker, M., Espinoza, N., Torres-Miranda, P., Sarkis, P., Ulmer-Moll, S., Lendl, M., ... Lissauer, J. J. (March 2024). A long-period transiting substellar companion in the super-Jupiters to brown dwarfs mass regime and a prototypical warm-Jupiter detected by TESS. Astronomy and Astrophysics, 683, 192. doi:10.1051/0004-6361/202348147

Henderson, B. A., Casewell, S. L., Goad, M. R., Acton, J. S., Günther, M. N., Nielsen, L. D., Burleigh, M. R., Belardi, C., Tilbrook, R. H., Turner, O., Howell, S. B., Clark, C. A., Littlefield, C., Barkaoui, K., Alves, D. R., Anderson, D. R., Bayliss, D., Bouchy, F., Bryant, E. M., ... Zúñiga Fernández, S. G. (21 February 2024). NGTS-28Ab: a short period transiting brown dwarf. Monthly Notices of the Royal Astronomical Society, 530 (1), 318-339. doi:10.1093/mnras/stae508

Dransfield, G., Timmermans, M., Amaury H. M. J. Triaud, Dévora-Pajares, M., Aganze, C., Barkaoui, K., Burgasser, A. J., Collins, K. A., Cointepas, M., Ducrot, E., Günther, M. N., Howell, S. B., Murray, C. A., Niraula, P., Rackham, B. V., Sebastian, D., Stassun, K. G., Zúñiga Fernández, S. G., Manuel Almenara, J., ... Zapparata, A. (2024). A 1.55 R$_{\oplus}$ habitable-zone planet hosted by TOI-715, an M4 star near the ecliptic South Pole. Monthly Notices of the Royal Astronomical Society. doi:10.1093/mnras/stad1439

Gillon, M., Pedersen, P. P., Rackham, B. V., Dransfield, G., Ducrot, E., Barkaoui, K., Burdanov, A. Y., Schroffenegger, U., Gómez Maqueo Chew, Y., Lederer, S. M., Alonso, R., Burgasser, A. J., Howell, S. B., Narita, N., de Wit, J., Demory, B.-O., Queloz, D., Triaud, A. H. M. J., Delrez, L., ... Zong Lang, F. (2024). Detection of an Earth-sized exoplanet orbiting the nearby ultracool dwarf star SPECULOOS-3. Nature Astronomy. doi:10.1038/s41550-024-02271-2

Zúñiga Fernández, S. G., Gillon, M., Pedersen, P. P., Sebastian, D., Burdanov, A., Demory, B.-O., Triaud, A. H. M. J., de Wit, J., Jehin, E., Queloz, D., Garcia, L. J., Timmermans, M., Barkaoui, K., Baycroft, T., Davis, Y., Davoudi, F., Delrez, L., Ducrot, E., Gómez Maqueo Chew, Y., ... Yalçinkaya, S. (2024). SPECULOOS: five years hunting terrestrial planets around ultra-cool dwarfs. Proceedings of SPIE: The International Society for Optical Engineering. doi:10.1117/12.3020550

Triaud, A. H. M. J., Dransfield, G., Kagetani, T., Timmermans, M., Narita, N., Barkaoui, K., Hirano, T., Rackham, B. V., Mori, M., Baycroft, T., Benkhaldoun, Z., Burgasser, A. J., Caldwell, D. A., Collins, K. A., Davis, Y. T., Delrez, L., Demory, B.-O., Ducrot, E., Fukui, A., ... Zúñiga Fernández, S. G. (01 October 2023). An M dwarf accompanied by a close-in giant orbiter with SPECULOOS. Monthly Notices of the Royal Astronomical Society, 525, 98-L104. doi:10.1093/mnrasl/slad097

Barkaoui, K., Timmermans, M., Soubkiou, A., Rackham, B. V., Burgasser, A. J., Chouqar, J., Pozuelos, F. J., Collins, K. A., Howell, S. B., Simcoe, R., Melis, C., Stassun, K. G., Tregloan-Reed, J., Cointepas, M., Gillon, M., Bonfils, X., Furlan, E., Gnilka, C. L., Almenara, J. M., ... Zúñiga Fernández, S. G. (01 September 2023). TOI-2084 b and TOI-4184 b: Two new sub-Neptunes around M dwarf stars. Astronomy and Astrophysics, 677, 38. doi:10.1051/0004-6361/202346838

Pozuelos, F. J., Timmermans, M., Rackham, B. V., Garcia, L., Burgasser, A. J., Kane, S. R., Günther, M. N., Stassun, K. G., Van Grootel, V., Dévora-Pajares, M., Luque, R., Edwards, B., Niraula, P., Schanche, N., Wells, R. D., Ducrot, E., Howell, S., Sebastian, D., Barkaoui, K., ... Mancini, L. (01 April 2023). A super-Earth and a mini-Neptune near the 2:1 MMR straddling the radius valley around the nearby mid-M dwarf TOI-2096. Astronomy and Astrophysics, 672, 70. doi:10.1051/0004-6361/202245440

Delrez, L., Murray, C. A., Pozuelos, F. J., Narita, N., Ducrot, E., Timmermans, M., Watanabe, N., Burgasser, A. J., Hirano, T., Rackham, B. V., Stassun, K. G., Van Grootel, V., Aganze, C., Cointepas, M., Howell, S., Kaltenegger, L., Niraula, P., Sebastian, D., Almenara, J. M., ... Gillon, M. (November 2022). Two temperate super-Earths transiting a nearby late-type M dwarf. Astronomy and Astrophysics, 667, 59.

Poblete, P. P., Cuello, N., Perez, S., Marino, S., Calcino, J., MacÍas, E., Ribas, Á., Zurlo, A., Cuadra, J., Montesinos, M., Zúñiga Fernández, S. G., Bayo, A., Pinte, C., Menard, F., & Price, D. J. (February 2022). The protoplanetary disc around HD 169142: Circumstellar or circumbinary? Monthly Notices of the Royal Astronomical Society, 510 (1), 205 - 215. doi:10.1093/mnras/stab3474

Zúñiga Fernández, S. G., Olofsson, J., Bayo, A., Haubois, X., Corral-Santana, J. M., Lopera-Mejía, A., Ronco, M. P., Tokovinin, A., Gallenne, A., Kennedy, G. M., & Berger, J.-P. (November 2021). The HD 98800 quadruple pre-main sequence system: Towards full orbital characterisation using long-baseline infrared interferometry. Astronomy and Astrophysics, 655, 15. doi:10.1051/0004-6361/202141985

Zúñiga Fernández, S. G., Bayo, A., Elliott, P., Zamora, C., Corvalán, G., Haubois, X., Corral-Santana, J. M., Olofsson, J., Huélamo, N., Sterzik, M. F., Torres, C. A. O., Quast, G. R., & Melo, C. H. F. (2021). Search for associations containing young stars (SACY): VIII. An updated census of spectroscopic binary systems exhibiting hints of non-universal multiplicity among their associations. Astronomy and Astrophysics, 645, 30. doi:10.1051/0004-6361/202037830

Bayo, A., Mardones, P., Castillo, S., Hamilton, G., Lobos, C., Pedrero, L., Rozas, C., Soto, N., Hakobyan, H., Garcia, C., Schreiber, M. R., Brooks, W., & Zúñiga Fernández, S. G. (2020). NPF update: Light-weight mirror development in Chile. In R. Navarro (Ed.), Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV. International Society for Optical Engineering (SPIE). doi:10.1117/12.2562473

Soto, N., Lobos, C., Mardones, P., Bayo, A., Rozas, C., Castillo, S., Hamilton, G., Pedrero, L., Zúñiga Fernández, S. G., Mauco, K., Hakobyan, H., Garcia, C., Schreiber, M., & Brooks, W. (2020). Quality control of the CFRP mirror manufacturing process at NPF. In R. Navarro (Ed.), Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV. International Society for Optical Engineering (SPIE). doi:10.1117/12.2559755

Woillez, J., Abad, J. A., Abuter, R., Aller Carpentier, E., Alonso, J., Andolfato, L., Barriga, P., Berger, J.-P., Beuzit, J.-L., Bonnet, H., Bourdarot, G., Bourget, P., Brast, R., Caniguante, L., Cottalorda, E., Darré, P., Delabre, B., Delboulbé, A., Delplancke-Ströbele, F., ... Zúñiga Fernández, S. G. (September 2019). NAOMI: The adaptive optics system of the Auxiliary Telescopes of the VLTI. Astronomy and Astrophysics, 629, 41. doi:10.1051/0004-6361/201935890

Zúñiga Fernández, S. G., Bayo, A., Olofsson, J., Pedrero, L., Lobos, C., Rozas, E., Soto, N., Schreiber, M., Escárate, P., Romero, C., Hakobyan, H., Cuadra, J., Rozas, C., Monnier, J. D., Kraus, S., Ireland, M. J., & Mardones, P. (2018). NPF: Mirror development in Chile. In H. K. Marshall (Ed.), Ground-Based and Airborne Telescopes VII. International Society for Optical Engineering (SPIE). doi:10.1117/12.2313983

Zúñiga Fernández, S. G., Vučković, M., Vogt, N., Cuevas, O., & Chacon, Y. (2018). Revival of an abandoned telescope: The Boller and Chivens Bochum 0.61-metre telescope of Universidad de Valparaiso. In H. K. Marshall (Ed.), Ground-Based and Airborne Telescopes VII. International Society for Optical Engineering (SPIE). doi:10.1117/12.2314014

Escárate, P., Agüero, J. C., Zúñiga Fernández, S. G., Castro, M., & Garcés, J. (July 2017). Linear quadratic regulator for laser beam shaping. Optics and Lasers in Engineering, 94, 90 - 96. doi:10.1016/j.optlaseng.2017.02.009

Escarate, P., Aguero, J. C., Zúñiga Fernández, S. G., & Marchioni, J. (2017). Model predictive control for laser beam shaping. Revista IEEE América Latina, 15 (4), 626 - 631. doi:10.1109/TLA.2017.7896347

Zúñiga Fernández, S. G., Garcés, J., Males, J. R., Morzinski, K. M., Escárate, P., Castro, M., Marchioni, J., & Zagals, D. (2016). Vibrations in MagAO: Frequency-based analysis of on-sky data, resonance sources identification, and future challenges in vibrations mitigation. In E. Marchetti (Ed.), Adaptive Optics Systems V. International Society for Optical Engineering (SPIE). doi:10.1117/12.2232676

Castro, M., Escárate, P., Garcés, J., Zúñiga Fernández, S. G., Rojas, D., Marchioni, J., & Guesalaga, A. (2016). Closed-loop control for tip-Tilt compensation on systems under vibration. In E. Marchetti (Ed.), Adaptive Optics Systems V. International Society for Optical Engineering (SPIE). doi:10.1117/12.2232215

Escárate, P., Zúñiga Fernández, S. G., Castro, M., Garcés, J., Zagals, D., Marchioni, J., & Solar, M. (2016). Closed-loop control for laser beam shaping system before guide star projection. In E. Marchetti (Ed.), Adaptive Optics Systems V. International Society for Optical Engineering (SPIE). doi:10.1117/12.2233008

Garcés, J., Zúñiga Fernández, S. G., Close, L., Males, J., Morzinski, K., Escárate, P., Castro, M., Marchioni, J., & Rojas, D. (2016). Vibrations in MagAO: Resonance sources identification and first approaches for modeling and control. In E. Marchetti (Ed.), Adaptive Optics Systems V. International Society for Optical Engineering (SPIE). doi:10.1117/12.2232777

Castro, M., Escárate, P., Zúñiga Fernández, S. G., Garcés, J., & Guesalaga, A. (2015). Closed loop for tip-tilt vibration mitigation. In Adaptive Optics: Analysis, Methods and Systems, AO 2015. Optical Society of America (OSA). doi:10.1364/AOMS.2015.JT5A.28

Zúñiga Fernández, S. G., Garcés, J., Close, L. M., Males, J. R., Morzinski, K. M., Escárate, P., & Castro, M. (2015). Vibrations in MagAO: Analysis of on-sky data and future challenges in vibrations mitigation. In Adaptive Optics: Analysis, Methods and Systems, AO 2015. Optical Society of America (OSA). doi:10.1364/AOMS.2015.AOTh1D.4

Béchet, C., Guesalaga, A., Neichel, B., Fesquet, V., González-Núñez, H., Zúñiga Fernández, S. G., Escarate, P., & Guzman, D. (02 June 2014). Beam shaping for laser-based adaptive optics in astronomy. Optics Express, 22 (11), 12994 - 13013. doi:10.1364/OE.22.012994

Zúñiga Fernández, S. G., Béchet, C., González-Núñez, H., Neichel, B., Fesquet, V., Garrel, V., Escárate, P., Castro, M., Guzmán, D., & Guesalaga, A. (2014). Laboratory validation of a laser shaping system before guide star projection. In J.-P. Veran (Ed.), Adaptive Optics Systems IV. International Society for Optical Engineering (SPIE). doi:10.1117/12.2056062