VaTEST. II. Statistical Validation of 11 TESS-detected Exoplanets Orbiting K-type Stars by Priyashkumar Mistry, Kamlesh Pathak, Aniket Prasad, Georgios Lekkas, Surendra Bhattarai, Sarvesh Gharat, Mousam Maity, Dhruv Kumar, Karen A. Collins, Richard P. Schwarz, Christopher R. Mann, Elise Furlan, Steve B. Howell, David Ciardi, Allyson Bieryla, Elisabeth C. Matthews, Erica Gonzales, Carl Ziegler, Ian Crossfield, Steven Giacalone, Thiam-Guan Tan, Phil Evans, Krzysztof G. Hełminiak, Kevin I. Collins, Norio Narita, Akihiko Fukui, Francisco J. Pozuelos, Courtney Dressing, Abderahmane Soubkiou, Zouhair Benkhaldoun, Joshua E. Schlieder, Olga Suarez, Khalid Barkaoui, Enric Palle, Felipe Murgas, Gregor Srdoc, Maria V. Goliguzova, Ivan A. Strakhov, Crystal Gnilka, Kathryn Lester, Colin Littlefield, Nic Scott, Rachel Matson, Michaël Gillon, Emmanuel Jehin, Mathilde Timmermans, Mourad Ghachoui, Lyu Abe, Philippe Bendjoya, Tristan Guillot, Amaury H. M. J. Triaud

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HD 207897 b: A dense sub-Neptune transiting a nearby and bright K-type star by Seager, Sara

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TOI-2525 b and c: A Pair of Massive Warm Giant Planets with Strong Transit Timing Variations Revealed by TESS by Trifon Trifonov, Rafael Brahm, Andrés Jordán, Christian Hartogh, Thomas Henning, Melissa J. Hobson, Martin Schlecker, Saburo Howard, Finja Reichardt, Nestor Espinoza, Man Hoi Lee, David Nesvorny, Felipe I. Rojas, Khalid Barkaoui, Diana Kossakowski, Gavin Boyle, Stefan Dreizler, Martin Kürster, René Heller, Tristan Guillot, Amaury H. M. J. Triaud, Lyu Abe, Abdelkrim Agabi, Philippe Bendjoya, Nicolas Crouzet, Georgina Dransfield, Thomas Gasparetto, Maximilian N. Günther, Wenceslas Marie-Sainte, Djamel Mékarnia, Olga Suarez, Johanna Teske, R. Paul Butler, Jeffrey D. Crane, Stephen Shectman, George R. Ricker, Avi Shporer, Roland Vanderspek, Jon M. Jenkins, Bill Wohler, Karen A. Collins, Kevin I. Collins, David R. Ciardi, Thomas Barclay, Ismael Mireles, Sara Seager, Joshua N. Winn

“…The K-type star TOI-2525 has an estimated mass of M = ${0.849}_{-0.033}^{+0.024}$ M _⊙ and radius of R = ${0.785}_{-0.007}^{+0.007}$ R _⊙ observed by the TESS mission in 22 sectors (within sectors 1 and 39). …”
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Sliced Inverse Regression: application to fundamental stellar parameters by Kassounian Sarkis, Gebran Marwan, Paletou Frédéric, Watson Victor

“…It is based on a regularized sliced inverse regression (RSIR).We first tested it on noisy synthetic spectra of A, F, G, and K-type stars, and inverted simultaneously their atmospheric fundamental parameters: Teff., log g, [M/H] and v sin i. …”
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Relative Abundances of CO2, CO, and CH4 in Atmospheres of Earth-like Lifeless Planets by Yasuto Watanabe, Kazumi Ozaki

“…Our findings indicate that the gap structure is a general feature of Earth-like lifeless planets with reducing atmospheres orbiting Sun-like (F-, G-, and K-type) stars.…”
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The Belgian Repository of Fundamental Atomic Data and Stellar Spectra (BRASS) Identifying Fruitful Methods for Producing Atomic Data by Mike Laverick, Alex Lobel, Pierre Royer, Christophe Martayan, Thibault Merle, Peter A. M. van Hoof, Mathieu Van de Swaelmen, Marc David, Herman Hensberge, Emmanuel Thienpont

“…In addition to quality-assessed atomic data, BRASS shall also provide of a range of extremely high-quality benchmark stellar spectra spanning late B-type stars to early K-type stars. In this paper, we summarise the project’s progress and available results to-date. …”
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Galactic kinematics with RAVE data by Veltz, L, Bienaymé, O, Freeman, K, Binney, J, Bland-Hawthorn, J, Gibson, B, Gilmore, G, Grebel, E, Helmi, A, Munari, U, Navarro, J, Parker, Q, Seabroke, G, Siebert, A, Steinmetz, M, Watson, F, Williams, M, Wyse, R, Zwitter, T

“…We analyze the distribution of G and K type stars towards the Galactic poles using RAVE and ELODIE radial velocities, 2MASS photometric star counts, and UCAC2 proper motions. …”

Galactic kinematics with RAVE data: I. The distribution of stars towards the Galactic poles by Veltz, L, Bienaymé, O, Freeman, K, Binney, J, Bland-Hawthorn, J, Gibson, B, Gilmore, G, Grebel, E, Helmi, A, Munari, U, Navarro, J, Parker, Q, Seabroke, G, Siebert, A, Steinmetz, M, Watson, F, Williams, M, Wyse, R, Zwitter, T

“…We analyze the distribution of G and K type stars towards the Galactic poles using RAVE and ELODIE radial velocities, 2MASS photometric star counts, and UCAC2 proper motions. …”

Molybdenum abundance in some open clusters by E. Shereta, G. Carraro, T. Gorbaneva, T. Mishenina

“…This paper presents the results of determination of the molybdenum abundances in 13 G, K type stars in the open clusters NGC 2477 and NGC 2506. …”
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Low-amplitude Solar-like Oscillations in the K5 V Star ϵ Indi A by Mia S. Lundkvist, Hans Kjeldsen, Timothy R. Bedding, Mark J. McCaughrean, R. Paul Butler, Ditte Slumstrup, Tiago L. Campante, Conny Aerts, Torben Arentoft, Hans Bruntt, Cátia V. Cardoso, Fabien Carrier, Laird M. Close, João Gomes da Silva, Thomas Kallinger, Robert R. King, Yaguang Li, Simon J. Murphy, Jakob L. Rørsted, Dennis Stello

“…Overall, this work confirms that low-amplitude solar-like oscillations can be detected in mid-K-type stars in radial velocity measurements obtained with high-precision spectrographs.…”
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Beyond the Drake Equation: A Time-dependent Inventory of Habitable Planets and Life-bearing Worlds in the Solar Neighborhood by Piero Madau

“…Our results are summarized as follows: (1) the formation of exoplanets in the solar vicinity was episodic, starting with the emergence of the thick disk about 11 Gyr ago; (2) within 100 pc from the Sun, there are as many as 11,000( η _⊕ /0.24) Earth-size planets in the habitable zone (“temperate terrestrial planets” or TTPs) of K-type stars. The solar system is younger than the median TTP, and was created in a star formation surge that peaked 5.5 Gyr ago and was triggered by an external agent; (3) the metallicity modulation of the giant planet occurrence rate results in a later typical formation time, with TTPs outnumbering giant planets at early times; and (4) the closest, life-harboring Earth-like planet would be ≲20 pc away if microbial life arose as soon as it did on Earth in ≳1% of the TTPs around K stars. …”
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Oxygen False Positives on Habitable Zone Planets Around Sun‐Like Stars by Joshua Krissansen‐Totton, Jonathan J. Fortney, Francis Nimmo, Nicholas Wogan

“…In contrast, abiotic oxygen accumulation on planets around F, G, and K‐type stars is seemingly less likely, provided they possess substantial non‐condensable gas inventories. …”
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