Results 11 to 20 of about 94,613 (301)

The habitability of planets orbiting M-dwarf stars

Physics Reports, 2016
The prospects for the habitability of M-dwarf planets have long been debated, due to key differences between the unique stellar and planetary environments around these low-mass stars, as compared to hotter, more luminous Sun-like stars. Over the past decade, significant progress has been made by both space- and ground-based observatories to measure the
Aomawa L. Shields, Sarah Ballard, John Asher Johnson   +2 more
openaire   +7 more sources

Robo-AO M-dwarf Multiplicity Survey: Catalog [PDF]

, 2020
We analyze observations from Robo-AO's field M dwarf survey taken on the 2.1 m Kitt Peak telescope and perform a multiplicity comparison with Gaia DR2.
Baranec, Christoph, Berta-Thompson, Zachory K., Duev, Dmitry A., Irwin, Jonathan M., Jensen-Clem, Rebecca, Kulkarni, Shrinivas R., Lamman, Claire, Law, Nicholas M., Riddle, Reed, Salama, Maïssa, Schonhut-Stasik, Jessica, Winters, Jennifer G., Ziegler, Carl   +12 more
core   +3 more sources

The Chromospheric Activity and Ages of M Dwarf Stars in Wide Binary Systems [PDF]

, 2005
We investigate the relationship between age and chromospheric activity for 139 M dwarf stars in wide binary systems with white dwarf companions. The age of each system is determined from the cooling age of its white dwarf component. The current limit for
Abt H. A., Boss A. P., Byrne P. B., Byrne P. B., Delfosse X., Giclas H. L., Nicole M. Silvestri, Pettersen B. R., Pringle J. E., Reid I. N., Suzanne L. Hawley, Terry D. Oswalt, Weidemann V.   +12 more
core   +4 more sources

TOI 4201 b and TOI 5344 b: Discovery of Two Transiting Giant Planets around M-dwarf Stars and Revised Parameters for Three Others

The Astronomical Journal, 2023
We present the discovery from the TESS mission of two giant planets transiting M-dwarf stars: TOI 4201 b and TOI 5344 b. We also provide precise radial velocity measurements and updated system parameters for three other M dwarfs with transiting giant ...
J. D. Hartman, G. Á. Bakos, Z. Csubry, A. W. Howard, H. Isaacson, S. Giacalone, A. Chontos, N. Narita, A. Fukui, J. P. de Leon, N. Watanabe, M. Mori, T. Kagetani, I. Fukuda, Y. Kawai, M. Ikoma, E. Palle, F. Murgas, E. Esparza-Borges, H. Parviainen, L. G. Bouma, M. Cointepas, X. Bonfils, J. M. Almenara, Karen A. Collins, Kevin I. Collins, Howard M. Relles, Khalid Barkaoui, Richard P. Schwarz, Ghachoui Mourad, Mathilde Timmermans, Georgina Dransfield, Artem Burdanov, Julien de Wit, Emmanuël Jehin, Amaury H. M. J. Triaud, Michaël Gillon, Zouhair Benkhaldoun, Keith Horne, Ramotholo Sefako, A. Jordán, R. Brahm, V. Suc, Steve B. Howell, E. Furlan, J. E. Schlieder, D. Ciardi, T. Barclay, E. J. Gonzales, I. Crossfield, C. D. Dressing, M. Goliguzova, A. Tatarnikov, George R. Ricker, Roland Vanderspek, David W. Latham, S. Seager, Joshua N. Winn, Jon M. Jenkins, Stephanie Striegel, Avi Shporer, Andrew Vanderburg, Alan M. Levine, Veselin B. Kostov, David Watanabe   +64 more
doaj   +1 more source

The M Dwarf Problem in the Galaxy [PDF]

, 2012
We present evidence that there is an M dwarf problem similar to the previously identified G dwarf and K dwarf problems: the number of low-metallicity M dwarfs is not sufficient to match simple closed-box models of local Galactic chemical evolution.
Adelman-McCarthy, Ake, Allende, Andrew A. West, Audouze, Bochanski, Bochanski, Bochanski, Caimmi, Carigi, Casuso, Covey, Davenport, Favata, Gizis, Hauschildt, Holmberg, Ivezić, Jurić, Jørgensen, Luck, Lépine, Lépine, Malinie, Martinelli, Mould, Mould, Nordström, Pagel, Reid, Reiz, Rocha-Pinto, Rocha-Pinto, Romano, Schmidt, Tinsley, van den Bergh, Vincent M. Woolf, West, West, West, Woolf, Woolf, Woolf, Worthey, Worthey, Wyse, York   +47 more
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Statistical Signatures of Nanoflare Activity. III. Evidence of Enhanced Nanoflaring Rates in Fully Convective stars as Observed by the NGTS

The Astrophysical Journal, 2023
Previous examinations of fully convective M-dwarf stars have highlighted enhanced rates of nanoflare activity on these distant stellar sources. However, the specific role the convective boundary, which is believed to be present for spectral types earlier
S. D. T. Grant, D. B. Jess, C. J. Dillon, M. Mathioudakis, C. A. Watson, J. A. G. Jackman, D. G. Jackson, P. J. Wheatley, M. R. Goad, S. L. Casewell, D. R. Anderson, M. R. Burleigh, R. G. West, J. I. Vines   +13 more
doaj   +1 more source

Detached white-dwarf close-binary stars -- CV's extended family [PDF]

, 1999
I review detached binaries consisting of white dwarfs with either other white dwarfs or low mass main-sequence stars in tight orbits around them. Orbital periods have been measured for 15 white dwarf/white dwarf systems and 22 white dwarf/M dwarf systems.
Marsh, T. R.
core   +3 more sources

Living with a Red Dwarf: X-Ray, UV, and Ca ii Activity–Age Relationships of M Dwarfs

The Astrophysical Journal, 2023
The vast majority of stars in the nearby stellar neighborhood are M dwarfs. Their low masses and luminosities result in slow rates of nuclear evolution and minimal changes to the stars’ observable properties, even along astronomical timescales.
Scott G. Engle
doaj   +1 more source

Prospecting in ultracool dwarfs : Measuring the metallicities of mid- and late-m dwarfs [PDF]

, 2014
© 2014. The American Astronomical Society. All rights reserved.Metallicity is a fundamental parameter that contributes to the physical characteristics of a star.
Aihara, Allen, Andrew W. Mann, Bayless, Bochanski, Bowler, Boyajian, Caballero, Chanamé, Ciddor, Costa, Covey, Cruz, Cushing, Deacon, Deacon, Delfosse, Demarque, Dhital, Dittmann, Donati, Dupuy, Eric Gaidos, Eugene A. Magnier, Faherty, Fischer, Gaidos, Gizis, Gould, Henry, Jao, John M. Brewer, Johnson, Johnson, Kaiser, Kimberly M. Aller, Kopparapu, Kraus, Law, Lee, Luhman, Lépine, Lépine, Lépine, Lépine, Lépine, Mahadevan, Mann, Mann, Mann, Mann, Markwardt, Martín, Megan Ansdell, Michael C. Liu, Newton, Niall R. Deacon, Pinsonneault, Quirrenbach, Raghavan, Rayner, Rojas-Ayala, Rojas-Ayala, Skrutskie, Sneden, Sozzetti, Terrien, Tokovinin, Torres, Valenti, Valenti, West, West   +72 more
core   +5 more sources

WTS: A near-infrared transit survey

EPJ Web of Conferences, 2013
The WFCAM Transit Survey is a transiting planet survey running on the United Kingdom Infrared Telescope targeting M dwarf stars in the near infrared. The survey has been operating since 2007 and gathering photometric time series of about 15000 M dwarf ...
Hodgkin Simon, Kovács Gábor, Sipőcz Brigitta, Pinfield David   +3 more
doaj   +1 more source