Results 21 to 30 of about 94,786 (300)

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 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
core   +3 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

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

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

Global trends in winds of M dwarf stars [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT M dwarf stars are currently the main targets in searches for potentially habitable planets. However, their winds have been suggested to be harmful to planetary atmospheres. Here, in order to better understand the winds of M dwarfs and also infer their physical properties, we perform a one-dimensional magnetohydrodynamic ...
A A Vidotto, A L Mesquita
openaire   +2 more sources

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

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

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

Metallicities of M Dwarf Planet Hosts from Spectral Synthesis [PDF]

, 2006
We present the first spectroscopic metallicities of three M dwarfs with known or candidate planetary mass companions. We have analyzed high resolution, high signal-to-noise spectra of these stars which we obtained at McDonald Observatory.
Delfosse X., Delfosse X., Fuhrmann K., Fuhrmann K., G. Fritz Benedict, Gonzalez G., Gonzalez G., Jacob L. Bean, Michael Endl, Perryman M. A. C., Santos N. C.   +10 more
core   +3 more sources