Results 41 to 50 of about 24,390,120 (296)

HADES RV Programme with HARPS-N at TNG XII. The abundance signature of M dwarf stars with planets [PDF]

, 2020
Most of our current knowledge on planet formation is still based on the analysis of main-sequence, solar-type stars. Conversely, detailed chemical studies of large samples of M-dwarf planet hosts are still missing.
SOZZETTI, Alessandro, V. D'Orazi, G. Piotto, PINAMONTI, Matteo, M. Pinamonti, DESIDERA, Silvano, A. Suárez-Mascareño, Ribas, I., E. Poretti, D'ORAZI, VALENTINA, PETRALIA, Antonino, J. I. Gonz('(a))lez Hern('(a))ndez, BIAZZO, Katia, AFFER, Laura, E. Molinari, B. Toledo-Padr('(o))n, J. I. González Hernández, J. C. Morales, G. Micela, V. D’Orazi, A. F. Lanza, Perger, M., LANZA, Antonino Francesco, A. Maggio, A. Su('(a))rez-Mascare(\~(n))o, M. Baratella, Suárez-Mascareño, A., LOCCI, Daniele, M. Perger, SCANDARIATO, GAETANO, R. Rebolo, González Hernández, J. I., Herrero, E., COVINO, Elvira, Baratella, M., BIGNAMINI, ANDREA, MICELA, Giuseppina, C. Di Maio, MAGGIO, Antonio, K. Biazzo, B. Toledo-Padrón, S. Desidera, A. Bignamini, Toledo-Padrón, B., J. Maldonado, R. Claudi, E. Herrero, MALDONADO PRADO, Jesus, CLAUDI, Riccardo, E. Covino, A. Petralia, L. Affer, I. Ribas, DI MAIO, Claudia, Piotto, G., Morales, J. C., I. Pagano, A. Sozzetti, MOLINARI, Emilio Carlo, PAGANO, Isabella, G. Scandariato, Rebolo, R., D. Locci, Locci D., Suarez-Mascareno A., Scandariato G., Poretti E., Herrero, Enrique, Herrero E., Petralia A., Lanza A. F., Gonzalez Hernandez J. I., Affer L., Claudi R., Sozzetti A., Perger M., Morales, Juan Carlos, Molinari E., Covino E., Maldonado J., Maggio A., Biazzo K., Micela G., Poretti, Ennio, Rebolo R., Toledo-Padron B., Piotto G., Di Maio C., Baratella M., Pinamonti M., D'Orazi V., Bignamini A., Desidera S., Pagano I., Morales J. C., Maldonado, Jesús, Ribas I.   +96 more
core   +1 more source

Magnetic Field Measurements of Low-mass Stars from High-resolution Near-infrared IGRINS Spectra

The Astronomical Journal, 2023
We present average magnetic field measurements derived from high-resolution near-infrared IGRINS spectra of a carefully selected sample of 28 M dwarfs. All 28 have reported magnetic field strengths in the literature.
Eunkyu Han, Ricardo López-Valdivia, Gregory N. Mace, Daniel T. Jaffe   +3 more
doaj   +1 more source

Searching for Rotational and Activity Signals in M Dwarf Stars [PDF]

, 2017
We search for signals coming from M dwarf stars through variations caused by stellar surface activity. The aims of this work are to find the stellar rotation period of M dwarf stars and check them against known planetary signals. We used photometric ASAS
Zayer, Imad
core   +1 more source

Inhomogeneous structure in the chromospheres of dwarf M stars [PDF]

Monthly Notices of the Royal Astronomical Society, 1991
Linear combinations of observed spectra of the H-alpha and Ca-II resonance and IR lines from the chromospheres of a quiet (Gl 1) and an active (Gl 735) dwarf-M star are compared with the corresponding spectra from a star of intermediate activity (Gl 887).
N. J. Turner, L. E. Cram, R. D. Robinson
openaire   +1 more source

M dwarf stars in the light of (future) exoplanet searches

, 2013
We present a brief overview of a splinter session on M dwarf stars as planet hosts that was organized as part of the Cool Stars 17 conference. The session was devoted to reviewing our current knowledge of M dwarf stars and exoplanets in order to prepare ...
Helling, Ch., Hilton, E.~J., T.J. Henry, B. Rojas‐Ayala, X. Bonfils, A. Youdin, Rogers, L. A., Henry, T.~J., Rojas-Ayala, B., Lépine, S., Mann, A. W., Gaidos, E., Bonfils, X., E.J. Hilton, A.W. Mann, Hilton, E. J., L. A. Rogers, E. Gaidos, Ch. Helling, Rogers, L.~A., S. Lépine, Henry, T. J., Youdin, A., von Braun, K., K. von Braun, Mann, A.~W.   +25 more
core   +1 more source

Detection of Young Massive White Dwarfs in Core-collapsed Globular Cluster NGC 362

The Astrophysical Journal Letters
Core-collapsed globular clusters are ideal targets to explore the presence of stellar collision products. Here, we have studied 17 far-UV bright white dwarf (WD) members in the globular cluster NGC 362 using data obtained from the Ultra Violet Imaging ...
R. K. S. Yadav, Arvind K. Dattatrey, Annapurni Subramaniam, Geeta Rangwal, Ravi S. Singh   +4 more
doaj   +1 more source

High Resolution Near-Infrared Spectroscopy of Cool Dwarf Stars [PDF]

, 2018
We present results from a near infrared survey of the He I line (10830 Angstrom) in cool dwarf stars taken with the PHOENIX spectrograph at the 4-m Mayall telescope at Kitt Peak National Observatory. Spectral synthesis of this region reproduces some but
Dupree, Andrea, Brickhouse, Nancy, Irwin, Jonathan, Kurucz, Robert, Newton, Elisabeth   +4 more
core   +1 more source

Microbiome‐blood–brain barrier interactions in aging — mechanisms and therapeutic potential

FEBS Letters, EarlyView.
Aging reshapes the gut microbiome (↓SCFA‐producing commensals; ↑pro‐inflammatory outputs), shifting circulating metabolites (↓SCFAs; ↑LPS, ↑TMAO, ↑PAA) that act at the BBB to increase nonspecific transcytosis, alter transport, and promote astrocyte reactivity, heightening brain vulnerability.
Daniel Cuervo‐Zanatta, Hari Baskar Balasubramanian, Amir Pasokh, Marietta Zille   +3 more
wiley   +1 more source

Physical Parameters and Magnetic Activity of M-type Stars Based on the LAMOST DR9, SDSS, and TESS Surveys

The Astrophysical Journal Supplement Series
We analyze a catalog comprising 781,232 spectra from 641,095 M dwarf stars from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) low-resolution spectroscopic data release 9.
Wenjie Li, Li-yun Zhang, Tianhao Su, Xianming L. Han, Prabhakar Misra, Qingfeng Pi   +5 more
doaj   +1 more source

Comparative assessment of crystallographic and cryo‐EM models in the Protein Data Bank

FEBS Open Bio, EarlyView.
Raw data obtained by X‐ray crystallography or cryo‐EM result in experimental maps, ultimately fitted by atomic models. Although the physical principles are different, the final results can be viewed, compared, and evaluated in the same way. With cryogenic electron microscopy (cryo‐EM) on track to surpass X‐ray crystallography as the preferred method ...
Alexander Wlodawer, Pawel Rubach, Zbigniew Dauter, Wojciech Dec, Dariusz Brzezinski, Marta Kulik, Wladek Minor, Mariusz Jaskolski   +7 more
wiley   +1 more source