Results 91 to 100 of about 23,116,162 (197)

Searching for GEMS: Discovery of the Nearby Post-common-envelope Binary System TIC-460388167

The Astrophysical Journal
Short-period white dwarf + main-sequence binaries are post-common-envelope binaries (PCEBs) that have survived a common envelope phase. Such systems, if detached and eclipsing, enable precise measurements of the constituent stars, providing a unique ...
Alexandra Boone, Henry A. Kobulnicky, Caleb I. Cañas, Shubham Kanodia, Andrew Monson, Peter Shea, William Cochran, Suvrath Mahadevan, Joe Ninan, Paul Robertson, Te Han, Arpita Roy, Christian Schwab, Madeleine Allen   +13 more
doaj   +1 more source

TESS Observations of Outbursts on Polars—Superflares

The Astrophysical Journal
Flare events are magnetic activities on the stellar surface, which can provide us with information about the accretion behavior and evolution of polars. In this paper, we search for flare events on polars from all the available 2 minute cadence TESS data
Qishan Wang, Xiaohui Fang, Shengbang Qian   +2 more
doaj   +1 more source

Transcriptomic and photosynthetic analyses of Synechocystis sp. PCC6803 and Chlorogloeopsis fritschii sp. PCC6912 exposed to an M-dwarf spectrum under an anoxic atmosphere

Frontiers in Plant Science
IntroductionCyanobacteria appeared in the anoxic Archean Earth, evolving for the first time oxygenic photosynthesis and deeply changing the atmosphere by introducing oxygen.
Mariano Battistuzzi, Mariano Battistuzzi, Mariano Battistuzzi, Maria Silvia Morlino, Lorenzo Cocola, Livio Trainotti, Laura Treu, Stefano Campanaro, Riccardo Claudi, Riccardo Claudi, Luca Poletto, Nicoletta La Rocca, Nicoletta La Rocca   +12 more
doaj   +1 more source

Detailed chemical analysis of M dwarf stars [PDF]

, 2019
M dwarf stars are the most abundant stars in the Galaxy and appear to host the vast majority of temperate, Earth-sized planets. Investigations into their detailed compositions are important for inferring the chemical evolution of the Galaxy and for ...
Veyette, Mark Joseph
core   +1 more source

The Close Binary Fraction of Dwarf M Stars [PDF]

, 2012
We describe a search for close spectroscopic dwarf M star binaries using data from the Sloan Digital Sky Survey to address the question of the rate of occurrence of multiplicity in M dwarfs.
Clark, Benjamin M., Blake, Cullen H., Knapp, Gillian R.   +2 more
core  

M dwarf planetary systems: an observational study to look for prolonged activity in host stars

, 2018
M dwarf stars begin their lives rapidly rotating and with high levels of activity, but as time goes on, they slow down via magnetically channelled winds, whilst their activity decreases.
Roberto Raddi, Neil Cook, Avril Day-Jones, Federico Marocco, Elena González Egea (5572295), Roberto Raddi (5572304), David Pinfield, David Pinfield (5572298), Federico Marocco (5572301), Avril Day-Jones (5572307), Elena González Egea, Neil Cook (3437450)   +11 more
core   +1 more source

Variable stars in Fornax dwarf spheroidal galaxy

, 2005
We present the first results of a variable star search in the field and in the globular clusters of the Fornax dwarf spheroidal galaxy. Variable stars were identified using the Image Subtraction Technique (Alard 2000) on time-series data obtained with ...
Rizzi, L., Catelan, Marcio, Pritzl, B. J., Held, E. V., Gullieuszik, M., Greco, C., Poretti, E., Dell'Arciprete, L., Clementini, G., Maio, M., Smith, H. A., Rest, A., De Lee, N.   +12 more
core   +1 more source

A radio-continuum and photoionization-model study of the two planetary nebulae in the Sagittarius dwarf galaxy [PDF]

, 2000
Radio continuum observations at 1.4, 4.8 and 8.6 GHz of the two Planetary Nebulae (PNe) in the Sagittarius dwarf galaxy reveal the elongated shape ofWray 16-423 and the extreme compactness of He 2-436.
Dudziak, G., Zijlstra, A.A., Walsh, J.R., Pequignot, D.   +3 more
core   +2 more sources

White Dwarf Stars

, 2017
White dwarf stars are the final stage of most stars, born single or in multiple systems. We discuss the identification, magnetic fields, and mass distribution for white dwarfs detected from spectra obtained by the Sloan Digital Sky Survey up to Data ...
S. O. Kepler, Ingrid Pelisoli, Gustavo Ourique, Alejandra Daniela Romero   +3 more
core   +1 more source

Magnetic activity of M dwarf stars from the LAMOST DR10 medium-resolution survey

Aims. M dwarf stars (red dwarfs) are the most common stars in the Milky Way (70% of all stars). Their temperatures and masses are low, but their magnetic activity is strong and includes flares, starspots, and coronal mass ejections.
Liyun Zhang, Prabhakar Misra, Tianhao Su, Yinpeng Wang, Wenjie Li, Xianming L. Han   +5 more
core   +1 more source