Results 31 to 40 of about 130,291 (292)
Do stellar magnetic cycles influence the measurement of precise radial velocities?
, 2010 The ever increasing level of precision achieved by present and future radial-velocity instruments is opening the way to discovering very low-mass, long-period planets (e.g. solar-system analogs).
Boisse +47 more
core +1 more source
, 2012 Through the McDonald Observatory M Dwarf Planet Search, we have acquired nearly 3,000 high-resolution spectra of 93 late-type (K5-M5) stars over more than a decade using HET/HRS.
Cochran, William D. +3 more
core +1 more source
Magnetic activity in stellar merger products [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 We study the expected X-ray luminosity of stellar merger products several years after merger. The X-ray emission is assumed to result from magnetic activity. The extended envelope of the merger product possesses a large convective region and it is expected to rotate fast.
Soker, Noam, Tylenda, Romuald
openaire +2 more sources
Filamentary Electron-beam Heating in Solar Flares
The Astrophysical JournalRadiation-hydrodynamic simulations of the solar-flare chromospheric emission very often lead to an excess of the line intensities when compared to observations.
Michalina Litwicka +2 more
doaj +1 more source
Properties of PSR J1023+0038 Based on Kepler, TESS, and FAST
The Astrophysical Journal, 2023 The pulsar system PSR J1023+0038 is a very interesting binary with radio millisecond pulsar and low-mass X-ray binary transitions, which depend on the stellar accretion process. We have used Kepler light curves with 1 minute cadence and TESS light curves
Li-yun Zhang +6 more
doaj +1 more source
Can stellar activity make a planet seem misaligned?
, 2016 Several studies have shown that the occultation of stellar active regions by the transiting planet can generate anomalies in the high-precision transit light curves, and these anomalies may lead to an inaccurate estimate of the planetary parameters (e.g.,
Dreizler, S. +4 more
core +1 more source
STELLAR TRANSITS IN ACTIVE GALACTIC NUCLEI [PDF]
The Astrophysical Journal, 2012 Supermassive black holes (SMBH) are typically surrounded by a dense stellar population in galactic nuclei. Stars crossing the line of site in active galactic nuclei (AGN) produce a characteristic transit lightcurve, just like extrasolar planets do when they transit their host star. We examine the possibility of finding such AGN transits in deep optical,
Béky, Bence, Kocsis, Bence
openaire +2 more sources
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Oral mucositis is a common and debilitating side effect of childhood cancer and stem cell transplant treatments. It affects the quality of life of children and young people (CYP) and places a strain on services. Photobiomodulation is recommended for oral mucositis prevention in international guidance but is poorly implemented in UK ...
Claudia Heggie +4 more
wiley +1 more source
New Approach to Superflare Energy Determination
The Astrophysical Journal LettersWe present a new method for estimating the total energy radiated by stellar flares in broadband continua, which assumes a constant emitting area but incorporates a time-dependent temperature evolution.
P. Heinzel +3 more
doaj +1 more source
Sh2-205: II. Its quiescent stellar formation activity [PDF]
, 2009 We present a study of active stellar forming regions in the environs of the HII region Sh2-205. The analysis is based on data obtained from point source catalogues and images extracted from 2MASS, MSX, and IRAS surveys.
Alksnis +38 more
core +3 more sources