Results 131 to 140 of about 10,855,464 (193)

The Spectra and Classification of L and T Dwarfs

, 2001
In this contribution, I discuss some of the salient features of L and T dwarf spectra in both the red optical (6300--10000 Å) and near-infrared (1--2.5 $\micron$) wavelength regimes. Important absorption bands and lines, including those of H$_2$O, CH$_4$, FeH, CrH, CO, and the alkali metal lines, are identified, and the development of recent ...
openaire   +2 more sources

T DWARFS AND THE SUBSTELLAR MASS FUNCTION. I. MONTE CARLO SIMULATIONS

, 2003
Monte Carlo simulations of the field substellar mass function (MF) are presented, based on the latest brown dwarf evolutionary models from Burrows et al. and Baraffe et al.
Adam J. Burgasser
core  

Accretion in ρ Ophiuchus brown dwarfs: infrared hydrogen line ratios

, 2006
Context: .Mass accretion rate determinations are fundamental for an understanding of the evolution of pre-main sequence star circumstellar disks. Aims: .Magnetospheric accretion models are used to derive values of the mass accretion rates in objects of ...
Randich S, Gatti T, Natta A, Testi L, Muzerolle J   +4 more
core  

Subgiants in NGC 188 reveal that rotationally induced mixing creates the main sequence Li-Dip. [PDF]

Nat Commun
Sun Q, Deliyannis CP, Anthony-Twarog BJ, Twarog BA, Xu XT, Steinhauer A, King JR.   +6 more
europepmc   +1 more source

Entropy Production During Star Formation: An Analytic Thermodynamic Framework from the Main Sequence to Compact Remnants. [PDF]

Entropy (Basel)
Martín-Torres J, Zorzano MP.
europepmc   +1 more source

Analysis of the fractional relativistic polytropic gas sphere. [PDF]

Sci Rep, 2023
Aboueisha MS, Nouh MI, Abdel-Salam EA, Kamel TM, Beheary MM, Gadallah KAK.   +5 more
europepmc   +1 more source

The emergence of globular clusters and globular-cluster-like dwarfs. [PDF]

Nature
Taylor ED, Read JI, Orkney MDA, Kim SY, Pontzen A, Agertz O, Rey MP, Andersson EP, Collins MLM, Yates RM.   +9 more
europepmc   +1 more source

B-type host stars revealed by exoplanets around massive secondary-clump giant stars. [PDF]

Nat Commun
Lin WX, Qian SB, Sun QB, Zhu LY, Liao WP, Li T, Li FX, Liu L, Shi XD, Li L, Zhao E, Zhang H, Li P, Li J, Lian M.   +14 more
europepmc   +1 more source

Exploring the sub-Neptune frontier with JWST. [PDF]

Proc Natl Acad Sci U S A
Madhusudhan N, Holmberg M, Constantinou S, Cooke GJ.   +3 more
europepmc   +1 more source

Starspots as the origin of ultrafast drifting radio bursts from an active M dwarf. [PDF]

Sci Adv
Zhang J, Tian H, Bellotti S, Cang T, Callingham JR, Vedantham HK, Chen B, Yu S, Zarka P, Louis CK, Jiang P, Lu H, Gao Y, Sun J, Gan H, Li H, Sun C, Lei Z, Huang M.   +18 more
europepmc   +1 more source