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The local vertical density distribution of ultracool dwarfs M7 to L2.5 and their luminosity function
Warren, Stephen J.; Ahmed, Saad; Laithwaite, Richard C.
We investigate the form of the local vertical density profile of the stars in the Galactic disk, close to the Galactic plane. We use a homogeneous sample of 34000 ultracool dwarfs M7 to L2.5 that all lie within 350 pc of the plane. We fit a profile of the form sech$^\alpha$, where $\alpha=2$ is the theoretically preferred isothermal profile and $\…
Interplanetary Dust as a Foreground for the LiteBIRD CMB Satellite Mission
Ganga, Ken; Remazeilles, Mathieu; Maris, Michele +1 more
As ever-more sensitive experiments are made in the quest for primordial CMB B Modes, the number of potentially significant astrophysical contaminants becomes larger as well. Thermal emission from interplanetary dust, for example, has been detected by the Planck satellite. While the polarization fraction of this Zodiacal, or interplanetary dust emi…