We report on the internal distribution of star formation efficiency in IRAS 08339+6517 (hereafter IRAS08), using $\sim$200~pc resolution CO(2-1) observations from NOEMA. The molecular gas depletion time changes by 2 orders-of-magnitude disk-like values outer parts to less than 10$^8$~yr inside half-light radius. This translates a per free-fall that also orders-of-magnitude, reaching 50-100\%, d...

We discuss the importance of multiring images in optical appearance a horizonless spherically symmetric compact object, when illuminated by an optically thin accretion disk. Such object corresponds to subcase analytically tractable extension Kerr solution dubbed as ``eye storm'' Simpson and Visser [J. Cosmol. Astropart. Phys. 03 (2022) 011], which merits removing curvature singularities via asy...

We use a 3D Monte Carlo radiative transfer code to study the projection of large shadows by circumstellar disks around young stellar objects on surrounding reflection nebulosity. It is shown that for a wide range of parameters a small (10−100 AU) circumstellar disk can project a large (1000−10 000 AU) dark band in the near-infrared that often resembles a massive edge-on disk. The disk shadows a...

We revisit theoretical and observational constraints on geometrically-thin disk accretion in SagittariusA (SgrA ). We show that the combined effects of mass outflows and electron energization in the hot part of the accretion flow can deflate the inflowing gas from a geometrically-thick structure. This allows the gas to cool and even thermalize on an inflow timescale. As a result, a compact, rel...

The article by Lindell et al 1 documenting the growth curves of 18 lung cancers that was recently published in CHEST patient, the decisions to initiate and terminate SUP should be considered carefully and individually. We wholly agree with Dr Porath that both initiation of SUP and its continuation beyond the ICU and the hospital require meticulous attention in order to minimize individual and p...

BACKGROUND There is a dearth of assessments of sign language development in young deaf children. This study gathered age-related scores from a sample of deaf native signing children using an adapted version of the MacArthur-Bates CDI (Fenson et al., 1994). METHOD Parental reports on children's receptive and expressive signing were collected longitudinally on 29 deaf native British Sign Langua...