Search Publications
Missions
Journals
Publication Years
Have we seen all the galaxies that comprise the cosmic infrared background at 250 µm ≤ λ ≤ 500 µm?
Ivison, R. J.; Clements, D. L.; Lagache, G. +11 more
The cosmic infrared background (CIB) provides a fundamental observational constraint on the star formation history of galaxies over cosmic history. We estimate the contribution to the CIB from catalogued galaxies in the COSMOS field by using a novel map fitting technique on the Herschel SPIRE maps. Prior galaxy positions are obtained using detecti…
Whether Small Flux Ropes and Magnetic Clouds Have the Same Origin: A Statistical Study of Small Flux Ropes in Different Types of Solar Wind
Wang, Yuming; Shen, Chenglong; Hu, Qiang +2 more
According to the duration and size, magnetic flux ropes can be divided into large-scale flux ropes, namely, magnetic clouds, and small-scale flux ropes (SFRs). Whether SFRs have the same origin as magnetic clouds has been a hot topic for a long time. Based on the SFR database developed by Hu et al. and Chen et al., this paper analyzes the properti…
The TRENDS High-contrast Imaging Survey. VIII. Compendium of Benchmark Objects
Howard, Andrew W.; Crepp, Justin R.; Montet, Benjamin T. +5 more
The physical properties of faint stellar and substellar objects often rely on indirect, model-dependent estimates. For example, the masses of brown dwarfs are usually inferred using evolutionary models, which are age dependent and have yet to be properly calibrated. With the goal of identifying new benchmark objects to test low-mass stellar and su…
The initial mass function in the extended ultraviolet disc of M83
Rich, R. Michael; Thilker, David A.; Bianchi, Luciana +7 more
Using Hubble Space Telescope ACS/WFC data we present the photometry and spatial distribution of resolved stellar populations of four fields within the extended ultraviolet disc (XUV disc) of M83. These observations show a clumpy distribution of main-sequence stars and a mostly smooth distribution of red giant branch stars. We constrain the upper e…
Study of the Galactic Rotation Based on Masers and Radio Stars with VLBI Measurements of Their Parallaxes
Bobylev, V. V.; Bajkova, A. T.; Krisanova, O. I.
Based on published data, we have produced a sample of 256 radio sources whose trigonometric parallaxes and proper motions were measured by VLBI. This sample contains Galactic masers associated with massive protostars and stars in active star-forming regions. It also includes young low-mass stars from the Gould Belt region whose radio observations …
Singing Comet Waves in a Solar Wind Convective Electric Field Frame
Goetz, C.; Taylor, M. G. G. T.; Plaschke, F.
The cometary plasma environment at low gas production rates is dominated by highly compressional, large-amplitude magnetic field waves in the 10-100 mHz range. They are thought to be caused by an ion-Weibel instability due to a cross-field current, which is caused by the cometary ions that are accelerated along the solar wind convective electric f…
Derivation of parameters for 3748 FGK stars using H-band spectra from APOGEE Data Release 14
Rojas-Ayala, Bárbara; Delgado Mena, Elisa; Blanco-Cuaresma, Sergi +1 more
Context. The Apache Point Observatory Galactic Evolution Experiment (APOGEE) has observed the H-band spectra of over 200 000 stars with R ∼ 22 000.
Aims: The main motivation for this work is to test an alternative method to the standard APOGEE pipeline (APOGEE Stellar Parameter and Chemical Abundances Pipeline, ASPCAP) to derive parameters in…
No universal connection between the vertical magnetic field and the umbra-penumbra boundary in sunspots
Solanki, S. K.; Lagg, A.; Löptien, B. +1 more
Context. It has been reported that the boundary between the umbra and the penumbra of sunspots occurs at a canonical value of the strength of the vertical magnetic field, independently of the size of the spot. This critical field strength is interpreted to be the threshold for the onset of magnetoconvection.
Aims: Here we investigate the reas…
Physical properties of the fluorine and neutron-capture element-rich PN Jonckheere 900
Otsuka, Masaaki; Hyung, Siek
We performed detailed spectroscopic analyses of a young C-rich planetary nebula (PN) Jonckheere 900 (J900) in order to characterize the properties of the central star and nebula. Of the derived 17 elemental abundances, we present the first determination of eight elemental abundances. We present the first detection of the [F IV] 4059.9 Å, [F V] 13.…
Spatially Resolved UV Diagnostics of AGN Feedback: Radiation Pressure Dominates in a Prototypical Quasar-driven Superwind
Stern, Jonathan; Johnson, Sean D.; Chen, Hsiao-Wen +5 more
Galactic-scale winds driven by active galactic nuclei (AGN) are often invoked to suppress star formation in galaxy evolution models, but the mechanisms driving these outflows are hotly debated. Two key AGN feedback models are (1) radiation pressure accelerating cool gas and (2) a hot outflowing wind entraining the interstellar medium (ISM). Highly…