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Ionized and Atomic Interstellar Medium in the z = 6.003 Quasar SDSS J2310+1855
Fan, Xiaohui; Neri, Roberto; Menten, Karl M. +13 more
Observing the interstellar medium (ISM) in the z ≳ 6 quasar host galaxies is essential for understanding the coevolution between supermassive black holes and their hosts. To probe the gas physical conditions and search for imprints of active galactic nuclei (AGNs) on the ISM, we report ALMA observations of the [N II]122 µm and [O …
Exploring the Origin of Moving Groups and Diagonal Ridges by Simulations of Stellar Orbits and Birthplaces
Pérez-Villegas, Angeles; Barros, Douglas A.; Michtchenko, Tatiana A. +2 more
The present paper is the culmination of a series aimed at contributing to the understanding of the kinematic structures of the solar neighborhood (SN), explaining the origin of the Local Arm, and relating the moving groups with the spiral-arms resonances in the disk. With a model for the Galactic potential, with the Sun inside the spiral corotatio…
Balmer Break Galaxy Candidates at z ∼ 6: A Potential View on the Star Formation Activity at z ≳ 14
Ono, Yoshiaki; Fujimoto, Seiji; Harikane, Yuichi +15 more
We search for galaxies with a strong Balmer break (Balmer break galaxies; BBGs) at z ∼ 6 over a 0.41 deg2 effective area in the COSMOS field. Based on rich imaging data, including data obtained with the Atacama Large Millimeter/submillimeter Array (ALMA), three candidates are identified by their extremely red K-[3.6] colors, as well as …
On the Radial and Longitudinal Variation of a Magnetic Cloud: ACE, Wind, ARTEMIS and Juno Observations
Davies, Emma E.; Kilpua, Emilia K. J.; Forsyth, Robert J. +1 more
We present observations of the same magnetic cloud made near Earth by the Advance Composition Explorer (ACE), Wind, and the Acceleration, Reconnection, Turbulence and Electrodynamics of the Moon's Interaction with the Sun (ARTEMIS) mission comprising the Time History of Events and Macroscale Interactions during Substorms (THEMIS) B and THEMIS C sp…
A detailed non-LTE analysis of LB-1: Revised parameters and surface abundances
Allende Prieto, C.; Smartt, S. J.; Dufton, P. L. +8 more
Context. It has recently been proposed that LB-1 is a binary system at 4 kpc consisting of a B-type star of 8 M⊙ and a massive stellar black hole (BH) of 70 M⊙. This finding challenges our current theories of massive star evolution and formation of BHs at solar metallicity.
Aims: Our objective is to derive the effective …
Observations of the 2019 April 4 Solar Energetic Particle Event at the Parker Solar Probe
Krimigis, S. M.; Mitchell, D. G.; McComas, D. J. +33 more
A solar energetic particle event was detected by the Integrated Science Investigation of the Sun (IS⊙IS) instrument suite on Parker Solar Probe (PSP) on 2019 April 4 when the spacecraft was inside of 0.17 au and less than 1 day before its second perihelion, providing an opportunity to study solar particle acceleration and transport unprecedentedly…
Recipes for bolometric corrections and Gaia luminosities of B-type stars: application to an asteroseismic sample
Aerts, Conny; Escorza, Ana; Pedersen, May G. +1 more
We provide three statistical model prescriptions for the bolometric corrections appropriate for B-type stars as a function of (I) Teff, (II) Teff and log g, and (III)Teff, log g and [M/H]. These statistical models have been calculated for 27 different filters, including those of the Gaia space mission, and were der…
From Nuclear to Circumgalactic: Zooming in on AGN-driven Outflows at z ∼ 2.2 with SINFONI
Lutz, D.; Wuyts, S.; Förster Schreiber, N. M. +16 more
We use deep adaptive optics assisted integral field spectroscopy from SINFONI on the VLT to study the spatially resolved properties of ionized gas outflows driven by active galactic nuclei (AGNs) in three galaxies at z ∼ 2.2—K20-ID5, COS4-11337, and J0901 + 1814. These systems probe AGN feedback from nuclear to circumgalactic scales and provide un…
Classifying Single Stars and Spectroscopic Binaries Using Optical Stellar Templates
Roulston, Benjamin R.; Green, Paul J.; Kesseli, Aurora Y.
Stellar spectral classification is a fundamental tool of modern astronomy, providing insight into physical characteristics such as effective temperature, surface gravity, and metallicity. Accurate and fast spectral typing is an integral need for large all-sky spectroscopic surveys like the Sloan Digital Sky Survey (SDSS) and the Large Sky Area Mul…
Evolved massive stars at low metallicity. II. Red supergiant stars in the Small Magellanic Cloud
Yang, Ming; Bonanos, Alceste Z.; Jiang, Bi-Wei +9 more
We present the most comprehensive red supergiant (RSG) sample for the Small Magellanic Cloud (SMC) to date, including 1239 RSG candidates. The initial sample was derived based on a source catalog for the SMC with conservative ranking. Additional spectroscopic RSGs were retrieved from the literature, and RSG candidates were selected based on the in…