Search Publications
Correlation between the Total Gravitating Mass of Groups and Clusters and the Supermassive Black Hole Mass of Brightest Galaxies
Lovisari, Lorenzo; Volonteri, Marta; Bogdán, Ákos +1 more
Supermassive black holes (BHs) residing in the brightest cluster galaxies are over-massive relative to the stellar bulge mass or central stellar velocity dispersion of their host galaxies. As BHs residing at the bottom of the galaxy cluster’s potential well may undergo physical processes that are driven by the large-scale characteristics of the ga…
First Analysis of Ground-Level Enhancement (GLE) 72 on 10 September 2017: Spectral and Anisotropy Characteristics
Usoskin, I.; Vainio, R.; Valtonen, E. +4 more
Using data obtained with neutron monitors and space-borne instruments, we analyzed the second ground-level enhancement (GLE) of Solar Cycle 24, namely the event of 10 September 2017 (GLE 72), and derived the spectral and angular characteristics of associated GLE particles. We employed a new neutron-monitor yield function and a recently proposed mo…
Dark Matter Equation of State through Cosmic History
Kopp, Michael; Skordis, Constantinos; Thomas, Daniel B. +1 more
Cold dark matter is a crucial constituent of the current concordance cosmological model. Having a vanishing equation of state (EOS), its energy density scales with the inverse cosmic volume and is thus uniquely described by a single number, its present abundance. We test the inverse cosmic volume law for dark matter (DM) by allowing its EOS to var…
Heavy X-ray obscuration in the most luminous galaxies discovered by WISE
Stern, D.; Brandt, W. N.; Comastri, A. +11 more
Hot dust-obscured galaxies (DOGs) are hyperluminous (L8-1000 µm > 1013 L⊙) infrared galaxies with extremely high (up to hundreds of K) dust temperatures. The sources powering both their extremely high luminosities and dust temperatures are thought to be deeply buried and rapidly accreting supermassive blac…
Search for Galactic runaway stars using Gaia Data Release 1 and HIPPARCOS proper motions
Lennon, D. J.; Simón-Díaz, S.; Maíz Apellániz, J. +5 more
Context. The first Gaia Data Release (DR1) significantly improved the previously available proper motions for the majority of the Tycho-2 stars.
Aims: We wish to detect runaway stars using Gaia DR1 proper motions and compare our results with previous searches.
Methods: Runaway O stars and BA supergiants were detected using a 2D proper mo…
Spiral arm crossings inferred from ridges in Gaia stellar velocity distributions
Steinmetz, Matthias; Chiappini, Cristina; Minchev, Ivan +7 more
The solar neighbourhood contains disc stars that have recently crossed spiral arms in the Galaxy. We propose that boundaries in local velocity distributions separate stars that have recently crossed and been more strongly perturbed by a particular arm from those that haven't. Ridges in the stellar velocity distributions constructed from the second…
The MAVERIC Survey: A Red Straggler Binary with an Invisible Companion in the Galactic Globular Cluster M10
Strader, Jay; Bahramian, Arash; Maccarone, Thomas J. +9 more
We present the discovery and characterization of a radio-bright binary in the Galactic globular cluster M10. First identified in deep radio continuum data from the Karl G. Jansky Very Large Array, M10-VLA1 has a flux density of 27 ± 4 µJy at 7.4 GHz and a flat-to-inverted radio spectrum. Chandra imaging shows an X-ray source with L X <…
SUPER. I. Toward an unbiased study of ionized outflows in z ∼ 2 active galactic nuclei: survey overview and sample characterization
Magnelli, B.; Rodighiero, G.; Salvato, M. +36 more
Theoretical models of galaxy formation suggest that the presence of an active galactic nucleus (AGN) is required to regulate the growth of its host galaxy through feedback mechanisms, produced by, for example, AGN-driven outflows. Although many observational studies have revealed that such outflows are common both at low and high redshift, a compr…
A Multiwavelength Look at Galactic Massive Star-forming Regions
Binder, Breanna A.; Povich, Matthew S.
We present a multiwavelength study of 28 Galactic massive star-forming H II regions. For 17 of these regions, we present new distance measurements based on Gaia DR2 parallaxes. By fitting a multicomponent dust, blackbody, and power-law continuum model to the 3.6 µm through 10 mm spectral energy distributions, we find that ∼34% of Lyman conti…
Three Small Planets Transiting a Hyades Star
Cochran, William D.; Endl, Michael; Tamura, Motohide +33 more
We present the discovery of three small planets transiting K2-136 (LP 358 348, EPIC 247589423), a late K dwarf in the Hyades. The planets have orbital periods of 7.9757 ± 0.0011, {17.30681}-0.00036+0.00034, and {25.5715}-0.0040+0.0038 {days}, and radii of 1.05 ± 0.16, 3.14 ± 0.36, and {1.55}-0.21