Search Publications
The gravitationally unstable gas disk of a starburst galaxy 12 billion years ago
Yun, M. S.; Iono, D.; Kohno, K. +18 more
Galaxies in the early Universe that are bright at submillimetre wavelengths (submillimetre-bright galaxies) are forming stars at a rate roughly 1,000 times higher than the Milky Way. A large fraction of the new stars form in the central kiloparsec of the galaxy1-3, a region that is comparable in size to the massive, quiescent galaxies f…
A dusty star-forming galaxy at z = 6 revealed by strong gravitational lensing
Ivison, R. J.; Zavala, Jorge A.; Smith, Matthew W. L. +29 more
Since their discovery, submillimetre-selected galaxies1,2 have revolutionized the field of galaxy formation and evolution. From the hundreds of square degrees mapped at submillimetre wavelengths3-5, only a handful of sources have been confirmed to lie at z > 5 (refs 6-10) and only two at z ≥ 6 (refs 11,12
The Circumgalactic Medium of eBOSS Emission Line Galaxies: Signatures of Galactic Outflows in Gas Distribution and Kinematics
Lan, Ting-Wen; Mo, Houjun
We study the distribution and kinematics of the cool circumgalactic medium (CGM) of emission line galaxies (ELGs) traced by metal absorption lines. Using about 200,000 ELGs from SDSS-IV eBOSS and half a million background quasars from SDSS, we measure the median absorption strength of Mg II and Fe II lines in quasar spectra for impact parameters r…
OGLE Collection of Galactic Cepheids
Soszyński, I.; Udalski, A.; Szymański, M. K. +10 more
We present here a new major part of the OGLE Collection of Variable Stars - OGLE Collection of Galactic Cepheids. The new dataset was extracted from the Galaxy Variability Survey images - a dedicated large-scale survey of the Galactic disk and outer bulge conducted by the OGLE project since 2013.
The OGLE collection contains 2721 Cepheids of …A Morphological Classification Model to Identify Unresolved PanSTARRS1 Sources: Application in the ZTF Real-time Pipeline
Miller, A. A.; Tachibana, Yutaro
In the era of large photometric surveys, the importance of automated and accurate classification is rapidly increasing. Specifically, the separation of resolved and unresolved sources in astronomical imaging is a critical initial step for a wide array of studies, ranging from Galactic science to large scale structure and cosmology. Here, we presen…
Current Systems in the Earth's Magnetosphere
Dubyagin, S.; Liemohn, M. W.; Ganushkina, N. Yu.
The distances to Novae as seen by Gaia
Schaefer, Bradley E.
The Gaia spacecraft has just released a large set of parallaxes, including 41 novae for which the fractional error is <30 per cent. I have used these to evaluate the accuracy and bias of the many prior methods for getting nova distances. The best of the prior methods is the geometrical parallaxes from Hubble Space Telescope for just four novae,…
Explaining LIGO's observations via isolated binary evolution with natal kicks
Belczynski, Krzysztof; Holz, Daniel E.; Berti, Emanuele +5 more
We compare binary evolution models with different assumptions about black-hole natal kicks to the first gravitational-wave observations performed by the LIGO detectors. Our comparisons attempt to reconcile merger rate, masses, spins, and spin-orbit misalignments of all current observations with state-of-the-art formation scenarios of binary black …
New constraints on time-dependent variations of fundamental constants using Planck data
Chluba, Jens; Hart, Luke
Observations of the cosmic microwave background (CMB) today allow us to answer detailed questions about the properties of our Universe, targeting both standard and non-standard physics. In this paper, we study the effects of varying fundamental constants (i.e. the fine-structure constant, αEM, and electron rest mass, me) arou…
The nature of luminous Ly α emitters at z ∼ 2-3: maximal dust-poor starbursts and highly ionizing AGN
Smail, Ian; Sobral, David; Mobasher, Bahram +8 more
Deep narrow-band surveys have revealed a large population of faint Ly α emitters (LAEs) in the distant Universe, but relatively little is known about the most luminous sources ({L}_{Lyα } ≳ 10^{42.7} erg s-1; L_{Lyα }≳ L^*_{Lyα }). Here we present the spectroscopic follow-up of 21 luminous LAEs at z ∼ 2-3 found with panoramic narrow-ban…