Search Publications
Searching for candidates of Lyman continuum sources - revisiting the SSA22 field
Inoue, Akio K.; Yamada, Toru; Iwata, Ikuru +3 more
We present the largest to date sample of hydrogen Lyman continuum (LyC) emitting galaxy candidates at any redshift, with 18 Lyman α emitters (LAEs) and seven Lyman break galaxies (LBGs), obtained from the SSA22 field with Subaru/Suprime-Cam. The sample is based on the 159 LAEs and 136 LBGs observed in the field, all with spectroscopically confirme…
Exploring the nature and synchronicity of early cluster formation in the Large Magellanic Cloud - II. Relative ages and distances for six ancient globular clusters
Cohen, Roger E.; Wagner-Kaiser, R.; Sarajedini, Ata +6 more
We analyse Hubble Space Telescope observations of six globular clusters in the Large Magellanic Cloud (LMC) from programme GO-14164 in Cycle 23. These are the deepest available observations of the LMC globular cluster population; their uniformity facilitates a precise comparison with globular clusters in the Milky Way. Measuring the magnitude of t…
The highly active Anhur-Bes regions in the 67P/Churyumov-Gerasimenko comet: results from OSIRIS/ROSETTA observations
Jorda, L.; Lamy, P. L.; Bertaux, J. -L. +51 more
The Southern hemisphere of the 67P/Churyumov-Gerasimenko comet has become visible from Rosetta only since 2015 March. It was illuminated during the perihelion passage and therefore it contains the regions that experienced the strongest heating and erosion rates, thus exposing the sub-surface most pristine material. In this work we investigate, tha…
The MUSE view of the host galaxy of GRB 100316D
Covino, S.; Sánchez-Ramírez, R.; Della Valle, M. +23 more
The low distance, z = 0.0591, of GRB 100316D and its association with SN 2010bh represent two important motivations for studying this host galaxy and the GRB's immediate environment with the integral field spectrographs like Very Large Telescope/Multi-Unit Spectroscopic Explorer. Its large field of view allows us to create 2D maps of gas metallici…
Primeval very low-mass stars and brown dwarfs - II. The most metal-poor substellar object
Homeier, D.; Pinfield, D. J.; Jones, H. R. A. +4 more
SDSS J010448.46+153501.8 has previously been classified as an sdM9.5 subdwarf. However, its very blue J - K colour (-0.15 ± 0.17) suggests a much lower metallicity compared to normal sdM9.5 subdwarfs. Here, we re-classify this object as a usdL1.5 subdwarf based on a new optical and near-infrared spectrum obtained with X-shooter on the Very Large T…
Mpc-scale diffuse radio emission in two massive cool-core clusters of galaxies
Babul, Arif; Bertoldi, Frank; Bonafede, Annalisa +4 more
Radio haloes are diffuse synchrotron sources on scales of ∼1 Mpc that are found in merging clusters of galaxies, and are believed to be powered by electrons re-accelerated by merger-driven turbulence. We present measurements of extended radio emission on similarly large scales in two clusters of galaxies hosting cool cores: Abell 2390 and Abell 22…
A stellar census of the nearby, young 32 Orionis group
Murphy, Simon J.; Mamajek, Eric E.; Bell, Cameron P. M.
The 32 Orionis group was discovered almost a decade ago and despite the fact that it represents the first northern, young (age ∼ 25 Myr) stellar aggregate within 100 pc of the Sun (d ≃ 93 pc), a comprehensive survey for members and detailed characterization of the group has yet to be performed. We present the first large-scale spectroscopic survey…
A remarkably large depleted core in the Abell 2029 BCG IC 1101
Graham, Alister W.; Knapen, Johan H.; Dullo, Bililign T.
We report the discovery of an extremely large (Rb ∼2.77 arcsec ≈ 4.2 kpc) core in the brightest cluster galaxy, IC 1101, of the rich galaxy cluster Abell 2029. Luminous core-Sérsic galaxies contain depleted cores - with sizes (Rb) typically 20-500 pc - that are thought to be formed by coalescing black hole binaries. We fit a …
VALES I: the molecular gas content in star-forming dusty H-ATLAS galaxies up to z = 0.35
Rodighiero, G.; Ivison, R. J.; Cooray, A. +24 more
We present an extragalactic survey using observations from the Atacama Large Millimeter/submillimeter Array (ALMA) to characterize galaxy populations up to z = 0.35: the Valparaíso ALMA Line Emission Survey (VALES). We use ALMA Band-3 CO(1-0) observations to study the molecular gas content in a sample of 67 dusty normal star-forming galaxies selec…
Star formation and AGN activity in a sample of local luminous infrared galaxies through multiwavelength characterization
Mattila, Seppo; Alberdi, Antxon; Väisänen, Petri +8 more
Nuclear starbursts and active galactic nucleus (AGN) activity are the main heating processes in luminous infrared galaxies (LIRGs) and their relationship is fundamental to understand galaxy evolution. In this paper, we study the star formation and AGN activity of a sample of 11 local LIRGs imaged with subarcsecond angular resolution at radio (8.4 …