Search Publications
Discovery of magnetic fields along stacked cosmic filaments as revealed by radio and X-ray emission
Vazza, F.; West, J. L.; Galvin, T. J. +5 more
Diffuse filaments connect galaxy clusters to form the cosmic web. Detecting these filaments could yield information on the magnetic field strength, cosmic ray population, and temperature of intercluster gas; yet, the faint and large-scale nature of these bridges makes direct detections very challenging. Using multiple independent all-sky radio and…
A ∼75 per cent occurrence rate of debris discs around F stars in the β Pic moving group
Pawellek, Nicole; Matrà, Luca; Kennedy, Grant +2 more
Only 20 per cent of old field stars have detectable debris discs, leaving open the question of what disc, if any, is present around the remaining 80 per cent. Young moving groups allow to probe this population, since discs are expected to have been brighter early on. This paper considers the population of F stars in the 23 Myr-old β Pictoris movin…
A Galactic survey of radio jets from massive protostars
Lumsden, S. L.; Purser, S. J. D.; Hoare, M. G. +1 more
In conjunction with a previous southern-hemisphere work, we present the largest radio survey of jets from massive protostars to date with high-resolution (~0.04 arcsec) Jansky Very Large Array observations towards two subsamples of massive star-forming regions of different evolutionary statuses: 48 infrared-bright, massive, young, stellar objects …
High-resolution ALMA and HST images of q1 Eri: an asymmetric debris disc with an eccentric Jupiter
Krist, J.; Stapelfeldt, K.; Kral, Q. +10 more
We present Atacama Large Millimetre/sub-Millimetre Array (ALMA) 1.3 and 0.86 mm observations of the nearby (17.34 pc) F9V star q1 Eri (HD 10647, HR 506). This system, with age ~1.4 Gyr, hosts a ~2 au radial velocity planet and a debris disc with the highest fractional luminosity of the closest 300 FGK type stars. The ALMA images, with resolution ~…
Detection of spectral variations of Anomalous Microwave Emission with QUIJOTE and C-BASS
Ashdown, M.; Barreiro, R. B.; Chiang, H. C. +32 more
Anomalous Microwave Emission (AME) is a significant component of Galactic diffuse emission in the frequency range 10- $60\, \mathrm{GHz}$ and a new window into the properties of sub-nanometre-sized grains in the interstellar medium. We investigate the morphology of AME in the ≈10○ diameter λ Orionis ring by combining intensity data from…
Subaru/HSC deep optical imaging of infrared sources in the AKARI North Ecliptic Pole-Wide field
Momose, Rieko; Goto, Tomotsugu; Kim, Seong Jin +8 more
We present a five-broad-band (grizy) photometric catalogue of Subaru/Hyper Suprime-Cam (HSC) optical imaging observations at around the North Ecliptic Pole (NEP) where the AKARI infrared (IR) satellite conducted a large survey (NEP-Wide survey). The observations cover almost all the NEP-Wide survey field down to the depth of 28.1, 26.8, 26.3, 25.5…
Identification of AKARI infrared sources by the Deep HSC Optical Survey: construction of a new band-merged catalogue in the North Ecliptic Pole Wide field
Momose, Rieko; Hashimoto, Tetsuya; Goto, Tomotsugu +21 more
The North Ecliptic Pole field is a natural deep-field location for many satellite observations. It has been targeted many times since it was surveyed by the AKARI space telescope with its unique wavelength coverage from the near- to mid-infrared (mid-IR). Many follow-up observations have been carried out, making this field one of the most frequent…
Spectroscopic and photometric analysis of symbiotic candidates - I. Ten candidates on classical symbiotic stars
Merc, J.; Gális, R.; Wolf, M. +10 more
Symbiotic stars belong to a group of interacting binaries that display a wide variety of phenomena, including prominent outbursts connected with mass transfer, as well as stellar winds, jets, eclipses, or intrinsic variability of the components. Dozens of new symbiotic stars and candidates have been discovered in recent years. However, there are m…
The evolution of merger fraction of galaxies at z < 0.6 depending on the star formation mode in the AKARI NEP-Wide Field
Hashimoto, Tetsuya; Goto, Tomotsugu; Kim, Seong Jin +19 more
We study the galaxy merger fraction and its dependence on star formation mode in the 5.4 deg2 of the North Ecliptic Pole-Wide Field. We select 6352 galaxies with AKARI 9 $\mu$m detections, and identify mergers among them using the Gini coefficient and M20 derived from the Subaru/Hyper Suprime-Cam (HSC) optical images. We obta…
Photometric redshifts in the North Ecliptic Pole Wide field based on a deep optical survey with Hyper Suprime-Cam
Hashimoto, Tetsuya; Goto, Tomotsugu; Kim, Seong Jin +13 more
The AKARI space infrared telescope has performed near-infrared to mid-infrared (MIR) observations on the North Ecliptic Pole Wide (NEPW) field (5.4 deg2) for about 1 yr. AKARI took advantage of its continuous nine photometric bands, compared with NASA's Spitzer and Wide-field Infrared Survey Explorer(WISE) space telescopes, which had on…