Search Publications
Detection of millihertz quasi-periodic oscillations in the X-Ray binary 1RXS J180408.9-342058
Galloway, Duncan K.; Chou, Yi; Hsieh, Hung-En +2 more
Millihertz quasi-periodic oscillations (mHz QPOs) observed in neutron-star low-mass X-ray binaries (NS LMXBs) are generally explained as marginally stable thermonuclear burning on the neutron star surface. We report the discovery of mHz QPOs in an XMM-Newton observation of the transient 1RXS J180408.9-342058, during a regular bursting phase of its…
AlFoCS + F3D - II. Unexpectedly low gas-to-dust ratios in the Fornax galaxy cluster
De Looze, Ilse; Baes, Maarten; Bendo, George J. +14 more
We combine observations from Atacama Large Millimeter/submillimeter Array (ALMA), Australia Telescope Compact Array, Multi Unit Spectroscopic Explorer (MUSE), and Herschel to study gas-to-dust ratios in 15 Fornax cluster galaxies detected in the FIR/sub-mm by Herschel and observed by ALMA as part of the ALMA Fornax Cluster Survey. The sample spans…
Life after eruption VIII: The orbital periods of novae
Vogt, N.; Zorotovic, M.; Schreiber, M. R. +5 more
The impact of nova eruptions on the long-term evolution of Cataclysmic Variables (CVs) is one of the least understood and intensively discussed topics in the field. A crucial ingredient to improve with this would be to establish a large sample of post-novae with known properties, starting with the most easily accessible one, the orbital period. He…
A compact core-jet structure in the changing-look Seyfert NGC 2617
Paragi, Zsolt; Yang, Jun; An, Tao +9 more
The nearby face-on spiral galaxy NGC 2617 underwent an unambiguous 'inside-out' multiwavelength outburst in Spring 2013, and a dramatic Seyfert-type change probably between 2010 and 2012, with the emergence of broad optical emission lines. To search for the jet activity associated with this variable accretion activity, we carried out multiresoluti…
Searching for gravitational waves via Doppler tracking by future missions to Uranus and Neptune
Saha, Prasenjit; D'Orazio, Daniel J.; Soyuer, Deniz +1 more
The past year has seen numerous publications underlining the importance of a space mission to the ice giants in the upcoming decade. Proposed mission plans involve a ∼10 yr cruise time to the ice giants. This cruise time can be utilized to search for low-frequency gravitational waves (GWs) by observing the Doppler shift caused by them in the Earth…
Protocluster detection in simulations of HSC-SSP and the 10-yr LSST forecast, using PCcones
Overzier, Roderik A.; Sodré, Laerte, Jr.; Araya-Araya, Pablo +2 more
The progenitors of present-day galaxy clusters give important clues about the evolution of the large-scale structure, cosmic mass assembly, and galaxy evolution. Simulations are a major tool for these studies since they are used to interpret observations. In this work, we introduce a set of 'protocluster-light-cones', dubbed PCcones. They are mock…
Deep extragalactic visible legacy survey (DEVILS): stellar mass growth by morphological type since z = 1
Holwerda, Benne W.; Driver, Simon P.; Robotham, Aaron S. G. +13 more
Using high-resolution Hubble Space Telescope imaging data, we perform a visual morphological classification of ~36 000 galaxies at z < 1 in the deep extragalactic visible legacy survey/cosmological evolution survey region. As the main goal of this study, we derive the stellar mass function (SMF) and stellar mass density (SMD) sub-divided by mor…
MOBSTER - IV. Detection of a new magnetic B-type star from follow-up spectropolarimetric observations of photometrically selected candidates★
Wade, G. A.; Neiner, C.; Bowman, D. M. +8 more
In this paper, we present results from the spectropolarimetric follow-up of photometrically selected candidate magnetic B stars from the MOBSTER (Magnetic OB[A] Stars with TESS: probing their Evolutionary and Rotational properties) project. Out of four observed targets, one (HD 38170) is found to host a detectable surface magnetic field, with a ma…
A comparison of centring algorithms in the astrometry of Cassini imaging science subsystem images and Anthe's astrometric reduction
Cooper, N. J.; Lainey, V.; Vienne, A. +6 more
In the CAVIAR software package, a standard tool for astrometry of images from the Cassini imaging science subsystem (ISS), Gaussian fitting is used to measure the centre of point-like objects, achieving a typical precision of about 0.2 pixels. In this work, we consider how alternative methods may improve on this. We compare three traditional centr…
A theoretical scenario for Galactic RR Lyrae in the Gaia data base: constraints on the parallax offset
Ripepi, V.; Molinaro, R.; Marconi, M. +5 more
On the basis of an extended set of non-linear convective RR Lyrae pulsation models we derive the first theoretical light curves in the Gaia bands G, GBP, and GRP and the corresponding intensity-weighted mean magnitudes and pulsation amplitudes. The effects of chemical composition on the derived Bailey diagrams in the Gaia fil…