Search Publications
A radio-jet-driven outflow in the Seyfert 2 galaxy NGC 2110?
Rigopoulou, D.; Hönig, S. F.; Villar-Martín, M. +16 more
We present a spatially resolved study of the ionized gas in the central 2 kpc of the Seyfert 2 galaxy NGC 2110 and investigate the role of its moderate-luminosity radio jet (kinetic radio power of Pjet = 2.3 × 1043 erg s−1). We used new optical integral-field observations taken with the MEGARA spectrograph at the G…
The VLT MUSE NFM view of outflows and externally photoevaporating discs near the orion bar★
Bally, John; Reiter, Megan; Manara, Carlo F. +10 more
We present Very Large Telescope/Multi-Unit Spectroscopic Explorer Narrow Field Mode observations of a pair of disc-bearing young stellar objects towards the Orion Bar: 203-504 and 203-506. Both of these discs are subject to external photoevaporation, where winds are launched from their outer regions due to environmental irradiation. Intriguingly, …
Catalog of Planetary Nebulae Detected by GALEX and Corollary Optical Surveys
Bianchi, L.; Gómez-Muñoz, M. A.; Manchado, A.
Planetary nebulae (PNs) consist of an ionized envelope surrounding a hot central star (CSPN) that emits mostly at ultraviolet (UV) wavelengths. UV observations, therefore, provide important information on both the CSPN and the nebula. We have matched the PNs in the Hong Kong/Australian Astronomical Observatory/Strasbourg Hα catalog with the Galaxy…
The young massive SMC cluster NGC 330 seen by MUSE. III. Stellar parameters and rotational velocities
Wang, C.; Dufton, P. L.; de Mink, S. E. +11 more
Context. The origin of the initial rotation rates of stars, and how a star's surface rotational velocity changes during the evolution, either by internal angular momentum transport or due to interactions with a binary companion, remain open questions in stellar astrophysics.
Aims: Here, we aim to derive the physical parameters and study the d…
Hydrogen column density variability in a sample of local Compton-thin AGN
Ajello, M.; Marchesi, S.; Torres-Albà, N. +5 more
We present the analysis of multiepoch observations of a set of 12 variable, Compton-thin, local (z < 0.1) active galactic nuclei (AGN) selected from the 100-month BAT catalog. We analyzed all available X-ray data from Chandra, XMM-Newton, and NuSTAR, adding up to a total of 53 individual observations. This corresponds to between three and seven…
Dependence of Chemical Abundance on the Cosmic-Ray Ionization Rate in IC 348
Li, Di; Wang, Junzhi; Yue, Nannan +8 more
Ions (e.g., ${{\rm{H}}}_{3}^{+}$ , H2O+) have been used extensively to quantify the cosmic-ray ionization rate (CRIR) in diffuse sightlines. However, measurements of the CRIR in low-to-intermediate density gas environments are rare, especially when background stars are absent. In this work, we combine molecular line observati…
The Panchromatic Hubble Andromeda Treasury: Triangulum Extended Region (PHATTER). V. The Structure of M33 in Resolved Stellar Populations
Bell, Eric F.; Williams, Benjamin F.; Choi, Yumi +14 more
We present a detailed analysis of the structure of the Local Group flocculent spiral galaxy M33, as measured using the Panchromatic Hubble Andromeda Treasury Triangulum Extended Region (PHATTER) survey. Leveraging the multiwavelength coverage of PHATTER, we find that the oldest populations are dominated by a smooth exponential disk with two distin…
The clumpy structure of ϵ Eridani's debris disc revisited by ALMA
Cruz-Sáenz de Miera, Fernando; Dent, William R. F.; Wyatt, Mark C. +8 more
ϵ Eridani is the closest star to our Sun known to host a debris disc. Prior observations in the (sub-)millimetre regime have potentially detected clumpy structure in the disc and attributed this to interactions with an (as yet) undetected planet. However, the prior observations were unable to distinguish between structure in the disc and backgroun…
CHIME Discovery of a Binary Pulsar with a Massive Nondegenerate Companion
Ransom, Scott M.; van Kerkwijk, M. H.; Kaspi, Victoria M. +25 more
Of the more than 3000 radio pulsars currently known, only ~300 are in binary systems, and only five of these consist of young pulsars with massive nondegenerate companions. We present the discovery and initial timing, accomplished using the Canadian Hydrogen Intensity Mapping Experiment (CHIME) telescope, of the sixth such binary pulsar, PSR J2108…
Photometric variability of the LAMOST sample of magnetic chemically peculiar stars as seen by TESS
Paunzen, E.; Shultz, M. E.; Bernhard, K. +2 more
Context. High-quality light curves from space-based missions have opened up a new window on the rotational and pulsational properties of magnetic chemically peculiar (mCP) stars and have fuelled asteroseismic studies. They allow the internal effects of surface magnetic fields to be probed and numerous astrophysical parameters to be derived with gr…