Search Publications
Spatially resolved dust properties and quasar-galaxy decomposition of a hyper-luminous infrared galaxy at z = 4.4
Krumholz, Mark R.; Wisnioski, Emily; Tsukui, Takafumi +1 more
We report spatially resolved dust properties of the quasar host galaxy BRI1335-0417 at redshift z = 4.4 constrained by the Atacama Large Millimetre/submillimetre Array observations. The dust temperature map, derived from a greybody fit to rest frame 90 and 161 µm continuum images, shows a steep increase towards the centre, reaching 57.1 ± 0.…
Direct observations of a complex coronal web driving highly structured slow solar wind
Chitta, L. P.; Seaton, D. B.; DeForest, C. E. +2 more
The solar wind consists of continuous streams of charged particles that escape into the heliosphere from the Sun, and is split into fast and slow components, with the fast wind emerging from the interiors of coronal holes. Near the ecliptic plane, the fast wind from low-latitude coronal holes is interspersed with a highly structured slow solar win…
Gaia Data Release 3. The Gaia Andromeda Photometric Survey
Audard, M.; Rimoldini, L.; Holl, B. +14 more
Context. As part of Gaia Data Release 3 (Gaia DR3), epoch photometry has been released for 1.2 million sources centred on M 31. This is a taster for Gaia Data Release 4 where all the epoch photometry will be released.
Aims: In this paper, the content of the Gaia Andromeda Photometric Survey (GAPS) is described, including statistics to assess …
CEERS: Spatially Resolved UV and Mid-infrared Star Formation in Galaxies at 0.2 < z < 2.5: The Picture from the Hubble and James Webb Space Telescopes
Papovich, Casey; Yang, Guang; Finkelstein, Steven L. +38 more
We present the mid-infrared (MIR) morphologies for 64 star-forming galaxies (SFGs) at 0.2 < z < 2.5 with stellar mass M * > 109 M ⊙ using James Webb Space Telescope (JWST) Mid-Infrared Instrument (MIRI) observations from the Cosmic Evolution Early Release Science survey. The MIRI bands span the MIR (7.7-21…
X-Ray Polarization of the BL Lacertae Type Blazar 1ES 0229+200
Kaaret, Philip; Wu, Kinwah; Enoto, Teruaki +111 more
We present polarization measurements in the 2-8 keV band from blazar 1ES 0229+200, the first extreme high synchrotron peaked source to be observed by the Imaging X-ray Polarimetry Explorer (IXPE). Combining two exposures separated by about two weeks, we find the degree of polarization to be ΠX = 17.9% ± 2.8% at an electric-vector positi…
Pegasus W: An Ultrafaint Dwarf Galaxy Outside the Halo of M31 Not Quenched by Reionization
McQuinn, Kristen B. W.; Dolphin, Andrew E.; Cohen, Roger E. +3 more
We report the discovery of an ultrafaint dwarf (UFD) galaxy, Pegasus W, located on the far side of the Milky Way-M31 system and outside the virial radius of M31. The distance to the galaxy is ${915}_{-91}^{+60}$ kpc, measured using the luminosity of horizontal branch stars identified in Hubble Space Telescope optical imaging. The galaxy has a half…
The stellar halo in Local Group Hestia simulations. I. The in situ component and the effect of mergers
Vogelsberger, Mark; Steinmetz, Matthias; Grand, Robert J. J. +12 more
Theory suggests that mergers play an important role in shaping galactic discs and stellar haloes, which was observationally confirmed in the Milky Way (MW) thanks to Gaia data. In this work, aiming to probe the contribution of mergers to the in situ stellar halo formation, we analyse six M 31 and MW analogues from the HESTIA suite of cosmological …
Do Central Compact Objects have Carbon Atmospheres?
Halpern, J. P.; Alford, J. A. J.
Only three of the dozen central compact objects (CCOs) in supernova remnants (SNRs) show thermal X-ray pulsations due to nonuniform surface temperature (hot spots). The absence of X-ray pulsations from several unpulsed CCOs has motivated suggestions that they have uniform-temperature carbon atmospheres (UTCAs), which adequately fit their spectra w…
V-LoTSS: The circularly polarised LOFAR Two-metre Sky Survey
White, G. J.; Bomans, D. J.; Ray, T. P. +44 more
We present the detection of 68 sources from the most sensitive radio survey in circular polarisation conducted to date. We used the second data release of the 144 MHz LOFAR Two-metre Sky Survey to produce circularly polarised maps with a median noise of 140 µJy beam−1 and resolution of 20″ for ≈27% of the northern sky (5634 deg2
PHANGS-JWST First Results: The 21 µm Compact Source Population
Sandstrom, Karin M.; Kruijssen, J. M. Diederik; Leroy, Adam K. +24 more
We use PHANGS-James Webb Space Telescope (JWST) data to identify and classify 1271 compact 21 µm sources in four nearby galaxies using MIRI F2100W data. We identify sources using a dendrogram-based algorithm, and we measure the background-subtracted flux densities for JWST bands from 2 to 21 µm. Using the spectral energy distribution (…