Search Publications
Serendipitous detection of the dusty Type IIL SN 1980K with JWST/MIRI
Temim, Tea; Van Dyk, Schuyler D.; Filippenko, Alexei V. +39 more
We present mid-infrared (mid-IR) imaging of the Type IIL supernova (SN) 1980K with the JWST more than 40 yr post-explosion. SN 1980K, located in the nearby (D ≈ 7 Mpc) 'SN factory' galaxy NGC 6946, was serendipitously captured in JWST/MIRI images taken of the field of SN 2004et in the same galaxy. SN 1980K serves as a promising candidate for study…
WTP 10aaauow: discovery of a new FU Ori outburst towards the RCW 49 star-forming region in NEOWISE data
De, Kishalay; Hillenbrand, Lynne; Tran, Vinh
Large-amplitude accretion outbursts in young stars are expected to play a central role in protostellar assembly. Outburst identification historically has taken place using optical techniques, but recent, systematic infrared searches are enabling their discovery in heavily dust-obscured regions of the Galactic plane. Here, we present the discovery …
A study of extreme C III]1908 & [O III]88/[C II]157 emission in Pox 186: implications for JWST+ALMA (FUV + FIR) studies of distant galaxies
Kumari, Nimisha; Aloisi, Alessandra; Leitherer, Claus +4 more
Carbon spectral features are ubiquitous in the ultraviolet (UV) and far-infrared (FIR) spectra of the reionization-era galaxies. We probe the ionized carbon content of a dwarf galaxy Pox 186 using the UV, optical, mid-infrared, and FIR data taken with Hubble, Gemini, Spitzer, and Herschel, respectively. This local (z ~ 0.0040705) galaxy is likely …
Revisiting the membership, multiplicity, and age of the Beta Pictoris Moving Group in the Gaia era
van Saders, Jennifer; Gaidos, Eric; Gagné, Jonathan +2 more
Determining the precise ages of young (tens to a few hundred Myr) kinematic ('moving') groups is important for placing star, protoplanetary disc, and planet observations on an evolutionary timeline. The nearby ~25 Myr-old β Pictoris Moving Group (BPMG) is an important benchmark for studying stars and planetary systems at the end of the primordial …
Radial phase spirals in the Solar neighbourhood
Price-Whelan, Adrian M.; Horta, Danny; Johnston, Kathryn V. +4 more
The second data release of ESA's Gaia mission revealed numerous signatures of disequilibrium in the Milky Way's disc. These signatures are seen in the planar kinematics of stars, which manifest as ridges and ripples in R-vϕ, and in vertical kinematics, where a prominent spiral is seen in the z-vz phase space. In this work, we…
Discovery of a new blue large-amplitude pulsator in the SkyMapper DR2: SMSS J184506.82-300804.7
Wolf, Christian; Onken, Christopher A.; Bessell, Michael S. +1 more
We report the discovery of a new Blue Large-Amplitude Pulsator (BLAP), SMSS J184506-300804 (SMSS-BLAP-1) in Data Release 2 of the SkyMapper Southern Sky Survey. We conduct high-cadence photometric observations in the u band to confirm a periodic modulation of the light curve. SMSS-BLAP-1 has a ~19-min pulsation period with an amplitude of 0.2 mag …
Potential biases and prospects for the Hubble constant estimation via electromagnetic and gravitational-wave joint analyses
Gianfagna, Giulia; Piro, Luigi; Pannarale, Francesco +3 more
GW170817 is a binary neutron star merger that exhibited a gravitational wave (GW) and a gamma-ray burst, followed by an afterglow. In this work, we estimate the Hubble constant (H0) using broad-band afterglow emission and relativistic jet motion from the Very Long Baseline Interferometry and HST images of GW170817. Compared to previous …
The ALPINE-ALMA [C II] survey: characterization of spatial offsets in main-sequence galaxies at z 4-6
Koekemoer, Anton M.; Carniani, Stefano; Jones, Gareth C. +22 more
The morphology of galaxies is shaped by stellar activity, feedback, gas and dust properties, and interactions with surroundings, and can therefore provide insight into these processes. In this paper, we study the spatial offsets between stellar and interstellar medium emission in a sample of 54 main-sequence star-forming galaxies at z ~ 4-6 observ…
Missing metals in DQ stars: a compelling clue to their origin
Wilson, T. G.; Dufour, P.; Farihi, J.
White dwarf stars frequently experience external pollution by heavy elements, and yet the intrinsically carbon-enriched DQ spectral class members fail to exhibit this phenomenon, representing a decades-old conundrum. This study reports a high-resolution spectroscopic search for Ca II in classical DQ white dwarfs, finding that these stars are stunt…
The EBLM Project- XI. Mass, radius, and effective temperature measurements for 23 M-dwarf companions to solar-type stars observed with CHEOPS
Alonso, R.; Deleuil, M.; Erikson, A. +104 more
Observations of low-mass stars have frequently shown a disagreement between observed stellar radii and radii predicted by theoretical stellar structure models. This 'radius inflation' problem could have an impact on both stellar and exoplanetary science. We present the final results of our observation programme with the CHaracterising ExOPlanet Sa…