Search Publications
A galactic outflow traced by its extended Mg II emission out to a ∼30 kpc radius in the Hubble Ultra Deep Field with MUSE
Feltre, Anna; Verhamme, Anne; Wisotzki, Lutz +12 more
We report the discovery of a rare Mg IIλλ2796, 2803 doublet emission halo around a star-forming galaxy with log(M⋆/M⊙) = 10.3 ± 0.3 at z = 0.737 in deep (9.94 h) VLT/MUSE data from the MUSE-HUDF mosaic. While the central region prominently displays an absorption-dominated Mg II doublet characterized by discernible P-Cyg featu…
Stellar feedback in the star formation-gas density relation: Comparison between simulations and observations
Zavagno, A.; Russeil, D.; Hennebelle, P. +3 more
Context. The impact of stellar feedback on the Kennicutt-Schmidt (KS) law, which relates the star formation rate (SFR) to the surface gas density, is a topic of ongoing debate. The interpretation of high-resolution observations of individual clouds is challenging due to the various processes at play simultaneously and inherent biases. Therefore, a…
The S-PLUS Transient Extension Program: imaging pipeline, transient identification, and survey optimization for multimessenger astronomy
Mendes de Oliveira, C.; Alvarez-Candal, A.; Kilpatrick, C. D. +9 more
We present the S-PLUS Transient Extension Program (STEP): a supernova and fast transient survey conducted in the southern hemisphere using data from the Southern Photometric Local Universe Survey (S-PLUS) Main Survey and the T80-South telescope. Transient astrophysical phenomena have a range of interest that goes through different fields of astrop…
Characterization of Herschel-selected strong lens candidates through HST and sub-mm/mm observations
Berta, S.; Pérez-Fournon, I.; Rodighiero, G. +36 more
We have carried out Hubble Space Telescope (HST) snapshot observations at 1.1 µm of 281 candidate strongly lensed galaxies identified in the wide-area extragalactic surveys conducted with the Herschel Space Observatory. Our candidates comprise systems with flux densities at $500\, \mu$m, S500 ≥ 80 mJy. We model and subtract the su…
A study on the metallicity gradients in the galactic disk using open clusters
Deepak; Malhotra, Sagar; Joshi, Yogesh Chandra
We study the metallicity distribution and evolution in the galactic disk based on the largest sample of open star clusters in the galaxy. From the catalog of 1,879 open clusters in the range of galactocentric distance (RGC) from 4 to 20 kpc, we investigate the variation in metallicity in the galactic disk as functions of RGC, vertical distance (Z)…
Spectroscopic analysis of the strongly lensed SN Encore: constraints on cosmic evolution of Type Ia supernovae
Pérez-Fournon, I.; Koekemoer, Anton M.; Poidevin, F. +16 more
Strong gravitational lensing magnifies the light from a background source, allowing us to study these sources in detail. Here, we study the spectra of a
An Empirical Calibration of the Tip of the Red Giant Branch Distance Method in the Near Infrared. I. Hubble Space Telescope WFC3/IR F110W and F160W Filters
McQuinn, Kristen B. W.; Dolphin, Andrew E.; Skillman, Evan D. +4 more
The tip of the red giant branch (TRGB) based distance method in the I band is one of the most efficient and precise techniques for measuring distances to nearby galaxies (D ≲ 15 Mpc). The TRGB in the near-infrared (NIR) is 1–2 mag brighter relative to the I band, and has the potential to expand the range over which distance measurements to nearby …
Gas conditions of a star-formation selected sample in the first billion years
Carniani, Stefano; Fujimoto, Seiji; Vallini, Livia +20 more
We present Atacama Large Millimetre/submillimetre Array (ALMA) observations of the [O III] 88 $\mu {\rm m}$ emission of a sample of thirteen galaxies at $z = 6$ to 7.6 selected as [C II]-emitting companion sources of quasars. To disentangle the origins of the luminous Oxygen line in the $z\, \gt\, 6$ Universe, we looked at emission-line galaxies t…
NuSTAR Observations of Candidate Subparsec Binary Supermassive Black Holes
Djorgovski, S. G.; Connor, Thomas; Walton, Dominic J. +12 more
We present an analysis of NuSTAR X-ray observations of three active galactic nuclei (AGN) that were identified as candidate subparsec binary supermassive black hole (SMBH) systems in the Catalina Real-Time Transient Survey based on apparent periodicity in their optical light curves. Simulations predict that close-separation accreting SMBH binaries…
Runaway OB Stars in the Small Magellanic Cloud. III. Updated Kinematics and Insights into Dynamical versus Supernova Ejections
Oey, M. S.; Phillips, Grant D.; Cuevas, Maria +2 more
We use the kinematics of field OB stars to estimate the frequencies of runaway stars generated by the dynamical ejection scenario (DES), the binary supernova scenario (BSS), and the combined two-step mechanism. We update the proper motions for field OB and OBe stars in the Small Magellanic Cloud (SMC) using Gaia DR3. Our sample now contains 336 st…