Search Publications
Different higher order kinematics between star-forming and quiescent galaxies based on the SAMI, MAGPI, and LEGA-C surveys
Bell, Eric F.; Übler, Hannah; D'Eugenio, Francesco +38 more
We present the first statistical study of spatially integrated non-Gaussian stellar kinematics spanning 7 Gyr in cosmic time. We use deep, rest-frame optical spectroscopy of massive galaxies (stellar mass $M_\star \gt 10^{10.5} \, \mathrm{M_\odot }$) at redshifts z = 0.05, 0.3, and 0.8 from the SAMI, MAGPI, and LEGA-C surveys, to measure the exces…
M92 (NGC 6341) Is a Metal-complex Globular Cluster with an Atypical Primordial Population
Lee, Jae-Woo
We present a multiple stellar population study of the metal-poor globular cluster (GC) M92 (NGC 6341), which is long known for the substantial metallicity dispersion, using our own photometric system. We find two groups with slightly different mean metallicities, the metal-poor (MP) stars with [Fe/H] hk = -2.412 ± 0.03 and the metal-ri…
Mapping the Decline with Redshift of Dusty Star-forming Galaxies Using JWST and SCUBA-2
Barger, A. J.; Cowie, L. L.
We use JWST NIRCam observations of the massive lensing cluster field A2744 to develop a red galaxy selection of f F444W > 1 µJy and f F444W/f F150W > 3.5 that picks out all nine >4.5σ Atacama Large Millimeter/submillimeter Array 1.1 or 1.2 mm sources and 17 of the 19 >5σ SCUBA-2 850 µm sourc…
Star formation efficiency and AGN feedback in narrow-line Seyfert 1 galaxies with fast X-ray nuclear winds
Feruglio, C.; García-Burillo, S.; Krongold, Y. +7 more
We present the first systematic study of the molecular gas and star formation efficiency in a sample of ten narrow-line Seyfert 1 galaxies selected to have X-ray Ultra Fast Outflows and, therefore, to potentially show AGN feedback effects. CO observations were obtained with the IRAM 30-m telescope in six galaxies and from the literature for four g…
Much ado about no offset - characterizing the anomalous multiple-image configuration and the model-driven displacement between light and mass in the multiplane strong lens Abell 3827
Griffiths, Richard E.; Wagner, Jenny; Lin, Joyce
Abell 3827 is a unique galaxy cluster with a dry merger in its core causing a highly resolved multiple-image configuration of a blue spiral galaxy at zs = 1.24. The surface brightness profiles of four merging galaxies around zd = 0.099 complicate a clear identification of the number of images and finding corresponding small-s…
Resolving the binary components of the outbursting protostar HBC 494 with ALMA
Herczeg, Gregory J.; Zhu, Zhaohuan; Pérez, Sebastián +15 more
Episodic accretion is a low-mass pre-main sequence phenomenon characterized by sudden outbursts of enhanced accretion. These objects are classified into two: protostars with elevated levels of accretion that lasts for decades or more, called FUors, and protostars with shorter and repetitive bursts, called EXors. HBC 494 is a FUor object embedded i…
A multi-technique approach to identifying and/or constraining radial-velocity substellar companions
Kiefer, F.; Lagrange, A. -M.; Rubini, P. +3 more
Context. Although more than one thousand substellar companions have already been detected with the radial velocity (RV) method, many new companions remain to be detected in the public RV archives.
Aims: We wish to use the archival data obtained with the ESO/HARPS spectrograph to search for substellar companions.
Methods: We used the astr…
X-shooter survey of young intermediate-mass stars - I. Stellar characterization and disc evolution
Pascucci, Ilaria; Petr-Gotzens, Monika G.; Panić, Olja +6 more
Intermediate-mass stars (IMSs) represent the link between low-mass and high-mass stars, and cover a key mass range for giant planet formation. In this paper, we present a spectroscopic survey of 241 young IMS candidates with IR-excess, the most complete unbiased sample to date within 300 pc. We combined VLT/X-Shooter spectra with BVR photometric o…
A Statistical Study of IRIS Observational Signatures of Nanoflares and Nonthermal Particles
Polito, Vanessa; Testa, Paola; De Pontieu, Bart +1 more
Nanoflares are regarded as one of the major mechanisms of magnetic energy release and coronal heating in the solar outer atmosphere. We conduct a statistical study on the response of the chromosphere and transition region to nanoflares, as observed by the Interface Region Imaging Spectrograph (IRIS), by using an algorithm for the automatic detecti…
A geometric calibration of the tip of the red giant branch in the Milky Way using Gaia DR3
Lidman, C.; Flynn, C.; Dixon, M. +3 more
We use the latest parallaxes measurements from Gaia DR3 to obtain a geometric calibration of the tip of the red giant branch (TRGB) in Cousins I magnitudes as a standard candle for cosmology. We utilize the following surveys: SkyMapper DR3, APASS DR9, ATLAS Refcat2, and Gaia DR3 synthetic photometry to obtain multiple zero-point calibrations of th…