Search Publications
Ultracool spectroscopic outliers in Gaia DR3
Sarro, L. M.; Cooper, W. J.; Smart, R. L. +1 more
Gaia DR3 provided a first release of RP spectra and astrophysical parameters for ultracool dwarfs (UCDs). We used these Gaia RP spectra and astrophysical parameters to select the most outlying UCDs. These objects have spectral types of M7 or later and might be young brown dwarfs or low-metallicity objects. This work aimed to find UCDs that have Ga…
Spatiotemporal map of star clusters in the Magellanic Clouds using Gaia: synchronized peaks and radial shrinkage of cluster formation
Subramanian, S.; Subramaniam, A.; Nayak, Prasanta K. +1 more
We present a detailed view of cluster formation (CF) to trace the evolution and interaction history of the Magellanic Clouds (MCs) in the last 3.5 Gyr. Using the Gaia DR3 data, we parametrized 1710 and 280 star clusters in the Large Magellanic Cloud (LMC) and the Small Magellanic Cloud (SMC), where 847 and 113 clusters are newly characterized in t…
The peculiar bursting nature of CP Pup
Knigge, C.; Done, C.; Scaringi, S. +5 more
The classical nova CP Puppis has been observed to have particularly puzzling and peculiar properties. In particular, this classical nova displays occasional bursts in its long-term ASAS-SN light curve. Here, we report on five sectors of TESS data displaying two of these rapid bursts, lasting ~1 d. Based on the estimated lower energy limits of the …
XMM-Newton Ultra Narrow Deep Field survey - II. X-ray spectral analysis of the brightest AGN population
Vignali, C.; Nicastro, F.; Krongold, Y. +6 more
In this work, we present the results of a detailed X-ray spectral analysis of the brightest active galactic nuclei (AGNs) detected in the XMM-Newton 1.75 Ms Ultra Narrow Deep Field. We analysed 23 AGNs that have a luminosity range of $\sim 10^{42} {\!-\!} 10^{46}\, \rm {erg}\, \rm {s}^{-1}$ in the $2 {\!-\!} 10\, \rm {keV}$ energy band, redshifts …
Evaporation ages: A new dating method for young star clusters
Miret-Roig, N.; Pelkonen, V. -M.; Padoan, P.
Context. The ages of young star clusters are fundamental clocks to constrain the formation and evolution of pre-main-sequence stars and their protoplanetary disks and exoplanets. However, dating methods for very young clusters often disagree, casting doubts on the accuracy of the derived ages.
Aims: We propose a new method to derive the kinem…
Faraday tomography of LoTSS-DR2 data. II. Multi-tracer analysis in the high-latitude outer Galaxy
Soler, Juan D.; Haverkorn, Marijke; Turić, Luka +4 more
Context. We conducted a follow-up study on the analysis of the LOw Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) mosaic in the high-latitude outer Galaxy presented in the first paper of this series. Here, we focus on the search for alignment between the magnetic field traced by dust, HI filaments, starlight optical linear polarisation, and …
UVCANDELS: Catalogs of Photometric Redshifts and Galaxy Physical Properties
Barro, Guillermo; Arrabal Haro, Pablo; Dickinson, Mark +77 more
The UltraViolet imaging of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey Fields (UVCANDELS) program provides deep Hubble Space Telescope (HST) F275W and F435W imaging over four CANDELS fields (GOODS-N, GOODS-S, COSMOS, and Extended Groth Strip). We combine this newly acquired UV imaging with existing HST imaging from CANDELS a…
Host Galaxy Properties of Gamma-Ray Bursts Involving Neutron Star Binary Mergers and Their Impact on Kilonovae Rates
Im, Myungshin; Jeong, Mankeun
In the upcoming gravitational-wave (GW) observing runs, identifying host galaxies is crucial as it provides essential redshift information and enables the use of GW events as standard sirens. However, pinpointing host galaxies remains challenging due to the large localization uncertainties and the rapidly fading nature of their optical counterpart…
Elemental Abundances in the Diffuse Interstellar Medium from Joint Far-ultraviolet and X-Ray Spectroscopy: Iron, Oxygen, Carbon, and Sulfur
Costantini, E.; Mehdipour, M.; García, J. A. +10 more
In this study, we investigate interstellar absorption lines along the line of sight toward the galactic low-mass X-ray binary Cygnus X-2. We combine absorption line data obtained from high-resolution X-ray spectra collected with the Chandra and XMM-Newton satellites, along with far-UV absorption lines observed by the Hubble Space Telescope's (HST)…
Revealing the Quiescent Galaxy Population in the Spiderweb Protocluster at z = 2.16 with Deep HST/WFC3 Slitless Spectroscopy
Koyama, Yusei; Kodama, Tadayuki; Shimakawa, Rhythm +6 more
We report the Hubble Space Telescope Wide Field Camera 3 G141 grism slitless spectroscopy observation of the core region of the Spiderweb protocluster at z = 2.16. We analyzed the spectra of all objects in a