Search Publications
VVVX survey dusts off a new intermediate-age star cluster in the Milky Way disk
Minniti, D.; Saito, R. K.; Fernández-Trincado, J. G. +5 more
Context. In the last decade, many new star clusters have been discovered in heavily obscured regions of the Milky Way bulge and disk.
Aims: Our primary long-term objective is to seek out additional star clusters in the poorly studied regions of the Milky Way, where detections pose significant challenges. The aim of this pursuit is to finalize…
Weak equivalence principle and nonrelativistic limit of general dispersion relations
Hohmann, Manuel; Pfeifer, Christian; Wagner, Fabian
We study the weak equivalence principle in the context of modified dispersion relations, a prevalent approach to quantum gravity phenomenology. We find that generic modified dispersion relations violate the weak equivalence principle. The acceleration in general depends on the mass of the test body, unless the Hamiltonian is either 2-homogeneous i…
J0011+3217: A peculiar radio galaxy with a one-sided secondary lobe and misaligned giant primary lobes
Hardcastle, Martin J.; Pal, Sabyasachi; Kumari, Shobha +1 more
From the LOFAR Two-metre Sky Survey second data release (LoTSS DR2) at 144 MHz, we identified a peculiar radio galaxy, J0011+3217. It has a large, one-sided diffuse secondary wing that stretches up to 0.85 Mpc (roughly 85% of the size of the primary lobe). The linear size of the primary lobe of the galaxy is 0.99 Mpc. This peculiar source is a gia…
The Origin of Young Stellar Populations in NGC 1783: Accretion of External Stars
Milone, Antonino P.; Wang, Li; Deng, Licai +4 more
The presence of young stellar populations in the Large Magellanic Cloud cluster NGC 1783 has caught significant attention, with suggestions ranging from it being a genuine secondary stellar generation to a population of blue straggler stars or simply contamination from background stars. Thanks to multiepoch observations with the Hubble Space Teles…
TOI-4336 A b: A temperate sub-Neptune ripe for atmospheric characterization in a nearby triple M-dwarf system
Queloz, D.; Winn, J. N.; Kaltenegger, L. +54 more
Context. Small planets transiting bright nearby stars are essential to our understanding of the formation and evolution of exoplanetary systems. However, few constitute prime targets for atmospheric characterization, and even fewer are part of multiple star systems.
Aims: This work aims to validate TOI-4336 A b, a sub-Neptune-sized exoplanet …
A High Incidence of Dusty Hα Emitters at z > 3 Among UltraVISTA Dropout Galaxies in COSMOS Revealed by JWST
Rinaldi, Pierluigi; Caputi, Karina I.; Ashby, Matthew L. N. +3 more
We have characterized 26 Spitzer/IRAC-selected sources from the SMUVS program that are undetected in the UltraVISTA DR5 H- and/or K s-band images, covering 94 arcmin2 of the COSMOS field, which have deep multiwavelength JWST photometry. We analyzed the JWST/NIRCam imaging from the PRIMER survey and ancillary HST data to revea…
Evidence for a Fast Soft X-Ray Wind in M82 from XMM-RGS
Boettcher, Erin; Hodges-Kluck, Edmund
Starburst wind models predict that metals and energy are primarily carried out of the disk by hot gas (T > 106 K), but the low energy resolution of X-ray CCD observations results in large uncertainties on the mass and energy loading. Here, we present evidence for a fast soft X-ray wind from the prototypical starburst galaxy M82 using…
UVIT Study of the MAgellanic Clouds (U-SMAC) - I. Recent star formation history and kinematics of the Shell region in the north-eastern Small Magellanic Cloud
Cioni, Maria-Rosa L.; Subramaniam, Annapurni; Subramanian, Smitha +2 more
The interactions between the Magellanic Clouds significantly affect the shape and distribution of the young stellar population, particularly in the periphery of the Small Magellanic Cloud (SMC). We present the first far-UV (FUV) map of the north-east SMC-Shell region using the Ultra Violet Imaging Telescope (UVIT) onboard AstroSat. The detected FU…
Revealing the state transition of Cen X-3 at high spectral resolution with Chandra
Torrejón, J. M.; Postnov, K.; Nowak, M. +4 more
Cen X-3 is a compact, high-mass X-ray binary (HMXRB), likely powered by Roche lobe overflow. We present a phase-resolved X-ray spectral and timing analysis of a target of opportunity Chandra observation made during a low-flux to high-flux transition. The high-resolution spectra allow us to delve into the events that occurred during this episode. T…
A comprehensive X-ray analysis of the massive O-type binary HD 93250 over two decades
De Becker, Michaël; Arora, Bharti; Pandey, Jeewan C.
Context. Massive star winds are known to be responsible for X-ray emission arising from wind plasma heated by the strong shocks up to temperatures of 106-107 K in the case of colliding wind binaries. The investigation of X-ray emission from massive stars thus constitutes a valuable tool for identifying binaries, which is othe…