Search Publications
Duality in spatially resolved star formation relations in local LIRGs
Colina, L.; Villar-Martín, M.; Arribas, S. +10 more
We analyse the star formation (SF) relations in a sample of 16 nearby luminous infrared galaxies (LIRGs) with more than 2800 regions defined on scales of 90 to 500 pc. We used ALMA to map the distribution of the cold molecular gas traced by the J = 2-1 line of CO and archival Paα HST/NICMOS imaging to trace the recent SF. In four objects we find t…
Metallicities and ages for star clusters and their surrounding fields in the Large Magellanic Cloud
Smolec, R.; Piatti, A. E.; Lewis, M. O. +15 more
Aims: We study 147 star clusters in the Large Magellanic Cloud (LMC) in order to determine their mean metallicities and ages, as well as the mean metallicities of 80 surrounding fields. We construct an age-metallicity relation (AMR) for the clusters in the LMC.
Methods: For this purpose, we used Strömgren photometry obtained with the SOI…
Extending empirical constraints on the SZ-mass scaling relation to higher redshifts via HST weak lensing measurements of nine clusters from the SPT-SZ survey at z ≳ 1
Schrabback, Tim; Hoekstra, Henk; Sharon, Keren +17 more
We present a Hubble Space Telescope (HST) weak gravitational lensing study of nine distant and massive galaxy clusters with redshifts 1.0 ≲ z ≲ 1.7 (zmedian = 1.4) and Sunyaev Zel'dovich (SZ) detection significance ξ > 6.0 from the South Pole Telescope Sunyaev Zel'dovich (SPT-SZ) survey. We measured weak lensing galaxy shapes in HST/…
Weighing the Galactic disk using phase-space spirals. III. Probing distant regions of the disk using the Gaia EDR3 proper motion sample
Monari, G.; Widmark, A.; Laporte, C. F. P.
We have applied our method to weigh the Galactic disk using phase-space spirals to the proper motion sample of Gaia's early third release (EDR3). For stars in distant regions of the Galactic disk, the latitudinal proper motion has a close projection with vertical velocity, such that the phase-space spiral in the plane of vertical position and vert…
SFR estimations from z = 0 to z = 0.9. A comparison of SFR calibrators for star-forming galaxies
Buat, V.; Boquien, M.; Małek, K. +7 more
Context. The star formation rate (SFR) is a key ingredient for studying the formation and evolution of galaxies. Being able to obtain accurate estimations of the SFR, for a wide range of redshifts, is crucial for building and studying galaxy evolution paths over cosmic time.
Aims: Based on a statistical sample of galaxies, the aim of this pap…
Binary open clusters in the Gaia data
Hu, Qingshun; Esamdin, Ali; Song, Fangfang +1 more
Context. Observations indicate that the fraction of potential binary star clusters in the Milky Way is either the same or lower than that of the Magellanic Clouds. The unprecedented precision in the parallax measurements by Gaia has allowed for the discovery of a growing number of new binary open clusters (OCs).
Aims: We aim to survey the can…
COSMOS2020: Manifold learning to estimate physical parameters in large galaxy surveys
Sanders, D. B.; Ilbert, O.; Moneti, A. +16 more
We present a novel method for estimating galaxy physical properties from spectral energy distributions (SEDs) as an alternative to template fitting techniques and based on self-organizing maps (SOMs) to learn the high-dimensional manifold of a photometric galaxy catalog. The method has previously been tested with hydrodynamical simulations in Davi…
Spatially resolved star-formation relations of dense molecular gas in NGC 1068
Colina, L.; García-Burillo, S.; Fuente, A. +5 more
Context. According to the current understanding of star formation (SF), the regulation of this phenomenon in galaxy disks reflects a complex balance between processes that operate in molecular gas on local cloud scales as well as on global disk scales.
Aims: We analyse the influence of the dynamical environment on the SF relations of the dens…
ESPRESSO observations of HE 0107−5240 and other CEMP-no stars with [Fe/H] ≤ -4.5
Rebolo, R.; Zapatero Osorio, M. R.; Allende Prieto, C. +22 more
Context. HE 0107−5240 is a hyper metal-poor star with [Fe/H] = −5.39, one of the lowest-metallicity stars known. Its stellar atmosphere is enhanced in carbon, with [C/Fe] = +4.0, without a detectable presence of neutron-capture elements. Therefore, it belongs to the carbon-enhanced metal-poor (CEMP−no) group, along with the majority of the most me…
Tidally induced spiral arm wraps encoded in phase space
Anders, F.; Antoja, T.; Bernet, M. +3 more
Context. The impact of Sagittarius and other satellite galaxies such as the Large Magellanic Cloud on our Galaxy and in particular its disc is gradually being disclosed. Simulations tailored to the interaction of the Milky Way (MW) and Sagittarius show rings and spiral arms appearing in the Galaxy disc. However, spiral arms can also be induced by …