453 citations · 5.6k across the 136 of their papers we have counts for
31 papers · 1 filter
GA-NIFS view of LAP1: Assembly of Pop~III stellar clusters during EoR
J. Scholtz, R. Maiolino, S. Carniani +28
Lensed and Pristine 1 (LAP1) is one of the most promising candidates for the detection of so-called Pop~III stars at . In this work, we present new high-spectral-resoluti…
Irony at z=6.68: a bright AGN with forbidden Fe emission and multi-component Balmer absorption
Francesco D'Eugenio, Erica Nelson, Xihan Ji +11
We present the deepest medium-resolution JWST/NIRSpec spectroscopy to date of a bright Little Red Dot (LRD) AGN, Irony at z=6.68. The data reveal broad Balmer emission from H-H$…
Lord of LRDs: Insights into a "Little Red Dot" with a low-ionization spectrum at z = 0.1
Xihan Ji, Francesco D'Eugenio, Ignas Juodžbalis +14
Recent observations by the James Webb Space Telescope (JWST) have revealed a puzzling population of optically red and compact galaxies with peculiar "V"-shaped spectra at high reds…
Low dust mass and high star-formation efficiency at from deep ALMA observations
Ikki Mitsuhashi, Jorge A. Zavala, Tom J. L. C. Bakx +15
We investigate the dust mass build-up and star formation efficiency of two galaxies at , GHZ2 and GS-z14-0, by combining ALMA and JWST observations with an analytical model t…
ALMA detection of [OIII] 88um at z=12.33: Exploring the Nature and Evolution of GHZ2 as a Massive Compact Stellar System
Jorge A. Zavala, Tom Bakx, Ikki Mitsuhashi +21
We present ALMA observations on the high-redshift galaxy GHZ2 and report a successful detection of the rest-frame 88um atomic transition from doubly-ionized Oxygen at z=12.3327+/-0…
Physical properties of circumnuclear ionising clusters. III. Kinematics of gas and stars in NGC 7742
S. Zamora, A. I. Díaz, Roberto Terlevich +2
In this third paper of a series, we study the kinematics of the ionised gas and stars, calculating the dynamical masses of the circumnuclear star-forming regions in the ring of of…
A luminous and young galaxy at z=12.33 revealed by a JWST/MIRI detection of Hα and [OIII]
Jorge A. Zavala, Marco Castellano, Hollis B. Akins +37
The James Webb Space Telescope (JWST) has discovered a surprising population of bright galaxies in the very early universe (<500 Myrs after the Big Bang) that is hard to explain wi…
Spatially-resolved properties of the ionized gas in the HII galaxy J084220+115000
D. Fernández-Arenas, E. Carrasco, R. Terlevich +20
We present a spatially resolved spectroscopic study for the metal poor HII galaxy J084220+115000 using MEGARA Integral Field Unit observations at the Gran Telescopio Canarias. We e…
PASSAGES: The Large Millimeter Telescope and ALMA Observations of Extremely Luminous High Redshift Galaxies Identified by the Planck
Derek A. Berman, Min S. Yun, K. C. Harrington +20
The Planck All-Sky Survey to Analyze Gravitationally-lensed Extreme Starbursts (PASSAGES) project aims to identify a population of extremely luminous galaxies using the Planck All-…
MEGARA-IFU detection of extended HeII4686 nebular emission in the central region of NGC1569 and its ionization budget
Y. D. Mayya, E. Carrasco, V. M. A. Gomez-Gonzalez +21
We here report the detection of extended HeII4686 nebular emission in the central region of NGC1569 using the integral field spectrograph MEGARA at the 10.4-m Gran Telescopio Canar…
Internal kinematics of giant H II regions in M101 with the Keck Cosmic Web Imager
Fabio Bresolin, Luca Rizzi, I-Ting Ho +6
We study the kinematics of the giant H II regions NGC 5455 and NGC 5471 located in the galaxy M101, using integral field observations that include the Hbeta and [O III] 5007 emissi…
Supersonic turbulence in Giant HII Regions: clues from 30 Doradus
Jorge Melnick, Guillermo Tenorio-Tagle, Eduardo Telles
The tight correlation between turbulence and luminosity in Giant HII Regions is not well understood. While the luminosity is due to the UV radiation from the massive stars in the i…
Independent Cosmological Constraints from high-z HII Galaxies
Ana Luisa González-Morán, Ricardo Chávez, Roberto Terlevich +7
We present new high spectral resolution observations of 15 high-z ( z ) HII Galaxies (HIIG) obtained with MOSFIRE at the Keck Observatory. These data, combined…
A Bayesian direct method implementation to fit emission line spectra: Application to the primordial He abundance determination
Vital Fernández, Elena Terlevich, Angeles I. Díaz +1
This work presents a Bayesian algorithm to fit the recombination and collisionally excited line spectra of gas photoionized by clusters of young stars. The current model consists i…
New GTC Spectroscopic Data and a Statistical Study to Better Constrain the Redshift of the BL Lac RGB J2243+203
D. Rosa González, H. Muriel, Y. D. Mayya +13
We present new spectroscopic data of the BL Lac RGB 2243+203, and its surroundings, obtained with the OSIRIS Multi Object Spectrograph (MOS) mounted in the Gran Telescopio Canarias…
From Giant H II regions and H II galaxies to globular clusters and compact dwarf ellipticals
Elena Terlevich, David Fernández-Arenas, Roberto Terlevich +3
Massive starforming regions like Giant HII Regions (GHIIR) and HII Galaxies (HIIG) are emission line systems ionized by compact young massive star clusters (YMC) with masses rangin…
Optical/Near-IR spatially resolved study of the H II galaxy Tol 02
Ana Torres-Campos, Elena Terlevich, Daniel Rosa-González +3
The main goal of this study is to characterise the stellar populations in very low metallicity galaxies. We have obtained broad U, B, R, I, J, H, K, intermediate Strömgren y and na…
GTC Observations of an Overdense Region of LAEs at z=6.5
K. Chanchaiworawit, R. Guzmán, J. M. Rodríguez Espinosa +12
We present the results of our search for the faint galaxies near the end of the Reionisation Epoch. This has been done using very deep OSIRIS images obtained at the Gran Telescopio…
The L - σ relation for HII galaxies in green
Jorge Melnick, Eduardo Telles, Vinicius Bordalo +7
The correlation between emission-line luminosity (L) and profile width (sigma) for HII Galaxies provides a powerful method to measure the distances to galaxies over a wide range of…
On the Redshifts of the BL Lac 3FGL J0909.0+2310 and its Close Companion
D. Rosa-Gonzalez, S. Coutiño de Leon, Y. D. Mayya +10
We report on the redshift of the BL Lac object 3FGL J0909.0+2310 based on observations obtained with the OSIRIS Multi Object Spectrograph (MOS) mounted on the 10.4-m Gran Telescopi…
Direct measurement of lensing amplification in Abell S1063 using a strongly lensed high redshift HII Galaxy
Roberto Terlevich, Jorge Melnick, Elena Terlevich +9
ID11 is an actively star forming extremely compact galaxy and Ly alpha emitter at z=3.117 that is gravitationally magnified by a factor of ~17 by the cluster of galaxies Hubble Fro…
Early Science with the Large Millimeter Telescope: Observations of Extremely Luminous High-z Sources Identified by Planck
K. C. Harrington, Min S. Yun, R. Cybulski +17
We present 8.5 arcsec resolution 1.1mm continuum imaging and CO spectroscopic redshift measurements of eight extremely bright submillimetre galaxies identified from the Planck and…
Early Science with the Large Millimeter Telescope: CO and [C II] Emission in the z=4.3 AzTEC J095942.9+022938 (COSMOS AzTEC-1)
Min S. Yun, I. Aretxaga, M. A. Gurwell +27
Measuring redshifted CO line emission is an unambiguous method for obtaining an accurate redshift and total cold gas content of optically faint, dusty starburst systems. Here, we r…
Nature or nurture? Clues from the distribution of specific star formation rates in SDSS galaxies
Javier Casado, Yago Ascasibar, Marta Gavilán +4
This work investigates the main mechanism(s) that regulate the specific star formation rate (SSFR) in nearby galaxies, cross-correlating two proxies of this quantity -- the equival…