Publications (26)
Gas condensation in Brightest Group Galaxies unveiled with MUSE
V. Olivares, P. Salome, S. L. Hamer +18
The origin of the cold gas in central galaxies in groups is still a matter of debate. We present Multi-Unit Spectroscopic Explorer (MUSE) observations of 18 optically selected loca…
The Faber-Jackson relation for early-type galaxies: Dependence on the magnitude range
A. Nigoche-Netro, J. A. L. Aguerri, P. Lagos +3
We take a sample of early-type galaxies from the Sloan Digital Sky Survey (SDSS-DR7, 90 000 galaxies) spanning a range of approximately 7 in both and filters a…
Exploring the effects of diffuse ionised gas in two local analogues of high-redshift star-forming galaxies
P. Lagos, A. Nigoche-Netro, T. C. Scott +2
Aims. We investigate the impact of diffuse ionised gas (DIG) on the determination of emission line ratios and gas-phase metallicities in two local analogues of high-redshift star-f…
Arp 202: a TDG formed in a parent's extended dark matter halo?
T. C. Scott, P. Lagos, S. Ramya +6
We report on H + [NII] imaging of the Arp 202 interacting pair and its tidal dwarf galaxy (TDG) candidate as well as a GMOS long slit spectrum from the TDG candidate, observed…
Resolved HI in two ultra-diffuse galaxies from contrasting non-cluster environments
T. C. Scott, Chandreyee Sengupta, P. Lagos +2
We report on the first resolved HI observations of two blue ultra-diffuse galaxies (UDGs)using the Giant Metrewave Radio Telescope (GMRT). These observations add to the sofar limit…
FGC 1287 and its enigmatic 250 kpc long HI tail in the outskirts of Abell 1367
T. C. Scott, L. Cortese, P. Lagos +3
We present HI and radio continuum, narrow-band H imaging, IFU spectroscopy, and X-ray observations of the FGC 1287 triplet projected 1.8 Mpc west of the galaxy cluster A…
Witnessing the transformation of a quasar host galaxy at z=1.6
A. Humphrey, N. Roche, J. M. Gomes +9
A significant minority of high redshift radio galaxy (HzRG) candidates show extremely red broad band colours and remain undetected in emission lines after optical `discovery' spect…
Gemini GMOS--IFU spectroscopy of the compact HII galaxies Tol 0104-388 and Tol 2146-391: The dependence on the properties of the interstellar medium
P. Lagos, E. Telles, A. Nigoche-Netro +1
Using GMOS--IFU spectroscopic observations of the compact HII/BCD galaxies Tol 0104-388 and Tol 2146-391, we study the spatial distribution of emission lines, equivalent width EW(H…
Carbon-loud SDSS BOSS QSO2s at z > 2: High density gas or secondary production of Carbon?
M. Silva, A. Humphrey, P. Lagos +1
We study the ultraviolet (UV) emission-line ratios of a sample of 145 type II quasars (QSO2s) from Sloan Digital Sky Survey III Baryon Oscillation Spectroscopic Survey, and compare…
Dark matter inside early-type galaxies as function of mass and redshift
A. Nigoche-Netro, G. Ramos-Larios, P. Lagos +6
We study the behaviour of the dynamical and stellar mass inside the effective radius (re) of early-type galaxies (ETGs). We use several samples of ETGs -ranging from 19 000 to 98 0…
On the properties of the interstellar medium in extremely metal-poor blue compact dwarf galaxies. A VIMOS-IFU study of the cometary galaxy and Ly absorber Tol 65
P. Lagos, R. Demarco, P. Papaderos +5
In this study we present high-resolution VIsible Multi-Object Spectrograph integral field unit spectroscopy (VIMOS-IFU) of the extremely metal-poor HII/blue compact dwarf (BCD) gal…
Ionization and feedback in Ly halos around two radio galaxies at z2.5
S. G. Morais, A. Humphrey, M. Villar-MartÃn +6
We present new spectroscopic observations of two high redshift radio galaxies, TXS 0211-122 (z=2.34) and TXS 0828+193 (z=2.57), known to be associated with large Ly halos. The…
The quantity of dark matter in early-type galaxies and its relation to the environment
A. Nigoche-Netro, G. Ramos-Larios, P. Lagos +5
We study the behavior of the dynamical and stellar mass inside the effective radius of early-type galaxies (ETGs) as a function of environment considering Newtonian dynamics, diffe…
The MUSE 3D view of feedback in a high-metallicity radio galaxy at z = 2.9
M. Silva, A. Humphrey, P. Lagos +8
We present a detailed study of the kinematic, chemical and excitation properties of the giant Ly emitting nebula and the giant \ion{H}{I} absorber associated with the $z = 2.92…
Extremely Metal-Poor Galaxies: The HI Content
M. E. Filho, B. Winkel, Sánchez Almeida +12
Extremely metal-poor (XMP) galaxies are chemically, and possibly dynamically, primordial objects in the local Universe. Our objective is to characterize the HI content of the XMP g…
HI in high gas-phase metallicity dwarf galaxy WISEA J230615.06+143927.9
Yan Guo, C. Sengupta, T. C. Scott +2
We present resolved GMRT HI observations of the high gas-phase metallicity dwarf galaxy WISEA J230615.06+143927.9 (z = 0.005) (hereafter J2306) and investigate whether it could be…
Spatially-resolved properties of early-type group-dominant galaxies with MUSE: gas content, ionisation mechanisms and metallicity gradients
P. Lagos, S. I. Loubser, T. C. Scott +6
With the goal of a thorough investigation of the ionised gas and its origin in early-type group-dominant galaxies, we present archival MUSE data for 18 galaxies from the Complete L…
Virial masses of late type galaxies from the SDSS DR16
A. Nigoche-Netro, E. de la Fuente, R. J. Diaz +6
Motivated by the challenges of calculating the dynamical masses of late-type galaxies (LTGs) and the enormous amount of data from the Sloan Digital Sky Survey (SDSS), we calculate…
Merger histories of brightest group galaxies from MUSE stellar kinematics
S. I. Loubser, P. Lagos, A. Babul +4
Using Multi-Unit Spectroscopic Explorer (MUSE) spectroscopy, we analyse the stellar kinematics of 18 brightest group early-type (BGEs) galaxies, selected from the Complete Local-Vo…
Detection of large scale Ly absorbers at large angles to the radio axis of high-redshift radio galaxies using SOAR
M. Silva, A. Humphrey, P. Lagos +4
We present an investigation of the properties of the extended Ly halo and the large-scale \ion{H}{I} absorbing structures associated with 5 high-redshift radio galaxies at z $>…
How much dark matter is there inside early-type galaxies?
A. Nigoche-Netro, A. Ruelas-Mayorga, P. Lagos +5
We study the luminous mass as a function of the dynamical mass inside the effective radius (r_e) of early-type galaxies (ETGs) to search for differences between these masses. We as…
The intrinsic dispersion of the Faber-Jackson relation for early-type galaxies as function of the mass and redshift
A. Nigoche-Netro, J. A. L. Aguerri, P. Lagos +4
Aims. Recently it has been reported that the intrinsic dispersion at constant magnitude of the structural relations from early-type galaxies is a useful tool to study the universal…
Detecting metal-poor gas accretion in the star-forming dwarf galaxies UM 461 and Mrk 600
P. Lagos, T. C. Scott, A. Nigoche-Netro +3
Using VIMOS-IFU observations, we study the interstellar medium (ISM) of two star-forming dwarf galaxies, UM 461 and Mrk 600. Our aim was to search for the existence of metallicity…
On the properties of the interstellar medium in extremely metal-poor blue compact dwarf galaxies: GMOS-IFU spectroscopy and SDSS photometry of the double-knot galaxy HS 2236+1344
P. Lagos, P. Papaderos, J. M. Gomes +3
The main goal of this study is to carry out a spatially resolved investigation of the warm interstellar medium (ISM) in the extremely metal-poor Blue Compact Dwarf (BCD) galaxy HS…
Tracing Galaxy Evolution in the Nearby Universe: The Role of Dark Matter
A. Nigoche-Netro, P. Lagos, R. J. Diaz +6
Using a sample of 126000 late-type galaxies from the SDSS, we analyzed stellar mass as a function of the dynamical mass. Stellar masses are estimated using eight stellar population…
GTC optical imaging of extremely red 5C radio galaxies at high redshift
A. Humphrey, M. Villar-MartÃn, P. Lagos
We investigate the nature of seven unusual radio galaxies from the 5C catalogue that were previously known to have extremely red R-K colours, and for which emission lines were prev…