211 citations · 1.2k across the 32 of their papers we have counts for
26 papers · 1 filter
Red supergiant stars in binary systems II. Confirmation of B-type companions of red supergiants in the Small Magellanic Cloud using Hubble ultra-violet spectroscopy
L. R. Patrick, D. J. Lennon, A. Schootemeijer +5
Red supergiant stars (RSGs) represent the final evolutionary phase of the majority of massive stars and hold a unique role in testing the physics of stellar models. Eighty eight RS…
Gaia-ESO Survey: massive stars in the Carina Nebula. A new census of OB stars
S. R. Berlanas, J. Maíz Apellániz, A. Herrero +16
The Gaia-ESO survey sample of massive OB stars in the Carina Nebula consists of 234 stars. The addition of brighter sources from the Galactic O-Star Spectroscopic Survey and additi…
Hunting for red supergiant binaries: UVIT photometry of the SMC
L. R. Patrick, D. Thilker, D. J. Lennon +5
We present UVIT/Astrosat UV photometry of the RSG population of the Small Cloud galaxy (SMC). As RSGs are extremely faint in the far-UV, these observations directly probe potential…
Strong lithium lines in red supergiants at different metallicities
Ignacio Negueruela, Javier Alonso-Santiago, Ricardo Dorda +1
Current models of stellar evolution predict that stars more massive than M should have completely depleted all lithium (Li) in their atmospheres by the time when…
Westerlund 1 under the light of Gaia EDR3: Distance, isolation, extent, and a hidden population
Ignacio Negueruela, Emilio J. Alfaro, Ricardo Dorda +3
(Abridged) We have used Gaia EDR3 data, together with spectra of a large sample of luminous stars in the field surrounding Westerlund 1, to explore the extent of the cluster. We ca…
Red supergiant stars in binary systems. I. Identification and characterisation in the Small Magellanic Cloud from the UVIT ultraviolet imaging survey
L. R. Patrick, D. Thilker, D. J. Lennon +5
We aim to identify and characterise binary systems containing red supergiant (RSG) stars in the Small Magellanic Cloud (SMC) using a newly available ultraviolet (UV) point source c…
On the nature of VX Sagitarii: Is it a TZO, a RSG or a high-mass AGB star?
H. M. Tabernero, R. Dorda, I. Negueruela +1
Aims. We present a spectroscopic analysis of the extremely luminous red star VX Sgr based on high-resolution observations combined with AAVSO light curve data. Given the puzzling c…
Multiplicity among the cool supergiants in the Magellanic Clouds
R. Dorda, L. R. Patrick
The characterisation of the multiplicity of high-mass stars is of fundamental importance to understand their evolution, the diversity of observed core-collapse supernovae and the f…
CARMENES input catalogue of M dwarfs V. Luminosities, colours, and spectral energy distributions
C. Cifuentes, J. A. Caballero, M. Cortes-Contreras +15
The relevance of M dwarfs in the search for potentially habitable Earth-sized planets has grown significantly in the last years. In our on-going effort to comprehensively and accur…
Cluster membership for the long period Cepheid calibrator SV Vul
Ignacio Negueruela, Ricardo Dorda, Amparo Marco
Classical Cepheids represent the first step of the distance scale ladder. Claims of tension between the locally calculated Hubble constant and the values deduced from 's re…
Multiplicity of the red supergiant population in the young massive cluster NGC 330
L. R. Patrick, D. J. Lennon, C. J. Evans +7
The multiplicity properties of massive stars are one of the important outstanding issues in stellar evolution. Quantifying the binary statistics of all evolutionary phases is essen…
An atlas of cool supergiants from the Magellanic Clouds and typical interlopers. A guide for the classification of luminous red stars
Ricardo Dorda, Ignacio Negueruela, Carlos González-Fernández +1
We present an atlas composed of more than 1500 spectra of late-type stars (spectral types from G to M) observed simultaneously in the optical and calcium triplet spectral ranges. T…
Berkeley 51, a young open cluster with four yellow supergiants
Ignacio Negueruela, Maria Monguió, Amparo Marco +3
The heavily obscured open cluster Berkeley~51 shows characteristics typical of young massive clusters, even though the few previous studies have suggested older ages. We combine op…
An LTE effective temperature scale for red supergiants in the Magellanic clouds
H. M. Tabernero, R. Dorda, I. Negueruela +1
We present a self-consistent study of cool supergiants (CSGs) belonging to the Magellanic clouds. We calculated stellar atmospheric parameters using LTE KURUCZ and MARCS atmospheri…
The red supergiant population in the Perseus arm
Ricardo Dorda, Ignacio Negueruela, Carlos González-Fernández
We present a new catalogue of cool supergiants in a section of the Perseus arm, most of which had not been previously identified. To generate it, we have used a set of well-defined…
Confirmation of six Be X-ray binaries in the Small Magellanic Cloud
V. A. McBride, A. Gonzalez-Galan, A. J. Bird +10
The X-ray binary population of the Small Magellanic Cloud (SMC) contains a large number of massive X-ray binaries and the recent survey of the SMC by XMM-Newton has resulted in alm…
Characterisation of red supergiants in the Gaia spectral range
Ricardo Dorda, Carlos González-Fernández, Ignacio Negueruela
The infrared Calcium Triplet and its nearby spectral region have been used for spectral and luminosity classification of late-type stars, but the samples of cool supergiants (CSGs)…
Spectral type, temperature and evolutionary stage in cool supergiants
Ricardo Dorda, Ignacio Negueruela, Carlos González-Fernández +1
In recent years, temperature scales in cool supergiants (CSGs) have been disputed, and the possibility that spectral types (SpTs) do not depend primarily on temperature has been ra…
A long-period Cepheid variable in the starburst cluster VdBH222
J. S. Clark, I. Negueruela, M. E. Lohr +4
Galactic starburst clusters play a twin role in astrophysics, serving as laboratories for the study of stellar physics and also delineating the structure and recent star formation…
The IACOB spectroscopic database: recent updates and first data release
S. Simón-Díaz, I. Negueruela, J. Maíz Apellániz +12
The IACOB project is an ambitious long-term project which is contributing to step forward in our knowledge about the physical properties and evolution of Galactic massive stars. Th…
A new survey of cool supergiants in the Magellanic Clouds
Carlos González-Fernández, Ricardo Dorda, Ignacio Negueruela +1
In this study, we conduct a pilot program aimed at the red supergiant population of the Magellanic Clouds. We intend to extend the current known sample to the unexplored low end of…
Orbital and physical properties of the Ori Aa,Ab,B triple system
Simón-Díaz, J. A. Caballero, J. Lorenzo +11
We provide a complete characterization of the astrophysical properties of the Ori Aa,Ab,B hierarchical triple system, and an improved set of orbital parameters for the highly e…
VdBH 222: a starburst cluster in the inner Milky Way
A. Marco, I. Negueruela, C. González-Fernández +3
It has been suggested that the compact open cluster VdBH 222 is a young massive distant object. We set out to characterise VdBH 222 using a comprehensive set of multi-wavelength ob…
The supergiant B[e] star LHA 115-S 18 - binary and/or luminous blue variable?
J. S. Clark, E. S. Bartlett, M. J. Coe +5
The mechanism by which supergiant (sg)B[e] stars support cool, dense dusty discs/tori and their physical relationship with other evolved, massive stars such as luminous blue variab…