Publications


Nuclear molecular outflow in the Seyfert galaxy NGC3227

ASTRONOMY & ASTROPHYSICS 628 (2019) ARTN A65

A Alonso-Herrero, S Garcia-Burillo, M Pereira-Santaella, RI Davies, F Combes, M Vestergaard, SI Raimundo, A Bunker, T Diaz-Santos, P Gandhi, I Garcia-Bernete, EKS Hicks, SF Honig, LK Hunt, M Imanishi, T Izumi, NA Levenson, W Maciejewski, C Packham, C Ramos Almeida, C Ricci, D Rigopoulou, PF Roche, D Rosario, M Schartmann, A Usero, MJ Ward


Optical integral field spectroscopy of intermediate redshift infrared bright galaxies

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) (0)

M Pereira-Santaella, D Rigopoulou, GE Magdis, N Thatte, A Alonso-Herrero, F Clarke, D Farrah, S García-Burillo, L Hogan, S Morris, M Rodrigues, J-S Huang, M Tecza

The extreme infrared (IR) luminosity of local luminous and ultra-luminous IR galaxies (U/LIRGs; 11 < log LIR /Lsun < 12 and log LIR /Lsun > 12, respectively) is mainly powered by star-formation processes triggered by mergers or interactions. While U/LIRGs are rare locally, at z > 1, they become more common, they dominate the star-formation rate (SFR) density, and a fraction of them are found to be normal disk galaxies. Therefore, there must be an evolution of the mechanism triggering these intense starbursts with redshift. To investigate this evolution, we present new optical SWIFT integral field spectroscopic H{\alpha}+[NII] observations of a sample of 9 intermediate-z (0.2 < z < 0.4) U/LIRG systems selected from Herschel 250{\mu}m observations. The main results are the following: (a) the ratios between the velocity dispersion and the rotation curve amplitude indicate that 10-25% (1-2 out of 8) might be compatible with being isolated disks while the remaining objects are interacting/merging systems; (b) the ratio between un-obscured and obscured SFR traced by H{\alpha} and LIR, respectively, is similar in both local and these intermediate-z U/LIRGs; and (c) the ratio between 250{\mu}m and the total IR luminosities of these intermediate-z U/LIRGs is higher than that of local U/LIRGs with the same LIR . This indicates a reduced dust temperature in these intermediate-z U/LIRGs. This, together with their already measured enhanced molecular gas content, suggests that the interstellar medium conditions are different in our sample of intermediate-z galaxies when compared to local U/LIRGs.


On the Observed Diversity of Star Formation Efficiencies in Giant Molecular Clouds

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 468 (2019) 5482-5491

K Grisdale, O Agertz, F Renaud, AB Romeo, J Devriendt, A Slyz

Observations find a median star formation efficiency per free-fall time in Milky Way Giant Molecular Clouds (GMCs) on the order of $\epsilon_{\rm ff}\sim 1\%$ with dispersions of $\sim0.5\,{\rm dex}$. The origin of this scatter in $\epsilon_{\rm ff}$ is still debated and difficult to reproduce with analytical models. We track the formation, evolution and destruction of GMCs in a hydrodynamical simulation of a Milky Way-like galaxy and by deriving cloud properties in an observationally motivated way, measure the distribution of star formation efficiencies which are in excellent agreement with observations. We find no significant link between $\epsilon_{\rm ff}$ and any measured global property of GMCs (e.g. gas mass, velocity dispersion). Instead, a wide range of efficiencies exist in the entire parameter space. From the cloud evolutionary tracks, we find that each cloud follow a \emph{unique} evolutionary path which gives rise to wide diversity in all properties. We argue that it is this diversity in cloud properties, above all else, that results in the dispersion of $\epsilon_{\rm ff}$.


Emission from the circumgalactic medium: from cosmological zoom-in simulations to multiwavelength observables

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 489 (2019) 2417-2438

R Augustin, S Quiret, B Milliard, C Peroux, D Vibert, I Blaizot, Y Rasera, R Teyssier, S Frank, J-M Deharveng, V Picouet, DC Martin, ET Hamden, N Thatte, MP Santaella, L Routledge, S Zieleniewski


Torus model properties of an ultra-hard X-ray selected sample of Seyfert galaxies

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 486 (2019) 4917-4935

I Garcia-Bernete, CR Almeida, A Alonso-Herrero, MJ Ward, JA Acosta-Pulido, M Pereira-Santaella, A Hernan-Caballero, A Asensio Ramos, O Gonzalez-Martin, NA Levenson, S Mateos, FJ Carrera, C Ricci, P Roche, I Marquez, C Packham, J Masegosa, L Fuller


PAHs as tracers of the molecular gas in star-forming galaxies

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 482 (2019) 1618-1633

I Cortzen, J Garrett, G Magdis, D Rigopoulou, F Valentino, M Pereira-Santaella, F Combes, A Alonso-Herrero, S Toft, E Daddi, D Elbaz, C Gomez-Guijarro, M Stockmann, J Huang, C Kramer


Can the European ELT detect super-Earths? Measuring the contrast limit of an image-slicer spectrograph in a laboratory experiment: an update on progress

ADVANCES IN OPTICAL AND MECHANICAL TECHNOLOGIES FOR TELESCOPES AND INSTRUMENTATION III 10706 (2018) ARTN 107061N

RM Barnsley, M Tecza


Simulating Surveys for ELT-MOSAIC: Status of the MOSAIC Science Case after Phase A

GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY VII 10702 (2018) UNSP 107028R

M Puech, CJ Evans, K Disseau, J Japelj, OH Ramirez-Agudelo, H Rahmani, M Trevisan, JL Wang, M Rodrigues, R Sanchez-Janssen, Y Yang, F Hammer, L Kaper, SL Morris, B Barbuy, J-G Cuby, G Dalton, E Fitzsimons, P Jagourel, MOSAICS Team


Trade-offs in the visible spectrograph of the ELT instrument MOSAIC

GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY VII 10702 (2018) UNSP 107029F

AW Janssen, E Sokolova, J Pragt, J Kragt, R Navarro, N Tromp, E Fitzsimons, M Rodrigues, M Larrieu, A Kelz, T Morris, P Jagourel, F Chemla, L Kaper, G Dalton


Product assurance for instrumental projects in research laboratory: galaxies, etoiles, physique, instrumentation (GEPI)

MODELING, SYSTEMS ENGINEERING, AND PROJECT MANAGEMENT FOR ASTRONOMY VIII 10705 (2018) UNSP 107051V

FDF Laadim, P Jagourel, M Frotin, F Hammer, M Rodrigues, M Puech, I Guinouard, F Chemla, Y Yang, E Fitzsimons, P Parr-Burman, T Morris, M Dubbeldam, M Close, K Middleton, G Rousset, A Kelz, A Janssen, J Pragt, R Navarro, M Larrieu, K El Hadi, K Doelhen, G Dalton, I Lewis


The polishing of WEAVE spectrograph collimator mirror

ADVANCES IN OPTICAL AND MECHANICAL TECHNOLOGIES FOR TELESCOPES AND INSTRUMENTATION III 10706 (2018) ARTN 107060J

R Izazaga, E Carrasco, A Hidalgo, G Dalton, S Trager, JAL Aguerri, P Bonifacio, A Vallenari, DC Abrams, K Middleton


WEAVE spectrograph cameras: the polishing of the spherical lenses

ADVANCES IN OPTICAL AND MECHANICAL TECHNOLOGIES FOR TELESCOPES AND INSTRUMENTATION III 10706 (2018) ARTN 107063J

R Izazaga, E Carrasco, A Hidalgo, D Aguirre, E Terlevich, R Terlevich, G Dalton, S Trager, JAL Aguerri, P Bonifacio, A Vallenari, D Carlos Abrams, K Middleton


On the far-infrared metallicity diagnostics: applications to high-redshift galaxies

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 473 (2018) 20-29

D Rigopoulou, M Pereira-Santaella, GE Magdis, A Cooray, D Farrah, R Marques-Chaves, I Perez-Fournon, D Riechers


The Pre-Optics mechanism prototypes for HARMONI

ADVANCES IN OPTICAL AND MECHANICAL TECHNOLOGIES FOR TELESCOPES AND INSTRUMENTATION III 10706 (2018)

E Hernandez, JV Gigante, LF Rodriguez, JM Herreros, B Garcia-Lorenzo, E Mediavilla, N Thatte, I Bryson, H Schnetler, F Clarke, M Tecza


Near infrared throughput and stray light measurements of diffraction gratings for ELT-HARMONI

ADVANCES IN OPTICAL AND MECHANICAL TECHNOLOGIES FOR TELESCOPES AND INSTRUMENTATION III 10706 (2018)

JI Capone, M Rodrigues, F Clarke, A Earle, T Foster, AH Valadez, I Lewis, J Lynn, K O'Brien, M Tecza, N Thatte, I Tosh


The KMOS Cluster Survey (KCS). II. The Effect of Environment on the Structural Properties of Massive Cluster Galaxies at Redshift 1.39 < z < 1.61

ASTROPHYSICAL JOURNAL 856 (2018) ARTN 8

JCC Chan, A Beifiori, RP Saglia, JT Mendel, JP Stott, R Bender, A Galametz, DJ Wilman, M Cappellari, RL Davies, RCW Houghton, LJ Prichard, IJ Lewis, R Sharples, M Wegner


Most pseudo-bulges can be formed at later stages of major mergers

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 473 (2018) 2521-2541

T Sauvaget, F Hammer, M Puech, YB Yang, H Flores, M Rodrigues


High resolution imaging of the magnetic field in the central parsec of the Galaxy

Planetary and Space Science (2018)

PF Roche, E Lopez-Rodriguez, CM Telesco, R Schödel, C Packham

© 2018 We discuss a high resolution (FWHM∼0.45 arcsec) image of the emissive polarization from warm dust in the minispiral in the Galactic Centre and discuss the implications for the magnetic field in the dusty filaments. The image was obtained at a wavelength of 12.5 μm with the CanariCam multimode mid-infrared imager on the Gran Telescopio Canarias. It confirms the results obtained from previous observations but also reveals new details of the polarization structures. In particular, we identify regions of coherent magnetic field emission at position angles of ∼45o to the predominantly north–south run of field lines in the Northern Arm which may be related to orbital motions inclined to the general flow of the Northern Arm. The luminous stars that have been identified as bow-shock sources in the Northern Arm do not disrupt or dilute the field but are linked by a coherent field structure, implying that the winds from these objects may push and compress the field but do not overwhelm it. The magnetic field in the low surface brightness regions in the East-West Bar to the south of SgrA* lies along the Bar, but the brighter regions generally have different polarization position angles, suggesting that they are distinct structures. In the region of the Northern Arm sampled here, there is only a weak correlation between the intensity of the emission and the degree of polarization. This is consistent with saturated grain alignment where the degree of polarization depends on geometric effects, including the angle of inclination of the field to the line of sight and superposition of filaments with different field directions, rather than the alignment efficiency.


Resolving Star Formation on Subkiloparsec Scales in the High-redshift Galaxy SDP.11 Using Gravitational Lensing

ASTROPHYSICAL JOURNAL 867 (2018) ARTN 140

C Lamarche, A Verma, A Vishwas, GJ Stacey, D Brisbin, C Ferkinhoff, T Nikola, SJU Higdon, J Higdon, M Tecza


The hardware control system for WEAVE at the William Herschel telescope

GROUND-BASED AND AIRBORNE TELESCOPES VII 10700 (2018) ARTN 1070033

J Miguel Delgado, S Menendez Mendoza, J Alonso Burgal, J Miguel Herreros, S Pico, D Carlos Abrams, C Martin, D Cano, FJ Gribbin, J Skvarc, K Dee, E Lhome, G Dalton, K Middleton, S Trager, JAL Aguerri, P Bonifacio, A Vallenari, E Carrasco

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