Search Publications
Can we use weak lensing to measure total mass profiles of galaxies on 20 kpc scales?
Kobayashi, Masato I. N.; Leauthaud, Alexie; Rhodes, Jason +4 more
Current constraints on dark matter density profiles from weak lensing are typically limited to radial scales greater than 50-100 kpc. In this paper, we explore the possibility of probing the very inner regions of galaxy/halo density profiles by measuring stacked weak lensing on scales of only a few tens of kpc. Our forecasts focus on scales smalle…
Accurate PSF-matched photometry and photometric redshifts for the extreme deep field with the Chebyshev-Fourier functions
Molino, A.; Benítez, N.; Jiménez-Teja, Y. +1 more
Photometric redshifts, which have become the cornerstone of several of the largest astronomical surveys like PanStarrs, DES, J-PAS and LSST, require precise measurements of galaxy photometry in different bands using a consistent physical aperture. This is not trivial, due to the variation in the shape and width of the point spread function (PSF) i…
Search for polycyclic aromatic hydrocarbons in the Perseus molecular cloud with the Green Bank Telescope
Pérez, Laura M.; Maddalena, Ronald J.; Ali-Haïmoud, Yacine +1 more
Polycyclic aromatic hydrocarbons (PAHs) are believed to be the small-size tail of the interstellar carbonaceous dust grain population. Their vibrational emission is the most widely accepted source of the aromatic near-infrared features, and their rotational radiation is a likely explanation for the dust-correlated anomalous microwave emission (AME…
Echelle spectroscopy and photoionization modelling of the entire planetary nebula NGC 6210
Dufour, R. J.; Bohigas, J.; Rodríguez, M. +1 more
High-resolution spectroscopy of NGC 6210, show that recombination line abundances of O+2 and Ne+2 are two to three times larger than forbidden line abundances, Te(O+2) is smaller than Te(N+) and possibly Te(S+), the ionized mass is ≃0.07 M⊙ and the p…
H I study of the environment around ESO 243-49, the host galaxy of an intermediate-mass black hole
Combes, F.; Farrell, S. A.; Servillat, M. +9 more
The lenticular galaxy ESO 243-49 hosts the ultraluminous X-ray source HLX-1, the best candidate intermediate-mass black hole (IMBH) currently known. The environments of IMBHs remain unknown, however, the proposed candidates include the nuclei of dwarf galaxies or globular clusters. Evidence at optical wavelengths points at HLX-1 being the remnant …
Submm-bright X-ray-absorbed QSOs at z ∼ 2: insights into the coevolution of AGN and star formation
Page, M. J.; Symeonidis, M.; Stevens, J. A. +4 more
We have assembled a sample of five X-ray-absorbed and submm-luminous type 1 QSOs at z ∼ 2 which are simultaneously growing their central black holes through accretion and forming stars copiously. We present here the analysis of their rest-frame UV-to-submm spectral energy distributions (SEDs), including new Herschel data. Both AGN (direct and repr…
The contribution of faint galaxy wings to source-subtracted near-infrared background fluctuations
Donnerstein, R. L.
The source-subtracted, 1.1 and 1.6 µm NICMOS images used in earlier analyses of the near-infrared Hubble Ultra Deep Field contained residual flux in extended wings of identified sources that contributed an unknown amount to fluctuation power. When compared to the original results, a reanalysis after subtracting this residual flux shows that …
Constraints on the evolutionary mechanisms of massive galaxies since z ∼ 1 from their velocity dispersions
Pérez-González, P. G.; Falcón-Barroso, J.; Guzmán, R. +9 more
Several authors have reported that the dynamical masses of massive compact galaxies (M* ≳ 1011 M⊙, re ∼ 1 kpc), computed as Mdyn = 5.0 σe2 re/G, are lower than their stellar masses M*. In a previous study from our group, the discrepancy is interprete…
Deep X-ray spectroscopy and imaging of the Seyfert 2 galaxy, ESO 138-G001
Bianchi, S.; Vignali, C.; Piconcelli, E. +4 more
We present a spectral and imaging analysis of the XMM-Newton and Chandra observations of the Seyfert 2 galaxy ESO138-G001, with the aim of characterizing the circumnuclear material responsible for the soft (0.3-2.0 keV) and hard (5-10 keV) X-ray emission. We confirm that the source is absorbed by Compton-thick gas. However, if a self-consistent mo…
A spectroscopically confirmed z = 1.327 galaxy-scale deflector magnifying a z ∼ 8 Lyman-break galaxy in the Brightest of Reionizing Galaxies survey
Treu, T.; Trenti, M.; Oesch, P. A. +6 more
We present a detailed analysis of an individual case of gravitational lensing of a z ∼ 8 Lyman-break galaxy (LBG) in a blank field, identified in Hubble Space Telescope imaging obtained as part of the Brightest of Reionizing Galaxies survey. To investigate the close proximity of the bright (mAB = 25.8) Y098-dropout to a small…