Search Publications
A new method to correct for host star variability in multiepoch observations of exoplanet transmission spectra
Fortney, Jonathan J.; Stevenson, Kevin B.; Désert, Jean-Michel +5 more
Transmission spectra of exoplanets orbiting active stars suffer from wavelength-dependent effects due to stellar photospheric heterogeneity. WASP-19b, an ultra-hot Jupiter (Teq ~ 2100 K), is one such strongly irradiated gas-giant orbiting an active solar-type star. We present optical (520-900 nm) transmission spectra of WASP-19b obtaine…
The Three Hundred project: dissecting the Fundamental Plane of galaxy clusters up to z = 1
Cui, Weiguang; Umetsu, Keiichi; Meneghetti, Massimo +2 more
We perform a systematic study of the recently discovered Fundamental Plane of galaxy clusters (CFP) using ~250 simulated clusters from The Three Hundred project, focusing on the stability of the plane against different temperature definitions and its dependence on the dynamical relaxation state of clusters. The CFP is characterized by $T\propto M_…
On the precision of full-spectrum fitting of simple stellar populations - IV. A systematic comparison with results from colour-magnitude diagrams
Goudfrooij, Paul; Asa'd, Randa; As'ad, A. M.
In this fourth paper of a series on the precision of ages of stellar populations obtained through the full-spectrum fitting technique, we present a first systematic analysis that compares the age, metallicity, and reddening of star clusters obtained from resolved and unresolved data [namely colour-magnitude diagrams (CMDs) and integrated-light spe…
Gas inflows in the polar ring of NGC 4111: the birth of an AGN
Lützgendorf, Nora; Ma, Chung-Pei; Gebhardt, Karl +14 more
We have used Hubble Space Telescope (HST) images, SAURON Integral Field Spectroscopy (IFS), and adaptative optics assisted Gemini NIFS near-infrared K-band IFS to map the stellar and gas distribution, excitation and kinematics of the inner few kpc of the nearby edge-on S0 galaxy NGC 4111. The HST images map its ≈450 pc diameter dusty polar ring, w…
YOUNG Star detrending for Transiting Exoplanet Recovery (YOUNGSTER) - II. Using self-organizing maps to explore young star variability in sectors 1-13 of TESS data
Armstrong, David J.; Pollacco, Don; Battley, Matthew P.
Young exoplanets and their corresponding host stars are fascinating laboratories for constraining the time-scale of planetary evolution and planet-star interactions. However, because young stars are typically much more active than the older population, in order to discover more young exoplanets, greater knowledge of the wide array of young star va…
IFU observations of the inner 200 pc of NGC 4546: gas rotation, non-circular motions, and ionized outflows
Riffel, Rogemar A.; Heckler, Kelly F.; Ricci, Tiago V.
We present a detailed analysis of the ionized gas distribution and kinematics in the inner ~ 200 pc of NGC 4546, host of a low-luminosity active galactic nucleus (LLAGN). Using GMOS-IFU observations, with a spectral coverage of 4736-6806 Å and an angular resolution of 0.7 arcsec, we confirm that the nuclear emission is consistent with photoionizat…
The local universe in the era of large surveys - II. multi-wavelength characterization of activity in nearby S0 galaxies
del Olmo, A.; Jiménez-Palau, C.; Solanes, J. M. +2 more
This is the second paper in a series using data from tens of thousands S0 galaxies of the local Universe (z ≲ 0.1) retrieved from the NASA-Sloan Atlas. It builds on the outcomes of the previous work, which introduced a new classification scheme for these objects based on the principal component analysis (PCA) of their optical spectrum and its proj…
The nature of the Cygnus extreme B supergiant 2MASS J20395358+4222505
Lennon, D. J.; Herrero, A.; Comerón, F. +19 more
2MASS J20395358+4222505 is an obscured early B supergiant near the massive OB star association Cygnus OB2. Despite its bright infrared magnitude (Ks = 5.82) it has remained largely ignored because of its dim optical magnitude (B = 16.63, V = 13.68). In a previous paper, we classified it as a highly reddened, potentially extremely lumino…
Study on the magnetic field strength of NGC 300 ULX1
Li, Z. S.; Pan, Y. Y.; Zhong, J. X. +1 more
NGC 300 ULX1 is a pulsating ultraluminous X-ray source (PULX) with the longest spin period of $P\simeq 31.6\, \rm s$ and a high spin-up rate of $\dot{P}\simeq -5.56\times 10^{-7}\, \rm s\, s^{-1}$ that is ever seen in the confirmed PULXs. In this paper, the inferred magnetic field of NGC 300 ULX1 is $\sim 3.0\times 10^{14}\, \rm G$ using the recen…
A multiwavelength study of the H II region G347.600 + 00.211 and its effects on the surrounding medium
Molina Lera, J. A.; Gamen, R.; Cichowolski, S. +3 more
We present a multiwavelength investigation of the H II region G347.600+00.211, located at a distance of 7.9 kpc. We analyse the gas and dust properties aiming to disentangle the origin of the region as well as its role in the formation of new stars. G347.600 + 00.211 is very conspicuous at 1420 MHz and infrared wavelengths, showing an incomplete s…