Search Publications
Surface brightness profiles of blue compact dwarf galaxies in the GOODS-N and GOODS-S field
Kong, X.; Lian, J. H.; Jiang, N. +2 more
We investigate the structural properties of the underlying hosts of 34 blue compact dwarf (BCD) galaxies with deep near-infrared (NIR) photometry. The BCD sample is selected from the Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey in the Great observatories origins Deep Survey North and South fields. We extract the surface brightness prof…
Spectroscopic characterization of X-ray emitting young stars associated with the Sh 2-296 nebula
Montmerle, T.; Gregorio-Hetem, J.; Fernandes, B. +1 more
We studied a sample of stars associated with the Sh 2-296 nebula, part of the reflection nebulae complex in the region of Canis Major R1 (CMa R1). Our sample corresponds to optical counterparts of X-ray sources detected from observations with the XMM-Newton satellite, which revealed dozens of possible low-mass young stars not yet known in this reg…
A consistent spectral model of WR 136 and its associated bubble NGC 6888
Morisset, C.; Mesa-Delgado, A.; Peña, M. +1 more
We analyse whether a stellar atmosphere model computed with the code CMFGEN provides an optimal description of the stellar observations of WR 136 and simultaneously reproduces the nebular observations of NGC 6888, such as the ionization degree, which is modelled with the PYCLOUDY code. All the observational material available (far- and near-UV and…
Chandra identification of two AGN discovered by INTEGRAL
Rahoui, Farid; Bodaghee, Arash; Tomsick, John A. +5 more
Here, we report on observations of two hard X-ray sources that were originally discovered with the INTEGRAL satellite: IGR J04059+5416 and IGR J08297-4250. We use the Chandra X-ray Observatory to localize the sources and then archival near-IR images to identify the counterparts. Both sources have counterparts in the catalogue of extended 2 Micron …
Mid-infrared spectroscopy of the Andromeda galaxy
Barmby, P.; Smith, D. A.; Fazio, G. G. +6 more
We present Spitzer/Infrared Spectrograph (IRS) 5-21 µm spectroscopic maps towards 12 regions in the Andromeda galaxy (M31). These regions include the nucleus, bulge, an active region in the star-forming ring and nine other regions chosen to cover a range of mid-to-far-infrared colours. In line with previous results, polycyclic aromatic hydro…
Nature or nurture of coplanar Tatooines: the aligned circumbinary Kuiper Belt analogue around HD 131511.
Kennedy, G. M.
A key discovery of the Kepler mission is of the circumbinary planets known as `Tatooines', which appear to be well aligned with their host stars' orbits. Whether this alignment is due to initially coplanar circumbinary planet-forming discs (i.e. nature), or subsequent alignment of initially misaligned discs by warping the inner disc or torquing th…
Mid-infrared luminosity function of local star-forming galaxies in the North Ecliptic Pole-Wide survey field of AKARI
Goto, Tomotsugu; Kim, Seong Jin; Im, Myungshin +6 more
We present mid-infrared (MIR) luminosity functions (LFs) of local (z < 0.3) star-forming (SF) galaxies in the AKARI's North Ecliptic Pole (NEP)-Wide survey field. In order to derive more accurate LF, we used spectroscopic sample only. Based on the NEP-Wide point source catalogue containing a large number of infrared (IR) sources distributed ove…
Constraints to the magnetospheric properties of T Tauri stars - II. The Mg II ultraviolet feature
López-Martínez, Fatima; Gómez de Castro, Ana Inés
The atmospheric structure of T Tauri stars (TTSs) and its connection with the large-scale outflow is poorly known. Neither the effect of the magnetically mediated interaction between the star and the disc is well understood. The Mg ii multiplet is a fundamental tracer of TTSs atmospheres and outflows, and is the strongest feature in the near-ultra…
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…