Search Publications
Multifrequency filter search for high redshift sources and lensing systems in Herschel-ATLAS
Bonavera, L.; Diego, J. M.; González-Nuevo, J. +2 more
We present a new catalog of high-redshift candidate Herschel sources. Our sample is obtained after applying a multifrequency filtering method ("matched multifilter"), which is designed to improve the signal-to-noise ratio of faint extragalactic point sources. The method is tested against already-detected sources from the Herschel Astrophysical Ter…
Star formation and gas in the minor merger UGC 10214
Boquien, M.; Xu, C. K.; Verley, S. +6 more
Minor mergers play a crucial role in galaxy evolution. UGC 10214 (the Tadpole galaxy) is a prime example of this process in which a dwarf galaxy has interacted with a large spiral galaxy ∼250 Myr ago and produced a perturbed disc and a giant tidal tail. We used a multi-wavelength dataset that partly consists of new observations (Hα, HI, and CO) an…
Spectrophotometric variegation of the layering in comet 67P/Churyumov-Gerasimenko as seen by OSIRIS
Lamy, P. L.; Lara, L. M.; Bertaux, J. -L. +40 more
Context. Between August 2014 and September 2016, the ESA space mission Rosetta escorted comet 67P/Churyumov-Gerasimenko (67P) during its perihelion passage. The onboard OSIRIS Narrow Angle Camera (NAC) acquired high-resolution multispectral images of the cometary surface. These datasets allowed a characterization of the spectrophotometric variegat…
Investigation of the stellar content in the IRAS 05168+3634 star-forming region
Azatyan, N. M.
Aims: We report the investigation results of the structure and content of a molecular cloud surrounding the source IRAS 05168+3634 (also known as Mol 9).
Methods: We present a photometric analysis using the data of J, H, K UKIDSS, [3.6], [4.5] µm Spitzer-IRAC and 3.4, 4.6, 12, 22 µm WISE databases. A multi-color criteria was …
Comparison of proper motions in declination for 387 Gaia DR2 and HIPPARCOS stars from ILS observations over many decades
Taris, F.; Damljanović, G.
Context. The second solution of the Gaia catalog, which has been available since April 2018, plays an important role in the realization of the future Gaia reference frame. Since 1997, the reference frame has been materialized by the optical HIPPARCOS positions of about 120 000 stars. The HIPPARCOS has been compared with and linked to the Internati…
Near- to mid-infrared spectroscopy of the heavily obscured AGN LEDA 1712304 with AKARI/IRC
Oyabu, S.; Toba, Y.; Kaneda, H. +5 more
Context. Although heavily obscured active galactic nuclei (AGNs) have been found by many observational studies, the properties of the surrounding dust are poorly understood. Using AKARI/IRC spectroscopy, we discovered a new heavily obscured AGN in LEDA 1712304 which shows a deep spectral absorption feature due to silicate dust.
Aims: We study…
An XMM-Newton look at the strongly variable radio-weak BL Lac Fermi J1544-0639
Pian, E.; Masetti, N.; Ubertini, P. +6 more
Context. Fermi J1544-0639/ASASSN-17gs/AT2017egv was identified as a gamma-ray/optical transient on May 15, 2017. Subsequent multiwavelength observations suggest that this source may belong to the new class of radio-weak BL Lacs.
Aims: We studied the X-ray spectral properties and short-term variability of Fermi J1544-0639 to constrain the X-ra…
Detection of an excessively strong 3-µm absorption near the lunar highland crater Dufay
Wöhler, C.; Grumpe, A.; Bhatt, M. +3 more
Using the near-infrared spectral reflectance data of the Chandrayaan-1 Moon Mineralogy Mapper (M3) instrument, we report an unusually bright structure of 30 × 60 km2 on the lunar equatorial farside near crater Dufay. At this location, the 3-µm absorption band feature, which is commonly ascribed to hydroxyl (OH) and/or w…
Characterization of the Agilkia region through discrete-element simulation of Philae's rebound
Grieger, Björn; Küppers, Michael; Wu, Xiaoyu +1 more
Context. The cold gas system and anchoring harpoons that were designed to hold Philae down after it landed on the Agilkia region of comet 67P/Churyumov-Gerasimenko (67P) failed. This caused the lander to move on a complex trajectory that comprised multiple impacts and rebounds. The motion of Philae was mainly dominated by the gravitational environ…
The stellar host in star-forming low-mass galaxies: Evidence for two classes
Muñoz-Tuñón, C.; Méndez-Abreu, J.; Lumbreras-Calle, A.
Context. The morphological evolution of star-forming galaxies provides important clues to understand their physical properties, as well as the triggering and quenching mechanisms of star formation.
Aims: We analyze the morphology of galaxies hosting star-forming events at low redshift (z < 0.36). We aim at connecting morphology and star-fo…