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VLT FORS2 optical imaging and spectroscopy of nine luminous type 2 AGN at 0.3 < z < 0.6 - I. Ionized gas nebulae
Humphrey, A.; Villar-Martín, M.; Arribas, S. +4 more
We present optical imaging and long slit spectroscopic observations of nine luminous type 2 active galactic nuclei (AGN) within the redshift range 0.3 < z < 0.6 based on Very Large Telescope Focal Reducer and Low Dispersion Spectrograph (VLT FORS2) data. Most objects (6/9) are high luminosity Seyfert 2, and three are type 2 quasars (QSO2), w…
Star-forming regions at the periphery of the supershell surrounding the Cyg OB1 association - I. The star cluster vdB 130 and its ambient gas and dust medium
Wiebe, D. S.; Moiseev, A. V.; Rastorguev, A. S. +6 more
Stellar population and the interstellar gas-dust medium in the vicinity of the open star cluster vdB 130 are analysed using optical observations taken with the 6 m telescope of the Special Astrophysical Observatory of Russian Academy of Sciences and the 125 cm telescope of the Sternberg Astronomical Institute, Lomonosov Moscow State University alo…
Probing the nature of the pre-merging system Hickson Compact Group 31 through integral field unit data★
Mendes de Oliveira, C.; de Mello, D. F.; Amram, P. +3 more
We present a study of the kinematics and the physical properties of the central region of the Hickson Compact Group 31 (HCG 31), focusing on the HCG 31A+C system, using integral field spectroscopy data taken with the Gemini South Telescope. The main players in the merging event (galaxies A and C) are two dwarf galaxies, which have had one close en…
Swift J201424.9+152930: discovery of a new deeply eclipsing binary with 491-s and 3.4-h modulations
D'Avanzo, P.; Campana, S.; D'Elia, V. +13 more
We report on the discovery of a new X-ray pulsator, Swift J201424.9+152930 (Sw J2014). Owing to its X-ray modulation at 491 s, it was discovered in a systematic search for coherent signals in the archival data of the Swift X-ray Telescope. To investigate the nature of Sw J2014, we performed multiwavelength follow-up observations with space-borne (…
Early science with the Large Millimeter Telescope: dust constraints in a z ∼ 9.6 galaxy
Yun, M. S.; Pope, A.; Dunlop, J. S. +8 more
Recent observations with the GISMO (Goddard-IRAM Superconducting 2 Millimeter Observer) 2 mm camera revealed a detection 8 arcsec away from the lensed galaxy MACS1149-JD1 at z = 9.6. Within the 17.5 arcsec FWHM GISMO beam, this detection is consistent with the position of the high-redshift galaxy and therefore, if confirmed, this object could be c…
What can Gaia (with Thirty Meter Telescope) say about the Sculptor Dwarf's Core?
Evslin, Jarah
Walker et al.'s Magellan/Michigan/MIKE Fiber System (MMFS) survey identified 1355 red giant candidates in the dwarf spheroidal galaxy Sculptor. We find that the Gaia satellite will be able to measure the proper motions of 139 of these with a precision of between 13 and 20 km s-1. Using a Jeans analysis and 5-parameter density model we s…
Mid-infrared variations of R Coronae Borealis stars
Rao, N. Kameswara; Lambert, David L.
Mid-infrared (IR) photometry of R Coronae Borealis stars obtained from various satellites from Infrared Astronomical Satellite (IRAS) to Wide-field Infrared Survey Explorer (WISE) has been utilized in studying the variations of the circumstellar dust's contributions to the spectral energy distribution of these stars. The variation of the fractiona…
Tracking Cluster Debris (TraCD) - I. Dissolution of clusters and searching for the solar cradle
Gibson, Brad K.; Flynn, Chris; Hurley, Jarrod R. +1 more
The capability to reconstruct dissolved stellar systems in dynamical and chemical space is a key factor in improving our understanding of the evolution of the Milky Way. Here we concentrate on the dynamical aspect and given that a significant portion of the stars in the Milky Way have been born in stellar associations or clusters that have lived a…
Tracing the general structure of Galactic molecular clouds using Planck data - I. The Perseus region as a test case
Klessen, Ralf S.; Kauffmann, Jens; Veltchev, Todor V. +4 more
We present an analysis of probability distribution functions (pdfs) of column density in different zones of the star-forming region Perseus and its diffuse environment based on the map of dust opacity at 353 GHz available from the Planck archive. The pdf shape can be fitted by a combination of a lognormal function and an extended power-law tail at…
INTEGRAL discovery of unusually long broad-band X-ray activity from the Supergiant Fast X-ray Transient IGR J18483-0311
Sidoli, L.; Bird, A. J.; Bazzano, A. +1 more
We report on a broad-band X-ray study (0.5-250 keV) of the Supergiant Fast X-ray Transient IGR J18483-0311 using archival INTEGRAL data and a new targeted XMM-Newton observation. Our INTEGRAL investigation discovered for the first time an unusually long X-ray activity (3-60 keV) which continuously lasted for at least ∼11 d, i.e. a significant frac…