Search Publications
Constraining the structure of the transition disk HD 135344B (SAO 206462) by simultaneous modeling of multiwavelength gas and dust observations
Pinte, C.; Ménard, F.; Duchêne, G. +14 more
Context. Constraining the gas and dust disk structure of transition disks, particularly in the inner dust cavity, is a crucial step toward understanding the link between them and planet formation. HD 135344B is an accreting (pre-)transition disk that displays the CO 4.7 µm emission extending tens of AU inside its 30 AU dust cavity.
Aims…
Planck 2013 results. III. LFI systematic uncertainties
Bernard, J. -P.; Planck Collaboration; Aghanim, N. +218 more
We present the current estimate of instrumental and systematic effect uncertainties for the Planck-Low Frequency Instrument relevant to the first release of the Planck cosmological results. We give an overview of the main effects and of the tools and methods applied to assess residuals in maps and power spectra. We also present an overall budget o…
A resolved analysis of cold dust and gas in the nearby edge-on spiral NGC 891
Clements, D. L.; Boquien, M.; Bianchi, S. +18 more
We investigate the connection between dust and gas in the nearby edge-on spiral galaxy NGC 891, a target of the Very Nearby Galaxies Survey. High resolution Herschel PACS and SPIRE 70, 100, 160, 250, 350, and 500 µm images are combined with JCMT SCUBA 850 µm observations to trace the far-infrared/submillimetre spectral energy distribut…
Joint Planck and WMAP CMB map reconstruction
Starck, J. -L.; Sureau, F.; Bobin, J. +2 more
We present a novel estimate of the cosmological microwave background (CMB) map by combining the two latest full-sky microwave surveys: WMAP nine-year and Planck PR1. The joint processing benefits from a recently introduced component separation method coined"local-generalized morphological component analysis" (LGMCA) and based on the sparse distrib…
High-resolution abundance analysis of red giants in the globular cluster NGC 6522
Minniti, D.; Chiappini, C.; Zoccali, M. +11 more
Context. The [Sr/Ba] and [Y/Ba] scatter observed in some galactic halo stars that are very metal-poor and in a few individual stars of the oldest known Milky Way globular cluster NGC 6522 have been interpreted as evidence of early enrichment by massive fast-rotating stars (spinstars). Because NGC 6522 is a bulge globular cluster, the suggestion wa…
The molecular complex associated with the Galactic H II region Sh2-90: a possible site of triggered star formation
Zavagno, A.; Samal, M. R.; Ojha, D. K. +6 more
Aims: We investigate the star formation activity in the molecular complex associated with the Galactic H ii region Sh2-90.
Methods: We obtain the distribution of the ionized and cold neutral gas using radio-continuum and Herschel observations. We use near-infrared and Spitzer data to investigate the stellar content of the complex. We dis…
The 100-month Swift catalogue of supergiant fast X-ray transients. I. BAT on-board and transient monitor flares
Gehrels, N.; Esposito, P.; Ducci, L. +10 more
Context. Supergiant fast X-ray transients (SFXTs) are high mass X-ray binaries (HMXBs) that are defined by their hard X-ray flaring behaviour. During these flares they reach peak luminosities of 1036-1037 erg s-1 for a few hours (in the hard X-ray), which are much shorter timescales than those characterizing Be/X-r…
Optical - near-infrared catalog for the AKARI north ecliptic pole Deep field
Goto, Tomotsugu; Ohyama, Youichi; Pearson, Chris +9 more
Aims: We present an 8-band (u∗, g', r', i', z', Y, J, Ks) optical to near-infrared deep photometric catalog based on the observations made with MegaCam and WIRCam at the CFHT, and compute photometric redshifts, zp in the north ecliptic pole (NEP) region. AKARI infrared satellite carried out a deep survey in th…
Small-scale chromospheric jets above a sunspot light bridge
Ichimoto, Kiyoshi; Louis, Rohan E.; Beck, Christian
Context. The chromosphere above sunspot umbrae and penumbrae shows several different types of fast dynamic events such as running penumbral waves, umbral flashes, and penumbral microjets.
Aims: The aim of this paper is to identify the physical driver responsible for the dynamic and small-scale chromospheric jets above a sunspot light bridge. …
XMM-Newton observations reveal the disappearance of the wind in 4U 1630-47
Díaz Trigo, M.; Guainazzi, M.; Miller-Jones, J. C. A. +1 more
We report on XMM-Newton observations of the black hole X-ray binary 4U 1630-47 during its 2012-2013 outburst. The first five observations monitor the source as its luminosity increases across the high-soft state of accretion. In the sixth observation the source has made a transition to an "anomalous" state, characterised by a significant contribut…