Search Publications
Overview of semi-sinusoidal stellar variability with the CoRoT satellite
Baglin, A.; Catelan, M.; Janot-Pacheco, E. +13 more
Context. To date, the CoRoT space mission has produced more than 124 471 light curves. Classifying these curves in terms of unambiguous variability behavior is mandatory for obtaining an unbiased statistical view on their controlling root-causes.
Aims: The present study provides an overview of semi-sinusoidal light curves observed by the CoRo…
Multi-wavelength Hubble Space Telescope Photometry of Stellar Populations in NGC 288
Anderson, J.; Milone, A. P.; Marino, A. F. +5 more
We present new UV observations for NGC 288, taken with the WFC3 detector on board the Hubble Space Telescope, and combine them with existing optical data from the archive to explore the multiple-population phenomenon in this globular cluster (GC). The WFC3's UV filters have demonstrated an uncanny ability to distinguish multiple populations along …
The Abundance, Ortho/Para Ratio, and Deuteration of Water in the High-mass Star-forming Region NGC 6334 I
Ceccarelli, C.; Comito, C.; Schilke, P. +6 more
We present Herschel/HIFI observations of 30 transitions of water isotopologues toward the high-mass star-forming region NGC 6334 I. The line profiles of H16 2O, H17 2O, H18 2O, and HDO show a complex pattern of emission and absorption components associated with the embedded hot core…
Observations of Coronal Mass Ejections with the Coronal Multichannel Polarimeter
de Toma, G.; Tian, H.; Bethge, C. +3 more
The Coronal Multichannel Polarimeter (CoMP) measures not only the polarization of coronal emission, but also the full radiance profiles of coronal emission lines. For the first time, CoMP observations provide high-cadence image sequences of the coronal line intensity, Doppler shift, and line width simultaneously over a large field of view. By stud…
Stellar Populations of Lyman Break Galaxies at z ~= 1-3 in the HST/WFC3 Early Release Science Observations
Holtzman, J. A.; O'Connell, R. W.; Finkelstein, S. L. +24 more
We analyze the spectral energy distributions (SEDs) of Lyman break galaxies (LBGs) at z ~= 1-3 selected using the Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) UVIS channel filters. These HST/WFC3 observations cover about 50 arcmin2 in the GOODS-South field as a part of the WFC3 Early Release Science program. These LBGs at z ~…
The distance to NGC 1316 (Fornax A): yet another curious case
Della Valle, M.; Blakeslee, J. P.; Cantiello, M. +6 more
Aims: The distance of NGC 1316, the brightest galaxy in the Fornax cluster, provides an interesting test for the cosmological distance scale. First, because Fornax is the second largest cluster of galaxies within ≲25 Mpc after Virgo and, in contrast to Virgo, has a small line-of-sight depth; and second, because NGC 1316 is the single galaxy w…
Spatial distribution of water in the stratosphere of Jupiter from Herschel HIFI and PACS observations
Lara, L. M.; Hartogh, P.; Lellouch, E. +11 more
Context. In the past 15 years, several studies suggested that water in the stratosphere of Jupiter originated from the Shoemaker-Levy 9 (SL9) comet impacts in July 1994, but a direct proof was missing. Only a very sensitive instrument observing with high spectral/spatial resolution can help to solve this problem. This is the case of the Herschel S…
Measuring the thermal Sunyaev-Zel'dovich effect through the cross correlation of Planck and WMAP maps with ROSAT galaxy cluster catalogs
Battaglia, Nicholas; Bond, J. Richard; Spergel, David N. +3 more
We measure a significant correlation between the thermal Sunyaev-Zel'dovich effect in the Planck and WMAP maps and an X-ray cluster map based on ROSAT. We use the 100, 143 and 343 GHz Planck maps and the WMAP 94 GHz map to obtain this cluster cross spectrum. We check our measurements for contamination from dusty galaxies using the cross correlatio…
The asymmetric drift, the local standard of rest, and implications from RAVE data
Watson, F.; Munari, U.; Steinmetz, M. +13 more
Context. The determination of the local standard of rest (LSR), which corresponds to the measurement of the peculiar motion of the Sun based on the derivation of the asymmetric drift of stellar populations, is still a matter of debate. The classical value of the tangential peculiar motion of the Sun with respect to the LSR was challenged in recent…
BL Lacertae identifications in a ROSAT-selected sample of Fermi unidentified objects
Palazzi, E.; Sbarufatti, B.; Minniti, D. +15 more
The optical spectroscopic followup of 27 sources belonging to a sample of 30 high-energy objects selected by positionally cross correlating the first Fermi/LAT Catalog and the ROSAT All-Sky Survey Bright Source Catalog is presented here. It has been found or confirmed that 25 of them are BL Lacertae objects (BL Lacs), while the remaining two are G…