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H2O in stellar atmospheres
Jørgensen, U. G.; Aringer, B.; Jensen, P. +1 more
We have performed a detailed ab initio computation of the dipole moment surface, the vibrational transition moments, and the spectral lines for the water molecule. A total of 412 vibrational eigenstates were identified below 30 000 cm-1, corresponding to ~85 000 vibrational transitions. In principle there are many billions of allowed vi…
An atlas of mid-infrared dust emission in spiral galaxies
Roussel, H.; Sauvage, M.; Madden, S. +7 more
We present maps of dust emission at 7 mu m and 15 mu m/7 mu m intensity ratios of selected regions in 43 spiral galaxies observed with ISOCAM. This atlas is a complement to studies based on these observations, dealing with star formation in centers of barred galaxies and in spiral disks. It is accompanied by a detailed description of data reductio…
Direct multi-wavelength limb-darkening measurements of three late-type giants with the Navy Prototype Optical Interferometer
Hajian, A. R.; Wittkowski, M.; Hummel, C. A. +3 more
We present direct measurements of the limb-darkened intensity profiles of the late-type giant stars HR 5299, HR 7635, and HR 8621 obtained with the Navy Prototype Optical Interferometer (NPOI) at the Lowell Observatory. A triangle of baselines with lengths of 18.9 m, 22.2 m, and 37.5 m was used. We utilized squared visibility amplitudes beyond the…
Cluster AgeS Experiment. CCD photometry of SX Phoenicis variables in the globular cluster M 55
Thompson, I. B.; Schwarzenberg-Czerny, A.; Kaluzny, J. +2 more
We present CCD photometry of SX Phe variables in the field of the globular cluster M 55. We have discovered 27 variables, three of which are probable members of the Sagittarius dwarf galaxy. All of the SX Phe stars in M 55 lie in the blue straggler region of the cluster color-magnitude diagram. Using period ratio information we have identified the…
The host galaxy and optical light curve of the gamma-ray burst GRB 980703
Tanvir, N.; Pedersen, H.; Fynbo, J. P. U. +10 more
We present deep HST/STIS and ground-based photometry of the host galaxy of the gamma-ray burst
Star clusters in M 33. IV. A new survey from deep HST images
Ford, H. C.; Bianchi, L.; Chandar, R.
We have detected 102 star clusters in M 33, from 35 deep Hubble Space Telescope (HST) WFPC2 fields taken from our program and from the HST archive. Twenty-eight fields have V and I band imaging, and an additional seven fields are imaged in a single V filter. Eighty-two of the clusters were previously unknown. Integrated photometry reveals that 25 …
The Hipparcos observations and the mass of sub-stellar objects
Pourbaix, D.
The Hipparcos Intermediate Astrometric Data have been used lately to estimate the inclination of the orbital plane of candidate extrasolar planets. Whereas most of these investigations derive almost face-on orbits, we show that the astrometric data are seldom precise enough to undertake such studies and that the ``face-on'' result might be just a …
Optical photometry of the PSR B0656+14 and its neighborhood
Zharikov, S. V.; Shibanov, Yu. A.; Kurt, V. G. +3 more
We present the results of broad-band photometry of the nearby middle-aged radio pulsar PSR B0656+14 and its neighborhood obtained with the 6-meter telescope of the SAO RAS and with the Hubble Space Telescope. The broad-band spectral flux F_nu of the pulsar decreases with increasing frequency in the near-IR range and increases with frequency in the…
Multiple shocks around the low-luminosity protostar IRAS 16293-2422
Ceccarelli, C.; Caux, E.; Lefloch, B. +2 more
Using the IRAM 30 m and SEST 15 m telescopes we mapped an area covering 300''x220'' around IRAS 16293-2422 in the N2H+ J=1-->0, H2CO J = 31,3-->21,2, SiO J=2-->1 J=3-->2, and J=5-->4 molecular transitions. Five positions were also observed in the FIR, between 45 µm and 200…
Active region transient brightenings. A simultaneous view by SXT, EIT and TRACE
Berghmans, D.; Clette, F.; McKenzie, D.
This paper reports on a qualitative study on the weakest flarelike brightenings in active region that can be observed with current coronal imagers. Specificallly, we investigate the correspondence of the ``active region transient brightenings'' (ARTB) first observed almost a decade ago with SXT with similar brightenings in the EUV that are now obs…