We report the discovery of a galactic wind in the central region of the galaxy M100. This result is based on a careful 2D spectroscopic study performed on observations made with the fibre system INTEGRAL on the William Herschel Telescope. The primary evidence of the wind is the presence of blueshifted interstellar NaD absorption lines. The velocity
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Discovery of a galactic wind in the central region of M100Jiménez-Vicente, J. et al.112007
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Discovery of a Low-Mass Brown Dwarf Companion of the Young Nearby Star G 196-3
A substellar-mass object in orbit at about 300 astronomical units (AU) from the young low-mass star G196-3 was detected by direct imaging. Optical and infrared photometry and low- and intermediate-resolution spectroscopy of the faint companion, hereafter referred to as G196-3B, confirms its cool atmosphere and allows its mass to be estimated at 25^
Rebolo, Rafael et al.Advertised on:
111998 -
Discovery of the first white dwarf + T dwarf binary system and the use of white dwarfs as age calibrators
We present the discovery of the first white dwarf + T dwarf binary system. Systems containing a white dwarf and a brown dwarf are rare but can be used to place constraints on the age of the binary, making them valuable benchmark systems. It is currently not possible to calculate brown dwarf ages from models alone and white dwarfs provide an
Day-Jones, A. C. et al.Advertised on:
112010 -
Discovery of the spectroscopic binary nature of the Cepheids X Puppis and XX Sagittarii
We present the analysis of photometric and spectroscopic data of two bright Galactic Cepheids, X Puppis and XX Sagittarii. Based on the available data in the literature as well as our own observations spanning 75 years, we conclude that both Cepheids belong to spectroscopic binary systems. However, the data are not sufficient to determine the
Szabados, László et al.Advertised on:
112012 -
Distances to Planetary Nebulae: A Key to Galactic Structure and Evolution
The knowledge of accurate distances to Planetary Nebulae (PNe) is necesary in order to improve the determination of some physical quantities such as the nebular radius and mass. The nebular mass is a critical parameter to determine the amount of mass that is returned to the interstellar medium by the PN. This mass return can influence the evolution
Corradi, R. et al.Advertised on:
111998 -
Do Large Scale Jets Arise Only in Long Period Black Hole X-ray Novae?
In this brief note we remark that the four spatially resolved relativistic radio jets among the 14 dynamically confirmed black hole x-ray novae are all in systems with long orbital periods. Many shorter period systems show transient radio outbursts which are attributed to jets, but these jets have not been resolved. Super-Eddington accretion has
Garcia, M. R. et al.Advertised on:
112002