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SMC X-3
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ATel 9677: SMC X-3 - an exceptionally bright extended outburst
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NGC 6357
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NGC 6357 (also War and Peace Nebula, Lobster Nebula, Sharpless 11, RCW 131, Gum 66 and ESO 392-SC10) is a magnitude +8.2 emission nebula located 8000 light-years away in the constellation Scorpius. The nebula includes the open cluster Pismis 24, which is home to some of the most massive stars known....
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Collinder 261
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Title: A Chandra X-ray census of the interacting binaries in old open clusters - Collinder 261 Author: Smriti Vats, Maureen van den Berg We present the first X-ray study of Collinder 261 (Cr261), which at an age of 7 Gyr is one of the oldest open clusters known in the Galaxy. Our observation with the Cha...
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LMXBs
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The European Space Agency’s XMM-Newton has seen vast clouds of superheated gas, whirling around miniature stars and escaping from being devoured by the stars’ enormous gravitational fields - giving a new insight into the eating habits of the galaxy’s ‘cannibal’ stars.
The clouds of gas rang...
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NGC 6334
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Title: Wide-Field Infrared Imaging Polarimetry of the NGC 6334 Region: A Nest of Infrared Reflection Nebulae Authors: J. Hashimoto, M. Tamura, R. Kandori, N. Kusakabe, Y. Nakajima, M. Kurita, T. Nagata, T. Nagayama, J. Hough, A. Chrysostomou We report the detection of eighteen infrared reflect...
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NGC 2420
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Title: GALEX Ultraviolet photometry of NGC 2420: searching for WDs Authors: C. De Martino, L. Bianchi, I. Pagano, J. Herald, D. Thilker We present colour-magnitude diagrams of the open cluster NGC 2420, obtained from Galaxy Evolution Explorer (GALEX) ultraviolet images in FUV and NUV bands and S...
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NGC 2392
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We recently looked at Castor, the second brightest star in Gemini and a fine multiple star. Not far away, you'll find the remnants of a dying star, the beautiful planetary nebula NGC 2392. This is one of the youngest-known planetary nebula - only 1,000 years old - and it's easily visible in a small te...
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NGC 2174
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NGC 2174 (also known as Monkey Head Nebula and CED 67A) is a magnitude +6.8 H II emission nebula associated with the open star cluster NGC 2175 located 6,400 light-years away in the constellation Orion, near the border of Gemini. The nebula covers an area of sky larger than the full Moon. Narrow-band...
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51 Pegasi
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Title: 51 Pegasi - a planet-bearing Maunder minimum candidate Authors: K. Poppenhaeger, J. Robrade, J.H.M.M. Schmitt, J.C. Hall We observed 51 Peg, the first detected planet-bearing star, in a 55 ks XMM-Newton pointing and in 5 ks pointings each with Chandra HRC-I and ACIS-S. The star has a very lo...
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HD142527
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A close look at the protoplanetary disk around a young star by two teams of astronomers using the Subaru telescope on Mauna Kea has led to the unexpected discovery of two banana-shaped arcs facing each other. The disk, which surrounds the star HD142527, also shows a gap that could be the tumul...
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Planetary nebulae
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The colourful, intricate shapes in these NASA Hubble Space Telescope images reveal how the glowing gas ejected by dying Sun-like stars evolves dramatically over time. These gaseous clouds, called planetary nebulae, are created when stars in the last stages of life cast off their outer layers of m...
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NGC 1662
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NGC 1662 (also Lund 141, Cr 55, OCL 470) is a magnitude +7.0 open cluster located 1425 light years away in the constellation Orion. It is located within the Orion Arm in the northern part of Orion's Shield, just to the northwest of the star Pi1 Orionis, and is easily visible with 10x50 binoculars as a sma...
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NGC 2239
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NGC 2239 (also NGC 2244, Cr 99, Mel 47 and OCL 515) is a magnitude +4.8 open cluster associated with the Rosette Nebula located 5,500 light-years away in the constellation Monoceros. NGC 2239 contains 5 - 8th magnitude young blue stars, which arose about four million years ago. The magnitude 6.0 yell...
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W UMa systems
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Title: The dynamical stability of W Ursae Majoris-type systems Authors: Lifang Li, Fenghui Zhang Theoretical study indicates that a contact binary system would merge into a rapidly rotating single star due to tidal instability when the spin angular momentum of the system is more than a third of it...
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NGC 2024
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The Flame Nebula, designated as NGC 2024 (and Sh2-277) is an emission nebula in the Constellation Orion. It is about 900 to 1,500 light-years away.
Read more
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