Archive for May, 2017

The (paper-)story of Hen 3-298

Posted May 7, 2017 By grigoris

Similarly to the post for GG Car, I though that it is better to keep a track of all papers I find for my sample. As far as Hen 3-298 (Simbad) the results are not that many!

  • 1966 / Wray, J. D. 1966(PhD thesis, Northwestern University)
    First detection as an Hα emission star.
  • 1976 / Henize, K. G. 1976 (ApJS, 30, 491)
    Also included in this catalog for Hα emission stars in the Southern Skies.
  • 1986 / Olnon, F. M.; Raimond, E.; Neugebauer, G.; van Duinen, R. J.; Habing, H. J.; Aumann, H. H.; Beintema, D. A.; Boggess, N.; Borgman, J.; Clegg, P. E.; Gillett, F. C.; Hauser, M. G.; Houck, J. R.; Jennings, R. E.; de Jong, T.; Low, F. J.; Marsden, P. L.; Pottasch, S. R.; Soifer, B. T.; Walker, R. G.; Emerson, J. P.; Rowan-Robinson, M.; Wesselius, P. R.; Baud, B.; Beichman, C. A.; Gautier, T. N.; Harris, S.; Miley, G. K.; Young, E. 1986 (A&A, 65, 607)
    Detected as an IR excess source.
  • 1994 / The, P. S.; de Winter, D.; Perez, M. R. 1994 (A&AS, 104, 315)
    Included in this catalog as an emission line star.
  • 2005 / Miroshnichenko, A. S.; Bjorkman, K. S.; Grosso, M.; Hinkle, K.; Levato, H.; Marang, F. 2005 (A&A, 436, 653)
    The first dedicated study of Hen 3-298. They identified double-peaked emission lines, such as Hα with a stronger red peak, and the [CaII] doublet. [OI] lines were found single-peaked. They also detected CO features in emission and estimated the temperature ~2000 K, suggesting that originates from a dust free zone, inside but close to the dusty disk. Moreover, they estimate log L/L∼ 5.1 and a spectral type of no earlier than B3, at a distance of 3-4.5 kpc. Suggesting a supergiant nature.
  • 2013 / Oksala, M. E.; Kraus, M.; Cidale, L. S.; Muratore, M. F.; Borges Fernandes, M. 2013 (A&A, 558A, 170)
    Part of the IR survey. Detecting and studying the CO features (also estimating ~2000 K), and estimating the ratio 12CO/13CO=20±5 (consistent with supergiants; Kraus 2009).

“Vegan” by PEBLO

Posted May 7, 2017 By grigoris



Finally … the Magellanic Clouds by eye!

Posted May 5, 2017 By grigoris

During the last weekend I went hiking – albeit with a company of many astronomers! – a bit outside Santiago (we actually camp at Banos Colina in Cajon del Maipo). The mountain views were impressive, but during night I got another stunning view. As we were relaxing in the thermal pools we were starring the sky as the night came. And suddenly we spotted the Magellanic Clouds! Finally after so many years working with the Clouds I had the opportunity to gaze them visually. Simply amazing …

The following picture was taken mostly to verify their existence (and as … a memory!).

The Magellanic Clouds (Banos )

The Magellanic Clouds (Banos Colina, Cajon del Maipo, Santiago, Chile).