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The potential of using KMOS for multi-object massive star spectroscopy

  • Michael Wegner (a1), Ralf Bender (a1) (a2), Ray Sharples (a3) and the KMOS Team (a1) (a3) (a2) (a4) (a5) (a6)


KMOS, the “K-Band Multi-Object Spectrometer”, was built by a British-German consortium as a second generation instrument for the ESO Paranal Observatory. It is available to the user community since its successful commissioning in 2013 (Sharples et al. 2013). As a multi-object integral field spectrometer for the near infrared, KMOS offers 24 deployable IFUs of 2.8x2.8 arcsec and 14x14 spatial pixels each, which can either be placed individually within a 7.2 arcmin field of view or combined in a Mosaic mode in order to map contiguous fields on sky. The instrument covers the whole range of NIR atmospheric windows (0.8. . .2.5μm) with 5 spectral bands and a resolution of R ≈ 3000. . .4000.

Although the main science driver for KMOS was to enable the study of galaxy formation and evolution through multiplexed observations of high-redshift galaxies, KMOS also already exhibited its tremendous potential for the spectroscopy of massive stars: A quantitative study of 27 RSGs in NGC 300 (Gazak et al. 2015) proves its applicability for the spectroscopy of individual stars even beyond the Local Group. A Mosaic observation of the Galactic centre (Feldmeier-Krause et al. 2015) demonstrates how spectra of early-type stars can be extracted from a contiguous field. Other applications include (but need not be limited to) velocity determinations of globular cluster stars, observations of jets/outflows of high mass protostars, or contiguous mapping of star-forming regions.

We therefore aim at presenting the excellent capabilities of KMOS to a wider community and indicate potential applications.



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Sharples, R., Bender, R., Agudo Berbel, A., Bezawada, N., Castillo, R., Cirasuolo, M., Davidson, G., Davies, R., Dubbeldam, M., Fairley, A., Finger, G., Förster Schreiber, N., Gonte, F., Hess, H.-J., Jung, I., Lewis, I., Lizon, J.-L., Muschielok, B., Pasquini, L., Pirard, J., Popovic, D., Ramsay, S., Rees, P., Richter, J., Riquelme, M., Rodrigues, M., Saviane, I., Schlichter, J., Schmidtobreick, L., Segovia, A., Smette, A., Szeifert, T., van Kesteren, A., Wegner, M., & Wiezorrek, E., 2013, The Messenger, 151, 21
Gazak, J. Z., Kudritzki, R., Evans, C., Patrick, L., Davies, B., Bergemann, M., Plez, B., Bresolin, F., Bender, R., Wegner, M., Bonanos, A. Z., & Williams, S. J., 2015, ApJ, 805, 182
Feldmeier-Krause, A., Neumayer, N., Schödel, R., Seth, A., Hilker, M., de Zeeuw, P. T., Kuntschner, H., Walcher, C. J., Lützgendorf, N., & Kissler-Patig, M., 2015, A&A, 584, A2
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Proceedings of the International Astronomical Union
  • ISSN: 1743-9213
  • EISSN: 1743-9221
  • URL: /core/journals/proceedings-of-the-international-astronomical-union
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