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pro vyhledávání: '"Álvarez, Carlos A. Vargas"'
Autor:
Kiminki, Daniel C., Kobulnicky, Henry A., Álvarez, Carlos A. Vargas, Alexander, Michael J., Lundquist, Michael J.
The Cygnus OB2 Association is one of the nearest and largest collections of massive stars in the Galaxy. Situated at the heart of the "Cygnus X" complex of star-forming regions and molecular clouds, its distance has proven elusive owing to the ambigu
Externí odkaz:
http://arxiv.org/abs/1508.03108
Autor:
Kobulnicky, Henry A., Kiminki, Daniel C., Lundquist, Michael J., Burke, Jamison, Chapman, James, Keller, Erica, Lester, Kathryn, Rolen, Emily K., Topel, Eric, Bhattacharjee, Anirban, Smullen, Rachel A., Alvarez, Carlos A. Vargas, Runnoe, Jessie C., Dale, Daniel A., Brotherton, Michael M.
We analyze orbital solutions for 48 massive multiple-star systems in the Cygnus OB2 Association, 23 of which are newly presented here, to find that the observed distribution of orbital periods is approximately uniform in log P for P<45 d, but it is n
Externí odkaz:
http://arxiv.org/abs/1406.6655
Autor:
Alvarez, Carlos A. Vargas, Kobulnicky, Henry A., Bradley, David R., Kannappan, Sheila J., Norris, Mark A., Cool, Richard J., Miller, Brendan P.
We present a spectroscopic and photometric determination of the distance to the young Galactic open cluster Westerlund 2 using WFPC2 imaging from the Hubble Space Telescope and ground-based optical spectroscopy. HST imaging in the F336W, F439W, F555W
Externí odkaz:
http://arxiv.org/abs/1302.0863
Publikováno v:
Astronomical Journal; Aug2007, Vol. 134 Issue 2, p825-834, 10p