Ivan Maly
March 13th, 2014, 01:32 AM
Among the interesting galaxies that I observed on my last outing with my 12" SCT was the curious pair of NGC 4190 and the much larger NGC 4214. Below are my observing notes with some data added in square brackets. The images are SDSS-III (http://www.sdss.org/collaboration/credits.html). The observations were made at between 125 and 375x.
1117
NGC 4214 lower left, smal 4190 in upper right corner
1118
NGC 4190
NGC 4190 is very slightly elongated. Edges diffuse, no concentration. [In NED the NGC is a galaxy but identical with VV 104 and MCG+6-27-30, which have legacy classifications as galaxy pairs. VV 104a is the more massive southern “part of galaxy”, and 104b is the “star cluster” off its NNE edge. It was cataloged in a paper on super star clusters, and the galaxy is in the ROSAT X-ray sources catalog. The SDSS-III image shows the two parts embedded fully in a round halo, so the visual appearance is probably due to the two regions of star formation (VV 104a and b) that dominated the galaxy’s light but remained unresolved. Im pec, m13.4g, 1.52x1.17’, 22 Mly by redshift, 2.8-3.5 Mpc by Tully-Fisher and brightest stars.]
1119
NGC 4214
NGC 4214. Already at low magnification, within a larger halo a slightly curved string of at least three bright regions that are nearly touching each other is visible. At intermediate magnification, the bright region which is nearest to the brightest star in the field from the core is cleanly separated, comparatively bright, and has sharp edges. In the central core, a bright star is visible at this magnification. The bright region on the opposite side of the core is only slightly resolved from the core, and is fainter than the other bright region. [This galaxy is in Herschel 400. 25 Mly. 2.7-6.4 Mpc. 8.5x6.6’. m10.24. IAB(s)m. Star clusters and HII regions in this galaxy have been thoroughly mapped; the visually observable regions may correlate with the described super star clusters.]
1117
NGC 4214 lower left, smal 4190 in upper right corner
1118
NGC 4190
NGC 4190 is very slightly elongated. Edges diffuse, no concentration. [In NED the NGC is a galaxy but identical with VV 104 and MCG+6-27-30, which have legacy classifications as galaxy pairs. VV 104a is the more massive southern “part of galaxy”, and 104b is the “star cluster” off its NNE edge. It was cataloged in a paper on super star clusters, and the galaxy is in the ROSAT X-ray sources catalog. The SDSS-III image shows the two parts embedded fully in a round halo, so the visual appearance is probably due to the two regions of star formation (VV 104a and b) that dominated the galaxy’s light but remained unresolved. Im pec, m13.4g, 1.52x1.17’, 22 Mly by redshift, 2.8-3.5 Mpc by Tully-Fisher and brightest stars.]
1119
NGC 4214
NGC 4214. Already at low magnification, within a larger halo a slightly curved string of at least three bright regions that are nearly touching each other is visible. At intermediate magnification, the bright region which is nearest to the brightest star in the field from the core is cleanly separated, comparatively bright, and has sharp edges. In the central core, a bright star is visible at this magnification. The bright region on the opposite side of the core is only slightly resolved from the core, and is fainter than the other bright region. [This galaxy is in Herschel 400. 25 Mly. 2.7-6.4 Mpc. 8.5x6.6’. m10.24. IAB(s)m. Star clusters and HII regions in this galaxy have been thoroughly mapped; the visually observable regions may correlate with the described super star clusters.]