5 research outputs found
An Unexpected Discovery in the Rich Open Cluster NGC 6819 Using XMM-Newton
We present the first study of the X-ray population of the intermediate-age
rich open cluster NGC 6819 using the XMM-Newton Observatory. In the past
decade, Chandra X-ray observations have shown a relationship between the X-ray
population of globular clusters and their internal dynamics and encounter
frequency. We investigate the role dynamics possibly play in the formation of
X-ray sources in NGC 6819, and compare our results with known properties of
field and globular cluster X-ray populations. We implement a multi wavelength
approach to studying the X-ray sources, utilizing X-ray and UV data from XMM
observations along with the wealth of photometry and radial-velocity data from
the WIYN Open Cluster Study (WOCS) and the CFHT Open Cluster Survey. Within the
cluster half-light radius we detect 12 X-ray sources down to a luminosity of
10^30 erg/s for cluster members. The sources include a candidate quiescent
low-mass X-ray binary (qLMXB), a candidate cataclysmic variable, and two active
binary systems. The presence of a qLMXB in an open cluster is previously
unexpected given the known relationships between luminous X-ray sources and
encounter frequency in globular clusters, and most likely has a dynamical
origin.Comment: 14 pages, 11 figures, accepted for publication in the Astrophysical
Journa
Mindfulness Broadens Awareness and Builds Eudaimonic Meaning: A Process Model of Mindful Positive Emotion Regulation
Contemporary scholarship on mindfulness casts it as a form of purely non-evaluative engagement with experience. Yet, traditionally mindfulness was not intended to operate in a vacuum of dispassionate observation, but was seen as facilitative of eudaimonic mental states. In spite of this historical context, modern psychological research has neglected to ask the question of how the practice of mindfulness affects downstream emotion regulatory processes to impact the sense of meaning in life. To fill this lacuna, here we describe the Mindfulness-to-Meaning Theory, from which we derive a novel process model of mindful positive emotion regulation informed by affective science, in which mindfulness is proposed to introduce flexibility in the generation of cognitive appraisals by enhancing interoceptive attention, thereby expanding the scope of cognition to facilitate reappraisal of adversity and savoring of positive experience. This process is proposed to culminate in a deepened capacity for meaning-making and greater engagement with life