Swift-LSST Synergies

Invited talk at the "Time Domain Astrophysics with Swift III" meeting in Clemson SC, Oct 2-3 2018

Social exclusion of Australian childless women in their reproductive years

Research suggests Australian childless women are at risk of pronatalism-driven social exclusion. This exploratory, mixed methods, cross-sectional study described and explored the social exclusion of Australian childless women aged 25 to 44 years, and asked: what are the nature and extent of social exclusion of childless women; and do the nature and extent of exclusion vary for different types of childless women? A total of 776 childless female Australian residents aged 25 to 44 years completed a self-administered questionnaire. Quantitative data were collected on childlessness types, indicators of exclusion and perceived stigmatisation and exclusion due to being childless. Data were analysed using descriptive statistics, One Way ANOVAs and Kruskal Wallis Analysis of Ranks. Qualitative data on childless women’s experiences were inductively thematically analysed. Findings suggest societal-level pronatalism drives exclusion of Australian childless women. While exclusion occurs in all domains of life, childless women experience more exclusion, and perceive more exclusion due to being childless, in the social and civic domains than the service and economic domains. Circumstantially and involuntarily childless women, followed by voluntarily childless women, perceive more exclusion due to being childless than undecided and future childed women. Experiences are influenced by the nature of women’s ‘deviance’ from pronatalism

PTF11kx: A Type Ia Supernova with Hydrogen Emission Persisting After 3.5 Years

The optical transient PTF11kx exhibited both the characteristic spectral features of Type Ia supernovae (SNe Ia) and the signature of ejecta interacting with circumstellar material (CSM) containing hydrogen, indicating the presence of a nondegenerate companion. We present an optical spectrum at $1342$ days after peak from Keck Observatory, in which the broad component of H$\alpha$ emission persists with a similar profile as in early-time observations. We also present $Spitzer$ IRAC detections obtained $1237$ and $1818$ days after peak, and an upper limit from $HST$ ultraviolet imaging at $2133$ days. We interpret our late-time observations in context with published results - and reinterpret the early-time observations - in order to constrain the CSM's physical parameters and compare to theoretical predictions for recurrent nova systems. We find that the CSM's radial extent may be several times the distance between the star and the CSM's inner edge, and that the CSM column density may be two orders of magnitude lower than previous estimates. We show that the H$\alpha$ luminosity decline is similar to other SNe with CSM interaction, and demonstrate how our infrared photometry is evidence for newly formed, collisionally heated dust. We create a model for PTF11kx's late-time CSM interaction and find that X-ray reprocessing by photoionization and recombination cannot reproduce the observed H$\alpha$ luminosity, suggesting that the X-rays are thermalized and that H$\alpha$ radiates from collisional excitation. Finally, we discuss the implications of our results regarding the progenitor scenario and the geometric properties of the CSM for the PTF11kx system.Comment: 15 pages, 8 figures, 3 tables; submitted to Ap

An examination of the health and wellbeing of childless women: A cross-sectional exploratory study in Victoria, Australia

BackgroundChildlessness among Australian women is increasing. Despite this, little is known about the physical and mental health and wellbeing of childless women, particularly during the reproductive years. The aims of this exploratory study were to: 1) describe the physical and mental health and wellbeing and lifestyle behaviours of childless women who are currently within the latter part of their reproductive years (30 &ndash; 45 years of age); and 2) compare the physical and mental health and wellbeing and lifestyle behaviours of these childless women to Australian population norms.MethodsA convenience sample of 50 women aged between 30 and 45 years were recruited to participate in a computer assisted telephone interview. The SF-36 Health Survey v2 and lifestyle indicators were collected in regards to women&rsquo;s health and wellbeing. Data were analysed using descriptive statistics, t-tests for independent sample means and 95% confidence intervals for the difference between two independent proportions.ResultsChildless women in this study reported statistically significant poorer general health, vitality, social functioning and mental health when compared to the adult female population of Australia. With the exception of vegetable consumption, lifestyle behaviours were similar for the childless sample compared to the adult female population in Australia.ConclusionsChildless women may be at a greater risk of experiencing poor physical and mental health when compared to the Australian population. A woman&rsquo;s health and wellbeing during her reproductive years may have longer term health consequences and as such the health and wellbeing of childless women requires further investigation to identify and address implications for the provision of health (and other social) services for this growing population group.<br /