Discovering Extraordinary Stars in the Kepler Field

Table of Contents

1. Introduction
2. Background Information
   • Traditional Custodians of the Land
   • Purpose of the Seminar Series
3. Challenges Faced Due to COVID-19
   • Impact on International Seminars
   • Time Zone Differences
4. Importance of Networking for Junior Astronomers
5. Seminar Format and Schedule
6. Availability of Recorded Talks
7. Adherence to Meeting Code of Conduct
8. Technical Limitations and Interruptions
9. Introduction to Speaker 1 - Danik Waters
   • Research Background and Affiliation
   • Topic of Discussion
10. Introduction to Speaker 2 - Arthur Pools
    • Research Background and Affiliation
    • Topic of Discussion
11. The Study of Red Giants in the Kepler Field
    • Significance of Substructures in the Halo
    • Combining Asymmetric Data with Astro Seismology
    • Characteristics of Red Giants
12. Model-Based Corrections in Seismological Studies
    • Overestimation of Masses in Red Giants
    • Published Corrections and Their Impact
13. Red Giants observed in the Study
    • Spectroscopy and Analysis of Dynamics
    • GRID-Based Modeling
14. Comparison and Analysis of Results
    • Mass Discrepancies from Epstein's Study
    • Implications of Mass Values
15. Membership of Stars in Sequoia Sausage
    • Chemical Analysis and Age Estimations
    • Dynamics and Astronomy Solutions
16. Conclusion

Introduction

Welcome to the SJ 3D ECR Astronomers in Australia Seminar Series! This seminar series aims to bring together researchers and scientists in the field of astrophysics to share their knowledge and insights. In this article, we will provide an overview of the seminar series, the challenges faced due to the COVID-19 pandemic, and the importance of networking for junior astronomers. We will also introduce the two speakers for this session, Danik Waters and Arthur Pools, and discuss the topics they will be presenting. Additionally, we will Delve into the study of red giants in the Kepler Field and the model-based corrections applied in seismological studies. Finally, we will analyze the results of the study and discuss the membership of stars in Sequoia Sausage. So, let's dive in!

Background Information

Before we delve into the details of the seminar series and the topics of discussion, it is essential to acknowledge the traditional custodians of the land on which We Are meeting today. The Aboriginal and Torres Strait Islander people have long served as Australia's first astronomers, and their knowledge and wisdom Continue to influence our understanding of the Universe. We pay our respects to their ancestors and elders, acknowledging their rich heritage.

The SJ 3D ECR Astronomers in Australia Seminar Series is organized by Australia3D, the Australian Research Council Centre of Excellence for Oscara Astrophysics in Three Dimensions. The goal of this seminar series is to facilitate the exchange of ideas and research findings among astronomers, particularly during the COVID-19 pandemic when international travel and in-person conferences are limited.

Challenges Faced Due to COVID-19

The COVID-19 pandemic has posed numerous challenges to the scientific community, particularly regarding international seminars and conferences. With travel restrictions and safety concerns, many researchers have been unable to attend conferences or present their work in person. This poses a significant disadvantage, especially for junior astronomers who rely on such opportunities to establish connections and enter the job market.

Furthermore, the time zone differences in virtual conferences like this one often lead to inconvenient meeting times. Astronomers from different parts of the world may find themselves attending seminars at unusual hours, affecting their ability to actively participate and engage with the speakers.

Importance of Networking for Junior Astronomers

Networking plays a crucial role in the career development of junior astronomers. Conferences and seminars provide a platform for them to showcase their research, gain valuable feedback, and connect with established scientists in their field. However, with limited opportunities for in-person interactions, virtual seminars like this one become vital for junior astronomers to maintain and expand their network.

By attending this seminar series, junior astronomers can engage with experienced researchers, learn about the latest advancements in their field, and establish connections that can benefit their careers. Despite the challenges posed by COVID-19, this seminar series aims to provide a platform for networking and knowledge sharing.

Seminar Format and Schedule

The SJ 3D ECR Astronomers in Australia Seminar Series features two talks in each session, each lasting 20 minutes, followed by a 5-minute question and answer session. The seminar Sessions are recorded and will be made available on the Asteroid 3D YouTube Channel for educational and scientific purposes. By attending this seminar, You agree to abide by the AHSJA3D meeting code of conduct, ensuring a respectful and inclusive environment for all participants.

Please keep in mind that due to the limitations of virtual platforms like Zoom, there may be interruptions during the talks. Dr. Jeffrey Simpson, the presenter for this session, may need to interrupt the speakers verbally when there are five minutes left in their talks. This is to ensure the smooth flow of the seminar and Timely completion of each presentation.

Introduction to Speaker 1 - Danik Waters

Our first speaker for this session is Danik Waters, a postdoc at the University of New South Wales in Sydney, Australia. He will be sharing insights from his research on metapop giant stars in the Kepler Field. Danik's work focuses on understanding the formation and evolution of the Milky Way using galactic archaeology techniques. He combines asymmetric data with spectroscopy and astro seismology provided by the Kepler mission to gain a comprehensive understanding of red giants. Let's dive into the details of Danik's research and the significant findings from his study.

Introduction to Speaker 2 - Arthur Pools

Our Second speaker is Arthur Pools, a PhD candidate at the Research School of Astronomy Astrophysics at the Australian National University. Arthur will be presenting his work on exploring the properties of red giants in the Kepler Field. His research utilizes high-resolution spectroscopy and astro seismology to determine the fundamental parameters of these stars. By combining data from Gaia and ground-based spectroscopy, Arthur aims to gain insights into the masses and ages of red giants. Let's delve into the details of Arthur's research and the fascinating discoveries he has made.

The Study of Red Giants in the Kepler Field

The study of red giants in the Kepler Field has garnered significant Attention in recent years. The identification of substructures in the halo, made possible by the Gaia mission, has provided new insights into the formation and evolution of the Milky Way. These red giants exhibit solar-like oscillations and are characterized by their Gaussian-Shaped power spectrum. The frequency of maximum power (numax) and the average frequency separation (delta nu) play a crucial role in understanding the properties of these stars.

Model-based corrections have been developed to address the overestimation of masses observed in red giants. These corrections aim to refine the scaling relations used in seismological studies to determine the fundamental parameters of these stars accurately. However, discrepancies in mass values persist, necessitating further research and analysis. The study conducted by Danik Waters and Arthur Pools aims to combine spectroscopy, astro seismology, and analysis of dynamics to gain a deeper understanding of the properties and characteristics of red giants.

Comparison and Analysis of Results

Upon comparing the results of the study with the findings from Epstein's research, it becomes evident that the model-based corrections have yielded lower masses for the observed red giants. However, even with the corrections applied, the masses of the red giants from this study are still higher than expected. This discrepancy implies that these stars may not belong to in situ or halo stars. Further analysis is required to understand the origin and nature of these red giants.

Additionally, the membership of stars in the Sequoia Sausage, an accreted galaxy, is explored. By analyzing the chemical composition and dynamics of the stars, the researchers aim to determine if these red giants are indeed members of the Sequoia Sausage. The analysis shows that some of the stars have characteristics and properties that Align with the expected features of Sequoia Sausage members. However, further investigation and quantification are necessary to confirm their membership definitively.

Conclusion

The SJ 3D ECR Astronomers in Australia Seminar Series provides a valuable platform for researchers to share their findings and collaborate with others in the field. Despite the challenges posed by the COVID-19 pandemic, this seminar series aims to foster knowledge sharing and networking among astronomers. The research presented by Danik Waters and Arthur Pools sheds light on the properties and characteristics of red giants in the Kepler Field. By combining spectroscopy, astro seismology, and analysis of dynamics, the researchers have made significant strides in understanding the formation and evolution of these stars. The study's findings also provide insights into the membership of stars in the Sequoia Sausage. However, further research is necessary to validate and quantify these conclusions. Overall, the seminar series serves as a valuable platform for researchers to exchange ideas, broaden their knowledge, and establish connections within the scientific community.