Título:New Infrastructure and Processes for Time-Domain Followup

Descrição:Time domain and multi-messenger astrophysics are rapidly growing and important modes of observational astronomy. The commissioning of LSST and the increasing sensitivity of facilities such as LIGO and IceCube mean that both rapid-response and long-term flexible scheduling capabilities will be essential. Significant effort by a variety of groups is being put into developing the components of a follow-up system for dynamically turning survey alerts into data. This system consists of: 1) brokers that will aggregate, classify, and filter alerts; 2) Target Observation Managers (TOMs) that are used by science teams for prioritizing targets and managing observations and data; and 3) observatory interfaces, schedulers, and facilities along with data reduction software and science archives. These tools will also be beneficial to all users of these facilities. This presentation will review the current status of this developing network with emphasis on the efforts of the Astronomical Event Observatory Network (AEON), a collaboration between Las Cumbres Observatory, NOAO/SOAR, and Gemini, and outstanding issues will be discussed.

Palestrante:Bryan Miller

Instituto:Gemini Observatory

Data:2019-07-25

Hora:11:00

Local:Página do LIneA - http://www.linea.gov.br/
Seminários - http://www.linea.gov.br/seminarios/

Título:Weak lensing by large-scale structure as an accurate probe of cosmology and much more!

Descrição:Weak lensing by large-scale structure is one of the most promising techniques to learn more about the nature of dark energy by mapping the dark matter distribution in the Universe as a function of distance. Weak lensing has also developed into the main tool to determine the masses of collapsed structures, from clusters to galaxies, enabling new studies of scaling relations. I will review the recent progress in this active area of research and discuss the prospects for future projects, such as Euclid.

Palestrante:Henk Hoekstra

Instituto:Leiden University

Data:2019-07-18

Hora:11:00

Local:Página do LIneA - http://www.linea.gov.br/
Seminários - http://www.linea.gov.br/seminarios/

Título:Probing the vicinity of the galactic center black hole with LISA

Descrição:The era of gravitational-wave astronomy was opened in 2015 with the first direct detection by LIGO of gravitational radiation emitted during the coalescence of two 30 Solar mass black holes. The planned Laser Interferometer Space Antenna (LISA) will detect gravitational waves generated during the coalescence of supermassive black hole binaries and the inspiral of stellar mass compact objects into massive black holes. I will present the first fully relativistic study of gravitational radiation from bodies in circular equatorial orbits around the massive black hole at the Galactic Center, Sgr A*. The signal-to-noise ratio in the gravitational wave detector LISA, as well as the time spent in LISA band, have been evaluated for main-sequence stars, brown dwarfs and compact objects. I will argue that Sgr A* is a valuable target for LISA.

Palestrante:Alexandre Le Tiec

Instituto:Observatoire de Paris

Data:2019-07-04

Hora:11:00

Local:http://www.linea.gov.br/seminarios/

Título:Decoding the Universe with Cosmic Surveys

Descrição:Modern cosmology is built on a robust foundation termed the ?CDM model. The ?CDM model has been remarkably successful — it is able to explain a large range of observational data with only six parameters. There are, however, unresolved questions that leave cosmologists unsatisfied: What is Dark Matter? What is Dark Energy? With the increasingly powerful data, is ?CDM still internally consistent within multiple cosmological probes? In this talk I describe a program where we seek to answer these questions using information in the large-scale structure, as recorded by state-of-the-art cosmological surveys. I will focus on a series of analyses using two-point functions of different cosmic fields and describe ongoing work to go beyond the standard two-point framework.

Palestrante:Chihway Chang

Instituto:University of Chicago

Data:2019-06-27

Hora:11:00

Local:Página do LIneA - http://www.linea.gov.br/seminarios/