Structure and evolution of planetary nebulae

Imperial Users onl

A long-range program in space astronomy - Position paper of the Astronomy Missions Board

Potential for advancement of astronomy by space program

Estudio en el infrarrojo lejano de estrellas evolucionadas de masa baja e intermedia usando datos espectroscópicos de los instrumentos de Herschel PACS y SPIRE

Tesis inédita de la Universidad Complutense de Madrid, Facultad de Ciencias Físicas, leída el 18-10-2019In this thesis, a far-infrared (FIR) study of evolved low and intermediate mass stars is presented. The characterization of these evolved stars is particularly interesting when we analyse their properties in the FIR and the sub-millimeter wavelength regions. Due to the very promising spectroscopic data of Herschel, PACS (50-220 m) and SPIRE (200-600m) observations have been included in this thesis to carry out a systematic an homogeneous study of a relatively big sample of evolved stars which cover dierent evolutionary stages (AGBs, post-AGBs and PNe) and chemical types. The first main step of this work was the systematic and homogeneous data reduction process developed for two dierent sample of sources observed with PACS and (or) SPIRE in spectroscopic mode. The stars included in the reprocessed sample were taken from the Herschel Science Archive, as they have been previously observed with these instruments as part of numerous observing programs. As a result two different web-based catalogues(https://throes.cab.inta-csic.es and https://throes-spire.cab.inta-csic.es) were created to offer to the whole scientific community, 220 science-ready spectroscopic data corresponding to114 dierent evolved stars observed with PACS and, also, 109 fully-reduced SPIRE spectra associated to 68 individual targets.En esta tesis se ha llevado a cabo un estudio homogéneo y sistemático de una amplia muestra de estrellas evolucionadas con masas menores a 8 masas solares observadas en el infrarrojo lejano y en el sub-milimétrico haciendo uso de los espectros generados con los instrumentos PACS (50-220 m ) y SPIRE (200-600 m) del telescopio espacial Herschel. La muestra incorporada en este estudio presenta una gran variedad de tipos químicos, así como diferentes estados evolutivos. Como primer paso, fue necesario realizar una recopilación de todas las observaciones espectroscópicas realizadas con PACS y SPIRE relacionadas con estrellas evolucionadas no masivas disponibles en el Archivo Científico de Herschel. Cada una de estos espectros formaban parte de diferentes programas de observación que se han ido llevando a cabo durante el tiempo de vida del telescopio espacial Herschel. Una vez identificadas las observaciones que queríamos incluir en nuestra tesis desarrollamos uno de las fases más importantes de este proyecto, la reducción sistemática de los datos. Esta reducción permitió generar observaciones completamente explotables desde un punto de vista científico, a partir de los datos"crudos" descargados del Archivo. Como resultado 220 espectros de PACS asociados a 114 objetos distintos y 109 espectros de SPIRE asociados a 68 estrellas, fueron incorporadas en sendos catálogos (uno para los datos de PACS y otro para los de SPIRE) para ser accesibles vía web, de forma pública, por toda la comunidad científica.Fac. de Ciencias FísicasTRUEunpu

NASA's university program: Active grants and research contracts, fiscal year 1976

NASA Field Centers and certain Headquarters Program Offices provide funds for those research and development activities in universities which contribute to the mission needs of that particular NASA element. Although NASA has no predetermined amount of money to devote to university activities, the effort funded each year is substantial. This annual report is one means of documenting the NASA-university relationship, frequently denoted, collectively, as NASA's University Program

NASA's university program: Active grants and research contracts, fiscal year 1978

As basic policy NASA believes that colleges and universities should be encouraged to participate in the space and aeronautics program to the maximum extent practicable. The NASA objective is to have them bring their scientific, engineering, and social research competence to bear on aerospace problems and on the broader social, economic, and international implications of NASA technical and scientific programs. This annual report is one means of documenting the NASA-university relationship, frequently denoted, collectively, as NASA University Program

NASA University Program Management Information System: FY 1995

The University Program Report, Fiscal Year 1995, provides current information and related statistics for grants/contracts/cooperative agreements active during the report period. NASA field centers and certain Headquarters program offices provide funds for those R&D activities in universities which contribute to the mission needs of that particular NASA element. This annual report is one means of documenting the NASA-university relationship, frequently denoted, collectively, as NASA's University Program

NASA university program management information system, FY 1994

The University Program report, Fiscal Year 1994, provides current information and related statistics for 7841 grants/contracts/cooperative agreements active during the reporting period. NASA field centers and certain Headquarters program offices provide funds for those activities in universities which contribute to the mission needs of that particular NASA element. This annual report is one means of documenting the NASA-university relationship, frequently denoted, collectively, as NASA's University Program

NASA's university program: Active grants and research contracts, fiscal year 1975

Active university research projects for Fiscal Year 1975 are reported by state, and foreign country. Cross indexes by: (1) grant/contract number; (2) field of science and engineering; (3) technical officer location; and (4) RTOP are included

NASA's university program: Active grants and research contracts, fiscal year 1974

Each entry includes institution and location, brief description of project, period of performance, principal investigator at institution, NASA technical officer (monitor), sponsoring NASA installation, interagency field of science or engineering classification C.A.S.E. category, grant or contract number, FY 74 obligations, cumulative obligations, and most recent RTOP coding. Entries are arranged alphabetically within state or country. Four cross indices are presented: (1) grant or contract number; (2) C.A.S.E. field or science or engineering; (3) NASA technical officer location; and (4) RTOP code