| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m16.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | 6qtX3pFwXQZ3r59YDa/H2krt |
| Repository | sid.inpe.br/iris@1916/2005/08.01.14.25 (restricted access) |
| Last Update | 2005:08.01.03.00.00 (UTC) administrator |
| Metadata Repository | sid.inpe.br/iris@1916/2005/08.01.14.25.40 |
| Metadata Last Update | 2018:06.05.01.16.06 (UTC) administrator |
| Secondary Key | INPE-12915-PRE/8197 |
| ISSN | 0038-0938 1573-093X |
| Citation Key | SilvaLaCaKaCoLeRo:2005:DiCoSp |
| Title | Diffuse component spectra of solar active regions at submillimeter wavelengths  |
| Project | Radiofísica / CRAAM: Centro de radioastronomia e astrofísica |
| Year | 2005 |
| Month | Apr. |
| Access Date | 2024, May 06 |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 362 KiB |
| 2. Context | |
| Author | 1 Silva, Adriana V. R. 2 Lagana, Tatiana F. 3 Castro, C. Guillermo Gimenez de 4 Kaufmann, Pierre 5 Costa, Joaquim Eduardo Rezende 6 Levato, Hugo 7 Rovira, Marta |
| Resume Identifier | 1 2 3 4 5 8JMKD3MGP5W/3C9JHF8 |
| Group | 1 2 3 4 5 DAS-INPE-MCT-BR |
| Affiliation | 1 Universidade Presbiteriana Mackenzie (CRAAM) 2 Universidade Presbiteriana Mackenzie (CRAAM) 3 Universidade Presbiteriana Mackenzie (CRAAM) 4 Universidade Presbiteriana Mackenzie (CRAAM) 5 Instituto Nacional de Pesquisas Espaciais, Divisão de Astrofísica (INPE.DAS) 6 Complejo Astronómico el Leoncito 7 Instituto de Astronomia y Fisica del Espacio |
| Journal | Solar Physics |
| Volume | 227 |
| Number | 2 |
| Pages | 265-281 |
| History (UTC) | 2005-08-18 11:11:14 :: sergio -> administrator :: 2006-09-28 22:30:00 :: administrator -> sergio :: 2008-01-07 12:52:53 :: sergio -> marciana :: 2008-04-02 17:17:55 :: marciana -> administrator :: 2008-06-10 22:39:33 :: administrator -> marciana :: 2011-05-21 03:10:15 :: marciana -> administrator :: 2018-06-05 01:16:06 :: administrator -> marciana :: 2005 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Keywords | ASTROPHYSICS Solar active regions Slowly varying component Radio emission Millimeter wavelengths Sun MM Microns ASTROFÍSICA Regiões solares ativas Emissão de raios Sol |
| Abstract | Solar maps at 212 and 405 GHz obtained by the Solar Submillimetric Telescope (SST) show regions of enhanced brightness temperature, which coincide with the location of active regions. A statistical study of the radio emission from these active regions was performed for the first time at such high frequencies during 23 days on June and July 2002, when the atmospheric opacity was low. The brightest regions on the maps were chosen for this study, where the brightness excess observed varies from 3 to 20% above quiet Sun levels (i.e., 200-1000 K) at both wavelengths. Sizes of the regions of enhanced emission calculated at half the maximum value were estimated to be between 2' and 7'. These sizes agree with observed sizes of active regions at other wavelengths such as H alpha and ultraviolet. An important result is that the flux density spectra of all sources increase toward submillimeter frequencies, yielding flux density spectral index with an average value of 2.0. The flux density of the active region sources were complemented with that from maps at 17 and 34 GHz from the Nobeyama Radio Heliograph. The resulting spectra at all four frequencies were fit considering the flux density to be due to thermal bremsstrahlung from the active region. In the calculations, the source radius was assumed to be the mean of the measured values at 212 and 405 K. The effective temperatures of the radio emitting source, assumed homogeneous, obtained from this fit were 0.6-2.9 x 10(4) K, for source diameters of 2'-7'. |
| Area | CEA |
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDAS > Diffuse component spectra... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| Language | en |
| Target File | diffuse component.pdf |
| User Group | administrator marciana sergio |
| Visibility | shown |
| Copy Holder | SID/SCD |
| Archiving Policy | denypublisher denyfinaldraft12 |
| Read Permission | deny from all and allow from 150.163 |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/3ETR8EH |
| Dissemination | WEBSCI; PORTALCAPES. |
| Host Collection | sid.inpe.br/banon/2003/08.15.17.40 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyright creatorhistory descriptionlevel documentstage doi e-mailaddress electronicmailaddress format isbn label lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress readergroup rightsholder schedulinginformation secondarydate secondarymark session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url versiontype |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |