Tartalom
Képek
Kép feltöltése
DSS Images Other Images
Kapcsolódó cikkek
CHARM2: An updated Catalog of High Angular Resolution Measurements
We present an update of the Catalog of High Angular ResolutionMeasurements (CHARM, Richichi & Percheron \cite{CHARM}, A&A,386, 492), which includes results available until July 2004. CHARM2 is acompilation of direct measurements by high angular resolution methods,as well as indirect estimates of stellar diameters. Its main goal is toprovide a reference list of sources which can be used for calibrationand verification observations with long-baseline optical and near-IRinterferometers. Single and binary stars are included, as are complexobjects from circumstellar shells to extragalactic sources. The presentupdate provides an increase of almost a factor of two over the previousedition. Additionally, it includes several corrections and improvements,as well as a cross-check with the valuable public release observationsof the ESO Very Large Telescope Interferometer (VLTI). A total of 8231entries for 3238 unique sources are now present in CHARM2. Thisrepresents an increase of a factor of 3.4 and 2.0, respectively, overthe contents of the previous version of CHARM.The catalog is only available in electronic form at the CDS viaanonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/431/773
| CHARM: A Catalog of High Angular Resolution Measurements
The Catalog of High Angular Resolution Measurements (CHARM) includesmost of the measurements obtained by the techniques of lunaroccultations and long-baseline interferometry at visual and infraredwavelengths, which have appeared in the literature or have otherwisebeen made public until mid-2001. A total of 2432 measurements of 1625sources are included, along with extensive auxiliary information. Inparticular, visual and infrared photometry is included for almost allthe sources. This has been partly extracted from currently availablecatalogs, and partly obtained specifically for CHARM. The main aim is toprovide a compilation of sources which could be used as calibrators orfor science verification purposes by the new generation of largeground-based facilities such as the ESO Very Large Interferometer andthe Keck Interferometer. The Catalog is available in electronic form atthe CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/386/492, and from theauthors on CD-Rom.
| The carbon star IRAS 06088+1909
We present first-time investigations, by means of several differenttechniques in the visual and infrared domains, of the source 06088+1909,discovered by the IRAS satellite and classified as a carbon star on thebasis of a SiC emission feature. Our interest for this source startedwith two lunar occultation events, which showed the presence of extendedcircumstellar emission on the scale of ~0farcs01 . Follow-upobservations by photometry, polarimetry, spectroscopy, speckleinterferometry and two more lunar occultations, have revealed manyinteresting characteristics, and in particular the presence of aflattened shell around the central star. By combining together allavailable observational evidence, we have been able to infer some of theproperties of this shell, such as its shape, size, temperature of thegrains, and mechanism of polarization. The object appears as one moreexample of the complexity existing in the environments of late-typegiants and AGB stars, similar to well-known cases such as the Egg Nebulaand the Red Rectangle. In the case of IRAS 06088+1909, it has beenpossible to conduct such a study at an unprecedented level of angularresolution. Based on observations collected at TIRGO (Gornergrat,Switzerland), and at Calar Alto (Spain). TIRGO is operated by CNR-CAISMIArcetri, Italy. Calar Alto is operated by the German-SpanishAstronomical Center.
| The TIRGO Lunar Occultation Program: Summary of the 1985-1995 Observations
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1996AJ....112.2786R&db_key=AST
| Precise positions, separations, and position angles of visual binaries
Astrometric observations of 212 large visual binaries are reported. Dataobtained with a GG 495 yellow filter on IIaD photographic plates usingthe Zen astrograph (aperture 20 cm and focal length 2077 mm) of theOsservatorio Astronomico di Brera during 1985-1986 are presented inextensive tables. The potential significance of these measurements forthe catalog being constructed for the Hipparcos space observatory isindicated.
| Etude pour chaque champ de l'absorption et de la repartition des vitesses radiales EN fonction de la distance.
Not Available
|
Új cikk hozzáadása
Kapcsolódó hivatkozások
- - (nincs kapcsolódó hivatkozás) -
Új link hozzáadása
Besorolás csoportokba:
|
Pozíciós és asztrometriai adatok
| Csillagkép: | Orion |
| Rektaszcenzió: | 06h11m03.46s |
| Deklináció: | +19°05'33.0" |
| Vizuális fényesség: | 9.08 |
| RA sajátmozgás: | 3.1 |
| Dec sajátmozgás: | -19.5 |
| B-T magnitude: | 10.611 |
| V-T magnitude: | 9.207 |
Katalógusok és elnevezések:
|
