Search
References
Objects
User-defined list
Download data
Statistics
Papers & Acknowledgement
Citation tool
☰
Display data from paper
Select data type:
SiO
IZU95 - SiO Maser Survey of the Galactic Bulge IRAS Sources. III. Kinematics of the Bulge Stars
Short title
: Izumiura et al. (1995)
Authors
: Izumiura, H. Deguchi, S. Hashimoto, O. Nakada, Y. Onaka, T. Ono, T. Ukita, N. Yamamura, I.
Journal
: Astrophysical Journal v.453, p.837
Bibcode
:
1995ApJ...453..837I
Abstract
We have surveyed IRAS sources toward the Galactic bulge in the SiO J = 1-0, upsilo = 1 and 2 transitions. The sources were selected from the IRAS Point Source Catalog on the basis of the IRAS 25/12 microns flux density ratio, extracting dust-enshrouded objects at distances of 8 kpc. SiO masers were detected in 79 of the 129 sources we surveyed in the region of l < 15° and 3° < b < 15° (excluding the strips of 4° < b < 5° and 7 < b < 8°). The sources are divided into disk and bulge members based on the observed infrared luminosity. The SiO maser properties of the present samples are quite similar to the maser properties of the SiO sources that were found in the strips of b = 4°-5° and 7°-8° in previous studies. A full discussion of the radial velocities of the entire bulge SiO maser sources is given. Rotation curve analysis shows that the radial velocities of the northern sources are systematically shifted from the radial velocities of the southern sources. If this shift is interpreted as being the result of a tilt of the rotation axis of the bulge, the tilt angle is derived to be about 7° from the Galactic longitudinal circle. After correcting the effect of the tilt on the radial velocities, we obtain an average shift of the radial velocity of -17.7±7.6 km s
-1
at zero Galactic longitude for the bulge sources. For the disk sources, in contrast, we get an average shift of the radial velocity nearly equal to zero. This fact indicates that (1) the local standard of rest is moving toward the Galactic center direction, and/or (2) a streaming motion of stars in the Galactic bulge is observed. The velocity dispersion of the bulge sources in the rectangular area of l < 4° and b < 5° is found to be about 110 km s
-1
The dispersion of the bulge sources in the remaining area is about 70 km s
-1
, which is close to the dispersion of 60-70 km s
-1
of disk stars. Several forbidden regions (holes) are recognizable in the l - upsilo map of sampled stars for particular ranges of radial velocities, no star can be found at some Galactic longitudes. The positions of such holes in the l - upsilo map correspond to the contour dips in the H I l - upsilo map taken at low Galactic latitude (b < 3°). This may be evidence for complex streaming motion of stars resulting from a bar structure in the Galactic bulge.
Download as
:
Table (CSV)
View as list of objects
Detection table from Izumiura et al. (1995)
Export table to csv
Hide
/
Show
individual components
Non-detection table from Izumiura et al. (1995)
Export table to csv
Hide
/
Show
individual components
Get selected data
X
DSS colored
2MASS colored
WISE colored
SDSS color
IRAC color I1,I2,I4
GLIMPSE 360
PACS color (70-160 um)
SPIRE color (250-500 um)
NVSS (1.4GHz)
ATLASGAL 870 um
ATLASGAL 870 um + Planck
Bolocam 1.1 mm
UKIDSS K
Download UKIDSS K FITS
2MASS K
Download 2MASS K FITS
select MAX(sio_data_all.ra_hms) as ra_hms,MAX(sio_data_all.dec_dms) as dec_dms,MAX(sio_data_all.source_name) as source_name,MAX(sio_data_all.ra) as ra,MAX(sio_data_all.dec) as dec,MAX(sio_data_all.l) as l,MAX(sio_data_all.b) as b,MAX(sio_data_all.grp) as grp,MAX(sio_data_all.other_name) as other_name,MAX(sio_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(sio_data_all.line) as line,MAX(sio_data_all.vrange) as vrange,MAX(sio_data_all.vpeak) as vpeak,MAX(sio_data_all.peak) as peak,MAX(sio_data_all.fwhm) as fwhm,MAX(sio_data_all.int) as int,MAX(sio_data_all.rms) as rms,MAX(sio_data_all.units) as units,MAX(sio_data_all.units_rms) as units_rms,MAX(sio_data_all.date_txt) as date_txt,MAX(sio_data_all.telescope_ref) as telescope_ref,MAX(sio_data_all.telescope_conf) as telescope_conf,MAX(sio_data_all.v_step) as v_step,MAX(sio_data_all.beam) as beam,MAX(sio_data_all.beam_maj) as beam_maj,MAX(sio_data_all.beam_min) as beam_min,MAX(sio_data_all.beam_pa) as beam_pa,MAX(sio_data_all.ref) as ref,MAX(sio_data_all.list_ref) as list_ref,MAX(sio_data_all.ascii) as ascii,MAX(sio_data_all.image) as image,MAX(sio_data_all.descr) as descr,MAX(sio_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(sio_data_all.dist) as dist,1 as dist_parallax,MAX(sio_data_all.date_txt) as date_txt,MAX(line_det) as line_det,MAX(type) as type,MAX(simbad_types_cat) as simbad_types_cat FROM sio_data_all LEFT JOIN all_objects_withmet ON sio_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' WHERE ref ilike 'IZU95' AND detected=true AND hide=false GROUP BY ref
select sio_data_all.ra_hms,sio_data_all.dec_dms,sio_data_all.source_name,sio_data_all.ra,sio_data_all.dec,sio_data_all.l,sio_data_all.b,sio_data_all.grp,sio_data_all.other_name,sio_data_all.other_desc,sio_data_all.thermal,sio_data_all.line,sio_data_all.vrange,sio_data_all.vpeak,sio_data_all.peak,sio_data_all.fwhm,sio_data_all.int,sio_data_all.rms,sio_data_all.units,sio_data_all.units_rms,sio_data_all.date_txt,sio_data_all.telescope_ref,sio_data_all.telescope_conf,sio_data_all.v_step,sio_data_all.beam,sio_data_all.beam_maj,sio_data_all.beam_min,sio_data_all.beam_pa,sio_data_all.ref,sio_data_all.list_ref,sio_data_all.ascii,sio_data_all.image,sio_data_all.descr,sio_data_all.id,sio_data_all.mjy_flag,sio_data_all.rms_mjy_flag,sio_data_all.dist,sio_data_all.dist_parallax,sio_data_all.date_txt,line_det,type,simbad_types_cat FROM sio_data_all LEFT JOIN all_objects_withmet ON sio_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' WHERE ref ilike 'IZU95' AND detected=true AND hide=false ORDER BY detected DESC,id