SGRAREGCSC ivo://nasa.heasarc/sgraregcsc NASA/GSFC HEASARC Yusef-Zadeh et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source Recent broad-band 34- and 44-GHz radio continuum observations of the Galactic center have revealed 41 massive stars identified with near-IR (NIR) counterparts, as well as 44 proplyd candidates within 30 arcseconds of Sgr A*. Radio observations obtained in 2011 and 2014 have been used to derive proper motions of eight young stars near Sgr A*. The accuracy of proper motion estimates based on NIR observations by Lu et al. (2009, ApJ, 690, 1463) and Paumard et al. (2006, ApJ, 643, 1011) have been investigated by using their proper motions to predict the 2014 epoch positions of NIR stars and comparing the predicted positions with those of radio counterparts in the 2014 radio observations. Predicted positions from Lu et al. show an rms scatter of 6 milliarcseconds (mas) relative to the radio positions, while those from Paumard et al. show rms residuals of 20 mas. In the reference paper, the authors also determine the mass-loss rates of 11 radio stars, finding rates that are on average ~2 times smaller than those determined from model atmosphere calculations and NIR data. Clumpiness of ionized winds would reduce the mass loss rate of WR and O stars by additional factors of 3 and 10, respectively. One important implication of this is a reduction in the expected mass accretion rate onto Sgr A* from stellar winds by nearly an order of magnitude to a value of a few x 10<sup>-7</sup> solar masses per year. The authors carried out A-array observations of the Galactic center region (VLA program 14A-232) in the Ka (9 mm, 34.5 GHz) band on 2014 March 9 in which they detected 318 compact radio sources within 30" of Sgr A*. The authors searched for NIR counterparts to these compact radio sources using high-angular resolution AOs-assisted imaging observations acquired with the VLT/NACO. A K<sub>s</sub>-band (central wavelength 2.18 micron) image was obtained in a rectangular dither pattern on 2012 September 12. L'-band (3.8 micron) observations were obtained during various observing runs between 2012 June and September. The authors found that 45 of the compact radio sources had stellar counterparts in the K<sub>s</sub> and L' bands. This table contains the details of the 318 compact radio sources detected at 34.5 GHz and their NIR counterparts. This table was created by the HEASARC in November 2016 based on CDS table J/ApJ/809/10, file table6.dat. This is a service provided by NASA HEASARC . 2015ApJ...809...10Y https://heasarc.gsfc.nasa.gov/W3Browse/all/sgraregcsc.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=sgraregcsc& GET text/xml 180 99999 true 266.41206 -29.01607647 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=sgraregcsc GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_sgraregcsc&Action=More+Options&Action=Parameter+Search&ConeAdd=1 RADIO CATALOG 0.0166666666666667 Radio public sgraregcsc Sgr A* Region Compact Radio Source Catalog source_number Sequential Identification Number for Each Source in the Catalog meta.id;src short nullable name Source Designation meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable error_radius Positional Precision arcsec stat.error;pos double nullable flux_34p5_ghz 34.5-GHz Peak Radio Intensity mJy/beam phot.flux.density;em.mm.30-50GHz double nullable flux_34p5_ghz_error 34.5-GHz Peak Radio Intensity Uncertainty mJy/beam stat.error;phot.flux.density;em.mm.30-50GHz double nullable nir_name NIR Identified Stellar Source meta.id.cross char nullable flux_2p18_um VLT/NACO Ks (2.18-um) Flux Density mJy phot.flux.density;em.IR.K double nullable flux_2p18_um_error VLT/NACO Ks (2.18-um) Flux Density Uncertainty mJy stat.error;phot.flux.density;em.IR.K double nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable int_flux_34p5_ghz_error 34.5-GHz Integrated Flux Uncertainty mJy stat.error;phot.flux.density;em.mm.30-50GHz double nullable flux_3p80_um_error VLT/NACO L-Prime (3.8um) Flux Density Uncertainty mJy stat.error;phot.flux.density;em.IR.3-4um double nullable flux_3p80_um VLT/NACO L-Prime (3.8um) Flux Density mJy phot.flux.density;em.IR.3-4um double nullable major_axis Deconvolved Source Major Axis Size (Theta_a_) mas phys.angSize.smajAxis int nullable minor_axis Deconvolved Source Minor Axis Size (Theta_b_) mas phys.angSize.sminAxis short nullable position_angle Deconvolved Source Position Angle degree pos.posAng short nullable int_flux_34p5_ghz 34.5-GHz Integrated Flux Density mJy phot.flux.density;em.mm.30-50GHz double nullable galcen_offset Angular Distance from Sgr A* arcsec pos.angDistance double nullable bii Galactic Latitude degree pos.galactic.lat double nullable lii Galactic Longitude degree pos.galactic.lon double nullable source_flags Flags [abc] Indicate Information on Detection or Radio Multiplicity meta.code;src char nullable ref_codes Numbers Indicates References for Source Information meta.ref char nullable