Zobrazeno 1 - 10
of 567
pro vyhledávání: '"REID, M. J."'
Autor:
Bian, S. B., Wu, Y. W., Xu, Y., Reid, M. J., Li, J. J., Zhang, B., Menten, K. M., Moscadelli, L., Brunthaler, A.
Publikováno v:
2024 AJ 167:267
We report measurements of trigonometric parallax and proper motion for two 6.7 GHz methanol and two 22 GHz water masers located in the far portion of the Sagittarius spiral arm as part of the BeSSeL Survey. Distances for these sources are estimated f
Externí odkaz:
http://arxiv.org/abs/2405.11439
Autor:
Kuo, C. Y., Gao, F., Braatz, J. A., Pesce, D. W., Humphreys, E. M. L., Reid, M. J., Impellizzeri, C. M. V., Henkel, C., Wagner, J., Wu, C. E.
High precision mapping of H2O megamaser emission from active galaxies has revealed more than a dozen Keplerian H2O maser disks, which enable a ~4% uncertainty estimate of the Hubble constant as well as providing accurate masses for the central black
Externí odkaz:
http://arxiv.org/abs/2312.16382
Autor:
Reid, M. J., Miller-Jones, J. C. A.
In this paper we significantly improve estimates of distance to the X-ray binary systems Cyg X-3 and GRS 1915+105. We report a highly accurate trigonometric parallax measurement for Cyg X-3 using the VLBA at 43 GHz, placing the source at a distance o
Externí odkaz:
http://arxiv.org/abs/2309.15027
Autor:
Mai, Xiaofeng, Zhang, Bo, Reid, M. J., Moscadelli, L., Xu, Shuangjing, Sun, Yan, Zhang, Jingdong, Chen, Wen, Wen, Shiming, Luo, Qiuyi, Menten, Karl M., Zheng, Xingwu, Brunthaler, Andreas, Xu, Ye, Wang, Guangli
We report a trigonometric parallax measurement of 22 GHz water masers in the massive star-forming region G034.43+0.24 as part of the Bar and Spiral Structure Legacy (BeSSeL) Survey using the Very Long Baseline Array. The parallax is 0.330$\pm$50.018
Externí odkaz:
http://arxiv.org/abs/2303.09129
Autor:
Xu, Y., Bian, S. B., Reid, M. J., Li, J. J., Menten, K. M., Dame, T. M., Zhang, B., Brunthaler, A., Wu, Y. W., Moscadelli, L., Wu, G., Zheng, X. W.
We have measured trigonometric parallaxes for four water masers associated with distant massive young stars in the inner regions of the Galaxy using the VLBA as part of the BeSSeL Survey. G026.50$+$0.28. is located at the near end of the Galactic bar
Externí odkaz:
http://arxiv.org/abs/2101.01454
Autor:
Pesce, D. W., Braatz, J. A., Reid, M. J., Riess, A. G., Scolnic, D., Condon, J. J., Gao, F., Henkel, C., Impellizzeri, C. M. V., Kuo, C. Y., Lo, K. Y.
We present a measurement of the Hubble constant made using geometric distance measurements to megamaser-hosting galaxies. We have applied an improved approach for fitting maser data and obtained better distance estimates for four galaxies previously
Externí odkaz:
http://arxiv.org/abs/2001.09213
Autor:
Pesce, D. W., Braatz, J. A., Reid, M. J., Condon, J. J., Gao, F., Henkel, C., Kuo, C. Y., Lo, K. Y., Zhao, W.
As part of the survey component of the Megamaser Cosmology Project, we have discovered a disk megamaser system in the galaxy CGCG 074-064. Using the GBT and the VLA, we have obtained spectral monitoring observations of this maser system at a monthly
Externí odkaz:
http://arxiv.org/abs/2001.04581
Autor:
Reid, M. J., Brunthaler, A.
We report measurements with the Very Long Baseline Array of the proper motion of Sgr A* relative to two extragalactic radio sources spanning 18 years. The apparent motion of Sgr A* is -6.411 +/- 0.008 mas/yr along the Galactic plane and -0.219 +/- 0.
Externí odkaz:
http://arxiv.org/abs/2001.04386
Autor:
Immer, K., Li, J., Quiroga-Nuñez, L. H., Reid, M. J., Zhang, B., Moscadelli, L., Rygl, K. L. J.
We present trigonometric parallax and proper motion measurements toward 22 GHz water and 6.7 GHz methanol masers in 16 high-mass star-forming regions. These sources are all located in the Scutum spiral arm of the Milky Way. The observations were cond
Externí odkaz:
http://arxiv.org/abs/1911.06806
Autor:
Kuo, C. Y., Braatz, J. A., Impellizzeri, C. M. V., Gao, F., Pesce, D., Reid, M. J., Condon, J., Kamali, F., Henkel, C., Greene, J. E.
We present VLBI images and kinematics of water maser emission in three active galaxies: NGC 5728, Mrk 1, and IRAS 08452-0011. IRAS 08452-0011 is a triple-peaked H2O megamaser, consistent with a Keplerian rotating disk, indicating a black hole mass of
Externí odkaz:
http://arxiv.org/abs/1910.14314