Skip to main content

10 Result(s)

within M. J. Reid Remove this filter Astronomy, Observations and Techniques Remove this filter

and

  1. No Access

    Article

    The Sub-Pc Scale Accretion Disk of Ngc 4258

    Water megamasers have been found to trace parsec/sub-parsec, circumnuclear accretion disks in several AGN (e.g., Circinus, NGC 1068 & NGC 4258). High-spatial (0.5 mas) and velocity resolution (0.2 km s−1) VLBA im...

    E. M. L. Humphreys, A. L. Argon, L. J. Greenhill… in Astrophysics and Space Science (2005)

  2. No Access

    Chapter and Conference Paper

    Shocks in the Radio Photospheres of Long Period Variable Stars

    At a distance of a few stellar radii and beyond from the center of a Mira variable, dust condenses (see Danchi et al. 1994) and mass begins to stream away from the star as a result of radiation pressure on the...

    M. J. Reid, K. M. Menten in Dust and Molecules in Evolved Stars (1998)

  3. No Access

    Article

    Shocks in the Radio Photospheres of Long Period Variables Stars

    M. J. Reid, K. M. Menten in Astrophysics and Space Science (1997)

  4. No Access

    Chapter and Conference Paper

    Proper motion studies of H2O masers

    The work of the CfA group over the past decade to measure the proper motions of H2O masers in our Galaxy is described. The distances to 7 masers have been measured and the distance to the Galactic Center, Ro, is ...

    J. M. Moran, M. J. Reid, C. R. Gwinn in Astrophysical Masers (1993)

  5. No Access

    Chapter and Conference Paper

    VLBI observations of the water vapor megamaser in IC10

    We present VLBI synthesis observations of the water vapor megamaser in the south eastern region of IC10. We compare our spectrum with earlier single dish spectra and conclude that the maser is highly variable.

    A. L. Argon, M. J. Reid, J. M. Moran, K. M. Menten, C. Henkel… in Astrophysical Masers (1993)

  6. No Access

    Chapter and Conference Paper

    Preliminary results from a study of the proper motion of water vapor masers in cepheus A

    Preliminary results from a study of the proper motions of water vapor masers associated with HII regions in Cepheus A are presented. The masers lie in two distinct clumps near the peaks in intensity of the HII...

    T. V. Cawthorne, J. M. Moran, M. J. Reid in Astrophysical Masers (1993)

  7. No Access

    Chapter and Conference Paper

    Proper motions of the oh masers in W3(OH)

    Using data from a seven-telescope VLBI experiment, we have remapped the 1665-MHz OH maser emission from W3(OH), a site of current star formation roughly 2.2 kpc distant. Both circular polarizations were observ...

    E. E. Bloemhof, M. J. Reid, J. M. Moran in The Physics and Chemistry of Interstellar … (1989)

  8. No Access

    Chapter and Conference Paper

    Proper Motions of H2O Masers in W49(N) and the Distance to the Galactic Center

    A distance of R 0 = 7.6 ±1.6 kpc for the galactic center is given by comparison of expansion parallax of a cluster of H2O masers in W49(N) with the kinematic distance of that source. Data from add...

    C. R. Gwinn, J. M. Moran, M. J. Reid, M. H. Schneps, R. Genzel… in The Center of the Galaxy (1989)

  9. No Access

    Chapter and Conference Paper

    The nuclear jet in M87

    J. A. Biretta, M. J. Reid in Active Galactic Nuclei (1988)

  10. No Access

    Chapter

    VLBI Observations of M87

    On 1980 February 20 we conducted an 8-station intercontental VLBI experiment in order to study the nucleus and jet of M87 at 1666.6 MHz in right circular polarization. Our array was sensitive to structures fro...

    M. J. Reid, J. H. M. M. Schmitt, F. N. Owen, R. S. Booth… in Extragalactic Radio Sources (1982)