Christopher K Walker

  • 2333 Citations
  • 28 h-Index
1986 …2019

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1986

A new surface measuring technique using phase retrieval by amplitude interferometry

Ulich, B. L., Walker, C. K., Philips-Walker, C. E., Davison, W. B., Davis, J. H. & Mayer, C. E., May 12 1986, In : Proceedings of SPIE - The International Society for Optical Engineering. 608, p. 55-62 8 p.

Research output: Contribution to journalArticle

1 Scopus citations
1990

1.3 millimeter continuum observations of cold molecular cloud cores

Walker, C. K., Adams, F. C. & Lada, C. J., Feb 1 1990, In : Astrophysical Journal. 349, 2, p. 515-528 14 p.

Research output: Contribution to journalArticle

93 Scopus citations

Observations of the dense gas in the IRAS 16293-2422 outflow system

Walker, C. K., Carlstrom, J. E., Bieging, J. H., Lada, C. J. & Young, E. T., Nov 20 1990, In : Astrophysical Journal. 364, 1, p. 173-177 5 p.

Research output: Contribution to journalArticle

26 Scopus citations
1991

The edges of molecular clouds: Fractal boundaries and density structure

Falgarone, E., Phillips, T. G. & Walker, C. K., Sep 1 1991, In : Astrophysical Journal. 378, 1, p. 186-201 16 p.

Research output: Contribution to journalArticle

231 Scopus citations
1992

A low-noise 492 GHz SIS waveguide receiver

Walker, C. K., Kooi, J. W., Chant, M., LeDuc, H. G., Schaffer, P. L., Carlstrom, J. E. & Phillips, T. G., Jun 1992, In : International Journal of Infrared and Millimeter Waves. 13, 6, p. 785-798 14 p.

Research output: Contribution to journalArticle

58 Scopus citations

Submillimeter detection of extragalactic C I emission: IC 342

Büttgenbach, T. H., Keene, J., Phillips, T. G. & Walker, C. K., Sep 20 1992, In : Astrophysical Journal. 397, 1 PART 2, p. L15-L17

Research output: Contribution to journalArticle

20 Scopus citations
1993

Detection of the carbon monoxide ion (CO+) in the interstellar medium and a planetary nebula

Latter, W. B., Walker, C. K. & Maloney, P. R., Dec 20 1993, In : Astrophysical Journal. 419, 2 PART 2, p. L97-L100

Research output: Contribution to journalArticle

50 Scopus citations

Silicon Micromachined Waveguides for Millimeter-Wave and Submillimeter-Wave Frequencies

McGrath, W. R., Walker, C., Yap, M. & Tai, Y. C., Mar 1993, In : IEEE Microwave and Guided Wave Letters. 3, 3, p. 61-63 3 p.

Research output: Contribution to journalArticle

84 Scopus citations

The detection of [C I] in molecular outflows associated with young stellar objects

Walker, C. K., Narayanan, G., Büttgenbach, T. H., Carlstrom, J. E., Keene, J. & Phillips, T. G., Oct 1 1993, In : Astrophysical Journal. 415, 2, p. 672-679 8 p.

Research output: Contribution to journalArticle

8 Scopus citations

The IRAS 16293 - 2422 cloud core: A study of a young binary system

Walker, C. K., Carlstrom, J. E. & Bieging, J. H., Jan 10 1993, In : Astrophysical Journal. 402, 2, p. 655-666 12 p.

Research output: Contribution to journalArticle

45 Scopus citations
1994

A lownoise 665 GHz SIS quasi-particle waveguide receiver

Kooi, J. W., Walker, C. K., LeDuc, H. G., Schaffer, P. L., Hunter, T. R., Benford, D. J. & Phillips, T. G., Mar 1994, In : International Journal of Infrared and Millimeter Waves. 15, 3, p. 477-492 16 p.

Research output: Contribution to journalArticle

25 Scopus citations

Observation of [C I] toward the GL 2591 and W28 A2 molecular outflows

Choi, M., Evans, N. J., Jaffe, D. T. & Walker, C. K., Nov 10 1994, In : Astrophysical Journal. 435, 2, p. 734-737 4 p.

Research output: Contribution to journalArticle

5 Scopus citations

Spectroscopic signatures of infall in young protostellar systems

Walker, C. K., Narayanan, G. & Boss, A. P., Aug 20 1994, In : Astrophysical Journal. 431, 2, p. 767-782 16 p.

Research output: Contribution to journalArticle

67 Scopus citations

Vibrationally excited CS: A new probe of conditions in young protostellar systems

Walker, C. K., Maloney, P. R. & Serabyn, E., Dec 20 1994, In : Astrophysical Journal. 437, 2 PART 2, p. L127-L130

Research output: Contribution to journalArticle

11 Scopus citations
1995

The dense gas component of outflows in the monoceros OB1 dark cloud

Wolf-Chase, G. A. & Walker, C. K., Jul 1 1995, In : Astrophysical Journal. 447, 1, p. 244-256 13 p.

Research output: Contribution to journalArticle

9 Scopus citations

The development of an 850 GHz waveguide receiver using tuned sis junctions on 1μm Si3N4 membranes

Kooi, J. W., Chan, M. S., Bin, M., Bumble, B., LeDuc, H. G., Walker, C. K. & Phillips, T. G., Feb 1 1995, In : International Journal of Infrared and Millimeter Waves. 16, 2, p. 349-362 14 p.

Research output: Contribution to journalArticle

4 Scopus citations

The relationship of dense gas to star formation in the Monoceros OB1 dark cloud

Wolf-Chase, G. A., Walker, C. K. & Lada, C. J., Mar 20 1995, In : Astrophysical Journal. 442, 1, p. 197-207 11 p.

Research output: Contribution to journalArticle

23 Scopus citations
1996

Evidence for multiple outbursts from the cepheus a molecular outflow

Narayanan, G. & Walker, C. K., Jan 1 1996, In : Astrophysical Journal. 466, 2 PART I, p. 844-865 22 p.

Research output: Contribution to journalArticle

46 Scopus citations
1997

Cyclops: A single beam 1.3 millimeter polarimeter

Glenn, J., Walker, C. K. & Young, E. T., Feb 1997, In : International Journal of Infrared and Millimeter Waves. 18, 2, p. 285-300 16 p.

Research output: Contribution to journalArticle

4 Scopus citations

HCO+ spectropolarimetry and millimeter continuum polarimetry of the DR 21 star-forming region

Glenn, J., Walker, C. K. & Jewell, P. R., Jan 1 1997, In : Astrophysical Journal. 479, 1 PART I, p. 325-331 7 p.

Research output: Contribution to journalArticle

19 Scopus citations

Millimeter-wave spectropolarimetry of evolved stars: Evidence for polarized molecular line emission

Glenn, J., Walker, C. K., Bieging, J. H. & Jewell, P. R., 1997, In : Astrophysical Journal. 487, 1 PART II, p. L89-L92

Research output: Contribution to journalArticle

Open Access
14 Scopus citations
1998

A parameterized study of the detection of infall in protostellar systems

Narayanan, G. & Walker, C. K., Jan 1 1998, In : Astrophysical Journal. 508, 2 PART II, p. 780-790 11 p.

Research output: Contribution to journalArticle

8 Scopus citations

The "blue-bulge" infall signature toward IRAS 16293-2422

Narayanan, G., Walker, C. K. & Buckley, H. D., Jan 1 1998, In : Astrophysical Journal. 496, 1 PART I, p. 292-310 19 p.

Research output: Contribution to journalArticle

37 Scopus citations
1999

Magnetic fields in star formation regions: 1.3 millimeter continuum polarimetry

Glenn, J., Walker, C. K. & Young, E. T., Feb 1 1999, In : Astrophysical Journal. 511, 2 PART 1, p. 812-821 10 p.

Research output: Contribution to journalArticle

30 Scopus citations
2001

Fabrication of a superconducting hot-electron bolometer receiver with micromachined waveguide components

Datesman, A. M., Zhang, J. Z., Lichtenberger, A. W. & Walker, C., Jan 1 2001, In : Biennial University/Government/Industry Microelectronics Symposium - Proceedings. p. 186-189 4 p.

Research output: Contribution to journalArticle

1 Scopus citations

Measuring the black hole spin in Sagittarius A

Melia, F., Bromley, B. C., Liu, S. & Walker, C. K., Jun 10 2001, In : Astrophysical Journal. 554, 1 PART 2, p. L37-L40

Research output: Contribution to journalArticle

31 Scopus citations

The antarctic submillimeter telescope and remote observatory (AST/RO)

Stark, A. A., Bally, J., Balm, S. P., Bania, T. M., Bolatto, A. D., Chamberlin, R. A., Engargiola, G., Huang, M., Ingalls, J. G., Jacobs, K., Jackson, J. M., Kooi, J. W., Lane, A. P., Lo, K. Y., Marks, R. D., Martin, C. L., Mumma, D., Ojha, R., Schieder, R., Staguhn, J. & 7 others, Stutzki, J., Walker, C. K., Wilson, R. W., Wright, G. A., Zhang, X., Zimmermann, P. & Zimmermann, R., May 2001, In : Publications of the Astronomical Society of the Pacific. 113, 783, p. 567-585 19 p.

Research output: Contribution to journalArticle

53 Scopus citations
2002

Detection of infall signatures toward serpens SMM4

Narayanan, G., Moriarty-Schieven, G., Walker, C. K. & Butner, H. M., Jan 20 2002, In : Astrophysical Journal. 565, 1 I, p. 319-330 12 p.

Research output: Contribution to journalArticle

15 Scopus citations
2003

A full-height waveguide to thin-film microstrip transition with exceptional RF bandwidth and coupling efficiency

Kooi, J. W., Chattopadhyay, G., Withington, S., Rice, F., Zmuidzinas, J., Walker, C. & Yassin, G., Mar 1 2003, In : International Journal of Infrared and Millimeter Waves. 24, 3, p. 261-284 24 p.

Research output: Contribution to journalArticle

66 Scopus citations

The Inner 200pc: Hot Dense Gas

Martin, C. L., Walsh, W. M., Xiao, K., Lane, A. P., Walker, C. K. & Stark, A. A., Sep 1 2003, In : Astronomische Nachrichten. 324, SUPPL.1, p. 93-99 7 p.

Research output: Contribution to journalArticle

1 Scopus citations
2004

Gas density, stability, and starbursts near the inner lindblad resonance of the milky way

Stark, A. A., Martin, C. L., Walsh, W. M., Xiao, K., Lane, A. P. & Walker, C. K., Oct 10 2004, In : Astrophysical Journal. 614, 1 II, p. L41-L44

Research output: Contribution to journalArticle

31 Scopus citations

Millimeter and submillimeter survey of the R coronae australis region

Groppi, C. E., Kulesa, C., Walker, C. & Martin, C. L., Sep 10 2004, In : Astrophysical Journal. 612, 2 I, p. 946-955 10 p.

Research output: Contribution to journalArticle

15 Scopus citations
2005

Fabrication and characterization of niobium diffusion-cooled hot-electron bolometers on silicon nitride membranes

Datesman, A. M., Schultz, J. C., Lichtenberger, A. W., Golish, D., Walker, C. K. & Kooi, J., Jun 1 2005, In : IEEE Transactions on Applied Superconductivity. 15, 2 PART I, p. 928-931 4 p.

Research output: Contribution to journalArticle

6 Scopus citations

Large-scale CO and [C I] emission in the ρ ophiuchi molecular cloud

Kulesa, C. A., Hungerford, A. L., Walker, C. K., Zhang, X. & Lane, A. P., May 20 2005, In : Astrophysical Journal. 625, 1 I, p. 194-209 16 p.

Research output: Contribution to journalArticle

28 Scopus citations

Warm, dense molecular gas in the ISM of starbursts, LIRGs, and ULIRGs

Narayanan, D., Groppi, C. E., Kulesa, C. A. & Walker, C. K., Sep 1 2005, In : Astrophysical Journal. 630, 1 I, p. 269-279 11 p.

Research output: Contribution to journalArticle

51 Scopus citations
2006

345 GHz prototype SIS mixer with integrated MMIC LNA

Pütz, P., Hedden, A., Gensheimer, P., Golish, D., Groppi, C. E., Kulesa, C., Narayanan, G., Lichtenberger, A., Kooi, J. W., Wadefalk, N., Weinreb, S. & Walker, C. K., Oct 1 2006, In : International Journal of Infrared and Millimeter Waves. 27, 10, p. 1365-1379 15 p.

Research output: Contribution to journalArticle

14 Scopus citations

Degree scale high resolution mapping of CO J=2-1 and 3-2 in giant molecular clouds

Peters, W. L., Bieging, J. H., Groppi, C. E., Kulesa, C. A., Walker, C. K., Hedden, A. S. & Puetz, P. S., Aug 1 2006, In : Proceedings of the International Astronomical Union. 2, S237, 1 p.

Research output: Contribution to journalArticle

Molecular line emission from gravitationally unstable protoplanetary disks

Narayanan, D., Kulesa, C. A., Boss, A. & Walker, C. K., Aug 20 2006, In : Astrophysical Journal. 647, 2 I, p. 1426-1436 11 p.

Research output: Contribution to journalArticle

24 Scopus citations

Molecular outflows in galaxy merger simulations with embedded active galactic nuclei

Narayanan, D., Cox, T. J., Robertson, B., Davé, R., Matteo, T. D. I., Hernquist, L., Hopkins, P., Kulesa, C. & Walker, C. K., May 10 2006, In : Astrophysical Journal. 642, 2 II, p. L107-L110

Research output: Contribution to journalArticle

35 Scopus citations

Star formation in the Northern cloud complex of NGC 2264

Hedden, A. S., Walker, C. K., Groppi, C. E. & Butner, H. M., Jul 1 2006, In : Astrophysical Journal. 645, 1 I, p. 345-356 12 p.

Research output: Contribution to journalArticle

1 Scopus citations
2007

A CO (J = 3-2) outflow survey of the Elias 29 region

Bussmann, R. S., Wong, T. W., Hedden, A. S., Kulesa, C. A. & Walker, C. K., Mar 1 2007, In : Astrophysical Journal. 657, 1 II, p. L33-L36

Research output: Contribution to journalArticle

11 Scopus citations
2008

Molecular star formation rate indicators in galaxies

Narayanan, D., Cox, T. J., Shirley, Y., Davé, R., Hernquist, L. & Walker, C. K., Sep 10 2008, In : Astrophysical Journal. 684, 2, p. 996-1008 13 p.

Research output: Contribution to journalArticle

90 Scopus citations

The hertz/VPM polarimeter: Design and first light observations

Krejny, M., Chuss, D., D'Aubigny, C. D., Golish, D., Houde, M., Hui, H., Kulesa, C., Loewenstein, R. F., Moseley, S. H., Novak, G., Voellmer, G., Walker, C. & Wollack, E., Aug 20 2008, In : Applied optics. 47, 24, p. 4429-4440 12 p.

Research output: Contribution to journalArticle

13 Scopus citations

The nature of co emission from z ∼ 6 quasars

Narayanan, D., Li, Y., Cox, T. J., Hernquist, L., Hopkins, P., Chakrabarti, S., Davé, R., Di Matteo, T., Gao, L., Kulesa, C., Robertson, B. & Walker, C. K., Jan 2008, In : Astrophysical Journal, Supplement Series. 174, 1, p. 13-30 18 p.

Research output: Contribution to journalArticle

36 Scopus citations

The role of galactic winds on molecular gas emission from galaxy mergers

Narayanan, E., Cox, T. J., Kelly, B., Davé, R., Hernquist, L., Matteo, T. D. I., Hopkins, P. F., Kulesa, C., Robertson, B. & Walker, C. K., Jun 1 2008, In : Astrophysical Journal, Supplement Series. 176, 2, p. 331-354 24 p.

Research output: Contribution to journalArticle

69 Scopus citations

The star formation rate-dense gas relation in galaxies as measured by HCN(3-2) emission

Bussmann, R. S., Narayanan, D., Shirley, Y. L., Juneau, S., Wu, J., Solomon, P. M., Vanden Bout, P. A., Moustakas, J. & Walker, C. K., 2008, In : Astrophysical Journal. 681, 2 PART 2, p. L73-L76

Research output: Contribution to journalArticle

34 Scopus citations
2009

An integrated optics beam combiner realized with magic-tees

Golish, D., Swain, M., Walker, C. & D'Aubigny, C. D., Aug 1 2009, In : Journal of Infrared, Millimeter, and Terahertz Waves. 30, 8, p. 884-898 15 p.

Research output: Contribution to journalArticle

Large-scale CO maps of the Lupus Molecular Cloud Complex

Tothill, N. F. H., Löhr, A., Parshley, S. C., Stark, A. A., Lane, A. P., Harnett, J. I., Wright, G. A., Walker, C. K., Bourke, T. L. & Myers, P. C., 2009, In : Astrophysical Journal, Supplement Series. 185, 1, p. 98-123 26 p.

Research output: Contribution to journalArticle

17 Scopus citations

The PLATO dome a site-testing observatory: Instrumentation and first results

Yang, H., Allen, G., Ashley, M. C. B., Bonner, C. S., Bradley, S., Cui, X., Everett, J. R., Feng, L., Gong, X., Hengst, S., Hu, J., Jiang, Z., Kulesa, C. A., Lawrence, J. S., Li, Y., Luong-Van, D., McCaughrean, M. J., Moore, A. M., Pennypacker, C., Qin, W. & 17 others, Riddle, R., Shang, Z., Storey, J. W. V., Sun, B., Suntzeff, N., Tothill, N. F. H., Travouillon, T., Walker, C. K., Wang, L., Yan, J., Yang, J., York, D., Yuan, X., Zhang, X., Zhang, Z., Zhou, X. & Zhu, Z., Feb 2009, In : Publications of the Astronomical Society of the Pacific. 121, 876, p. 174-184 11 p.

Research output: Contribution to journalArticle

56 Scopus citations
2010

Dome A site testing and future plans

Gong, X., Wang, L., Cui, X., Feng, L., Yuan, X., Ashley, M. C. B., Allen, G., Bonner, C. S., Bradley, S. G., Everett, J. R., Hengst, S., Hu, J., Jiang, Z., Kulesa, C. A., Lawrence, J. S., Li, Y., Luong-Van, D. M., McCaughrean, M. J., Moore, A. M., Pennypacker, C. & 17 others, Qin, W., Riddle, R., Shang, Z., Storey, J. W. V., Sun, B., Suntzeff, N., Tothill, N. F. H., Travouillon, T., Walker, C. K., Yan, J., Yang, H., Yang, J., York, D. G., Zhang, X., Zhang, Z., Zhou, X. & Zhu, Z., 2010, In : EAS Publications Series. 40, p. 65-72 8 p.

Research output: Contribution to journalArticle

9 Scopus citations