Andrew Friedman's Astronomy Homepage

Improved Constraints on Anisotropic Birefringent Lorentz Invariance and CPT Violation from Broadband Optical Polarimetry of High Redshift Galaxies, Friedman, A.S., Gerasimov, R., Kislat, F., Leon, D., Stevens, W., Tytler, D., and Keating, B.G. 2020, (arXiv:2003.00647 | PDF)

Type Ia Supernovae are Excellent Standard Candles in the Near-Infrared, Avelino, A., Friedman, A.S., Mandel, K.S., Jones, D.O., Challis, P, and Kirshner, R.P. 2019, the Astrophysical Journal, Vol. 887, Number 1, id. 106, 33pp, December 10 2019 (arXiv:1902.03261 | PDF) (DOI)

Constraints on Lorentz Invariance and CPT Violation using Optical Photometry and Polarimetry of Active Galaxies BL Lacertae and S5 B0716+714, Friedman, A.S., Leon, D., Crowley, K.D., Johnson, D., Teply, G., Tytler, D., Keating, B.G., and Cole, G.M. 2019, Physical Review D, Vol. 99, Issue 3, id. 035045 (arXiv:1809.08356 | PDF) (DOI)

Relaxed Bell Inequalities with Arbitrary Measurement Dependence for Each Observer, Friedman, A.S., Guth, A.H., Hall, M.J.W., Kaiser, D.I., and Gallicchio, J. 2019, Physical Review A, Vol. 99, Issue 1, id. 012121 (arXiv:1809.01307 | PDF) (DOI)

Extending Supernova Spectral Templates for Next-Generation Space Telescope Observations, Pierel, J.D.R. + 2018, Publications of the Astronomical Society of the Pacific, Vol. 130, Issue 993, pp. 114504 (arXiv:1808.02534) (DOI)

Cosmic Bell Test Using Random Measurement Settings from High-Redshift Quasars, Rauch, D., Handsteiner, J., Hochrainer, A., Gallicchio, J., Friedman, A.S. + 2018, Physical Review Letters, Vol. 121, Issue 8, id. 080403 (arXiv:1808.05966 | PDF) (DOI) (Supplemental Material) [Editors' Suggestion]

Astronomical Random Numbers for Quantum Foundations Experiments, Leung, C., Brown, A., Nguyen, H., Friedman, A.S., Kaiser, D.I., and Gallicchio, J., 2018, Physical Review A, Vol. 97, Issue 4, id. 042120 (arXiv:1706.02276) (DOI) [Featured in Physics]

Type II Supernova Light Curves and Spectra From the CfA, Hicken, M., Friedman, A.S. + 2017, The Astrophysical Journal Supplement Series, Vol. 233, Issue 1, id. 6, 11 pp. (arXiv:1706.01030) (DOI)

Cosmic Bell Test: Measurement Settings from Milky Way Stars, Handsteiner, J., Friedman, A.S. + 2017, Physical Review Letters, Vol. 118, Issue 6, id. 060401, (arXiv:1611.06985 | PDF) (DOI) (Supplemental Material)

SN 2012cg: Evidence for Interaction Between a Normal Type Ia Supernova and a Non-Degenerate Binary Companion, Marion, G.H. + 2016, The Astrophysical Journal, Vol. 820, Issue 2, id. 92, 16 pp. (arXiv:1507.07261) (DOI)

CFAIR2: Near-Infrared Light Curves of 94 Type Ia Supernovae, Friedman, A.S. + 2015, The Astrophysical Journal Supplement Series, Vol. 220, Issue 1, id. 9, 35 pp. (arXiv:1408.0465) (DOI)

High Density Circumstellar Interaction in the Luminous Type IIn SN 2010jl: The first 1100 days, Fransson, C. + 2014, The Astrophysical Journal, Volume 197, Issue 2, Article id. 118, 40 pp. (arXiv:1312.6617) (DOI)

Multi-color Optical and NIR Light Curves of 64 Stripped-Envelope Core-Collapse Supernovae , Bianco, F. + 2014, The Astrophysical Journal Supplement, Volume 213, Issue 2, Article id. 19, 21 pp. (arXiv:1405.1428) (DOI)

Testing Bell's Inequality with Cosmic Photons: Closing the Setting-Independence Loophole, Gallicchio, J., Friedman, A.S., and Kaiser, D.I. 2014, Physical Review Letters, Vol. 112, Issue 11, id. 110405, 5 pp. (arXiv:1310.3288) (DOI)

Type IIb Supernova SN 2011dh: Spectra and Photometry from the Ultraviolet to the Near-Infrared, Marion, G.H. + 2014, The Astrophysical Journal, Vol. 781, Issue 2, Article id. 69, 18 pp. (arXiv:1303.5482) (DOI)

A Panchromatic View of the Restless SN 2009ip Reveals the Explosive Ejection of a Massive Star Envelope, Margutti, R. + 2014, The Astrophysical Journal, Vol. 780, Issue 1, Article id. 21, 38 pp. (arXiv:1306.0038) (DOI)

The Shared Causal Pasts and Futures of Cosmological Events, Friedman, A.S., Kaiser, D.I., and Gallicchio, J. 2013, Physical Review D, Vol. 88, Issue 4, id. 044038, 18 pp. (arXiv:1305.3943) (DOI)

The Fast and Furious Decay of the Peculiar Type-I Supernova 2005ek, Drout, M. + 2013, The Astrophysical Journal, Vol. 774, Issue 1, article id. 58, 18 pp. (arXiv:1306.2337) (DOI)

PS1-12sk is a Peculiar Supernova From a He-Rich Progenitor System in a Brightest Cluster Galaxy Environment, Sanders, N.E. + 2013, The Astrophysical Journal, Vol. 769, Issue 1, 39, 15 pp. (arXiv:1303.1818) (DOI)

Infrared Light Curves of Type Ia Supernovae, Friedman, Andrew S. 2012, PhD Thesis, Harvard University, ProQuest Dissertations and Theses, Publication Number: AAT 3513964; ISBN: 9781267446190; Source: Dissertation Abstracts International, Volume: 73-11(E), Section: B.; 272 pp. Advisor: Robert P. Kirshner, (NASA/ADS) (ProQuest)

CfA4: Light Curves for 94 Type Ia Supernovae, Hicken, M. + 2012, The Astrophysical Journal Supplement, Vol. 200, Issue 2, article id. 12, 15 pp. (arXiv:1205.4493) (DOI)

Type Ia Supernova Light Curve Inference: Hierarchical Bayesian Analysis in the Near Infrared, Mandel, K.S., Wood-Vasey, W.M., Friedman, A.S., Kirshner, R.P. 2009, The Astrophysical Journal, Vol. 704, Issue 1, pp. 629-651 (arXiv:0908.0536) (DOI)

From Shock Breakout to Peak and Beyond: Extensive Panchromatic Observations of the Type Ib Supernova 2008D Associated with Swift X-ray Transient 080109, Modjaz, M. + 2009, The Astrophysical Journal, Vol. 702, Issue 1, pp. 226-248 (arXiv:0805.2201) (DOI)

SN 2008ha: An Extremely Low Luminosity and Exceptionally Low Energy Supernova, Foley, R.J. + 2009, The Astronomical Journal, Vol. 138, Issue 2, pp. 376-391 (arXiv:0902.2794) (DOI)

The Golden Standard Type Ia Supernova 2005cf: Observations from the Ultraviolet to the Near-Infrared Wavebands, Wang, X. + 2009, The Astrophysical Journal, Vol. 697, Issue 1, pp. 380-408 (arXiv:0811.1205) (DOI)

Type Ia Supernovae are Good Standard Candles in the Near Infrared: Evidence from PAIRITEL, Wood-Vasey, W.M., Friedman, A.S. + 2008, The Astrophysical Journal, Vol. 689, Issue 1, pp. 377-390 (arXiv:0711.2068) (DOI)

Present and Future Prospects for GRB Standard Candles, Friedman, A.S. & Bloom, J.S. 2005, Il Nuovo Cimento C, Vol. 028, Issue 04-05, pp. 669-672 (astro-ph/0502559) (DOI)

Toward a More Standardized Candle Using GRB Energetics and Spectra, Friedman, A.S. & Bloom, J.S. 2005, The Astrophysical Journal, Vol. 627, Issue 1, pp. 1-25 (astro-ph/0408413) (DOI)

Conference Proceedings

Standard-Model Extension Constraints on Lorentz and CPT Violation From Optical Polarimetry of Active Galactic Nuclei, Friedman, A.S., Leon, D., Gerasimov, R., Crowley, K.D., Broudy, I. Melkani, Y., Stephens, W., Johnson, D., Teply, G., Tytler, D., Keating, B.G., and Cole, G.M. 2019, Proceedings of the Eighth Meeting on CPT and Lorentz Symmetry (CPT'19), Indiana University, Bloomington, May 12-16, 2019, ed. Ralf Lehnert, World Scientific, Apr 2020, pp. 126-129 (arXiv:1906.07301 | PDF) Article: (DOI) Proceedings: (DOI)

The Lick Observatory Supernova Search, Li, W.D., Filippenko, A.V., Treffers, R.R., Friedman, A.S., Halderson, E., Johnson, R.A., King, J.Y., Modjaz, M., Papenkova, M., Sato, Y., Shefler, T., 2000, American Institute of Physics Conference Proceedings, 522, pp. 103-106, (astro-ph/9912336) (DOI)

Popular Science Writing

11. Make the Cosmic Perspective Your Next Coping Mechanism, Friedman, A.S., Nautilus, Facts So Romantic: On Ideas, Nov 7 2017 [PDF] [Screenshot]

10. Are the Quantum World and the Real World the Same Thing?, Friedman, A.S., NOVA, The Nature of Reality, PBS, WGBH Boston, May 7, 2015 [PDF]

9. Ask Astro: Could quantum entanglement be a result of the big bang?, Friedman, A.S., Astronomy Magazine, Vol. 43, Issue 5, May 2015, pg. 44-45 [PDF]

8. Can the Cosmos Test Quantum Entanglement?, Friedman, A.S., Astronomy Magazine, Vol. 42, Issue 10, October 2014, pg. 28-33 [PDF]

7. Web Extra: Another Cosmic Thought Experiment, Friedman, A.S., Astronomy Magazine, Vol. 42, Issue 10, October 2014

6. Heart of a Star, Revealed, Friedman, A.S., Rune: The MIT Journal of Arts and Letters, Issue 35, pg. 21-22, [PDF] (Based on the MIT Art of Astrophysics Competition, Heart of a Star, Revealed [PDF])

5. The Universe Made Me Do It? Testing “Free Will” With Distant Quasars, Friedman, A.S., NOVA, The Nature of Reality, PBS, WGBH Boston, March 19, 2014 [PDF] [2 Column PDF]

4. Using GRBs For Cosmology, Friedman, A.S. 2006, Sky & Telescope, Volume 112, No. 2, pg. 35 (NASA/ADS) [PDF]

3. The Fundamental Distinction Between Brains and Turing Machines, Friedman, A.S., Berkeley Scientific Journal, Vol. 6, Issue 1, Spring 2002, p. 28-33 [PDF]

2. Fundamental Constants of Physics: The Genes of the Universe, Friedman, A.S., Berkeley Scientific Journal, Vol. 5, Issue 2, Fall 2001, p. 100-104 [PDF]

1. The Fabric of Reality, Friedman, A.S., Berkeley Scientific Journal, Vol. 5, Issue 1. Spring 2001, p. 28-30 [PDF]

Conference Abstracts

13. Near-infrared SN Ia Cosmology , Avelino, A.; Kirshner, R.; Mandel, K.; Challis, P.; Friedman, A.S.; RAISIN Team, 2018, American Astronomical Society, AAS Meeting #231, id.209.03

12. Near-infrared absolute magnitudes of Type Ia Supernovae, Avelino, A.; Friedman, A.S.; Mandel, K.; Kirshner, R.; Challis, P. 2017; American Astronomical Society, AAS Meeting #229, id.410.02

11. Testing Quantum Mechanics and Bell's Inequality with Astronomical Observations, Friedman, A.S.; Kaiser, D.I.; Gallicchio, J. 2016; Team1: University of Vienna, Institute for Quantum Optics and Quantum Information; Team2: UC San Diego Cosmology Group; Team3: NASA/JPL/Caltech, American Astronomical Society, AAS Meeting #228, id.403.05

10. Testing Quantum Mechanics and Bell's Inequality with Astronomical Observations, Friedman, A.S.; Gallicchio, J.; Kaiser, D.I.; Guth, A.H. 2015, American Astronomical Society, AAS Meeting #225, id.255.13

9. Testing Quantum Mechanics and Bell's Inequality with Cosmological Observations of Quasars, Friedman, A.S.; Gallicchio, J.; Kaiser, D.I.; Guth, A. 2014, American Astronomical Society, AAS Meeting #224, id.304.02

8. Testing Quantum Mechanics with Observations of Causally Disconnected Cosmological Events, Friedman, A.S.; Kaiser, D.I.; Gallicchio, J.; Guth, A.H. 2014, American Astronomical Society, AAS Meeting #223, id.127.01

7. Type Ia Supernova Light Curve Inference: Hierarchical Models for Nearby SN Ia in the Optical and Near Infrared, Mandel, K.; Kirshner, R.P.; Narayan, G.; Wood-Vasey, W.M.; Friedman, A.S.; Hicken, M. 2010, American Astronomical Society, AAS Meeting #215, id.343.05; Bulletin of the American Astronomical Society, Vol. 42, p.449

6. Infrared Light Curves of Type Ia Supernovae, Friedman, A.S. + 2010 American Astronomical Society, AAS Meeting #215, id.343.04; Bulletin of the American Astronomical Society, Vol. 42, p.449

5. Disentangling Intrinsic Color Variation and Dust Extinction of Type Ia Supernovae With Near-Infrared, Optical, and Ultraviolet Photometry, Friedman, A.S. + 2009, American Astronomical Society, AAS Meeting #213, id.438.06; Bulletin of the American Astronomical Society, Vol. 41, p.311

4. The Absolute Brightness of Type Ia Supernovae in the Near-Infrared from PAIRITEL: Improved Reddening Estimates and Distances, Friedman, A.S. + 2007 American Astronomical Society, AAS Meeting #211, id.91.17; Bulletin of the American Astronomical Society, Vol. 39, p.886

3. First Two Years: Infrared Light Curves of Type Ia Supernovae with the Peters Automated Infrared Imaging Telescope (PAIRITEL), Friedman, A.S. + 2006, 2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, id.90.06; Bulletin of the American Astronomical Society, Vol. 38, p.1026

2. Infrared Light Curves of Nearby Supernovae with the Peters Automated Infrared Imaging Telescope (PAIRITEL), Friedman, A.S. + 2005, American Astronomical Society Meeting 207, id.171.05; Bulletin of the American Astronomical Society, Vol. 37, p.1432

1. The Present and Future of GRB Cosmography, Friedman, A.S., and Bloom, J.S 2004, American Astronomical Society Meeting 205, id.159.07; Bulletin of the American Astronomical Society, Vol. 36, p.1611

Astronomical Circulars

15. Updated Physical Parameters of SN 2012cg, Marion, G.H. + 2012, The Astronomer's Telegram, ATEL #4215 (6/2012) (NASA/ADS)

14. Early Optical and NIR Photometry and Optical Spectroscopy of SN 2012cg, Marion, G.H. + 2012, The Astronomer's Telegram, ATEL #4159 (6/2012) (NASA/ADS)

13. Helium Detection in IRTF Spectra of SN 2011dh, Marion, G.H. + 2011, The Astronomer's Telegram, ATEL #3435 (6/2011) (NASA/ADS)

12. Supernova 2008fj in UGC 10759, Challis, P. + 2008, Central Bureau Electronic Telegrams, CEBT 1495, 1 (9/2008) (NASA/ADS)

11. XRB 080109/SN 2008D:PAIRITEL NIR observations and t_0 from Swift., Modjaz, M. + 2008, GRB Coordinates Network Circular Service, GCN 7175, 1 (2008) (NASA/ADS)

10. PAIRITEL Monitoring of SN 2007sr, Bloom, J.S. + 2007, The Astronomer's Telegram, ATEL #1343 (12/2007) (NASA/ADS)

9. GRB 061201: magellan redshift of nearby Abell cluster., Blondin, S. + 2006, GRB Coordinates Network Circular Service, GCB 5944, 1 (2006) (NASA/ADS)

8. Supernova 2001ae in IC 4229, Friedman, A.S., Li, W.D., Schwartz, M. 2001, International Astronomical Union Circulars, IAUC 7597, 1 (2001) (NASA/ADS)

7. Supernova 2001L in MCG -01-30-11, Friedman, A.S., Li, W.D., Chornock, R. 2001, International Astronomical Union Circulars, IAUC 7566, 1 (2001) (NASA/ADS)

6. Supernova 2000fa in UGC 3770, Friedman, A.S., Li, W.D., Schwartz, M. 2000, International Astronomical Union Circulars, IAUC 7533, 2 (2000) (NASA/ADS)

5. Supernova 1999gb in NGC 2532, Friedman, A.S., Li, W.D., Puckett, T. 1999, International Astronomical Union Circulars, IAUC 7316, 2 (1999) (NASA/ADS)

4. Supernova 1999ej in NGC 495, Friedman, A.S., King, J.Y., Li, W.D., Lick Observatory Supernova Search 1999, International Astronomical Union Circulars, IAUC 7286, 1 (1999) (NASA/ADS)

3. Supernova 1999bx in UGC 11391, Friedman, A.S., Li, W.D. 1999, International Astronomical Union Circulars, IAUC 7154, 1 (1999) (NASA/ADS)

2. Comet 1999 E1, Li, W.D., Modjaz, M., King, J. Y., Papenkova, M., Johnson, R. A., Friedman, A.S., Treffers, R. R., Filippenko, A. V. 1999, International Astronomical Union Circulars, IAUC 7126, 1 (1999) (NASA/ADS)

1. Supernova 1999ac in NGC 6063, Modjaz, M., King, J. Y., Papenkova, M., Friedman, A.S., Johnson, R. A., Li, W. D., Treffers, R. R., Filippenko, A. V. 1999, International Astronomical Union Circulars, IAUC 7114, 1 (1999) (NASA/ADS)


University of California, San Diego	UCSD Center for Astrophysics & Space Sciences	Massachusetts Institute of Technology	MIT Center for Theoretical Physics	Institute for Quantum Optics and Quantum Information, Vienna	Harvard University Astronomy	Harvard-Smithsonian Center for Astrophysics	UC Berkeley Astronomy	National Science Foundation	National Aernautics & Space Administration