
76 University Drive
Hazleton PA 18202
Publications
Universal Acceleration and Fuzzy Dark Matter, International Journal of Modern Physics D - July, 2024
Collaborators: Joshua Ehrlich, Co-Author; Djordje Minic, Co-Author; Tatsu Takeuchi, Co-Author
On Quantum Gravity and Quantum Gravity Phenomenology, Proceedings of the Sixteenth Marcel Grossmann Meeting - January, 2023
Collaborators: Djordje Minic, Corresponding Author; Tatsu Takeuchi, Co-Author
Quantum Gravity and Phenomenology: Dark Matter, Dark Energy, Vacuum Selection, Emergent Spacetime, and Wormholes, Snowmass 21
Collaborators: Per Berglund, Contributor to Edited Volume; De-Chang Dai, Contributor to Edited Volume; Yang-Hui He, Contributor to Edited Volume; Tristan Hubsch, Corresponding Author; Vishnu Jejjela, Contributor to Edited Volume; Michael Kavic, Contributor to Edited Volume; Djordje Minic, Contributor to Edited Volume; Samuel Powers, Student Author; John Simonetti, Contributor to Edited Volume; Dejan Stojkovic, Contributor to Edited Volume; Tatsu Takeuchi, Contributor to Edited Volume
Dark matter, dark energy and fundamental acceleration, International Journal of Modern Physics D - December, 2020
Collaborators: Djordje Minic; Tatsu Takeuchi
Multiwavelength Campaign on Mrk 509 XVI. Continued HST/COS Monitoring of the Far-Ultraviolet Spectrum, Astronomy & Astrophysics - March, 2019
Collaborators: G Kriss, Author; N Arav, Co-Author; J Ely; J Kaastra; S Bianchi; M Cappi; E Costantini; J Ebrero; M Mehdipour; S Paltani; P Petrucci; G Ponti
Modified Dark Matter in Galaxies and Galaxy Clusters, The Bulgarian Journal of Physics - 2018
Collaborators: Duncan Farrah; Djordje Minic; Y.J. Ng; Tatsu Takeuchi
Modified Dark Matter: Relating Dark Energy, Dark Matter, and Baryonic Matter, International Journal of Modern Physics D - January, 2018
Collaborators: Duncan Farrah, Co-Author; Djordje Minic, Co-Author; Y. Ng, Co-Author; Tatsu Takeuchi, Co-Author
Testing Modified Dark Matter with galaxy clusters: Does dark matter know about the cosmological constant?, International Journal of Modern Physics A - June 30, 2017
Collaborators: Duncan Farrah; Chiu Man Ho; DJordje Minic, Co-Author; Y.J. Ng, Co-Author; Tatsu Takeuchi, Co-Author
Modified Dark Matter, Proceedings of the Fourteenth Marcel Grossman Meeting on General Relativity - January, 2016
Collaborators: Y.J. Ng, Author; Duncan Farrah; Djordje Minic; Tatsu Takeuchi; Chiu Man Ho
Testing MONDian Dark Matter with Galactic Rotation Curves, American Astronomical Society, AAS Meeting #225, id.255.07 - January, 2015
Collaborators: Duncan Farrah, Author; Chiu Man Ho; Djordje Minic; Jack Ng; Tatsu Takeuchi
Testing MONDian Dark Matter With Galactic Rotation Curves, Astrophysical Journal - September, 2014
Collaborators: Duncan Farrah, Author; Chiu Ho, Author; Djordje Minic, Author; Y. Ng, Author; Tatsu Takeuchi, Author
Ultraviolet characteristics, outflow properties and variability of active galactic nucleus Markarian 1513, Monthly Notices of the Royal Astronomical Society - March, 2014
Collaborators: Barton Tofany, Author; Lisa Winter, Co-Author; Benoit Borguet, Co-Author; Charles Danforth; James Green; Nahum Arav
Quasar Outflows and AGN Feedback in the Extreme UV: HST/COS Observations of QSO HE0238-1904, American Astronomical Society, AAS Meeting #223, id.251.21 - January, 2014
Collaborators: N. Arav, Author; B. Borguet, Co-Author; C. Chamberlain, Co-Author; C. Danforth, Co-Author
Quasar outflows and AGN feedback in the extreme UV: HST/COS observations of HE 0238-1904, Monthly Notices of the Royal Astronomical Society - December, 2013
Collaborators: Nahum Arav, Author; Benoit Borguet, Co-Author; Carter Chamberlain, Co-Author; Charles Danforth, Co-Author
Simultaneous XMM-Newton and HST-COS observation of 1H0419-577. The absorbing and emitting ionized gas, Astronomy & Astrophysics - August, 2013
Collaborators: L. Di Gesu, Author; E. Costantini, Co-Author; N. Arav; B. Borguet, Co-Author; R.G. Detmers, Co-Author; J. Ebrero, Co-Author; J.S. Kaastra; E. Piconcelli, Co-Author; F. Verbunt, Co-Author
Major Contributor To AGN Feedback: VLT X-Shooter Observations Of S IV BALQSO Outflows, Astrophysical Journal - January, 2013
Collaborators: Benoit Borguet, Author; Nahum Arav, Co-Author; Carter Chamberlain, Student Author; Chris Benn
BAL Phosphorus Abundance and Evidence For Immense Ionic Column Densities in QUASAR Outflows: VLT/X-Shooter Observations Of QUASAR SDSS J1512+1119, Astrophysical Journal - October, 2012
Collaborators: Benoit Borguet, Author; Nahum Arav, Co-Author; Chris Benn; Carter Chamberlain
Characterizing the UV and X-ray Outflow in Mrk 509, AGN Winds in Charleston, Astronomical Society of the Pacific Conference Series - August, 2012
Collaborators: G.A. Kriss, Author; N. Arav; J.S. Kaastra; J. Ebrero; C. Pinto; B. Borguet; E. Costantini; K.C. Steenbrugge; R.G. Detmers; E. Behar; S. Bianchi; A.J. Blustin; G. Branduardi-Raymont; M. Cappi; M. Mehdipour; P. Petrucci; G. Ponti
Multiwavelength Campaign on Mrk 509 IX. Lower Limit on the Distance of the Absorber from HST COS and STIS Spectroscopy, AGN Winds in Charleston, Astronomical Society of the Pacific Conference Series - August, 2012
Collaborators: Nahum Arav; Benoit Borguet; Gerard Kriss
Tomography of the UV Outflow in IRAS-F22456-5125 using High S/N HST/COS Observations, AGN Winds in Charleston, Astronomical Society of the Pacific Conference Series - August, 2012
Collaborators: Benoit Borguet, Author; Nahum Arav; Jay Dunn
Multiwavelength campaign on Mrk 509. X. Lower limit on the distance of the absorber from HST COS and STIS spectroscopy, Astronomy & Astrophysics - August, 2012
Collaborators: N. Arav, Co-Author; B. Borguet; G.A. Kriss, Co-Author; J.S. Kaastra; E. Behar; S. Bianchi; M. Cappi; E. Costantini; R.G. Detmers; J. Ebrero; M. Mehdipour; S. Paltani; P.O. Petrucci; C. Pinto; G. Ponti; K.C. Steenbrugge; C.P. de Vries
A 10 kpc Scale Seyfert Galaxy Outflow: HST/COS Observations Of IRAS F22456-5125, Astrophysical Journal - June, 2012
Collaborators: Benoit Borguet, Author; Nahum Arav, Co-Author; Jay Dunn, Co-Author; Gerard Kriss, Co-Author
BAL Outflow Contribution To AGN Feedback: Frequency Of S IV Outflows In the SDSS, Astrophysical Journal - May, 2012
Collaborators: Jay Dunn, Author; Nahum Arav, Co-Author; Kentaro Aoki, Co-Author; Ashlee Wilkins, Student Author; Courtney Laughlin, Student Author; Manuel Bautista, Co-Author
Determination Of The Kinetic Luminosity Of The High Ionization UV Outflow In SDSS J1512+1119 Using High S/N VLT/X-Shooter Spectrum, American Astronomical Society, AAS Meeting #219, id.435.12 - January, 2012
Collaborators: Benoit Borguet, Author; N. Arav, Co-Author; C. Chamberlain, Co-Author
Multiwavelength Campaign on Mrk 509 IX: Limits on the Distance of the Absorber from HST COS and STIS Spectroscopy, American Astronomical Society, AAS Meeting #219, id.434.04 - January, 2012
Collaborators: N. Arav, Co-Author; B. Borguet, Co-Author; G.A. Kriss
Multiwavelength campaign on Mrk 509. VI. HST/COS observations of the far-ultraviolet spectrum, Astronomy & Astrophysics - October, 2011
Collaborators: G.A. Kriss, Author; N. Arav, Co-Author; J.S. Kaastra; J. Ebrero; C. Pinto; B. Borguet, Co-Author; E. Costantini, Co-Author; K.C. Steenbrugge, Co-Author; R.G. Detmers, Co-Author; E. Behar; S. Bianchi; A.J. Blustin; G. Branduardi-Raymont; M. Cappi; M. Mehdipour; P. Petrucci; G. Ponti
Galactic-Scale Absorption Outflow In the Low-Luminosity QUASAR IRAS F04250-5718: Hubble Space Telescope/Cosmic Origins Spectrograph Observations, Astrophysical Journal - September, 2011
Collaborators: Benoit Borguet, Co-Author; Nahum Arav, Co-Author; Jay Dunn, Co-Author; Steve Penton; Gerard Kriss; Kirk Korista; Elisa Costantini; Katrien Steenbrugge; J. Gonzalez-Serrano; Kentaro Aoki; Manuel Bautista; Ehud Behar; Chris Benn; D. Crenshaw; John Everett; Jack Gabel; Jelle Kaastra; Maxwell Moe, Author; Jennifer Scott
Outflow in Overlooked Luminous Quasar: Subaru Observations of AKARI J1757+5907, Publications Of the Astronomical Society Of Japan - March, 2011
Collaborators: Kentaro Aoki, Author; Shinki Oyabu, Co-Author; Jay Dunn, Co-Author; Nahum Arav, Co-Author; Kirk Korista, Co-Author; Hideo Matsuhara, Co-Author; Yoshiki Toba, Co-Author
The Galactic Scale UV Outflow Discovered In High S/N HST COS Observations Of IRAS F04250-5718, American Astronomical Society, AAS Meeting #217, id.432.03 - January, 2011
Collaborators: B. Borguet; N. Arav, Co-Author; S. Penton; J. Dunn
Tomography Of The UV Outflow In IRAS F22456-5125 Using High S/N HST COS Observations, American Astronomical Society, AAS Meeting #217, id.432.02 - January, 2011
Collaborators: Benoit Borguet, Author; N. Arav; J. Dunn
The QUASAR Outflow Contribution To AGN Feedback: VLT Measurements Of SDSS J0318-0600, The Astrophysical Journal - February, 2010
Collaborators: Jay Dunn, Author; Manuel Bautista, Co-Author; Nahum Arav, Co-Author; Max Moe, Co-Author; Kirk Korista, Co-Author; Elisa Costantini, Author; Chris Benn; Sara Ellison, Co-Author
The Frequency of S IV Broad Absorption Line Quasars in the Sloan Digital Sky Survey, American Astronomical Society, AAS Meeting #215, id.411.33 - January, 2010
Collaborators: Jay Dunn, Author; N. Arav; M.A. Bautista; A. Wilkins, Co-Author
Distance determination to Broad Line Absorbers in AGN, American Astronomical Society, AAS Meeting #213 - January, 2009
Collaborators: Manuel Bautista, Author; N. Arav; J. Dunn, Co-Author; K.T. Korista; M. Moe; C. Benn; G. Ignacio
The Multiple Component Absorption System in QSO 0318-0600: The Slow, The Fast and The Strong, American Astronomical Society, AAS Meeting #213 - January, 2009
Collaborators: Jay Dunn; M. Bautista, Co-Author; M. Moe, Co-Author; N. Arav; K. Korista
Cylindrical Waves in Expanding Universes: Models for Compact Sources, Physical Review D - April, 2007
Collaborator: Robert Gowdy, Author
Structure and stability of Co-n(pyridine)(m)(-) clusters: Absence of metal inserted structures, Journal Of Chemical Physics - February, 2006
Collaborators: A Kandalam, Co-Author; S Khanna, Co-Author; X Li, Co-Author; A Grubisic, Co-Author; I Khanna, Co-Author; K Bowen, Co-Author
Electrostatic operation and curvature modeling for a MEMS flexible film actuator, Smart Structures and Materials 2004: Modeling, Signal Processing, and Control - July, 2004
Collaborators: J Ernstberger, Author; K Ghosh, Co-Author; J Malaugh, Co-Author; D Nfodjo, Co-Author; W Samyono, Co-Author; X Xu, Co-Author; D Dausch, Co-Author; S Goodwin, Co-Author; RC Smith, Author
Education
Ph D, Physics, Virginia Tech
MS, Pure Mathematics, Virginia Commonwealth University
MS, Physics, Virginia Commonwealth University
Papers and Presentations
December 13, 2023 - December 20, 2023
Oral Presentations
Rotation Curves of Galaxies at High Redshifts
Miami 2023: A topical conference on elementary particles, astrophysics, and cosmology
Ft. Lauderdale
Rotation curves of galaxies provide the most reliable methods for extracting
information about dark matter halos from observations. Dark matter simulations
provide predictions about the evolution of dark matter halos over time. We will
discuss rotation curve analysis of a large sample (~100) of high-redshift galaxies.
We will also discuss how these results compare with the Magneticum simulations
using simulated galaxies at different redshifts.
December 14, 2022 - December 20, 2022
Oral Presentations
Acceleration Scales in Galaxies and Galaxy Clusters in the Lambda-CDM Paradigm
Miami 2022: A topical conference on elementary particles, astrophysics, and cosmology
Ft. Lauderdale, FL, USA
The acceleration scale $\sim 10^{-10} \textrm{m/s}^2$ observed in spiral galaxies provides a clue about galaxy formation. Whether such a scale exists in galaxy clusters has yet to be firmly established. However, observations hint at an acceleration scale in galaxy clusters similar to that of galaxies. In this talk, we discuss these observations and the origin of the observed acceleration scales in the context of the standard cosmological model.
December 15, 2021 - December 22, 2021
Oral Presentations
Structure Formation in the Universe: Analogy with Turbulence
Miami 2021: A topical conference on elementary particles, astrophysics, and cosmology
Ft. Lauderdale, FL, USA
The baryonic Tully-Fisher and baryonic Faber-Jackson relations imply an acceleration scale in structures of very different size, morphology, and evolutionary history. Observationally, the acceleration scale is remarkably similar on scales of globular clusters to clusters of galaxies. In this talk, we discuss the acceleration scales in galaxy clusters, which has not yet been well-established, and implications for structure formation, including an analogy with Kolmogorov scaling in turbulence to provide insights into structure formation.
December 10, 2020 - December 21, 2020
Oral Presentations
A Fundamental Acceleration Scale in Galaxy Clusters
Miami 2020: A topical conference on elementary particles, astrophysics, and cosmology
Virtual
An acceleration scale $\sim10^{-10}\mathrm{m/s^2}$ is implicit in the baryonic Faber-Jackson (BFJ) and baryonic Tully-Fisher (BTF) relations, independently of theoretical preference or bias. We show that the existence of this scale in the BFJ relation is most apparent when data from pressure supported systems of vastly different scales including globular clusters, elliptical galaxies, and galaxy clusters are analyzed together. This suggests the relevance of the acceleration scale $10^{-10}\mathrm{m/s^2}$ to structure formation processes at many different length scales and could be pointing to a heretofore unknown property of dark matter.
December 12, 2019 - December 18, 2019
Oral Presentations
Modified Dark Matter
Miami 2019: A topical conference on elementary particles, astrophysics, and cosmology
Ft. Lauderdale FL
An acceleration scale common to most galaxies was discovered in the early nineteen-eighties. Why this scale should exist is an open question. Modified Dark Matter is a model that accounts for the acceleration scale in galaxies and galaxy clusters.
June 25, 2019
Oral Presentations
Modified Dark Matter
IGC@25 Multimessenger Universe
January 7, 2019 - January 13, 2019
Oral Presentations
Universal Acceleration Scale in Galaxy Clusters
BASIC 2019
Long Island, Bahamas
December 13, 2018 - December 19, 2018
Oral Presentations
Universal Acceleration Scale in Galaxy Clusters
Miami 2018: A topical conference on elementary particles, astrophysics, and cosmology
Ft. Lauderdale, FL
September 28, 2018
Oral Presentations
Modified Dark Matter: Relating Dark Energy, Dark Matter, and Baryonic Matter
Colloquium at Virginia Commonwealth University
VCU, Richmond, VA
Modified dark matter (MDM) is a phenomenological model of dark matter, inspired by gravitational thermodynamics. For an accelerating Universe with positive cosmological constant ($\Lambda$), such phenomenological considerations lead to the emergence of a critical acceleration parameter related to $\Lambda$. Such a critical acceleration is an effective phenomenological manifestation of MDM, and is found in tight correlations between dark matter and baryonic matter in galaxy rotation curves, the so-called Mass Discrepancy Acceleration Relation (MDAR). The resulting MDM mass profiles are consistent with observational data at both the galactic and cluster scales.
April 26, 2018
Oral Presentations
The Dark Side of the Universe
Mylar Giri Memorial Lecture
Penn State, Hazleton
December 13, 2017 - December 19, 2017
Oral Presentations
Modified Dark Matter: Relating Dark Energy, Dark Matter, and Baryonic Matter
Miami 2017: A topical conference on elementary particles, astrophysics, and cosmology
Ft. Lauderdale, FL
November 27, 2017
Oral Presentations
Modified Dark Matter: Relating Dark Energy, Dark Matter, and Baryonic Matter
Colloquium
Chapel Hill, NC
October 23, 2017
Seminars
Modified Dark Matter: Relating Dark Energy, Dark Matter, and Baryonic Matter
Astronomical Sciences Seminar
Virginia Tech
Modied dark matter (MDM) is a phenomenological model of dark matter, inspired by gravitational thermodynamics. For an accelerating Universe with positive cosmo- logical constant ($\Lambda$), such phenomenological considerations lead to the emergence of a critical acceleration parameter related to $\Lambda$. Such a critical acceleration is an effective phenomenological manifestation of MDM, and it is found in correlations between dark matter and baryonic matter in galaxy rotation curves. The resulting MDM mass proles, which are sensitive to $\Lambda$, are consistent with observational data at both the galactic and cluster scales. In particular, the same critical acceleration appears both in the galactic and cluster data ts based on MDM. Today, we will discuss the ongoing investigation of MDM with a focus on galaxy clusters.
March 11, 2017 - March 19, 2017
Oral Presentations
Modified Dark Matter: Does Dark Matter Know About the Cosmological Constant?
BASIC 2017
Long Island, Bahamas
December 14, 2016 - December 20, 2016
Oral Presentations
Modified Dark Matter: Does Dark Matter Know About the Cosmological Constant?
Miami 2016: A topical conference on elementary particles, astrophysics, and cosmology
Fort Lauderdale, FL
December 16, 2015
Oral Presentations
Modified Dark Matter in Galaxy Clusters
Miami 2015: A topical conference on elementary particles, astrophysics, and cosmology
Fort Lauderdale, FL
October 7, 2015
Oral Presentations
The Dark Side of the Universe
Emory & Henry College Lyceum
Emory & Henry College
December 17, 2014 - December 23, 2014
Oral Presentations
Mondian Dark Matter in Clusters
Miami 2014: A topical conference on elementary particles, astrophysics, and cosmology
Fort Lauderdale, FL
October 30, 2014
Seminars
Astronomical Tests of Mondian Dark Matter
Bucknell Physics & Astronomy Seminar
Bucknell University
September 11, 2014
Oral Presentations
Is God a Mathematician?
Emory & Henry College Lyceum
Emory & Henry College
December 16, 2013
Oral Presentations
Testing Mondian Dark Matter With Galactic Rotation Curves
Miami 2013: A topical conference on elementary particles, astrophysics, and cosmology
Fort Lauderdale, FL