524 citations · 1.2k across the 18 of their papers we have counts for
19 papers
The Structure in the Structure Function of Black Hole Light Curves
Daniel C. M. Palumbo, Alejandro Cárdenas-Avendaño, Lena Murchikova
Of the two black holes, M87 and Sgr~A, for which event-horizon-scale imaging is currently achievable, only Sgr~A at our Galactic Center exhibits sub-hour varia…
Stellar-wind Fueled Accretion onto Sagittarius A* in the Presence of a Nuclear Star Cluster
Edward Skrabacz, Lena Murchikova, Sean M. Ressler +2
The Milky Way's Galactic Center hosts the black hole Sagittarius A* (Sgr A*), which provides us with a close-up view into supermassive black hole accretion and feedback. Recent wor…
Modeling the Milky Way Circumnuclear Disk: Rosettes and Rings
Asad Ukani, Lena Murchikova, Mark D. Gorski
The Milky Way Galactic Center hosts a supermassive black hole (SMBH), Sagittarius A* (Sgr A*). The dominant structures in its immediate vicinity are th…
The CO-to-H conversion factor in the Milky Way's central parsec
Mark Gorski, Lena Murchikova
Carbon monoxide (CO) emission is a widely used tracer of molecular hydrogen (H) in the interstellar medium (ISM), owing to its abundance, low excitation energy, and ease of det…
The Discovery of an Active Wind from the Milky Way's Black Hole
Mark D. Gorski, Elena Murchikova
Every large galaxy has a black hole in its center. The interaction between the black hole and its host profoundly shapes galactic evolution and the Universe as a whole. The key fea…
Observability of Isolated Stellar-mass Black Holes
Lena Murchikova, Kailash Sahu
Stellar-mass black holes (BHs) represent the natural end states of massive stars. It is estimated that stellar-mass BHs are present in the Milky Way galaxy, a significant fr…
Detection Prospects of Electromagnetic Signatures from OGLE-2011-BLG-0462
Shigeo S. Kimura, Lena Murchikova, Kailash C. Sahu
Stellar-mass isolated black holes (IsoBHs) wandering in interstellar medium (ISM) are expected to be abundant in our Galaxy. Recently, an IsoBH, OGLE-2011-BLG-0462, was unambiguous…
The Inner 2 pc of Sagittarius A*: Simulations of the Circumnuclear Disk and Multiphase Gas Accretion in the Galactic Center
Siddhant Solanki, Sean M. Ressler, Lena Murchikova +2
We present hydrodynamic simulations of the inner few parsecs of the Milky Way's Galactic Center that, for the first time, combine a realistic treatment of stellar winds and the cir…
Remarkable correspondence of Sagittarius A* submillimeter variability with a stellar-wind-fed accretion flow model
Lena Murchikova, Christopher J. White, Sean M. Ressler
We compare the 230 GHz near-horizon emission from Sagittarius A* to simulations representing three classes of accretion flows. Using the structure function to capture the variabili…
Second Scale Submillimeter Variability of Sagittarius A* during flaring activity of 2019: On the Origin of Bright Near Infrared Flares
Lena Murchikova, Gunther Witzel
In 2019, Sgr A* - the supermassive black hole in the Galactic Center - underwent unprecedented flaring activity in the near infrared (NIR), brightening by up to a factor of 100 com…
S0-2 star, G1- and G2-objects and flaring activity of the Milky Way's Galactic Center black hole in 2019
Lena Murchikova
In 2019, the Galactic center black hole Sgr A* produced an unusually high number of bright near-infrared flares, including the brightest-ever detected flare (Do et al 2019, Gravity…
Reconstructing EUV spectrum of star forming regions from millimeter recombination lines of HI, HeI, and HeII
Lena Murchikova, Eric J. Murphy, Dariusz C. Lis +9
The extreme ultraviolet (EUV) spectra of distant star-forming regions cannot be probed directly using either ground- or space-based telescopes due to the high cross-section for int…
Peas in a Pod? Radius correlations in Kepler multi-planet systems
Lena Murchikova, Scott Tremaine
We address the claim of Weiss et al. (2018) that the radii of adjacent planets in Kepler multi-planet systems are correlated. We explore two simple toy models---in the first the ra…
Evolution of Interstellar Medium, Star Formation, and Accretion at High Redshift
N. Scoville, N. Lee, P. Vanden Bout +20
ALMA observations of the long wavelength dust continuum are used to estimate the interstellar medium (ISM) masses in a sample of 708 galaxies at z = 0.3 to 4.5 in the COSMOS field.…
ALMA Resolves the Nuclear Disks of Arp 220
Nick Scoville, Lena Murchikova, Fabian Walter +20
We present 90 mas (37 pc) resolution ALMA imaging of Arp 220 in the CO (1-0) line and continuum at mm. The internal gas distribution and kinematics of both galactic nuclei…
ISM masses and the star formation law at Z = 1 to 6 // ALMA observations of dust continuum in 145 galaxies in the COSMOS survey field
N. Scoville, K. Sheth, H. Aussel +17
ALMA Cycle 2 observations of the long wavelength dust emission in 145 star-forming galaxies are used to probe the evolution of star-forming ISM. We also develop the physical basis…
ISM Masses and Star Formation at z = 1 to 6 ALMA Observations of Dust Continuum in 180 Galaxies in COSMOS
N. Scoville, K. Sheth, H. Aussel +12
ALMA Cycle 2 observations of the long wavelength dust emission in 180 star-forming (SF) galaxies are used to investigate the evolution of ISM masses at z = 1 to 6.4. The ISM masses…
ALMA Imaging of HCN, CS and dust in Arp 220 and NGC 6240
Nick Scoville, Kartik Sheth, Fabian Walter +19
We report ALMA Band 7 (350 GHz) imaging at 0.4 - 0.6arcsec resolution and Band 9 (696 GHz) at ~0.25arcsec resolution of the luminous IR galaxies Arp 220 and NGC 6240. The long wave…
Submm Recombination Lines in Dust-Obscured Starbursts and AGN
NIck Scoville, Lena Murchikova
We examine the use of submm recombination lines of H, He and He to probe the extreme ultraviolet (EUV) luminosity of starbursts (SB) and AGN. We find that the submm recombinati…