Robert Estalella

Departament de Física Quàntica i Astrofísica

Facultat de Física

Universitat de Barcelona

Martí i Franquès, 1

E08028 Barcelona (Spain)

Phone: +34 934 021 127

FQA

Facultat Física

UB

UB PDI

Research

ISM, SF Group

Emeritus Professor of Astronomy and Astrophysics (retired), University of Barcelona
Stellar Structure and Formation, Master on Astrophysics, Particle Physics and Cosmology, University of Barcelona
Physics of the Insterstellar Medium
Teaching of Astronomy (primary and secondary levels)

Sph_infall: a program to model the intensity of an optically-thin, spherically-symmetric envelope with infall motion.
Thindisk_fit: a program to model a geometrically thin disk with infall or rotation and to fit the model to a spectral data cube.
Envelope_plummer: a program to fit simultaneously the intensity profile and the SED of a spherically symmetric envelope.
HfS: a tool to fit the hyperfine structure of spectral lines, and, for NH3 (1,1) and (2,2) spectra, simultaneous fit of the hyperfine structure of both lines and standard analysis to derive NH3 column density and rotational temperature.
Map: a simple, interactive, menu-driven program to plot and annotate maps. New graphical interface, version 2022
Panel: a simple, interactive, menu-driven program, to plot a stacked array of panels
Astro: a simple program to show, for a given location and time, the apparent coordinates; rising, setting and meridian crossing times; distance, angular size, and phase of the Sun, Moon, planets, bright stars, and Messier objects.
Planisphere: Plot of the naked-eye sky, with stars, Sun, Moon, and planets brighter than a given magnitude,visible at a given epoch and location.
Sundial: Plot of a sundial for any location on a plane with any orientation and inclination.
Fits_tools: A collection of simple tasks of transformation of the geometry and intensity scale of a spectral cube or a 2-D image in a basic FITS file.

Rotational diagram, with Manuel Fernández-López (2022-05)
Mass infall rate for an infalling envelope (2021-02)
Free fall: sphere vs. cylindrical filament (2019-06)
Free fall of a cylindrical filament (2019-04)
Initial mass function of a small cluster (2018-11)
Constants and conversion factors pdf, ods, Fortran 90 module (2018-01)
Luminosity from observed flux density and size (2018-01)
Thermal and non-thermal line widths (2017-08)
Self-gravitating, isothermal cylindrical filament (2017-07)
Radiation pressure (2016-10)
Mass from dust thermal emission (2015-12)
On the Bonnor-Ebert sphere (2015-10)
Standard NH3 (1,1) and (2,2) analysis (2015-05)
Thin disk kinematic model (2014-07)
Hydrogen mass and total mass (2003-08)

Parabolic interpolation (2022-09)
Deconvolution of two-dimensional Gaussians (2022-06)
Nonogram (2022-02)
Errors in the parameters of a fitted Gaussian (2021-07)
Expected value and error of the ratio of two Gaussian random variables (2021-07)
Convergence point of a set of straight lines (2018-12)
Error in the intersection of two straight lines (2018-12)
Finite spectral resolution and first-order moment of a line (2017-12)
Centroid of an isointensity contour (2017-11)
Numerical convolution with a Gaussian of unit area (2017-07)
"Value" at the origin of power-law functions (2017-07)
On the projections of an m-dimensional ellipsoid, with Ferran Sala (2016-02)
Fourier Transform and convolution of Gaussians (2013-01)
Distance to an ellipse (2012-12)
Chi-square fitting (2012-06)
Astrometry of an image (2011-06)
LSQ fit of a straight line (2009-12)
Proper motion estimation (2009-12)
Maximum angular size sensitivity of an interferometer (2008-10)
On the probability of hitting a deer with a car (2003-08)

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