Ruprecht-Karls-Universität Heidelberg

Prof. Dr. Björn Malte Malte Schäfer

Astronomisches Rechen-Institut



Office
Philosophenweg 12, Room 212

Postal Address
Zentrum für Astronomie der Universität Heidelberg
Astronomisches Rechen-Institut
Philosophenweg 12
69120 Heidelberg






Research interests
cosmology, cosmostatistics, gravity on large scales, dark energy, structure formation, relativity



69.
2/2024
Kunkel, Alexander; Chiueh, Tzihong; Schäfer, Björn Malte
A weak lensing perspective on non-linear structure formation with fuzzy dark matter
MNRAS 527, 10538(2024)

68.
1/2024
Kuntz, Rebecca Maria; Herzog, Maximilian Philipp; von Campe, Heinrich; Röver, Lennart; Schäfer, Björn Malte
Partition function approach to non-Gaussian likelihoods: partitions for the inference of functions and the Fisher-functional
MNRAS 527, 8443(2024)

67.
11/2023
Röver, Lennart; von Campe, Heinrich; Herzog, Maximilian Philipp; Kuntz, Rebecca Maria; Schäfer, Björn Malte
Partition function approach to non-Gaussian likelihoods: physically motivated convergence criteria for Markov chains
MNRAS 526, 473(2023)

66.
8/2023
Röver, Lennart; Bartels, Lea Carlotta; Schäfer, Björn Malte
Partition function approach to non-Gaussian likelihoods: formalism and expansions for weakly non-Gaussian cosmological inference
MNRAS 523, 2027(2023)

65.
3/2023
Sipp, Marvin; Schäfer, Björn Malte
Scalar-induced gravitational waves in a Λ CDM cosmology
PhRvD 107, f3538(2023)

64.
3/2023
Dome, Tibor; Fialkov, Anastasia et al. (inc. Schäfer, Björn Malte)
On the cosmic web elongation in fuzzy dark matter cosmologies: Effects on density profiles, shapes, and alignments of haloes
MNRAS 519, 4183(2023)

63.
2/2023
Giesel, Eileen Sophie; Ghosh, Basundhara; Schäfer, Björn Malte
Etherington duality breaking: gravitational lensing in non-metric space-times versus intrinsic alignments
MNRAS 518, 5490(2023)

62.
8/2022
Zjupa, Jolanta; Schäfer, Björn Malte et al.
Intrinsic alignments in IllustrisTNG and their implications for weak lensing: Tidal shearing and tidal torquing mechanisms put to the test
MNRAS 514, 2049(2022)

61.
6/2022
Lozano Torres, Jose Agustin; Schäfer, Björn Malte
Three-dimensional weak gravitational lensing of the 21-cm radiation background
MNRAS 512, 5135(2022)

60.
3/2022
Reischke, Robert; Bosca, Victor; Tugendhat, Tim; Schäfer, Björn Malte
Testing modified (Horndeski) gravity by combining intrinsic galaxy alignments with cosmic shear
MNRAS 510, 4456(2022)

59.
2/2022
Giesel, Eileen Sophie; Ghosh, Basundhara; Schäfer, Björn Malte
Intrinsic and extrinsic gravitational flexions
MNRAS 510, 2773(2022)

58.
8/2021
Ghosh, Basundhara; Durrer, Ruth; Schäfer, Björn Malte
Intrinsic and extrinsic correlations of galaxy shapes and sizes in weak lensing data
MNRAS 505, 2594(2021)

57.
5/2021
Pinho, Ana Marta; Reischke, Robert; Teich, Marie; Schäfer, Björn Malte
Information entropy in cosmological inference problems
MNRAS 503, 1187(2021)

56.
2/2021
Sipp, Marvin; Schäfer, Björn Malte et al.
Optimizing tomography for weak gravitational lensing surveys
MNRAS 501, 683(2021)

55.
1/2021
Giesel, Eileen; Reischke, Robert; Schäfer, Björn Malte; Chia, Dominic
Information geometry in cosmological inference problems
JCAP 01, 005(2021)

54.
11/2020
Feix, M.; Hagstotz, S. et al. (inc. Schäfer, B. M.)
Post-inflationary axion isocurvature perturbations facing CMB and large-scale structure
JCAP 11, 046(2020)

53.
3/2020
Tugendhat, Tim M.; Reischke, Robert; Schäfer, Björn Malte
Statistical separation of weak gravitational lensing and intrinsic ellipticities based on galaxy colour information
MNRAS 494, 2969(2020)

52.
12/2019
Spurio Mancini, A.; Köhlinger, F. et al. (inc. Reischke, R.; Schäfer, B. M.)
KiDS + GAMA: constraints on horndeski gravity from combined large-scale structure probes
MNRAS 490, 2155(2019)

51.
7/2019
Reischke, Robert; Schäfer, Björn Malte et al. (inc. Lautsch, Max)
Influence of the local Universe on weak gravitational lensing surveys
MNRAS 486, 5061(2019)

50.
5/2019
Feix, M.; Frank, J. et al. (inc. Schäfer, B. M.)
Isocurvature bounds on axion-like particle dark matter in the post-inflationary scenario
JCAP 05, 021(2019)

49.
4/2019
Reischke, Robert; Schäfer, Björn Malte
Environmental dependence of ellipticity correlation functions of intrinsic alignments
JCAP 04, 031(2019)

48.
1/2019
Reischke, Robert; Mancini, Alessio Spurio; Schäfer, Björn Malte; Merkel, Philipp M.
Investigating scalar-tensor gravity with statistics of the cosmic large-scale structure
MNRAS 482, 3274(2019)

47.
11/2018
Spurio Mancini, A.; Taylor, P. L. et al. (inc. Merkel, Ph. M.; Zieser, B.; Schäfer, B. M.; Reischke, R.)
3D cosmic shear: Numerical challenges, 3D lensing random fields generation, and Minkowski functionals for cosmological inference
PhRvD 98, j3507(2018)

46.
11/2018
Spurio Mancini, A.; Reischke, R. et al. (inc. Schäfer, B. M.)
Testing (modified) gravity with 3D and tomographic cosmic shear
MNRAS 480, 3725(2018)

45.
6/2018
Cuesta-Lazaro, Carolina; Quera-Bofarull, Arnau; Reischke, Robert; Schäfer, Björn Malte
Gravitational corrections to light propagation in a perturbed FLRW universe and corresponding weak-lensing spectra
MNRAS 477, 741(2018)

44.
5/2018
Tugendhat, Tim M.; Schäfer, Björn Malte
Angular ellipticity correlations in a composite alignment model for elliptical and spiral galaxies and inference from weak lensing
MNRAS 476, 3460(2018)

43.
2/2018
Piras, Davide; Joachimi, Benjamin et al. (inc. Schäfer, Björn Malte)
The mass dependence of dark matter halo alignments with large-scale structure
MNRAS 474, 1165(2018)

42.
2/2018
Reischke, Robert; Pace, Francesco; Meyer, Sven; Schäfer, Björn Malte
Shear and vorticity in the spherical collapse of dark matter haloes
MNRAS 473, 4558(2018)

41.
10/2017
Merkel, Philipp M.; Schäfer, Björn Malte
Imitating intrinsic alignments: a bias to the CMB lensing-galaxy shape cross-correlation power spectrum induced by the large-scale structure bispectrum
MNRAS 471, 2431(2017)

40.
9/2017
Schäfer, Björn Malte; Merkel, Philipp M.
Angular spectra of the intrinsic galaxy ellipticity field, their observability and their impact on lensing in tomographic surveys
MNRAS 470, 3453(2017)

39.
8/2017
Merkel, Philipp M.; Schäfer, Björn Malte
Parameter constraints from weak-lensing tomography of galaxy shapes and cosmic microwave background fluctuations
MNRAS 469, 2760(2017)

38.
4/2017
Pace, Francesco; Reischke, Robert; Meyer, Sven; Schäfer, Björn Malte
Effects of tidal gravitational fields in clustering dark energy models
MNRAS 466, 1839(2017)

37.
3/2017
Reischke, Robert; Kiessling, Alina; Schäfer, Björn Malte
Variations of cosmic large-scale structure covariance matrices across parameter space
MNRAS 465, 4016(2017)

36.
12/2016
Planck Collaboration; Ade, P. A. R. et al. (inc. Schaefer, B. M.)
Planck intermediate results. XL. The Sunyaev-Zeldovich signal from the Virgo cluster
A&A 596, A101(2016)

35.
11/2016
Reischke, Robert; Pace, Francesco; Meyer, Sven; Schäfer, Björn Malte
Spherical collapse of dark matter haloes in tidal gravitational fields
MNRAS 463, 429(2016)

34.
9/2016
Planck Collaboration; Ade, P. A. R. et al. (inc. Schaefer, B. M.)
Planck 2015 results. XXI. The integrated Sachs-Wolfe effect
A&A 594, A21(2016)

33.
9/2016
Planck Collaboration; Adam, R. et al. (inc. Schaefer, B. M.)
Planck 2015 results. I. Overview of products and scientific results
A&A 594, A1(2016)

32.
9/2016
Planck Collaboration; Ade, P. A. R. et al. (inc. Schaefer, B. M.)
Planck 2015 results. XIV. Dark energy and modified gravity
A&A 594, A14(2016)

31.
8/2016
Schäfer, Björn Malte; Reischke, Robert
Describing variations of the Fisher-matrix across parameter space
MNRAS 460, 3398(2016)

30.
2/2016
Sellentin, Elena; Schäfer, Björn Malte
Non-Gaussian forecasts of weak lensing with and without priors
MNRAS 456, 1645(2016)

29.
2/2016
Majerotto, Elisabetta; Sapone, Domenico; Schäfer, Björn Malte
Combined constraints on deviations of dark energy from an ideal fluid from Euclid and Planck
MNRAS 456, 109(2016)

28.
11/2015
Hagstotz, Steffen; Schäfer, Björn Malte; Merkel, Philipp M.
Born-corrections to weak lensing of the cosmic microwave background temperature and polarization anisotropies
MNRAS 454, 831(2015)

27.
10/2015
Merkel, Philipp M.; Schäfer, Björn Malte
Extreme value statistics of cosmic microwave background lensing deflection angles
MNRAS 453, 401(2015)

26.
12/2014
Merkel, Philipp M.; Schäfer, Björn Malte
A theoretical estimate of intrinsic ellipticity bispectra induced by angular momenta alignments
MNRAS 445, 2918(2014)

25.
8/2014
Grassi, Alessandra; Heisenberg, Lavinia et al. (inc. Schäfer, Björn Malte)
A test of the Suyama-Yamaguchi inequality from weak lensing
MNRAS 442, 1068(2014)

24.
1/2014
Grassi, Alessandra; Schäfer, Björn Malte
Detecting baryon acoustic oscillations by 3d weak lensing
MNRAS 437, 2632(2014)

23.
1/2014
Giahi-Saravani, Aram; Schäfer, Björn Malte
Weak gravitational lensing of intrinsically aligned galaxies
MNRAS 437, 1847(2014)

22.
10/2013
Capranico, Federica; Merkel, Philipp M.; Schäfer, Björn Malte
Intrinsic ellipticity correlations of galaxies: models, likelihoods and interplay with weak lensing
MNRAS 435, 194(2013)

21.
9/2013
Merkel, Philipp M.; Schäfer, Björn Malte
Intrinsic alignments and 3d weak gravitational lensing
MNRAS 434, 1808(2013)

20.
5/2013
Delabrouille, J.; Betoule, M. et al. (inc. Schaefer, B.)
The pre-launch Planck Sky Model: a model of sky emission at submillimetre to centimetre wavelengths
A&A 553, A96(2013)

19.
5/2013
Merkel, Philipp M.; Schäfer, Björn Malte
Contributions to the non-linear integrated Sachs-Wolfe effect: Birkinshaw-Gull effect and gravitational self-energy density
MNRAS 431, 2433(2013)

18.
4/2013
Jürgens, Gero; Schäfer, Björn Malte
Cross-bispectra and trispectra of the non-linear integrated Sachs-Wolfe effect and the tracer galaxy density field
MNRAS 430, 797(2013)

17.
2/2013
Merkel, Philipp M.; Schäfer, Björn Malte
The interplay of CMB temperature lensing power reconstruction with primordial non-Gaussianity of local type
MNRAS 429, 444(2013)

16.
1/2013
Giahi, Aram; Schäfer, Björn Malte
Evolution of intrinsic ellipticity correlations due to peculiar motion
MNRAS 428, 1312(2013)

15.
12/2012
Melin, J. -B.; Aghanim, N. et al. (inc. Waizmann, J. C.; Schaefer, B. M.; Bartelmann, M.)
A comparison of algorithms for the construction of SZ cluster catalogues
A&A 548, A51(2012)

14.
11/2012
Bartelmann, M.; Viola, M.; Melchior, P.; Schäfer, B. M.
Calibration biases in measurements of weak lensing
A&A 547, A98(2012)

13.
10/2012
Jürgens, Gero; Schäfer, Björn Malte
Integrated Sachs-Wolfe tomography with orthogonal polynomials
MNRAS 425, 2589(2012)

12.
7/2012
Schäfer, Björn Malte; Heisenberg, Lavinia
Weak lensing tomography with orthogonal polynomials
MNRAS 423, 3445(2012)

11.
6/2012
Ayaita, Youness; Schäfer, Björn Malte et al.
Investigating clustering dark energy with 3D weak cosmic shear
MNRAS 422, 3056(2012)

10.
4/2012
Schäfer, Björn Malte; Merkel, Philipp M.
Galactic angular momenta and angular momentum couplings in the large-scale structure
MNRAS 421, 2751(2012)

9.
3/2012
Schäfer, Björn Malte; Grassi, Alessandra et al.
A weak lensing view on primordial non-Gaussianities
MNRAS 421, 797(2012)

8.
2/2012
Schäfer, Björn Malte; Heisenberg, Lavinia et al. (inc. Kalovidouris, Angelos F.)
On the validity of the Born approximation for weak cosmic flexions
MNRAS 420, 455(2012)

7.
10/2011
Heisenberg, Lavinia; Schäfer, Björn Malte; Bartelmann, Matthias
A study of relative velocity statistics in Lagrangian perturbation theory with PINOCCHIO
MNRAS 416, 3057(2011)

6.
9/2011
Schäfer, Björn Malte; Kalovidouris, Angelos Fotios; Heisenberg, Lavinia
Parameter estimation biases due to contributions from the Rees-Sciama effect to the integrated Sachs-Wolfe spectrum
MNRAS 416, 1302(2011)

5.
4/2011
Melchior, P.; Viola, M.; Schäfer, B. M.; Bartelmann, M.
Weak gravitational lensing with DEIMOS
MNRAS 412, 1552(2011)

4.
2/2011
Merkel, Philipp M.; Schäfer, Björn Malte
Gravitational lensing of the cosmic microwave background by non-linear structures
MNRAS 411, 1067(2011)

3.
8/2009
Schaefer, Bjoern Malte; Douspis, Marian et al.
Implications of bias evolution on measurements of the integrated Sachs-Wolfe effect: errors and biases in parameter estimation
MNRAS 397, 925(2009)

2.
7/2009
Caldera-Cabral, Gabriela; Maartens, Roy; Schaefer, Bjoern Malte
The growth of structure in interacting dark energy models
JCAP 07, 027(2009)

1.
4/2009
Hollenstein, Lukas; Sapone, Domenico et al. (inc. Schäfer, Björn Malte)
Constraints on early dark energy from CMB lensing and weak lensing tomography
JCAP 04, 012(2009)

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