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Lassègues P, Biscassi MAF, Morisse M, Cidrim A, Matthews N, Labeyrie G, Rivet JP, Vakili F, Kaiser R, Guerin W, Bachelard R, Hugbart M. Field and intensity correlations: the Siegert relation from stars to quantum emitters. THE EUROPEAN PHYSICAL JOURNAL. D, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 2022; 76:246. [PMID: 36568919 PMCID: PMC9763155 DOI: 10.1140/epjd/s10053-022-00558-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Accepted: 10/27/2022] [Indexed: 06/17/2023]
Abstract
The Siegert relation relates field and intensity temporal correlations. After a historical review of the Siegert relation and the Hanbury Brown and Twiss effect, we discuss the validity of this relation in two different domains. We first show that this relation can be used in astrophysics to determine the fundamental parameters of stars, and that it is especially important for the observation with stellar emission lines. Second, we check the validity of this relation for moving quantum scatterers illuminated by a strong driving field.
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Affiliation(s)
| | - Mateus Antônio Fernandes Biscassi
- Université Côte d’Azur, CNRS, INPHYNI, Nice, France
- Departamento de Física, Universidade Federal de São Carlos, Rodovia Washington Luís, km 235 - SP-310, São Carlos, SP 13565-905 Brazil
| | | | - André Cidrim
- Departamento de Física, Universidade Federal de São Carlos, Rodovia Washington Luís, km 235 - SP-310, São Carlos, SP 13565-905 Brazil
- Department of Physics, Stockholm University, AlbaNova University Center, 10691 Stockholm, Sweden
| | | | | | - Jean-Pierre Rivet
- Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, Université Côte d’Azur, Nice, France
| | - Farrokh Vakili
- Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, Université Côte d’Azur, Nice, France
| | - Robin Kaiser
- Université Côte d’Azur, CNRS, INPHYNI, Nice, France
| | | | - Romain Bachelard
- Université Côte d’Azur, CNRS, INPHYNI, Nice, France
- Departamento de Física, Universidade Federal de São Carlos, Rodovia Washington Luís, km 235 - SP-310, São Carlos, SP 13565-905 Brazil
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Schilke P, Mehringer DM, Menten KM. A Submillimeter HCN Laser in IRC +10216. THE ASTROPHYSICAL JOURNAL 2000; 528:L37-L40. [PMID: 10587490 DOI: 10.1086/312416] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We report the detection of a strong submillimeter-wavelength HCN laser line at a frequency near 805 GHz toward the carbon star IRC +10216. This line, the J=9-8 rotational transition within the (0400) vibrationally excited state, is one of a series of HCN laser lines that were first detected in the laboratory in the early days of laser spectroscopy. Since its lower energy level is 4200 K above the ground state, the laser emission must arise from the innermost part of IRC +10216's circumstellar envelope. To better characterize this environment, we observed other, thermally emitting, vibrationally excited HCN lines and found that they, like the laser line, arise in a region of temperature approximately 1000 K that is located within the dust formation radius; this conclusion is supported by the line width of the laser. The (0400), J=9-8 laser might be chemically pumped and may be the only known laser (or maser) that is excited both in the laboratory and in space by a similar mechanism.
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