Astrophotometry
Definition
A fundamental branch of practical astrophysics that deals with measuring the intensity, flux, and brightness of radiant energy (light) emitted by celestial bodies across different bands of the electromagnetic spectrum. Data obtained through astrophotometry (using photometers or CCD sensors) allow astronomers to determine cosmic distances, surface temperatures, rotational periods of variable stars, and to detect exoplanets via the transit method.
Bilingual Equivalents
- Astrophotometry
- Stellar photometry
Grammatical & Source Details
| Inflection Type | Feminine noun, singular paradigm, standard astronomical and data reduction terminology. |
| Formation | Derived through compounding of the prefixoid 'astro-' and the physical noun 'photometry', referencing light intensity measurement. |
| Spelling / Pronunciation | [ˌæs.troʊ.fə.ˈtɒm.ə.tri] |
| Source | The Handbook of Astronomical Photometry and CCD Data Reduction |
Contextual Usage Examples
RO: Utilizând tehnica de astrofotometrie de deschidere, cercetătorii au izolat lumina stelei de zgomotul de fond al cerului.
EN: Using the aperture astrophotometry technique, researchers isolated the star's light from the background sky noise.
RO: Analiza de astrofotometrie a relevat o scădere periodică a strălucirii, confirmând existența unei planete pe orbită.
EN: The astrophotometry analysis revealed a periodic drop in brightness, confirming the existence of an orbiting planet.
RO: Profesorul a explicat cum sistemele moderne de astrofotometrie utilizează filtre standardizate precum UBVRI pentru consistența datelor.
EN: The professor explained how modern astrophotometry systems utilize standardized filters such as UBVRI for data consistency.
Idioms & Phrases
Astrofotometrie diferențială / Differential astrophotometry
RO: Metodă fotometrică extrem de precisă ce compară strălucirea unei stele țintă cu cea a unor stele de referință stabile din apropiere.
EN: A highly precise photometric method that compares the brightness of a target star with that of nearby stable reference stars.
Curbă de astrofotometrie / Astrophotometry light curve
RO: Grafic care reprezintă variația fluxului luminos al unui corp ceresc în funcție de timp, utilizat pentru studiul stelelor pulsatorii.
EN: A graph representing the variation of a celestial body's luminous flux over time, used for studying pulsating stars.
Sistem de astrofotometrie / Astrophotometry system
RO: Ansamblu instrumental format dintr-un telescop, roată de filtre standard și o cameră electronică etalonată pentru măsurători.
EN: An instrumental assembly consisting of a telescope, standard filter wheel, and an electronic camera calibrated for measurements.
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